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-rw-r--r--drivers/iio/accel/Kconfig139
-rw-r--r--drivers/iio/accel/Makefile24
-rw-r--r--drivers/iio/accel/bma180.c862
-rw-r--r--drivers/iio/accel/bmc150-accel.c1853
-rw-r--r--drivers/iio/accel/hid-sensor-accel-3d.c425
-rw-r--r--drivers/iio/accel/kxcjk-1013.c1452
-rw-r--r--drivers/iio/accel/kxsd9.c276
-rw-r--r--drivers/iio/accel/mma8452.c451
-rw-r--r--drivers/iio/accel/mma9551.c638
-rw-r--r--drivers/iio/accel/mma9551_core.c813
-rw-r--r--drivers/iio/accel/mma9551_core.h81
-rw-r--r--drivers/iio/accel/mma9553.c1332
-rw-r--r--drivers/iio/accel/ssp_accel_sensor.c169
-rw-r--r--drivers/iio/accel/st_accel.h56
-rw-r--r--drivers/iio/accel/st_accel_buffer.c105
-rw-r--r--drivers/iio/accel/st_accel_core.c622
-rw-r--r--drivers/iio/accel/st_accel_i2c.c133
-rw-r--r--drivers/iio/accel/st_accel_spi.c77
18 files changed, 9508 insertions, 0 deletions
diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig
new file mode 100644
index 000000000..7c9a9a94a
--- /dev/null
+++ b/drivers/iio/accel/Kconfig
@@ -0,0 +1,139 @@
+#
+# Accelerometer drivers
+#
+# When adding new entries keep the list in alphabetical order
+
+menu "Accelerometers"
+
+config BMA180
+ tristate "Bosch BMA180/BMA250 3-Axis Accelerometer Driver"
+ depends on I2C
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ help
+ Say Y here if you want to build a driver for the Bosch BMA180 or
+ BMA250 triaxial acceleration sensor.
+
+ To compile this driver as a module, choose M here: the
+ module will be called bma180.
+
+config BMC150_ACCEL
+ tristate "Bosch BMC150 Accelerometer Driver"
+ depends on I2C
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ help
+ Say yes here to build support for the following Bosch accelerometers:
+ BMC150, BMI055, BMA250E, BMA222E, BMA255, BMA280.
+
+ Currently this only supports the device via an i2c interface.
+
+ This is a combo module with both accelerometer and magnetometer.
+ This driver is only implementing accelerometer part, which has
+ its own address and register map.
+
+config HID_SENSOR_ACCEL_3D
+ depends on HID_SENSOR_HUB
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ select HID_SENSOR_IIO_COMMON
+ select HID_SENSOR_IIO_TRIGGER
+ tristate "HID Accelerometers 3D"
+ help
+ Say yes here to build support for the HID SENSOR
+ accelerometers 3D.
+
+ To compile this driver as a module, choose M here: the
+ module will be called hid-sensor-accel-3d.
+
+config IIO_ST_ACCEL_3AXIS
+ tristate "STMicroelectronics accelerometers 3-Axis Driver"
+ depends on (I2C || SPI_MASTER) && SYSFS
+ select IIO_ST_SENSORS_CORE
+ select IIO_ST_ACCEL_I2C_3AXIS if (I2C)
+ select IIO_ST_ACCEL_SPI_3AXIS if (SPI_MASTER)
+ select IIO_TRIGGERED_BUFFER if (IIO_BUFFER)
+ help
+ Say yes here to build support for STMicroelectronics accelerometers:
+ LSM303DLH, LSM303DLHC, LIS3DH, LSM330D, LSM330DL, LSM330DLC,
+ LIS331DLH, LSM303DL, LSM303DLM, LSM330.
+
+ This driver can also be built as a module. If so, these modules
+ will be created:
+ - st_accel (core functions for the driver [it is mandatory]);
+ - st_accel_i2c (necessary for the I2C devices [optional*]);
+ - st_accel_spi (necessary for the SPI devices [optional*]);
+
+ (*) one of these is necessary to do something.
+
+config IIO_ST_ACCEL_I2C_3AXIS
+ tristate
+ depends on IIO_ST_ACCEL_3AXIS
+ depends on IIO_ST_SENSORS_I2C
+
+config IIO_ST_ACCEL_SPI_3AXIS
+ tristate
+ depends on IIO_ST_ACCEL_3AXIS
+ depends on IIO_ST_SENSORS_SPI
+
+config KXSD9
+ tristate "Kionix KXSD9 Accelerometer Driver"
+ depends on SPI
+ help
+ Say yes here to build support for the Kionix KXSD9 accelerometer.
+ Currently this only supports the device via an SPI interface.
+
+ To compile this driver as a module, choose M here: the module
+ will be called kxsd9.
+
+config MMA8452
+ tristate "Freescale MMA8452Q Accelerometer Driver"
+ depends on I2C
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ help
+ Say yes here to build support for the Freescale MMA8452Q 3-axis
+ accelerometer.
+
+ To compile this driver as a module, choose M here: the module
+ will be called mma8452.
+
+config KXCJK1013
+ tristate "Kionix 3-Axis Accelerometer Driver"
+ depends on I2C
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ help
+ Say Y here if you want to build a driver for the Kionix KXCJK-1013
+ triaxial acceleration sensor. This driver also supports KXCJ9-1008
+ and KXTJ2-1009.
+
+ To compile this driver as a module, choose M here: the module will
+ be called kxcjk-1013.
+
+config MMA9551_CORE
+ tristate
+
+config MMA9551
+ tristate "Freescale MMA9551L Intelligent Motion-Sensing Platform Driver"
+ depends on I2C
+ select MMA9551_CORE
+
+ help
+ Say yes here to build support for the Freescale MMA9551L
+ Intelligent Motion-Sensing Platform Driver.
+
+ To compile this driver as a module, choose M here: the module
+ will be called mma9551.
+
+config MMA9553
+ tristate "Freescale MMA9553L Intelligent Pedometer Platform Driver"
+ depends on I2C
+ select MMA9551_CORE
+ help
+ Say yes here to build support for the Freescale MMA9553L
+ Intelligent Pedometer Platform Driver.
+
+ To compile this driver as a module, choose M here: the module
+ will be called mma9553.
+endmenu
diff --git a/drivers/iio/accel/Makefile b/drivers/iio/accel/Makefile
new file mode 100644
index 000000000..99d89e46c
--- /dev/null
+++ b/drivers/iio/accel/Makefile
@@ -0,0 +1,24 @@
+#
+# Makefile for industrial I/O accelerometer drivers
+#
+
+# When adding new entries keep the list in alphabetical order
+obj-$(CONFIG_BMA180) += bma180.o
+obj-$(CONFIG_BMC150_ACCEL) += bmc150-accel.o
+obj-$(CONFIG_HID_SENSOR_ACCEL_3D) += hid-sensor-accel-3d.o
+obj-$(CONFIG_KXCJK1013) += kxcjk-1013.o
+obj-$(CONFIG_KXSD9) += kxsd9.o
+obj-$(CONFIG_MMA8452) += mma8452.o
+
+obj-$(CONFIG_MMA9551_CORE) += mma9551_core.o
+obj-$(CONFIG_MMA9551) += mma9551.o
+obj-$(CONFIG_MMA9553) += mma9553.o
+
+obj-$(CONFIG_IIO_SSP_SENSORS_COMMONS) += ssp_accel_sensor.o
+
+obj-$(CONFIG_IIO_ST_ACCEL_3AXIS) += st_accel.o
+st_accel-y := st_accel_core.o
+st_accel-$(CONFIG_IIO_BUFFER) += st_accel_buffer.o
+
+obj-$(CONFIG_IIO_ST_ACCEL_I2C_3AXIS) += st_accel_i2c.o
+obj-$(CONFIG_IIO_ST_ACCEL_SPI_3AXIS) += st_accel_spi.o
diff --git a/drivers/iio/accel/bma180.c b/drivers/iio/accel/bma180.c
new file mode 100644
index 000000000..75c6d2103
--- /dev/null
+++ b/drivers/iio/accel/bma180.c
@@ -0,0 +1,862 @@
+/*
+ * bma180.c - IIO driver for Bosch BMA180 triaxial acceleration sensor
+ *
+ * Copyright 2013 Oleksandr Kravchenko <x0199363@ti.com>
+ *
+ * Support for BMA250 (c) Peter Meerwald <pmeerw@pmeerw.net>
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License. See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * SPI is not supported by driver
+ * BMA180: 7-bit I2C slave address 0x40 or 0x41
+ * BMA250: 7-bit I2C slave address 0x18 or 0x19
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/of.h>
+#include <linux/bitops.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+
+#define BMA180_DRV_NAME "bma180"
+#define BMA180_IRQ_NAME "bma180_event"
+
+enum {
+ BMA180,
+ BMA250,
+};
+
+struct bma180_data;
+
+struct bma180_part_info {
+ const struct iio_chan_spec *channels;
+ unsigned num_channels;
+ const int *scale_table;
+ unsigned num_scales;
+ const int *bw_table;
+ unsigned num_bw;
+
+ u8 int_reset_reg, int_reset_mask;
+ u8 sleep_reg, sleep_mask;
+ u8 bw_reg, bw_mask;
+ u8 scale_reg, scale_mask;
+ u8 power_reg, power_mask, lowpower_val;
+ u8 int_enable_reg, int_enable_mask;
+ u8 softreset_reg;
+
+ int (*chip_config)(struct bma180_data *data);
+ void (*chip_disable)(struct bma180_data *data);
+};
+
+/* Register set */
+#define BMA180_CHIP_ID 0x00 /* Need to distinguish BMA180 from other */
+#define BMA180_ACC_X_LSB 0x02 /* First of 6 registers of accel data */
+#define BMA180_TEMP 0x08
+#define BMA180_CTRL_REG0 0x0d
+#define BMA180_RESET 0x10
+#define BMA180_BW_TCS 0x20
+#define BMA180_CTRL_REG3 0x21
+#define BMA180_TCO_Z 0x30
+#define BMA180_OFFSET_LSB1 0x35
+
+/* BMA180_CTRL_REG0 bits */
+#define BMA180_DIS_WAKE_UP BIT(0) /* Disable wake up mode */
+#define BMA180_SLEEP BIT(1) /* 1 - chip will sleep */
+#define BMA180_EE_W BIT(4) /* Unlock writing to addr from 0x20 */
+#define BMA180_RESET_INT BIT(6) /* Reset pending interrupts */
+
+/* BMA180_CTRL_REG3 bits */
+#define BMA180_NEW_DATA_INT BIT(1) /* Intr every new accel data is ready */
+
+/* BMA180_OFFSET_LSB1 skipping mode bit */
+#define BMA180_SMP_SKIP BIT(0)
+
+/* Bit masks for registers bit fields */
+#define BMA180_RANGE 0x0e /* Range of measured accel values */
+#define BMA180_BW 0xf0 /* Accel bandwidth */
+#define BMA180_MODE_CONFIG 0x03 /* Config operation modes */
+
+/* We have to write this value in reset register to do soft reset */
+#define BMA180_RESET_VAL 0xb6
+
+#define BMA180_ID_REG_VAL 0x03
+
+/* Chip power modes */
+#define BMA180_LOW_POWER 0x03
+
+#define BMA250_RANGE_REG 0x0f
+#define BMA250_BW_REG 0x10
+#define BMA250_POWER_REG 0x11
+#define BMA250_RESET_REG 0x14
+#define BMA250_INT_ENABLE_REG 0x17
+#define BMA250_INT_MAP_REG 0x1a
+#define BMA250_INT_RESET_REG 0x21
+
+#define BMA250_RANGE_MASK GENMASK(3, 0) /* Range of accel values */
+#define BMA250_BW_MASK GENMASK(4, 0) /* Accel bandwidth */
+#define BMA250_SUSPEND_MASK BIT(7) /* chip will sleep */
+#define BMA250_LOWPOWER_MASK BIT(6)
+#define BMA250_DATA_INTEN_MASK BIT(4)
+#define BMA250_INT1_DATA_MASK BIT(0)
+#define BMA250_INT_RESET_MASK BIT(7) /* Reset pending interrupts */
+
+struct bma180_data {
+ struct i2c_client *client;
+ struct iio_trigger *trig;
+ const struct bma180_part_info *part_info;
+ struct mutex mutex;
+ bool sleep_state;
+ int scale;
+ int bw;
+ bool pmode;
+ u8 buff[16]; /* 3x 16-bit + 8-bit + padding + timestamp */
+};
+
+enum bma180_chan {
+ AXIS_X,
+ AXIS_Y,
+ AXIS_Z,
+ TEMP
+};
+
+static int bma180_bw_table[] = { 10, 20, 40, 75, 150, 300 }; /* Hz */
+static int bma180_scale_table[] = { 1275, 1863, 2452, 3727, 4903, 9709, 19417 };
+
+static int bma250_bw_table[] = { 8, 16, 31, 63, 125, 250 }; /* Hz */
+static int bma250_scale_table[] = { 0, 0, 0, 38344, 0, 76590, 0, 0, 153180, 0,
+ 0, 0, 306458 };
+
+static int bma180_get_data_reg(struct bma180_data *data, enum bma180_chan chan)
+{
+ int ret;
+
+ if (data->sleep_state)
+ return -EBUSY;
+
+ switch (chan) {
+ case TEMP:
+ ret = i2c_smbus_read_byte_data(data->client, BMA180_TEMP);
+ if (ret < 0)
+ dev_err(&data->client->dev, "failed to read temp register\n");
+ break;
+ default:
+ ret = i2c_smbus_read_word_data(data->client,
+ BMA180_ACC_X_LSB + chan * 2);
+ if (ret < 0)
+ dev_err(&data->client->dev,
+ "failed to read accel_%c register\n",
+ 'x' + chan);
+ }
+
+ return ret;
+}
+
+static int bma180_set_bits(struct bma180_data *data, u8 reg, u8 mask, u8 val)
+{
+ int ret = i2c_smbus_read_byte_data(data->client, reg);
+ u8 reg_val = (ret & ~mask) | (val << (ffs(mask) - 1));
+
+ if (ret < 0)
+ return ret;
+
+ return i2c_smbus_write_byte_data(data->client, reg, reg_val);
+}
+
+static int bma180_reset_intr(struct bma180_data *data)
+{
+ int ret = bma180_set_bits(data, data->part_info->int_reset_reg,
+ data->part_info->int_reset_mask, 1);
+
+ if (ret)
+ dev_err(&data->client->dev, "failed to reset interrupt\n");
+
+ return ret;
+}
+
+static int bma180_set_new_data_intr_state(struct bma180_data *data, bool state)
+{
+ int ret = bma180_set_bits(data, data->part_info->int_enable_reg,
+ data->part_info->int_enable_mask, state);
+ if (ret)
+ goto err;
+ ret = bma180_reset_intr(data);
+ if (ret)
+ goto err;
+
+ return 0;
+
+err:
+ dev_err(&data->client->dev,
+ "failed to set new data interrupt state %d\n", state);
+ return ret;
+}
+
+static int bma180_set_sleep_state(struct bma180_data *data, bool state)
+{
+ int ret = bma180_set_bits(data, data->part_info->sleep_reg,
+ data->part_info->sleep_mask, state);
+
+ if (ret) {
+ dev_err(&data->client->dev,
+ "failed to set sleep state %d\n", state);
+ return ret;
+ }
+ data->sleep_state = state;
+
+ return 0;
+}
+
+static int bma180_set_ee_writing_state(struct bma180_data *data, bool state)
+{
+ int ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_EE_W, state);
+
+ if (ret)
+ dev_err(&data->client->dev,
+ "failed to set ee writing state %d\n", state);
+
+ return ret;
+}
+
+static int bma180_set_bw(struct bma180_data *data, int val)
+{
+ int ret, i;
+
+ if (data->sleep_state)
+ return -EBUSY;
+
+ for (i = 0; i < data->part_info->num_bw; ++i) {
+ if (data->part_info->bw_table[i] == val) {
+ ret = bma180_set_bits(data, data->part_info->bw_reg,
+ data->part_info->bw_mask, i);
+ if (ret) {
+ dev_err(&data->client->dev,
+ "failed to set bandwidth\n");
+ return ret;
+ }
+ data->bw = val;
+ return 0;
+ }
+ }
+
+ return -EINVAL;
+}
+
+static int bma180_set_scale(struct bma180_data *data, int val)
+{
+ int ret, i;
+
+ if (data->sleep_state)
+ return -EBUSY;
+
+ for (i = 0; i < data->part_info->num_scales; ++i)
+ if (data->part_info->scale_table[i] == val) {
+ ret = bma180_set_bits(data, data->part_info->scale_reg,
+ data->part_info->scale_mask, i);
+ if (ret) {
+ dev_err(&data->client->dev,
+ "failed to set scale\n");
+ return ret;
+ }
+ data->scale = val;
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+static int bma180_set_pmode(struct bma180_data *data, bool mode)
+{
+ u8 reg_val = mode ? data->part_info->lowpower_val : 0;
+ int ret = bma180_set_bits(data, data->part_info->power_reg,
+ data->part_info->power_mask, reg_val);
+
+ if (ret) {
+ dev_err(&data->client->dev, "failed to set power mode\n");
+ return ret;
+ }
+ data->pmode = mode;
+
+ return 0;
+}
+
+static int bma180_soft_reset(struct bma180_data *data)
+{
+ int ret = i2c_smbus_write_byte_data(data->client,
+ data->part_info->softreset_reg, BMA180_RESET_VAL);
+
+ if (ret)
+ dev_err(&data->client->dev, "failed to reset the chip\n");
+
+ return ret;
+}
+
+static int bma180_chip_init(struct bma180_data *data)
+{
+ /* Try to read chip_id register. It must return 0x03. */
+ int ret = i2c_smbus_read_byte_data(data->client, BMA180_CHIP_ID);
+
+ if (ret < 0)
+ return ret;
+ if (ret != BMA180_ID_REG_VAL)
+ return -ENODEV;
+
+ ret = bma180_soft_reset(data);
+ if (ret)
+ return ret;
+ /*
+ * No serial transaction should occur within minimum 10 us
+ * after soft_reset command
+ */
+ msleep(20);
+
+ ret = bma180_set_new_data_intr_state(data, false);
+ if (ret)
+ return ret;
+
+ return bma180_set_pmode(data, false);
+}
+
+static int bma180_chip_config(struct bma180_data *data)
+{
+ int ret = bma180_chip_init(data);
+
+ if (ret)
+ goto err;
+ ret = bma180_set_bits(data, BMA180_CTRL_REG0, BMA180_DIS_WAKE_UP, 1);
+ if (ret)
+ goto err;
+ ret = bma180_set_ee_writing_state(data, true);
+ if (ret)
+ goto err;
+ ret = bma180_set_bits(data, BMA180_OFFSET_LSB1, BMA180_SMP_SKIP, 1);
+ if (ret)
+ goto err;
+ ret = bma180_set_bw(data, 20); /* 20 Hz */
+ if (ret)
+ goto err;
+ ret = bma180_set_scale(data, 2452); /* 2 G */
+ if (ret)
+ goto err;
+
+ return 0;
+
+err:
+ dev_err(&data->client->dev, "failed to config the chip\n");
+ return ret;
+}
+
+static int bma250_chip_config(struct bma180_data *data)
+{
+ int ret = bma180_chip_init(data);
+
+ if (ret)
+ goto err;
+ ret = bma180_set_bw(data, 16); /* 16 Hz */
+ if (ret)
+ goto err;
+ ret = bma180_set_scale(data, 38344); /* 2 G */
+ if (ret)
+ goto err;
+ ret = bma180_set_bits(data, BMA250_INT_MAP_REG,
+ BMA250_INT1_DATA_MASK, 1);
+ if (ret)
+ goto err;
+
+ return 0;
+
+err:
+ dev_err(&data->client->dev, "failed to config the chip\n");
+ return ret;
+}
+
+static void bma180_chip_disable(struct bma180_data *data)
+{
+ if (bma180_set_new_data_intr_state(data, false))
+ goto err;
+ if (bma180_set_ee_writing_state(data, false))
+ goto err;
+ if (bma180_set_sleep_state(data, true))
+ goto err;
+
+ return;
+
+err:
+ dev_err(&data->client->dev, "failed to disable the chip\n");
+}
+
+static void bma250_chip_disable(struct bma180_data *data)
+{
+ if (bma180_set_new_data_intr_state(data, false))
+ goto err;
+ if (bma180_set_sleep_state(data, true))
+ goto err;
+
+ return;
+
+err:
+ dev_err(&data->client->dev, "failed to disable the chip\n");
+}
+
+static ssize_t bma180_show_avail(char *buf, const int *vals, unsigned n,
+ bool micros)
+{
+ size_t len = 0;
+ int i;
+
+ for (i = 0; i < n; i++) {
+ if (!vals[i])
+ continue;
+ len += scnprintf(buf + len, PAGE_SIZE - len,
+ micros ? "0.%06d " : "%d ", vals[i]);
+ }
+ buf[len - 1] = '\n';
+
+ return len;
+}
+
+static ssize_t bma180_show_filter_freq_avail(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct bma180_data *data = iio_priv(dev_to_iio_dev(dev));
+
+ return bma180_show_avail(buf, data->part_info->bw_table,
+ data->part_info->num_bw, false);
+}
+
+static ssize_t bma180_show_scale_avail(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct bma180_data *data = iio_priv(dev_to_iio_dev(dev));
+
+ return bma180_show_avail(buf, data->part_info->scale_table,
+ data->part_info->num_scales, true);
+}
+
+static IIO_DEVICE_ATTR(in_accel_filter_low_pass_3db_frequency_available,
+ S_IRUGO, bma180_show_filter_freq_avail, NULL, 0);
+
+static IIO_DEVICE_ATTR(in_accel_scale_available,
+ S_IRUGO, bma180_show_scale_avail, NULL, 0);
+
+static struct attribute *bma180_attributes[] = {
+ &iio_dev_attr_in_accel_filter_low_pass_3db_frequency_available.
+ dev_attr.attr,
+ &iio_dev_attr_in_accel_scale_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group bma180_attrs_group = {
+ .attrs = bma180_attributes,
+};
+
+static int bma180_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int *val, int *val2,
+ long mask)
+{
+ struct bma180_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ mutex_lock(&data->mutex);
+ if (iio_buffer_enabled(indio_dev)) {
+ mutex_unlock(&data->mutex);
+ return -EBUSY;
+ }
+ ret = bma180_get_data_reg(data, chan->scan_index);
+ mutex_unlock(&data->mutex);
+ if (ret < 0)
+ return ret;
+ *val = sign_extend32(ret >> chan->scan_type.shift,
+ chan->scan_type.realbits - 1);
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
+ *val = data->bw;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_ACCEL:
+ *val = 0;
+ *val2 = data->scale;
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_TEMP:
+ *val = 500;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_OFFSET:
+ *val = 48; /* 0 LSB @ 24 degree C */
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int bma180_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int val, int val2, long mask)
+{
+ struct bma180_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SCALE:
+ if (val)
+ return -EINVAL;
+ mutex_lock(&data->mutex);
+ ret = bma180_set_scale(data, val2);
+ mutex_unlock(&data->mutex);
+ return ret;
+ case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
+ if (val2)
+ return -EINVAL;
+ mutex_lock(&data->mutex);
+ ret = bma180_set_bw(data, val);
+ mutex_unlock(&data->mutex);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+}
+
+static const struct iio_info bma180_info = {
+ .attrs = &bma180_attrs_group,
+ .read_raw = bma180_read_raw,
+ .write_raw = bma180_write_raw,
+ .driver_module = THIS_MODULE,
+};
+
+static const char * const bma180_power_modes[] = { "low_noise", "low_power" };
+
+static int bma180_get_power_mode(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan)
+{
+ struct bma180_data *data = iio_priv(indio_dev);
+
+ return data->pmode;
+}
+
+static int bma180_set_power_mode(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, unsigned int mode)
+{
+ struct bma180_data *data = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&data->mutex);
+ ret = bma180_set_pmode(data, mode);
+ mutex_unlock(&data->mutex);
+
+ return ret;
+}
+
+static const struct iio_enum bma180_power_mode_enum = {
+ .items = bma180_power_modes,
+ .num_items = ARRAY_SIZE(bma180_power_modes),
+ .get = bma180_get_power_mode,
+ .set = bma180_set_power_mode,
+};
+
+static const struct iio_chan_spec_ext_info bma180_ext_info[] = {
+ IIO_ENUM("power_mode", true, &bma180_power_mode_enum),
+ IIO_ENUM_AVAILABLE("power_mode", &bma180_power_mode_enum),
+ { },
+};
+
+#define BMA180_ACC_CHANNEL(_axis, _bits) { \
+ .type = IIO_ACCEL, \
+ .modified = 1, \
+ .channel2 = IIO_MOD_##_axis, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
+ BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), \
+ .scan_index = AXIS_##_axis, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = _bits, \
+ .storagebits = 16, \
+ .shift = 16 - _bits, \
+ }, \
+ .ext_info = bma180_ext_info, \
+}
+
+#define BMA180_TEMP_CHANNEL { \
+ .type = IIO_TEMP, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OFFSET), \
+ .scan_index = TEMP, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = 8, \
+ .storagebits = 16, \
+ }, \
+}
+
+static const struct iio_chan_spec bma180_channels[] = {
+ BMA180_ACC_CHANNEL(X, 14),
+ BMA180_ACC_CHANNEL(Y, 14),
+ BMA180_ACC_CHANNEL(Z, 14),
+ BMA180_TEMP_CHANNEL,
+ IIO_CHAN_SOFT_TIMESTAMP(4),
+};
+
+static const struct iio_chan_spec bma250_channels[] = {
+ BMA180_ACC_CHANNEL(X, 10),
+ BMA180_ACC_CHANNEL(Y, 10),
+ BMA180_ACC_CHANNEL(Z, 10),
+ BMA180_TEMP_CHANNEL,
+ IIO_CHAN_SOFT_TIMESTAMP(4),
+};
+
+static const struct bma180_part_info bma180_part_info[] = {
+ [BMA180] = {
+ bma180_channels, ARRAY_SIZE(bma180_channels),
+ bma180_scale_table, ARRAY_SIZE(bma180_scale_table),
+ bma180_bw_table, ARRAY_SIZE(bma180_bw_table),
+ BMA180_CTRL_REG0, BMA180_RESET_INT,
+ BMA180_CTRL_REG0, BMA180_SLEEP,
+ BMA180_BW_TCS, BMA180_BW,
+ BMA180_OFFSET_LSB1, BMA180_RANGE,
+ BMA180_TCO_Z, BMA180_MODE_CONFIG, BMA180_LOW_POWER,
+ BMA180_CTRL_REG3, BMA180_NEW_DATA_INT,
+ BMA180_RESET,
+ bma180_chip_config,
+ bma180_chip_disable,
+ },
+ [BMA250] = {
+ bma250_channels, ARRAY_SIZE(bma250_channels),
+ bma250_scale_table, ARRAY_SIZE(bma250_scale_table),
+ bma250_bw_table, ARRAY_SIZE(bma250_bw_table),
+ BMA250_INT_RESET_REG, BMA250_INT_RESET_MASK,
+ BMA250_POWER_REG, BMA250_SUSPEND_MASK,
+ BMA250_BW_REG, BMA250_BW_MASK,
+ BMA250_RANGE_REG, BMA250_RANGE_MASK,
+ BMA250_POWER_REG, BMA250_LOWPOWER_MASK, 1,
+ BMA250_INT_ENABLE_REG, BMA250_DATA_INTEN_MASK,
+ BMA250_RESET_REG,
+ bma250_chip_config,
+ bma250_chip_disable,
+ },
+};
+
+static irqreturn_t bma180_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct bma180_data *data = iio_priv(indio_dev);
+ int64_t time_ns = iio_get_time_ns();
+ int bit, ret, i = 0;
+
+ mutex_lock(&data->mutex);
+
+ for_each_set_bit(bit, indio_dev->active_scan_mask,
+ indio_dev->masklength) {
+ ret = bma180_get_data_reg(data, bit);
+ if (ret < 0) {
+ mutex_unlock(&data->mutex);
+ goto err;
+ }
+ ((s16 *)data->buff)[i++] = ret;
+ }
+
+ mutex_unlock(&data->mutex);
+
+ iio_push_to_buffers_with_timestamp(indio_dev, data->buff, time_ns);
+err:
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+}
+
+static int bma180_data_rdy_trigger_set_state(struct iio_trigger *trig,
+ bool state)
+{
+ struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+ struct bma180_data *data = iio_priv(indio_dev);
+
+ return bma180_set_new_data_intr_state(data, state);
+}
+
+static int bma180_trig_try_reen(struct iio_trigger *trig)
+{
+ struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+ struct bma180_data *data = iio_priv(indio_dev);
+
+ return bma180_reset_intr(data);
+}
+
+static const struct iio_trigger_ops bma180_trigger_ops = {
+ .set_trigger_state = bma180_data_rdy_trigger_set_state,
+ .try_reenable = bma180_trig_try_reen,
+ .owner = THIS_MODULE,
+};
+
+static int bma180_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct bma180_data *data;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+ data->part_info = &bma180_part_info[id->driver_data];
+
+ ret = data->part_info->chip_config(data);
+ if (ret < 0)
+ goto err_chip_disable;
+
+ mutex_init(&data->mutex);
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->channels = data->part_info->channels;
+ indio_dev->num_channels = data->part_info->num_channels;
+ indio_dev->name = id->name;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->info = &bma180_info;
+
+ if (client->irq > 0) {
+ data->trig = iio_trigger_alloc("%s-dev%d", indio_dev->name,
+ indio_dev->id);
+ if (!data->trig) {
+ ret = -ENOMEM;
+ goto err_chip_disable;
+ }
+
+ ret = devm_request_irq(&client->dev, client->irq,
+ iio_trigger_generic_data_rdy_poll, IRQF_TRIGGER_RISING,
+ "bma180_event", data->trig);
+ if (ret) {
+ dev_err(&client->dev, "unable to request IRQ\n");
+ goto err_trigger_free;
+ }
+
+ data->trig->dev.parent = &client->dev;
+ data->trig->ops = &bma180_trigger_ops;
+ iio_trigger_set_drvdata(data->trig, indio_dev);
+ indio_dev->trig = iio_trigger_get(data->trig);
+
+ ret = iio_trigger_register(data->trig);
+ if (ret)
+ goto err_trigger_free;
+ }
+
+ ret = iio_triggered_buffer_setup(indio_dev, NULL,
+ bma180_trigger_handler, NULL);
+ if (ret < 0) {
+ dev_err(&client->dev, "unable to setup iio triggered buffer\n");
+ goto err_trigger_unregister;
+ }
+
+ ret = iio_device_register(indio_dev);
+ if (ret < 0) {
+ dev_err(&client->dev, "unable to register iio device\n");
+ goto err_buffer_cleanup;
+ }
+
+ return 0;
+
+err_buffer_cleanup:
+ iio_triggered_buffer_cleanup(indio_dev);
+err_trigger_unregister:
+ if (data->trig)
+ iio_trigger_unregister(data->trig);
+err_trigger_free:
+ iio_trigger_free(data->trig);
+err_chip_disable:
+ data->part_info->chip_disable(data);
+
+ return ret;
+}
+
+static int bma180_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct bma180_data *data = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+ iio_triggered_buffer_cleanup(indio_dev);
+ if (data->trig) {
+ iio_trigger_unregister(data->trig);
+ iio_trigger_free(data->trig);
+ }
+
+ mutex_lock(&data->mutex);
+ data->part_info->chip_disable(data);
+ mutex_unlock(&data->mutex);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int bma180_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct bma180_data *data = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&data->mutex);
+ ret = bma180_set_sleep_state(data, true);
+ mutex_unlock(&data->mutex);
+
+ return ret;
+}
+
+static int bma180_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct bma180_data *data = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&data->mutex);
+ ret = bma180_set_sleep_state(data, false);
+ mutex_unlock(&data->mutex);
+
+ return ret;
+}
+
+static SIMPLE_DEV_PM_OPS(bma180_pm_ops, bma180_suspend, bma180_resume);
+#define BMA180_PM_OPS (&bma180_pm_ops)
+#else
+#define BMA180_PM_OPS NULL
+#endif
+
+static struct i2c_device_id bma180_ids[] = {
+ { "bma180", BMA180 },
+ { "bma250", BMA250 },
+ { }
+};
+
+MODULE_DEVICE_TABLE(i2c, bma180_ids);
+
+static struct i2c_driver bma180_driver = {
+ .driver = {
+ .name = "bma180",
+ .owner = THIS_MODULE,
+ .pm = BMA180_PM_OPS,
+ },
+ .probe = bma180_probe,
+ .remove = bma180_remove,
+ .id_table = bma180_ids,
+};
+
+module_i2c_driver(bma180_driver);
+
+MODULE_AUTHOR("Kravchenko Oleksandr <x0199363@ti.com>");
+MODULE_AUTHOR("Texas Instruments, Inc.");
+MODULE_DESCRIPTION("Bosch BMA180/BMA250 triaxial acceleration sensor");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/accel/bmc150-accel.c b/drivers/iio/accel/bmc150-accel.c
new file mode 100644
index 000000000..bf827d012
--- /dev/null
+++ b/drivers/iio/accel/bmc150-accel.c
@@ -0,0 +1,1853 @@
+/*
+ * 3-axis accelerometer driver supporting following Bosch-Sensortec chips:
+ * - BMC150
+ * - BMI055
+ * - BMA255
+ * - BMA250E
+ * - BMA222E
+ * - BMA280
+ *
+ * Copyright (c) 2014, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/acpi.h>
+#include <linux/gpio/consumer.h>
+#include <linux/pm.h>
+#include <linux/pm_runtime.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/events.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+
+#define BMC150_ACCEL_DRV_NAME "bmc150_accel"
+#define BMC150_ACCEL_IRQ_NAME "bmc150_accel_event"
+#define BMC150_ACCEL_GPIO_NAME "bmc150_accel_int"
+
+#define BMC150_ACCEL_REG_CHIP_ID 0x00
+
+#define BMC150_ACCEL_REG_INT_STATUS_2 0x0B
+#define BMC150_ACCEL_ANY_MOTION_MASK 0x07
+#define BMC150_ACCEL_ANY_MOTION_BIT_X BIT(0)
+#define BMC150_ACCEL_ANY_MOTION_BIT_Y BIT(1)
+#define BMC150_ACCEL_ANY_MOTION_BIT_Z BIT(2)
+#define BMC150_ACCEL_ANY_MOTION_BIT_SIGN BIT(3)
+
+#define BMC150_ACCEL_REG_PMU_LPW 0x11
+#define BMC150_ACCEL_PMU_MODE_MASK 0xE0
+#define BMC150_ACCEL_PMU_MODE_SHIFT 5
+#define BMC150_ACCEL_PMU_BIT_SLEEP_DUR_MASK 0x17
+#define BMC150_ACCEL_PMU_BIT_SLEEP_DUR_SHIFT 1
+
+#define BMC150_ACCEL_REG_PMU_RANGE 0x0F
+
+#define BMC150_ACCEL_DEF_RANGE_2G 0x03
+#define BMC150_ACCEL_DEF_RANGE_4G 0x05
+#define BMC150_ACCEL_DEF_RANGE_8G 0x08
+#define BMC150_ACCEL_DEF_RANGE_16G 0x0C
+
+/* Default BW: 125Hz */
+#define BMC150_ACCEL_REG_PMU_BW 0x10
+#define BMC150_ACCEL_DEF_BW 125
+
+#define BMC150_ACCEL_REG_INT_MAP_0 0x19
+#define BMC150_ACCEL_INT_MAP_0_BIT_SLOPE BIT(2)
+
+#define BMC150_ACCEL_REG_INT_MAP_1 0x1A
+#define BMC150_ACCEL_INT_MAP_1_BIT_DATA BIT(0)
+#define BMC150_ACCEL_INT_MAP_1_BIT_FWM BIT(1)
+#define BMC150_ACCEL_INT_MAP_1_BIT_FFULL BIT(2)
+
+#define BMC150_ACCEL_REG_INT_RST_LATCH 0x21
+#define BMC150_ACCEL_INT_MODE_LATCH_RESET 0x80
+#define BMC150_ACCEL_INT_MODE_LATCH_INT 0x0F
+#define BMC150_ACCEL_INT_MODE_NON_LATCH_INT 0x00
+
+#define BMC150_ACCEL_REG_INT_EN_0 0x16
+#define BMC150_ACCEL_INT_EN_BIT_SLP_X BIT(0)
+#define BMC150_ACCEL_INT_EN_BIT_SLP_Y BIT(1)
+#define BMC150_ACCEL_INT_EN_BIT_SLP_Z BIT(2)
+
+#define BMC150_ACCEL_REG_INT_EN_1 0x17
+#define BMC150_ACCEL_INT_EN_BIT_DATA_EN BIT(4)
+#define BMC150_ACCEL_INT_EN_BIT_FFULL_EN BIT(5)
+#define BMC150_ACCEL_INT_EN_BIT_FWM_EN BIT(6)
+
+#define BMC150_ACCEL_REG_INT_OUT_CTRL 0x20
+#define BMC150_ACCEL_INT_OUT_CTRL_INT1_LVL BIT(0)
+
+#define BMC150_ACCEL_REG_INT_5 0x27
+#define BMC150_ACCEL_SLOPE_DUR_MASK 0x03
+
+#define BMC150_ACCEL_REG_INT_6 0x28
+#define BMC150_ACCEL_SLOPE_THRES_MASK 0xFF
+
+/* Slope duration in terms of number of samples */
+#define BMC150_ACCEL_DEF_SLOPE_DURATION 1
+/* in terms of multiples of g's/LSB, based on range */
+#define BMC150_ACCEL_DEF_SLOPE_THRESHOLD 1
+
+#define BMC150_ACCEL_REG_XOUT_L 0x02
+
+#define BMC150_ACCEL_MAX_STARTUP_TIME_MS 100
+
+/* Sleep Duration values */
+#define BMC150_ACCEL_SLEEP_500_MICRO 0x05
+#define BMC150_ACCEL_SLEEP_1_MS 0x06
+#define BMC150_ACCEL_SLEEP_2_MS 0x07
+#define BMC150_ACCEL_SLEEP_4_MS 0x08
+#define BMC150_ACCEL_SLEEP_6_MS 0x09
+#define BMC150_ACCEL_SLEEP_10_MS 0x0A
+#define BMC150_ACCEL_SLEEP_25_MS 0x0B
+#define BMC150_ACCEL_SLEEP_50_MS 0x0C
+#define BMC150_ACCEL_SLEEP_100_MS 0x0D
+#define BMC150_ACCEL_SLEEP_500_MS 0x0E
+#define BMC150_ACCEL_SLEEP_1_SEC 0x0F
+
+#define BMC150_ACCEL_REG_TEMP 0x08
+#define BMC150_ACCEL_TEMP_CENTER_VAL 24
+
+#define BMC150_ACCEL_AXIS_TO_REG(axis) (BMC150_ACCEL_REG_XOUT_L + (axis * 2))
+#define BMC150_AUTO_SUSPEND_DELAY_MS 2000
+
+#define BMC150_ACCEL_REG_FIFO_STATUS 0x0E
+#define BMC150_ACCEL_REG_FIFO_CONFIG0 0x30
+#define BMC150_ACCEL_REG_FIFO_CONFIG1 0x3E
+#define BMC150_ACCEL_REG_FIFO_DATA 0x3F
+#define BMC150_ACCEL_FIFO_LENGTH 32
+
+enum bmc150_accel_axis {
+ AXIS_X,
+ AXIS_Y,
+ AXIS_Z,
+};
+
+enum bmc150_power_modes {
+ BMC150_ACCEL_SLEEP_MODE_NORMAL,
+ BMC150_ACCEL_SLEEP_MODE_DEEP_SUSPEND,
+ BMC150_ACCEL_SLEEP_MODE_LPM,
+ BMC150_ACCEL_SLEEP_MODE_SUSPEND = 0x04,
+};
+
+struct bmc150_scale_info {
+ int scale;
+ u8 reg_range;
+};
+
+struct bmc150_accel_chip_info {
+ u8 chip_id;
+ const struct iio_chan_spec *channels;
+ int num_channels;
+ const struct bmc150_scale_info scale_table[4];
+};
+
+struct bmc150_accel_interrupt {
+ const struct bmc150_accel_interrupt_info *info;
+ atomic_t users;
+};
+
+struct bmc150_accel_trigger {
+ struct bmc150_accel_data *data;
+ struct iio_trigger *indio_trig;
+ int (*setup)(struct bmc150_accel_trigger *t, bool state);
+ int intr;
+ bool enabled;
+};
+
+enum bmc150_accel_interrupt_id {
+ BMC150_ACCEL_INT_DATA_READY,
+ BMC150_ACCEL_INT_ANY_MOTION,
+ BMC150_ACCEL_INT_WATERMARK,
+ BMC150_ACCEL_INTERRUPTS,
+};
+
+enum bmc150_accel_trigger_id {
+ BMC150_ACCEL_TRIGGER_DATA_READY,
+ BMC150_ACCEL_TRIGGER_ANY_MOTION,
+ BMC150_ACCEL_TRIGGERS,
+};
+
+struct bmc150_accel_data {
+ struct i2c_client *client;
+ struct bmc150_accel_interrupt interrupts[BMC150_ACCEL_INTERRUPTS];
+ atomic_t active_intr;
+ struct bmc150_accel_trigger triggers[BMC150_ACCEL_TRIGGERS];
+ struct mutex mutex;
+ u8 fifo_mode, watermark;
+ s16 buffer[8];
+ u8 bw_bits;
+ u32 slope_dur;
+ u32 slope_thres;
+ u32 range;
+ int ev_enable_state;
+ int64_t timestamp, old_timestamp;
+ const struct bmc150_accel_chip_info *chip_info;
+};
+
+static const struct {
+ int val;
+ int val2;
+ u8 bw_bits;
+} bmc150_accel_samp_freq_table[] = { {15, 620000, 0x08},
+ {31, 260000, 0x09},
+ {62, 500000, 0x0A},
+ {125, 0, 0x0B},
+ {250, 0, 0x0C},
+ {500, 0, 0x0D},
+ {1000, 0, 0x0E},
+ {2000, 0, 0x0F} };
+
+static const struct {
+ int bw_bits;
+ int msec;
+} bmc150_accel_sample_upd_time[] = { {0x08, 64},
+ {0x09, 32},
+ {0x0A, 16},
+ {0x0B, 8},
+ {0x0C, 4},
+ {0x0D, 2},
+ {0x0E, 1},
+ {0x0F, 1} };
+
+static const struct {
+ int sleep_dur;
+ u8 reg_value;
+} bmc150_accel_sleep_value_table[] = { {0, 0},
+ {500, BMC150_ACCEL_SLEEP_500_MICRO},
+ {1000, BMC150_ACCEL_SLEEP_1_MS},
+ {2000, BMC150_ACCEL_SLEEP_2_MS},
+ {4000, BMC150_ACCEL_SLEEP_4_MS},
+ {6000, BMC150_ACCEL_SLEEP_6_MS},
+ {10000, BMC150_ACCEL_SLEEP_10_MS},
+ {25000, BMC150_ACCEL_SLEEP_25_MS},
+ {50000, BMC150_ACCEL_SLEEP_50_MS},
+ {100000, BMC150_ACCEL_SLEEP_100_MS},
+ {500000, BMC150_ACCEL_SLEEP_500_MS},
+ {1000000, BMC150_ACCEL_SLEEP_1_SEC} };
+
+
+static int bmc150_accel_set_mode(struct bmc150_accel_data *data,
+ enum bmc150_power_modes mode,
+ int dur_us)
+{
+ int i;
+ int ret;
+ u8 lpw_bits;
+ int dur_val = -1;
+
+ if (dur_us > 0) {
+ for (i = 0; i < ARRAY_SIZE(bmc150_accel_sleep_value_table);
+ ++i) {
+ if (bmc150_accel_sleep_value_table[i].sleep_dur ==
+ dur_us)
+ dur_val =
+ bmc150_accel_sleep_value_table[i].reg_value;
+ }
+ } else
+ dur_val = 0;
+
+ if (dur_val < 0)
+ return -EINVAL;
+
+ lpw_bits = mode << BMC150_ACCEL_PMU_MODE_SHIFT;
+ lpw_bits |= (dur_val << BMC150_ACCEL_PMU_BIT_SLEEP_DUR_SHIFT);
+
+ dev_dbg(&data->client->dev, "Set Mode bits %x\n", lpw_bits);
+
+ ret = i2c_smbus_write_byte_data(data->client,
+ BMC150_ACCEL_REG_PMU_LPW, lpw_bits);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error writing reg_pmu_lpw\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int bmc150_accel_set_bw(struct bmc150_accel_data *data, int val,
+ int val2)
+{
+ int i;
+ int ret;
+
+ for (i = 0; i < ARRAY_SIZE(bmc150_accel_samp_freq_table); ++i) {
+ if (bmc150_accel_samp_freq_table[i].val == val &&
+ bmc150_accel_samp_freq_table[i].val2 == val2) {
+ ret = i2c_smbus_write_byte_data(
+ data->client,
+ BMC150_ACCEL_REG_PMU_BW,
+ bmc150_accel_samp_freq_table[i].bw_bits);
+ if (ret < 0)
+ return ret;
+
+ data->bw_bits =
+ bmc150_accel_samp_freq_table[i].bw_bits;
+ return 0;
+ }
+ }
+
+ return -EINVAL;
+}
+
+static int bmc150_accel_update_slope(struct bmc150_accel_data *data)
+{
+ int ret, val;
+
+ ret = i2c_smbus_write_byte_data(data->client, BMC150_ACCEL_REG_INT_6,
+ data->slope_thres);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error writing reg_int_6\n");
+ return ret;
+ }
+
+ ret = i2c_smbus_read_byte_data(data->client, BMC150_ACCEL_REG_INT_5);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_int_5\n");
+ return ret;
+ }
+
+ val = (ret & ~BMC150_ACCEL_SLOPE_DUR_MASK) | data->slope_dur;
+ ret = i2c_smbus_write_byte_data(data->client, BMC150_ACCEL_REG_INT_5,
+ val);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error write reg_int_5\n");
+ return ret;
+ }
+
+ dev_dbg(&data->client->dev, "%s: %x %x\n", __func__, data->slope_thres,
+ data->slope_dur);
+
+ return ret;
+}
+
+static int bmc150_accel_any_motion_setup(struct bmc150_accel_trigger *t,
+ bool state)
+{
+ if (state)
+ return bmc150_accel_update_slope(t->data);
+
+ return 0;
+}
+
+static int bmc150_accel_chip_init(struct bmc150_accel_data *data)
+{
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, BMC150_ACCEL_REG_CHIP_ID);
+ if (ret < 0) {
+ dev_err(&data->client->dev,
+ "Error: Reading chip id\n");
+ return ret;
+ }
+
+ dev_dbg(&data->client->dev, "Chip Id %x\n", ret);
+ if (ret != data->chip_info->chip_id) {
+ dev_err(&data->client->dev, "Invalid chip %x\n", ret);
+ return -ENODEV;
+ }
+
+ ret = bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_NORMAL, 0);
+ if (ret < 0)
+ return ret;
+
+ /* Set Bandwidth */
+ ret = bmc150_accel_set_bw(data, BMC150_ACCEL_DEF_BW, 0);
+ if (ret < 0)
+ return ret;
+
+ /* Set Default Range */
+ ret = i2c_smbus_write_byte_data(data->client,
+ BMC150_ACCEL_REG_PMU_RANGE,
+ BMC150_ACCEL_DEF_RANGE_4G);
+ if (ret < 0) {
+ dev_err(&data->client->dev,
+ "Error writing reg_pmu_range\n");
+ return ret;
+ }
+
+ data->range = BMC150_ACCEL_DEF_RANGE_4G;
+
+ /* Set default slope duration and thresholds */
+ data->slope_thres = BMC150_ACCEL_DEF_SLOPE_THRESHOLD;
+ data->slope_dur = BMC150_ACCEL_DEF_SLOPE_DURATION;
+ ret = bmc150_accel_update_slope(data);
+ if (ret < 0)
+ return ret;
+
+ /* Set default as latched interrupts */
+ ret = i2c_smbus_write_byte_data(data->client,
+ BMC150_ACCEL_REG_INT_RST_LATCH,
+ BMC150_ACCEL_INT_MODE_LATCH_INT |
+ BMC150_ACCEL_INT_MODE_LATCH_RESET);
+ if (ret < 0) {
+ dev_err(&data->client->dev,
+ "Error writing reg_int_rst_latch\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int bmc150_accel_get_bw(struct bmc150_accel_data *data, int *val,
+ int *val2)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(bmc150_accel_samp_freq_table); ++i) {
+ if (bmc150_accel_samp_freq_table[i].bw_bits == data->bw_bits) {
+ *val = bmc150_accel_samp_freq_table[i].val;
+ *val2 = bmc150_accel_samp_freq_table[i].val2;
+ return IIO_VAL_INT_PLUS_MICRO;
+ }
+ }
+
+ return -EINVAL;
+}
+
+#ifdef CONFIG_PM
+static int bmc150_accel_get_startup_times(struct bmc150_accel_data *data)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(bmc150_accel_sample_upd_time); ++i) {
+ if (bmc150_accel_sample_upd_time[i].bw_bits == data->bw_bits)
+ return bmc150_accel_sample_upd_time[i].msec;
+ }
+
+ return BMC150_ACCEL_MAX_STARTUP_TIME_MS;
+}
+
+static int bmc150_accel_set_power_state(struct bmc150_accel_data *data, bool on)
+{
+ int ret;
+
+ if (on)
+ ret = pm_runtime_get_sync(&data->client->dev);
+ else {
+ pm_runtime_mark_last_busy(&data->client->dev);
+ ret = pm_runtime_put_autosuspend(&data->client->dev);
+ }
+ if (ret < 0) {
+ dev_err(&data->client->dev,
+ "Failed: bmc150_accel_set_power_state for %d\n", on);
+ if (on)
+ pm_runtime_put_noidle(&data->client->dev);
+
+ return ret;
+ }
+
+ return 0;
+}
+#else
+static int bmc150_accel_set_power_state(struct bmc150_accel_data *data, bool on)
+{
+ return 0;
+}
+#endif
+
+static const struct bmc150_accel_interrupt_info {
+ u8 map_reg;
+ u8 map_bitmask;
+ u8 en_reg;
+ u8 en_bitmask;
+} bmc150_accel_interrupts[BMC150_ACCEL_INTERRUPTS] = {
+ { /* data ready interrupt */
+ .map_reg = BMC150_ACCEL_REG_INT_MAP_1,
+ .map_bitmask = BMC150_ACCEL_INT_MAP_1_BIT_DATA,
+ .en_reg = BMC150_ACCEL_REG_INT_EN_1,
+ .en_bitmask = BMC150_ACCEL_INT_EN_BIT_DATA_EN,
+ },
+ { /* motion interrupt */
+ .map_reg = BMC150_ACCEL_REG_INT_MAP_0,
+ .map_bitmask = BMC150_ACCEL_INT_MAP_0_BIT_SLOPE,
+ .en_reg = BMC150_ACCEL_REG_INT_EN_0,
+ .en_bitmask = BMC150_ACCEL_INT_EN_BIT_SLP_X |
+ BMC150_ACCEL_INT_EN_BIT_SLP_Y |
+ BMC150_ACCEL_INT_EN_BIT_SLP_Z
+ },
+ { /* fifo watermark interrupt */
+ .map_reg = BMC150_ACCEL_REG_INT_MAP_1,
+ .map_bitmask = BMC150_ACCEL_INT_MAP_1_BIT_FWM,
+ .en_reg = BMC150_ACCEL_REG_INT_EN_1,
+ .en_bitmask = BMC150_ACCEL_INT_EN_BIT_FWM_EN,
+ },
+};
+
+static void bmc150_accel_interrupts_setup(struct iio_dev *indio_dev,
+ struct bmc150_accel_data *data)
+{
+ int i;
+
+ for (i = 0; i < BMC150_ACCEL_INTERRUPTS; i++)
+ data->interrupts[i].info = &bmc150_accel_interrupts[i];
+}
+
+static int bmc150_accel_set_interrupt(struct bmc150_accel_data *data, int i,
+ bool state)
+{
+ struct bmc150_accel_interrupt *intr = &data->interrupts[i];
+ const struct bmc150_accel_interrupt_info *info = intr->info;
+ int ret;
+
+ if (state) {
+ if (atomic_inc_return(&intr->users) > 1)
+ return 0;
+ } else {
+ if (atomic_dec_return(&intr->users) > 0)
+ return 0;
+ }
+
+ /*
+ * We will expect the enable and disable to do operation in
+ * in reverse order. This will happen here anyway as our
+ * resume operation uses sync mode runtime pm calls, the
+ * suspend operation will be delayed by autosuspend delay
+ * So the disable operation will still happen in reverse of
+ * enable operation. When runtime pm is disabled the mode
+ * is always on so sequence doesn't matter
+ */
+ ret = bmc150_accel_set_power_state(data, state);
+ if (ret < 0)
+ return ret;
+
+ /* map the interrupt to the appropriate pins */
+ ret = i2c_smbus_read_byte_data(data->client, info->map_reg);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_int_map\n");
+ goto out_fix_power_state;
+ }
+ if (state)
+ ret |= info->map_bitmask;
+ else
+ ret &= ~info->map_bitmask;
+
+ ret = i2c_smbus_write_byte_data(data->client, info->map_reg,
+ ret);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error writing reg_int_map\n");
+ goto out_fix_power_state;
+ }
+
+ /* enable/disable the interrupt */
+ ret = i2c_smbus_read_byte_data(data->client, info->en_reg);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_int_en\n");
+ goto out_fix_power_state;
+ }
+
+ if (state)
+ ret |= info->en_bitmask;
+ else
+ ret &= ~info->en_bitmask;
+
+ ret = i2c_smbus_write_byte_data(data->client, info->en_reg, ret);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error writing reg_int_en\n");
+ goto out_fix_power_state;
+ }
+
+ if (state)
+ atomic_inc(&data->active_intr);
+ else
+ atomic_dec(&data->active_intr);
+
+ return 0;
+
+out_fix_power_state:
+ bmc150_accel_set_power_state(data, false);
+ return ret;
+}
+
+
+static int bmc150_accel_set_scale(struct bmc150_accel_data *data, int val)
+{
+ int ret, i;
+
+ for (i = 0; i < ARRAY_SIZE(data->chip_info->scale_table); ++i) {
+ if (data->chip_info->scale_table[i].scale == val) {
+ ret = i2c_smbus_write_byte_data(
+ data->client,
+ BMC150_ACCEL_REG_PMU_RANGE,
+ data->chip_info->scale_table[i].reg_range);
+ if (ret < 0) {
+ dev_err(&data->client->dev,
+ "Error writing pmu_range\n");
+ return ret;
+ }
+
+ data->range = data->chip_info->scale_table[i].reg_range;
+ return 0;
+ }
+ }
+
+ return -EINVAL;
+}
+
+static int bmc150_accel_get_temp(struct bmc150_accel_data *data, int *val)
+{
+ int ret;
+
+ mutex_lock(&data->mutex);
+
+ ret = i2c_smbus_read_byte_data(data->client, BMC150_ACCEL_REG_TEMP);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_temp\n");
+ mutex_unlock(&data->mutex);
+ return ret;
+ }
+ *val = sign_extend32(ret, 7);
+
+ mutex_unlock(&data->mutex);
+
+ return IIO_VAL_INT;
+}
+
+static int bmc150_accel_get_axis(struct bmc150_accel_data *data,
+ struct iio_chan_spec const *chan,
+ int *val)
+{
+ int ret;
+ int axis = chan->scan_index;
+
+ mutex_lock(&data->mutex);
+ ret = bmc150_accel_set_power_state(data, true);
+ if (ret < 0) {
+ mutex_unlock(&data->mutex);
+ return ret;
+ }
+
+ ret = i2c_smbus_read_word_data(data->client,
+ BMC150_ACCEL_AXIS_TO_REG(axis));
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading axis %d\n", axis);
+ bmc150_accel_set_power_state(data, false);
+ mutex_unlock(&data->mutex);
+ return ret;
+ }
+ *val = sign_extend32(ret >> chan->scan_type.shift,
+ chan->scan_type.realbits - 1);
+ ret = bmc150_accel_set_power_state(data, false);
+ mutex_unlock(&data->mutex);
+ if (ret < 0)
+ return ret;
+
+ return IIO_VAL_INT;
+}
+
+static int bmc150_accel_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct bmc150_accel_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ switch (chan->type) {
+ case IIO_TEMP:
+ return bmc150_accel_get_temp(data, val);
+ case IIO_ACCEL:
+ if (iio_buffer_enabled(indio_dev))
+ return -EBUSY;
+ else
+ return bmc150_accel_get_axis(data, chan, val);
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_OFFSET:
+ if (chan->type == IIO_TEMP) {
+ *val = BMC150_ACCEL_TEMP_CENTER_VAL;
+ return IIO_VAL_INT;
+ } else
+ return -EINVAL;
+ case IIO_CHAN_INFO_SCALE:
+ *val = 0;
+ switch (chan->type) {
+ case IIO_TEMP:
+ *val2 = 500000;
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_ACCEL:
+ {
+ int i;
+ const struct bmc150_scale_info *si;
+ int st_size = ARRAY_SIZE(data->chip_info->scale_table);
+
+ for (i = 0; i < st_size; ++i) {
+ si = &data->chip_info->scale_table[i];
+ if (si->reg_range == data->range) {
+ *val2 = si->scale;
+ return IIO_VAL_INT_PLUS_MICRO;
+ }
+ }
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ mutex_lock(&data->mutex);
+ ret = bmc150_accel_get_bw(data, val, val2);
+ mutex_unlock(&data->mutex);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int bmc150_accel_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct bmc150_accel_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ mutex_lock(&data->mutex);
+ ret = bmc150_accel_set_bw(data, val, val2);
+ mutex_unlock(&data->mutex);
+ break;
+ case IIO_CHAN_INFO_SCALE:
+ if (val)
+ return -EINVAL;
+
+ mutex_lock(&data->mutex);
+ ret = bmc150_accel_set_scale(data, val2);
+ mutex_unlock(&data->mutex);
+ return ret;
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static int bmc150_accel_read_event(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int *val, int *val2)
+{
+ struct bmc150_accel_data *data = iio_priv(indio_dev);
+
+ *val2 = 0;
+ switch (info) {
+ case IIO_EV_INFO_VALUE:
+ *val = data->slope_thres;
+ break;
+ case IIO_EV_INFO_PERIOD:
+ *val = data->slope_dur;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return IIO_VAL_INT;
+}
+
+static int bmc150_accel_write_event(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int val, int val2)
+{
+ struct bmc150_accel_data *data = iio_priv(indio_dev);
+
+ if (data->ev_enable_state)
+ return -EBUSY;
+
+ switch (info) {
+ case IIO_EV_INFO_VALUE:
+ data->slope_thres = val & 0xFF;
+ break;
+ case IIO_EV_INFO_PERIOD:
+ data->slope_dur = val & BMC150_ACCEL_SLOPE_DUR_MASK;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int bmc150_accel_read_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir)
+{
+
+ struct bmc150_accel_data *data = iio_priv(indio_dev);
+
+ return data->ev_enable_state;
+}
+
+static int bmc150_accel_write_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ int state)
+{
+ struct bmc150_accel_data *data = iio_priv(indio_dev);
+ int ret;
+
+ if (state == data->ev_enable_state)
+ return 0;
+
+ mutex_lock(&data->mutex);
+
+ ret = bmc150_accel_set_interrupt(data, BMC150_ACCEL_INT_ANY_MOTION,
+ state);
+ if (ret < 0) {
+ mutex_unlock(&data->mutex);
+ return ret;
+ }
+
+ data->ev_enable_state = state;
+ mutex_unlock(&data->mutex);
+
+ return 0;
+}
+
+static int bmc150_accel_validate_trigger(struct iio_dev *indio_dev,
+ struct iio_trigger *trig)
+{
+ struct bmc150_accel_data *data = iio_priv(indio_dev);
+ int i;
+
+ for (i = 0; i < BMC150_ACCEL_TRIGGERS; i++) {
+ if (data->triggers[i].indio_trig == trig)
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+static ssize_t bmc150_accel_get_fifo_watermark(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct bmc150_accel_data *data = iio_priv(indio_dev);
+ int wm;
+
+ mutex_lock(&data->mutex);
+ wm = data->watermark;
+ mutex_unlock(&data->mutex);
+
+ return sprintf(buf, "%d\n", wm);
+}
+
+static ssize_t bmc150_accel_get_fifo_state(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct bmc150_accel_data *data = iio_priv(indio_dev);
+ bool state;
+
+ mutex_lock(&data->mutex);
+ state = data->fifo_mode;
+ mutex_unlock(&data->mutex);
+
+ return sprintf(buf, "%d\n", state);
+}
+
+static IIO_CONST_ATTR(hwfifo_watermark_min, "1");
+static IIO_CONST_ATTR(hwfifo_watermark_max,
+ __stringify(BMC150_ACCEL_FIFO_LENGTH));
+static IIO_DEVICE_ATTR(hwfifo_enabled, S_IRUGO,
+ bmc150_accel_get_fifo_state, NULL, 0);
+static IIO_DEVICE_ATTR(hwfifo_watermark, S_IRUGO,
+ bmc150_accel_get_fifo_watermark, NULL, 0);
+
+static const struct attribute *bmc150_accel_fifo_attributes[] = {
+ &iio_const_attr_hwfifo_watermark_min.dev_attr.attr,
+ &iio_const_attr_hwfifo_watermark_max.dev_attr.attr,
+ &iio_dev_attr_hwfifo_watermark.dev_attr.attr,
+ &iio_dev_attr_hwfifo_enabled.dev_attr.attr,
+ NULL,
+};
+
+static int bmc150_accel_set_watermark(struct iio_dev *indio_dev, unsigned val)
+{
+ struct bmc150_accel_data *data = iio_priv(indio_dev);
+
+ if (val > BMC150_ACCEL_FIFO_LENGTH)
+ val = BMC150_ACCEL_FIFO_LENGTH;
+
+ mutex_lock(&data->mutex);
+ data->watermark = val;
+ mutex_unlock(&data->mutex);
+
+ return 0;
+}
+
+/*
+ * We must read at least one full frame in one burst, otherwise the rest of the
+ * frame data is discarded.
+ */
+static int bmc150_accel_fifo_transfer(const struct i2c_client *client,
+ char *buffer, int samples)
+{
+ int sample_length = 3 * 2;
+ u8 reg_fifo_data = BMC150_ACCEL_REG_FIFO_DATA;
+ int ret = -EIO;
+
+ if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+ struct i2c_msg msg[2] = {
+ {
+ .addr = client->addr,
+ .flags = 0,
+ .buf = &reg_fifo_data,
+ .len = sizeof(reg_fifo_data),
+ },
+ {
+ .addr = client->addr,
+ .flags = I2C_M_RD,
+ .buf = (u8 *)buffer,
+ .len = samples * sample_length,
+ }
+ };
+
+ ret = i2c_transfer(client->adapter, msg, 2);
+ if (ret != 2)
+ ret = -EIO;
+ else
+ ret = 0;
+ } else {
+ int i, step = I2C_SMBUS_BLOCK_MAX / sample_length;
+
+ for (i = 0; i < samples * sample_length; i += step) {
+ ret = i2c_smbus_read_i2c_block_data(client,
+ reg_fifo_data, step,
+ &buffer[i]);
+ if (ret != step) {
+ ret = -EIO;
+ break;
+ }
+
+ ret = 0;
+ }
+ }
+
+ if (ret)
+ dev_err(&client->dev, "Error transferring data from fifo\n");
+
+ return ret;
+}
+
+static int __bmc150_accel_fifo_flush(struct iio_dev *indio_dev,
+ unsigned samples, bool irq)
+{
+ struct bmc150_accel_data *data = iio_priv(indio_dev);
+ int ret, i;
+ u8 count;
+ u16 buffer[BMC150_ACCEL_FIFO_LENGTH * 3];
+ int64_t tstamp;
+ uint64_t sample_period;
+ ret = i2c_smbus_read_byte_data(data->client,
+ BMC150_ACCEL_REG_FIFO_STATUS);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_fifo_status\n");
+ return ret;
+ }
+
+ count = ret & 0x7F;
+
+ if (!count)
+ return 0;
+
+ /*
+ * If we getting called from IRQ handler we know the stored timestamp is
+ * fairly accurate for the last stored sample. Otherwise, if we are
+ * called as a result of a read operation from userspace and hence
+ * before the watermark interrupt was triggered, take a timestamp
+ * now. We can fall anywhere in between two samples so the error in this
+ * case is at most one sample period.
+ */
+ if (!irq) {
+ data->old_timestamp = data->timestamp;
+ data->timestamp = iio_get_time_ns();
+ }
+
+ /*
+ * Approximate timestamps for each of the sample based on the sampling
+ * frequency, timestamp for last sample and number of samples.
+ *
+ * Note that we can't use the current bandwidth settings to compute the
+ * sample period because the sample rate varies with the device
+ * (e.g. between 31.70ms to 32.20ms for a bandwidth of 15.63HZ). That
+ * small variation adds when we store a large number of samples and
+ * creates significant jitter between the last and first samples in
+ * different batches (e.g. 32ms vs 21ms).
+ *
+ * To avoid this issue we compute the actual sample period ourselves
+ * based on the timestamp delta between the last two flush operations.
+ */
+ sample_period = (data->timestamp - data->old_timestamp);
+ do_div(sample_period, count);
+ tstamp = data->timestamp - (count - 1) * sample_period;
+
+ if (samples && count > samples)
+ count = samples;
+
+ ret = bmc150_accel_fifo_transfer(data->client, (u8 *)buffer, count);
+ if (ret)
+ return ret;
+
+ /*
+ * Ideally we want the IIO core to handle the demux when running in fifo
+ * mode but not when running in triggered buffer mode. Unfortunately
+ * this does not seem to be possible, so stick with driver demux for
+ * now.
+ */
+ for (i = 0; i < count; i++) {
+ u16 sample[8];
+ int j, bit;
+
+ j = 0;
+ for_each_set_bit(bit, indio_dev->active_scan_mask,
+ indio_dev->masklength)
+ memcpy(&sample[j++], &buffer[i * 3 + bit], 2);
+
+ iio_push_to_buffers_with_timestamp(indio_dev, sample, tstamp);
+
+ tstamp += sample_period;
+ }
+
+ return count;
+}
+
+static int bmc150_accel_fifo_flush(struct iio_dev *indio_dev, unsigned samples)
+{
+ struct bmc150_accel_data *data = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&data->mutex);
+ ret = __bmc150_accel_fifo_flush(indio_dev, samples, false);
+ mutex_unlock(&data->mutex);
+
+ return ret;
+}
+
+static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(
+ "15.620000 31.260000 62.50000 125 250 500 1000 2000");
+
+static struct attribute *bmc150_accel_attributes[] = {
+ &iio_const_attr_sampling_frequency_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group bmc150_accel_attrs_group = {
+ .attrs = bmc150_accel_attributes,
+};
+
+static const struct iio_event_spec bmc150_accel_event = {
+ .type = IIO_EV_TYPE_ROC,
+ .dir = IIO_EV_DIR_EITHER,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE) |
+ BIT(IIO_EV_INFO_PERIOD)
+};
+
+#define BMC150_ACCEL_CHANNEL(_axis, bits) { \
+ .type = IIO_ACCEL, \
+ .modified = 1, \
+ .channel2 = IIO_MOD_##_axis, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
+ BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .scan_index = AXIS_##_axis, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = (bits), \
+ .storagebits = 16, \
+ .shift = 16 - (bits), \
+ }, \
+ .event_spec = &bmc150_accel_event, \
+ .num_event_specs = 1 \
+}
+
+#define BMC150_ACCEL_CHANNELS(bits) { \
+ { \
+ .type = IIO_TEMP, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_SCALE) | \
+ BIT(IIO_CHAN_INFO_OFFSET), \
+ .scan_index = -1, \
+ }, \
+ BMC150_ACCEL_CHANNEL(X, bits), \
+ BMC150_ACCEL_CHANNEL(Y, bits), \
+ BMC150_ACCEL_CHANNEL(Z, bits), \
+ IIO_CHAN_SOFT_TIMESTAMP(3), \
+}
+
+static const struct iio_chan_spec bma222e_accel_channels[] =
+ BMC150_ACCEL_CHANNELS(8);
+static const struct iio_chan_spec bma250e_accel_channels[] =
+ BMC150_ACCEL_CHANNELS(10);
+static const struct iio_chan_spec bmc150_accel_channels[] =
+ BMC150_ACCEL_CHANNELS(12);
+static const struct iio_chan_spec bma280_accel_channels[] =
+ BMC150_ACCEL_CHANNELS(14);
+
+enum {
+ bmc150,
+ bmi055,
+ bma255,
+ bma250e,
+ bma222e,
+ bma280,
+};
+
+static const struct bmc150_accel_chip_info bmc150_accel_chip_info_tbl[] = {
+ [bmc150] = {
+ .chip_id = 0xFA,
+ .channels = bmc150_accel_channels,
+ .num_channels = ARRAY_SIZE(bmc150_accel_channels),
+ .scale_table = { {9610, BMC150_ACCEL_DEF_RANGE_2G},
+ {19122, BMC150_ACCEL_DEF_RANGE_4G},
+ {38344, BMC150_ACCEL_DEF_RANGE_8G},
+ {76590, BMC150_ACCEL_DEF_RANGE_16G} },
+ },
+ [bmi055] = {
+ .chip_id = 0xFA,
+ .channels = bmc150_accel_channels,
+ .num_channels = ARRAY_SIZE(bmc150_accel_channels),
+ .scale_table = { {9610, BMC150_ACCEL_DEF_RANGE_2G},
+ {19122, BMC150_ACCEL_DEF_RANGE_4G},
+ {38344, BMC150_ACCEL_DEF_RANGE_8G},
+ {76590, BMC150_ACCEL_DEF_RANGE_16G} },
+ },
+ [bma255] = {
+ .chip_id = 0xFA,
+ .channels = bmc150_accel_channels,
+ .num_channels = ARRAY_SIZE(bmc150_accel_channels),
+ .scale_table = { {9610, BMC150_ACCEL_DEF_RANGE_2G},
+ {19122, BMC150_ACCEL_DEF_RANGE_4G},
+ {38344, BMC150_ACCEL_DEF_RANGE_8G},
+ {76590, BMC150_ACCEL_DEF_RANGE_16G} },
+ },
+ [bma250e] = {
+ .chip_id = 0xF9,
+ .channels = bma250e_accel_channels,
+ .num_channels = ARRAY_SIZE(bma250e_accel_channels),
+ .scale_table = { {38344, BMC150_ACCEL_DEF_RANGE_2G},
+ {76590, BMC150_ACCEL_DEF_RANGE_4G},
+ {153277, BMC150_ACCEL_DEF_RANGE_8G},
+ {306457, BMC150_ACCEL_DEF_RANGE_16G} },
+ },
+ [bma222e] = {
+ .chip_id = 0xF8,
+ .channels = bma222e_accel_channels,
+ .num_channels = ARRAY_SIZE(bma222e_accel_channels),
+ .scale_table = { {153277, BMC150_ACCEL_DEF_RANGE_2G},
+ {306457, BMC150_ACCEL_DEF_RANGE_4G},
+ {612915, BMC150_ACCEL_DEF_RANGE_8G},
+ {1225831, BMC150_ACCEL_DEF_RANGE_16G} },
+ },
+ [bma280] = {
+ .chip_id = 0xFB,
+ .channels = bma280_accel_channels,
+ .num_channels = ARRAY_SIZE(bma280_accel_channels),
+ .scale_table = { {2392, BMC150_ACCEL_DEF_RANGE_2G},
+ {4785, BMC150_ACCEL_DEF_RANGE_4G},
+ {9581, BMC150_ACCEL_DEF_RANGE_8G},
+ {19152, BMC150_ACCEL_DEF_RANGE_16G} },
+ },
+};
+
+static const struct iio_info bmc150_accel_info = {
+ .attrs = &bmc150_accel_attrs_group,
+ .read_raw = bmc150_accel_read_raw,
+ .write_raw = bmc150_accel_write_raw,
+ .read_event_value = bmc150_accel_read_event,
+ .write_event_value = bmc150_accel_write_event,
+ .write_event_config = bmc150_accel_write_event_config,
+ .read_event_config = bmc150_accel_read_event_config,
+ .validate_trigger = bmc150_accel_validate_trigger,
+ .driver_module = THIS_MODULE,
+};
+
+static const struct iio_info bmc150_accel_info_fifo = {
+ .attrs = &bmc150_accel_attrs_group,
+ .read_raw = bmc150_accel_read_raw,
+ .write_raw = bmc150_accel_write_raw,
+ .read_event_value = bmc150_accel_read_event,
+ .write_event_value = bmc150_accel_write_event,
+ .write_event_config = bmc150_accel_write_event_config,
+ .read_event_config = bmc150_accel_read_event_config,
+ .validate_trigger = bmc150_accel_validate_trigger,
+ .hwfifo_set_watermark = bmc150_accel_set_watermark,
+ .hwfifo_flush_to_buffer = bmc150_accel_fifo_flush,
+ .driver_module = THIS_MODULE,
+};
+
+static irqreturn_t bmc150_accel_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct bmc150_accel_data *data = iio_priv(indio_dev);
+ int bit, ret, i = 0;
+
+ mutex_lock(&data->mutex);
+ for_each_set_bit(bit, indio_dev->active_scan_mask,
+ indio_dev->masklength) {
+ ret = i2c_smbus_read_word_data(data->client,
+ BMC150_ACCEL_AXIS_TO_REG(bit));
+ if (ret < 0) {
+ mutex_unlock(&data->mutex);
+ goto err_read;
+ }
+ data->buffer[i++] = ret;
+ }
+ mutex_unlock(&data->mutex);
+
+ iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
+ data->timestamp);
+err_read:
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+}
+
+static int bmc150_accel_trig_try_reen(struct iio_trigger *trig)
+{
+ struct bmc150_accel_trigger *t = iio_trigger_get_drvdata(trig);
+ struct bmc150_accel_data *data = t->data;
+ int ret;
+
+ /* new data interrupts don't need ack */
+ if (t == &t->data->triggers[BMC150_ACCEL_TRIGGER_DATA_READY])
+ return 0;
+
+ mutex_lock(&data->mutex);
+ /* clear any latched interrupt */
+ ret = i2c_smbus_write_byte_data(data->client,
+ BMC150_ACCEL_REG_INT_RST_LATCH,
+ BMC150_ACCEL_INT_MODE_LATCH_INT |
+ BMC150_ACCEL_INT_MODE_LATCH_RESET);
+ mutex_unlock(&data->mutex);
+ if (ret < 0) {
+ dev_err(&data->client->dev,
+ "Error writing reg_int_rst_latch\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int bmc150_accel_trigger_set_state(struct iio_trigger *trig,
+ bool state)
+{
+ struct bmc150_accel_trigger *t = iio_trigger_get_drvdata(trig);
+ struct bmc150_accel_data *data = t->data;
+ int ret;
+
+ mutex_lock(&data->mutex);
+
+ if (t->enabled == state) {
+ mutex_unlock(&data->mutex);
+ return 0;
+ }
+
+ if (t->setup) {
+ ret = t->setup(t, state);
+ if (ret < 0) {
+ mutex_unlock(&data->mutex);
+ return ret;
+ }
+ }
+
+ ret = bmc150_accel_set_interrupt(data, t->intr, state);
+ if (ret < 0) {
+ mutex_unlock(&data->mutex);
+ return ret;
+ }
+
+ t->enabled = state;
+
+ mutex_unlock(&data->mutex);
+
+ return ret;
+}
+
+static const struct iio_trigger_ops bmc150_accel_trigger_ops = {
+ .set_trigger_state = bmc150_accel_trigger_set_state,
+ .try_reenable = bmc150_accel_trig_try_reen,
+ .owner = THIS_MODULE,
+};
+
+static int bmc150_accel_handle_roc_event(struct iio_dev *indio_dev)
+{
+ struct bmc150_accel_data *data = iio_priv(indio_dev);
+ int dir;
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(data->client,
+ BMC150_ACCEL_REG_INT_STATUS_2);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_int_status_2\n");
+ return ret;
+ }
+
+ if (ret & BMC150_ACCEL_ANY_MOTION_BIT_SIGN)
+ dir = IIO_EV_DIR_FALLING;
+ else
+ dir = IIO_EV_DIR_RISING;
+
+ if (ret & BMC150_ACCEL_ANY_MOTION_BIT_X)
+ iio_push_event(indio_dev, IIO_MOD_EVENT_CODE(IIO_ACCEL,
+ 0,
+ IIO_MOD_X,
+ IIO_EV_TYPE_ROC,
+ dir),
+ data->timestamp);
+ if (ret & BMC150_ACCEL_ANY_MOTION_BIT_Y)
+ iio_push_event(indio_dev, IIO_MOD_EVENT_CODE(IIO_ACCEL,
+ 0,
+ IIO_MOD_Y,
+ IIO_EV_TYPE_ROC,
+ dir),
+ data->timestamp);
+ if (ret & BMC150_ACCEL_ANY_MOTION_BIT_Z)
+ iio_push_event(indio_dev, IIO_MOD_EVENT_CODE(IIO_ACCEL,
+ 0,
+ IIO_MOD_Z,
+ IIO_EV_TYPE_ROC,
+ dir),
+ data->timestamp);
+ return ret;
+}
+
+static irqreturn_t bmc150_accel_irq_thread_handler(int irq, void *private)
+{
+ struct iio_dev *indio_dev = private;
+ struct bmc150_accel_data *data = iio_priv(indio_dev);
+ bool ack = false;
+ int ret;
+
+ mutex_lock(&data->mutex);
+
+ if (data->fifo_mode) {
+ ret = __bmc150_accel_fifo_flush(indio_dev,
+ BMC150_ACCEL_FIFO_LENGTH, true);
+ if (ret > 0)
+ ack = true;
+ }
+
+ if (data->ev_enable_state) {
+ ret = bmc150_accel_handle_roc_event(indio_dev);
+ if (ret > 0)
+ ack = true;
+ }
+
+ if (ack) {
+ ret = i2c_smbus_write_byte_data(data->client,
+ BMC150_ACCEL_REG_INT_RST_LATCH,
+ BMC150_ACCEL_INT_MODE_LATCH_INT |
+ BMC150_ACCEL_INT_MODE_LATCH_RESET);
+ if (ret)
+ dev_err(&data->client->dev, "Error writing reg_int_rst_latch\n");
+ ret = IRQ_HANDLED;
+ } else {
+ ret = IRQ_NONE;
+ }
+
+ mutex_unlock(&data->mutex);
+
+ return ret;
+}
+
+static irqreturn_t bmc150_accel_irq_handler(int irq, void *private)
+{
+ struct iio_dev *indio_dev = private;
+ struct bmc150_accel_data *data = iio_priv(indio_dev);
+ bool ack = false;
+ int i;
+
+ data->old_timestamp = data->timestamp;
+ data->timestamp = iio_get_time_ns();
+
+ for (i = 0; i < BMC150_ACCEL_TRIGGERS; i++) {
+ if (data->triggers[i].enabled) {
+ iio_trigger_poll(data->triggers[i].indio_trig);
+ ack = true;
+ break;
+ }
+ }
+
+ if (data->ev_enable_state || data->fifo_mode)
+ return IRQ_WAKE_THREAD;
+
+ if (ack)
+ return IRQ_HANDLED;
+
+ return IRQ_NONE;
+}
+
+static const char *bmc150_accel_match_acpi_device(struct device *dev, int *data)
+{
+ const struct acpi_device_id *id;
+
+ id = acpi_match_device(dev->driver->acpi_match_table, dev);
+
+ if (!id)
+ return NULL;
+
+ *data = (int) id->driver_data;
+
+ return dev_name(dev);
+}
+
+static int bmc150_accel_gpio_probe(struct i2c_client *client,
+ struct bmc150_accel_data *data)
+{
+ struct device *dev;
+ struct gpio_desc *gpio;
+ int ret;
+
+ if (!client)
+ return -EINVAL;
+
+ dev = &client->dev;
+
+ /* data ready gpio interrupt pin */
+ gpio = devm_gpiod_get_index(dev, BMC150_ACCEL_GPIO_NAME, 0, GPIOD_IN);
+ if (IS_ERR(gpio)) {
+ dev_err(dev, "Failed: gpio get index\n");
+ return PTR_ERR(gpio);
+ }
+
+ ret = gpiod_to_irq(gpio);
+
+ dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret);
+
+ return ret;
+}
+
+static const struct {
+ int intr;
+ const char *name;
+ int (*setup)(struct bmc150_accel_trigger *t, bool state);
+} bmc150_accel_triggers[BMC150_ACCEL_TRIGGERS] = {
+ {
+ .intr = 0,
+ .name = "%s-dev%d",
+ },
+ {
+ .intr = 1,
+ .name = "%s-any-motion-dev%d",
+ .setup = bmc150_accel_any_motion_setup,
+ },
+};
+
+static void bmc150_accel_unregister_triggers(struct bmc150_accel_data *data,
+ int from)
+{
+ int i;
+
+ for (i = from; i >= 0; i--) {
+ if (data->triggers[i].indio_trig) {
+ iio_trigger_unregister(data->triggers[i].indio_trig);
+ data->triggers[i].indio_trig = NULL;
+ }
+ }
+}
+
+static int bmc150_accel_triggers_setup(struct iio_dev *indio_dev,
+ struct bmc150_accel_data *data)
+{
+ int i, ret;
+
+ for (i = 0; i < BMC150_ACCEL_TRIGGERS; i++) {
+ struct bmc150_accel_trigger *t = &data->triggers[i];
+
+ t->indio_trig = devm_iio_trigger_alloc(&data->client->dev,
+ bmc150_accel_triggers[i].name,
+ indio_dev->name,
+ indio_dev->id);
+ if (!t->indio_trig) {
+ ret = -ENOMEM;
+ break;
+ }
+
+ t->indio_trig->dev.parent = &data->client->dev;
+ t->indio_trig->ops = &bmc150_accel_trigger_ops;
+ t->intr = bmc150_accel_triggers[i].intr;
+ t->data = data;
+ t->setup = bmc150_accel_triggers[i].setup;
+ iio_trigger_set_drvdata(t->indio_trig, t);
+
+ ret = iio_trigger_register(t->indio_trig);
+ if (ret)
+ break;
+ }
+
+ if (ret)
+ bmc150_accel_unregister_triggers(data, i - 1);
+
+ return ret;
+}
+
+#define BMC150_ACCEL_FIFO_MODE_STREAM 0x80
+#define BMC150_ACCEL_FIFO_MODE_FIFO 0x40
+#define BMC150_ACCEL_FIFO_MODE_BYPASS 0x00
+
+static int bmc150_accel_fifo_set_mode(struct bmc150_accel_data *data)
+{
+ u8 reg = BMC150_ACCEL_REG_FIFO_CONFIG1;
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(data->client, reg, data->fifo_mode);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error writing reg_fifo_config1\n");
+ return ret;
+ }
+
+ if (!data->fifo_mode)
+ return 0;
+
+ ret = i2c_smbus_write_byte_data(data->client,
+ BMC150_ACCEL_REG_FIFO_CONFIG0,
+ data->watermark);
+ if (ret < 0)
+ dev_err(&data->client->dev, "Error writing reg_fifo_config0\n");
+
+ return ret;
+}
+
+static int bmc150_accel_buffer_postenable(struct iio_dev *indio_dev)
+{
+ struct bmc150_accel_data *data = iio_priv(indio_dev);
+ int ret = 0;
+
+ if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED)
+ return iio_triggered_buffer_postenable(indio_dev);
+
+ mutex_lock(&data->mutex);
+
+ if (!data->watermark)
+ goto out;
+
+ ret = bmc150_accel_set_interrupt(data, BMC150_ACCEL_INT_WATERMARK,
+ true);
+ if (ret)
+ goto out;
+
+ data->fifo_mode = BMC150_ACCEL_FIFO_MODE_FIFO;
+
+ ret = bmc150_accel_fifo_set_mode(data);
+ if (ret) {
+ data->fifo_mode = 0;
+ bmc150_accel_set_interrupt(data, BMC150_ACCEL_INT_WATERMARK,
+ false);
+ }
+
+out:
+ mutex_unlock(&data->mutex);
+
+ return ret;
+}
+
+static int bmc150_accel_buffer_predisable(struct iio_dev *indio_dev)
+{
+ struct bmc150_accel_data *data = iio_priv(indio_dev);
+
+ if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED)
+ return iio_triggered_buffer_predisable(indio_dev);
+
+ mutex_lock(&data->mutex);
+
+ if (!data->fifo_mode)
+ goto out;
+
+ bmc150_accel_set_interrupt(data, BMC150_ACCEL_INT_WATERMARK, false);
+ __bmc150_accel_fifo_flush(indio_dev, BMC150_ACCEL_FIFO_LENGTH, false);
+ data->fifo_mode = 0;
+ bmc150_accel_fifo_set_mode(data);
+
+out:
+ mutex_unlock(&data->mutex);
+
+ return 0;
+}
+
+static const struct iio_buffer_setup_ops bmc150_accel_buffer_ops = {
+ .postenable = bmc150_accel_buffer_postenable,
+ .predisable = bmc150_accel_buffer_predisable,
+};
+
+static int bmc150_accel_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct bmc150_accel_data *data;
+ struct iio_dev *indio_dev;
+ int ret;
+ const char *name = NULL;
+ int chip_id = 0;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+
+ if (id) {
+ name = id->name;
+ chip_id = id->driver_data;
+ }
+
+ if (ACPI_HANDLE(&client->dev))
+ name = bmc150_accel_match_acpi_device(&client->dev, &chip_id);
+
+ data->chip_info = &bmc150_accel_chip_info_tbl[chip_id];
+
+ ret = bmc150_accel_chip_init(data);
+ if (ret < 0)
+ return ret;
+
+ mutex_init(&data->mutex);
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->channels = data->chip_info->channels;
+ indio_dev->num_channels = data->chip_info->num_channels;
+ indio_dev->name = name;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->info = &bmc150_accel_info;
+
+ if (client->irq < 0)
+ client->irq = bmc150_accel_gpio_probe(client, data);
+
+ if (client->irq >= 0) {
+ ret = devm_request_threaded_irq(
+ &client->dev, client->irq,
+ bmc150_accel_irq_handler,
+ bmc150_accel_irq_thread_handler,
+ IRQF_TRIGGER_RISING,
+ BMC150_ACCEL_IRQ_NAME,
+ indio_dev);
+ if (ret)
+ return ret;
+
+ /*
+ * Set latched mode interrupt. While certain interrupts are
+ * non-latched regardless of this settings (e.g. new data) we
+ * want to use latch mode when we can to prevent interrupt
+ * flooding.
+ */
+ ret = i2c_smbus_write_byte_data(data->client,
+ BMC150_ACCEL_REG_INT_RST_LATCH,
+ BMC150_ACCEL_INT_MODE_LATCH_RESET);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error writing reg_int_rst_latch\n");
+ return ret;
+ }
+
+ bmc150_accel_interrupts_setup(indio_dev, data);
+
+ ret = bmc150_accel_triggers_setup(indio_dev, data);
+ if (ret)
+ return ret;
+
+ ret = iio_triggered_buffer_setup(indio_dev,
+ &iio_pollfunc_store_time,
+ bmc150_accel_trigger_handler,
+ &bmc150_accel_buffer_ops);
+ if (ret < 0) {
+ dev_err(&client->dev,
+ "Failed: iio triggered buffer setup\n");
+ goto err_trigger_unregister;
+ }
+
+ if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) ||
+ i2c_check_functionality(client->adapter,
+ I2C_FUNC_SMBUS_READ_I2C_BLOCK)) {
+ indio_dev->modes |= INDIO_BUFFER_SOFTWARE;
+ indio_dev->info = &bmc150_accel_info_fifo;
+ indio_dev->buffer->attrs = bmc150_accel_fifo_attributes;
+ }
+ }
+
+ ret = iio_device_register(indio_dev);
+ if (ret < 0) {
+ dev_err(&client->dev, "Unable to register iio device\n");
+ goto err_buffer_cleanup;
+ }
+
+ ret = pm_runtime_set_active(&client->dev);
+ if (ret)
+ goto err_iio_unregister;
+
+ pm_runtime_enable(&client->dev);
+ pm_runtime_set_autosuspend_delay(&client->dev,
+ BMC150_AUTO_SUSPEND_DELAY_MS);
+ pm_runtime_use_autosuspend(&client->dev);
+
+ return 0;
+
+err_iio_unregister:
+ iio_device_unregister(indio_dev);
+err_buffer_cleanup:
+ if (indio_dev->pollfunc)
+ iio_triggered_buffer_cleanup(indio_dev);
+err_trigger_unregister:
+ bmc150_accel_unregister_triggers(data, BMC150_ACCEL_TRIGGERS - 1);
+
+ return ret;
+}
+
+static int bmc150_accel_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct bmc150_accel_data *data = iio_priv(indio_dev);
+
+ pm_runtime_disable(&client->dev);
+ pm_runtime_set_suspended(&client->dev);
+ pm_runtime_put_noidle(&client->dev);
+
+ iio_device_unregister(indio_dev);
+
+ bmc150_accel_unregister_triggers(data, BMC150_ACCEL_TRIGGERS - 1);
+
+ mutex_lock(&data->mutex);
+ bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_DEEP_SUSPEND, 0);
+ mutex_unlock(&data->mutex);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int bmc150_accel_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct bmc150_accel_data *data = iio_priv(indio_dev);
+
+ mutex_lock(&data->mutex);
+ bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_SUSPEND, 0);
+ mutex_unlock(&data->mutex);
+
+ return 0;
+}
+
+static int bmc150_accel_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct bmc150_accel_data *data = iio_priv(indio_dev);
+
+ mutex_lock(&data->mutex);
+ if (atomic_read(&data->active_intr))
+ bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_NORMAL, 0);
+ bmc150_accel_fifo_set_mode(data);
+ mutex_unlock(&data->mutex);
+
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_PM
+static int bmc150_accel_runtime_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct bmc150_accel_data *data = iio_priv(indio_dev);
+ int ret;
+
+ dev_dbg(&data->client->dev, __func__);
+ ret = bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_SUSPEND, 0);
+ if (ret < 0)
+ return -EAGAIN;
+
+ return 0;
+}
+
+static int bmc150_accel_runtime_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct bmc150_accel_data *data = iio_priv(indio_dev);
+ int ret;
+ int sleep_val;
+
+ dev_dbg(&data->client->dev, __func__);
+
+ ret = bmc150_accel_set_mode(data, BMC150_ACCEL_SLEEP_MODE_NORMAL, 0);
+ if (ret < 0)
+ return ret;
+ ret = bmc150_accel_fifo_set_mode(data);
+ if (ret < 0)
+ return ret;
+
+ sleep_val = bmc150_accel_get_startup_times(data);
+ if (sleep_val < 20)
+ usleep_range(sleep_val * 1000, 20000);
+ else
+ msleep_interruptible(sleep_val);
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops bmc150_accel_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(bmc150_accel_suspend, bmc150_accel_resume)
+ SET_RUNTIME_PM_OPS(bmc150_accel_runtime_suspend,
+ bmc150_accel_runtime_resume, NULL)
+};
+
+static const struct acpi_device_id bmc150_accel_acpi_match[] = {
+ {"BSBA0150", bmc150},
+ {"BMC150A", bmc150},
+ {"BMI055A", bmi055},
+ {"BMA0255", bma255},
+ {"BMA250E", bma250e},
+ {"BMA222E", bma222e},
+ {"BMA0280", bma280},
+ { },
+};
+MODULE_DEVICE_TABLE(acpi, bmc150_accel_acpi_match);
+
+static const struct i2c_device_id bmc150_accel_id[] = {
+ {"bmc150_accel", bmc150},
+ {"bmi055_accel", bmi055},
+ {"bma255", bma255},
+ {"bma250e", bma250e},
+ {"bma222e", bma222e},
+ {"bma280", bma280},
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, bmc150_accel_id);
+
+static struct i2c_driver bmc150_accel_driver = {
+ .driver = {
+ .name = BMC150_ACCEL_DRV_NAME,
+ .acpi_match_table = ACPI_PTR(bmc150_accel_acpi_match),
+ .pm = &bmc150_accel_pm_ops,
+ },
+ .probe = bmc150_accel_probe,
+ .remove = bmc150_accel_remove,
+ .id_table = bmc150_accel_id,
+};
+module_i2c_driver(bmc150_accel_driver);
+
+MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("BMC150 accelerometer driver");
diff --git a/drivers/iio/accel/hid-sensor-accel-3d.c b/drivers/iio/accel/hid-sensor-accel-3d.c
new file mode 100644
index 000000000..2b4fad699
--- /dev/null
+++ b/drivers/iio/accel/hid-sensor-accel-3d.c
@@ -0,0 +1,425 @@
+/*
+ * HID Sensors Driver
+ * Copyright (c) 2012, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/hid-sensor-hub.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+#include "../common/hid-sensors/hid-sensor-trigger.h"
+
+enum accel_3d_channel {
+ CHANNEL_SCAN_INDEX_X,
+ CHANNEL_SCAN_INDEX_Y,
+ CHANNEL_SCAN_INDEX_Z,
+ ACCEL_3D_CHANNEL_MAX,
+};
+
+struct accel_3d_state {
+ struct hid_sensor_hub_callbacks callbacks;
+ struct hid_sensor_common common_attributes;
+ struct hid_sensor_hub_attribute_info accel[ACCEL_3D_CHANNEL_MAX];
+ u32 accel_val[ACCEL_3D_CHANNEL_MAX];
+ int scale_pre_decml;
+ int scale_post_decml;
+ int scale_precision;
+ int value_offset;
+};
+
+static const u32 accel_3d_addresses[ACCEL_3D_CHANNEL_MAX] = {
+ HID_USAGE_SENSOR_ACCEL_X_AXIS,
+ HID_USAGE_SENSOR_ACCEL_Y_AXIS,
+ HID_USAGE_SENSOR_ACCEL_Z_AXIS
+};
+
+/* Channel definitions */
+static const struct iio_chan_spec accel_3d_channels[] = {
+ {
+ .type = IIO_ACCEL,
+ .modified = 1,
+ .channel2 = IIO_MOD_X,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_SAMP_FREQ) |
+ BIT(IIO_CHAN_INFO_HYSTERESIS),
+ .scan_index = CHANNEL_SCAN_INDEX_X,
+ }, {
+ .type = IIO_ACCEL,
+ .modified = 1,
+ .channel2 = IIO_MOD_Y,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_SAMP_FREQ) |
+ BIT(IIO_CHAN_INFO_HYSTERESIS),
+ .scan_index = CHANNEL_SCAN_INDEX_Y,
+ }, {
+ .type = IIO_ACCEL,
+ .modified = 1,
+ .channel2 = IIO_MOD_Z,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_SAMP_FREQ) |
+ BIT(IIO_CHAN_INFO_HYSTERESIS),
+ .scan_index = CHANNEL_SCAN_INDEX_Z,
+ }
+};
+
+/* Adjust channel real bits based on report descriptor */
+static void accel_3d_adjust_channel_bit_mask(struct iio_chan_spec *channels,
+ int channel, int size)
+{
+ channels[channel].scan_type.sign = 's';
+ /* Real storage bits will change based on the report desc. */
+ channels[channel].scan_type.realbits = size * 8;
+ /* Maximum size of a sample to capture is u32 */
+ channels[channel].scan_type.storagebits = sizeof(u32) * 8;
+}
+
+/* Channel read_raw handler */
+static int accel_3d_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2,
+ long mask)
+{
+ struct accel_3d_state *accel_state = iio_priv(indio_dev);
+ int report_id = -1;
+ u32 address;
+ int ret_type;
+
+ *val = 0;
+ *val2 = 0;
+ switch (mask) {
+ case 0:
+ hid_sensor_power_state(&accel_state->common_attributes, true);
+ report_id = accel_state->accel[chan->scan_index].report_id;
+ address = accel_3d_addresses[chan->scan_index];
+ if (report_id >= 0)
+ *val = sensor_hub_input_attr_get_raw_value(
+ accel_state->common_attributes.hsdev,
+ HID_USAGE_SENSOR_ACCEL_3D, address,
+ report_id,
+ SENSOR_HUB_SYNC);
+ else {
+ *val = 0;
+ hid_sensor_power_state(&accel_state->common_attributes,
+ false);
+ return -EINVAL;
+ }
+ hid_sensor_power_state(&accel_state->common_attributes, false);
+ ret_type = IIO_VAL_INT;
+ break;
+ case IIO_CHAN_INFO_SCALE:
+ *val = accel_state->scale_pre_decml;
+ *val2 = accel_state->scale_post_decml;
+ ret_type = accel_state->scale_precision;
+ break;
+ case IIO_CHAN_INFO_OFFSET:
+ *val = accel_state->value_offset;
+ ret_type = IIO_VAL_INT;
+ break;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ ret_type = hid_sensor_read_samp_freq_value(
+ &accel_state->common_attributes, val, val2);
+ break;
+ case IIO_CHAN_INFO_HYSTERESIS:
+ ret_type = hid_sensor_read_raw_hyst_value(
+ &accel_state->common_attributes, val, val2);
+ break;
+ default:
+ ret_type = -EINVAL;
+ break;
+ }
+
+ return ret_type;
+}
+
+/* Channel write_raw handler */
+static int accel_3d_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val,
+ int val2,
+ long mask)
+{
+ struct accel_3d_state *accel_state = iio_priv(indio_dev);
+ int ret = 0;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ ret = hid_sensor_write_samp_freq_value(
+ &accel_state->common_attributes, val, val2);
+ break;
+ case IIO_CHAN_INFO_HYSTERESIS:
+ ret = hid_sensor_write_raw_hyst_value(
+ &accel_state->common_attributes, val, val2);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static const struct iio_info accel_3d_info = {
+ .driver_module = THIS_MODULE,
+ .read_raw = &accel_3d_read_raw,
+ .write_raw = &accel_3d_write_raw,
+};
+
+/* Function to push data to buffer */
+static void hid_sensor_push_data(struct iio_dev *indio_dev, const void *data,
+ int len)
+{
+ dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
+ iio_push_to_buffers(indio_dev, data);
+}
+
+/* Callback handler to send event after all samples are received and captured */
+static int accel_3d_proc_event(struct hid_sensor_hub_device *hsdev,
+ unsigned usage_id,
+ void *priv)
+{
+ struct iio_dev *indio_dev = platform_get_drvdata(priv);
+ struct accel_3d_state *accel_state = iio_priv(indio_dev);
+
+ dev_dbg(&indio_dev->dev, "accel_3d_proc_event\n");
+ if (atomic_read(&accel_state->common_attributes.data_ready))
+ hid_sensor_push_data(indio_dev,
+ accel_state->accel_val,
+ sizeof(accel_state->accel_val));
+
+ return 0;
+}
+
+/* Capture samples in local storage */
+static int accel_3d_capture_sample(struct hid_sensor_hub_device *hsdev,
+ unsigned usage_id,
+ size_t raw_len, char *raw_data,
+ void *priv)
+{
+ struct iio_dev *indio_dev = platform_get_drvdata(priv);
+ struct accel_3d_state *accel_state = iio_priv(indio_dev);
+ int offset;
+ int ret = -EINVAL;
+
+ switch (usage_id) {
+ case HID_USAGE_SENSOR_ACCEL_X_AXIS:
+ case HID_USAGE_SENSOR_ACCEL_Y_AXIS:
+ case HID_USAGE_SENSOR_ACCEL_Z_AXIS:
+ offset = usage_id - HID_USAGE_SENSOR_ACCEL_X_AXIS;
+ accel_state->accel_val[CHANNEL_SCAN_INDEX_X + offset] =
+ *(u32 *)raw_data;
+ ret = 0;
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+/* Parse report which is specific to an usage id*/
+static int accel_3d_parse_report(struct platform_device *pdev,
+ struct hid_sensor_hub_device *hsdev,
+ struct iio_chan_spec *channels,
+ unsigned usage_id,
+ struct accel_3d_state *st)
+{
+ int ret;
+ int i;
+
+ for (i = 0; i <= CHANNEL_SCAN_INDEX_Z; ++i) {
+ ret = sensor_hub_input_get_attribute_info(hsdev,
+ HID_INPUT_REPORT,
+ usage_id,
+ HID_USAGE_SENSOR_ACCEL_X_AXIS + i,
+ &st->accel[CHANNEL_SCAN_INDEX_X + i]);
+ if (ret < 0)
+ break;
+ accel_3d_adjust_channel_bit_mask(channels,
+ CHANNEL_SCAN_INDEX_X + i,
+ st->accel[CHANNEL_SCAN_INDEX_X + i].size);
+ }
+ dev_dbg(&pdev->dev, "accel_3d %x:%x, %x:%x, %x:%x\n",
+ st->accel[0].index,
+ st->accel[0].report_id,
+ st->accel[1].index, st->accel[1].report_id,
+ st->accel[2].index, st->accel[2].report_id);
+
+ st->scale_precision = hid_sensor_format_scale(
+ HID_USAGE_SENSOR_ACCEL_3D,
+ &st->accel[CHANNEL_SCAN_INDEX_X],
+ &st->scale_pre_decml, &st->scale_post_decml);
+
+ /* Set Sensitivity field ids, when there is no individual modifier */
+ if (st->common_attributes.sensitivity.index < 0) {
+ sensor_hub_input_get_attribute_info(hsdev,
+ HID_FEATURE_REPORT, usage_id,
+ HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
+ HID_USAGE_SENSOR_DATA_ACCELERATION,
+ &st->common_attributes.sensitivity);
+ dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
+ st->common_attributes.sensitivity.index,
+ st->common_attributes.sensitivity.report_id);
+ }
+
+ return ret;
+}
+
+/* Function to initialize the processing for usage id */
+static int hid_accel_3d_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+ static const char *name = "accel_3d";
+ struct iio_dev *indio_dev;
+ struct accel_3d_state *accel_state;
+ struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
+ struct iio_chan_spec *channels;
+
+ indio_dev = devm_iio_device_alloc(&pdev->dev,
+ sizeof(struct accel_3d_state));
+ if (indio_dev == NULL)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, indio_dev);
+
+ accel_state = iio_priv(indio_dev);
+ accel_state->common_attributes.hsdev = hsdev;
+ accel_state->common_attributes.pdev = pdev;
+
+ ret = hid_sensor_parse_common_attributes(hsdev,
+ HID_USAGE_SENSOR_ACCEL_3D,
+ &accel_state->common_attributes);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to setup common attributes\n");
+ return ret;
+ }
+
+ channels = kmemdup(accel_3d_channels, sizeof(accel_3d_channels),
+ GFP_KERNEL);
+ if (!channels) {
+ dev_err(&pdev->dev, "failed to duplicate channels\n");
+ return -ENOMEM;
+ }
+
+ ret = accel_3d_parse_report(pdev, hsdev, channels,
+ HID_USAGE_SENSOR_ACCEL_3D, accel_state);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to setup attributes\n");
+ goto error_free_dev_mem;
+ }
+
+ indio_dev->channels = channels;
+ indio_dev->num_channels = ARRAY_SIZE(accel_3d_channels);
+ indio_dev->dev.parent = &pdev->dev;
+ indio_dev->info = &accel_3d_info;
+ indio_dev->name = name;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
+ NULL, NULL);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
+ goto error_free_dev_mem;
+ }
+ atomic_set(&accel_state->common_attributes.data_ready, 0);
+ ret = hid_sensor_setup_trigger(indio_dev, name,
+ &accel_state->common_attributes);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "trigger setup failed\n");
+ goto error_unreg_buffer_funcs;
+ }
+
+ ret = iio_device_register(indio_dev);
+ if (ret) {
+ dev_err(&pdev->dev, "device register failed\n");
+ goto error_remove_trigger;
+ }
+
+ accel_state->callbacks.send_event = accel_3d_proc_event;
+ accel_state->callbacks.capture_sample = accel_3d_capture_sample;
+ accel_state->callbacks.pdev = pdev;
+ ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_ACCEL_3D,
+ &accel_state->callbacks);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "callback reg failed\n");
+ goto error_iio_unreg;
+ }
+
+ return ret;
+
+error_iio_unreg:
+ iio_device_unregister(indio_dev);
+error_remove_trigger:
+ hid_sensor_remove_trigger(&accel_state->common_attributes);
+error_unreg_buffer_funcs:
+ iio_triggered_buffer_cleanup(indio_dev);
+error_free_dev_mem:
+ kfree(indio_dev->channels);
+ return ret;
+}
+
+/* Function to deinitialize the processing for usage id */
+static int hid_accel_3d_remove(struct platform_device *pdev)
+{
+ struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
+ struct iio_dev *indio_dev = platform_get_drvdata(pdev);
+ struct accel_3d_state *accel_state = iio_priv(indio_dev);
+
+ sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_ACCEL_3D);
+ iio_device_unregister(indio_dev);
+ hid_sensor_remove_trigger(&accel_state->common_attributes);
+ iio_triggered_buffer_cleanup(indio_dev);
+ kfree(indio_dev->channels);
+
+ return 0;
+}
+
+static struct platform_device_id hid_accel_3d_ids[] = {
+ {
+ /* Format: HID-SENSOR-usage_id_in_hex_lowercase */
+ .name = "HID-SENSOR-200073",
+ },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, hid_accel_3d_ids);
+
+static struct platform_driver hid_accel_3d_platform_driver = {
+ .id_table = hid_accel_3d_ids,
+ .driver = {
+ .name = KBUILD_MODNAME,
+ .pm = &hid_sensor_pm_ops,
+ },
+ .probe = hid_accel_3d_probe,
+ .remove = hid_accel_3d_remove,
+};
+module_platform_driver(hid_accel_3d_platform_driver);
+
+MODULE_DESCRIPTION("HID Sensor Accel 3D");
+MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/accel/kxcjk-1013.c b/drivers/iio/accel/kxcjk-1013.c
new file mode 100644
index 000000000..5b7a860df
--- /dev/null
+++ b/drivers/iio/accel/kxcjk-1013.c
@@ -0,0 +1,1452 @@
+/*
+ * KXCJK-1013 3-axis accelerometer driver
+ * Copyright (c) 2014, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/bitops.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/acpi.h>
+#include <linux/gpio/consumer.h>
+#include <linux/pm.h>
+#include <linux/pm_runtime.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/events.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/iio/accel/kxcjk_1013.h>
+
+#define KXCJK1013_DRV_NAME "kxcjk1013"
+#define KXCJK1013_IRQ_NAME "kxcjk1013_event"
+
+#define KXCJK1013_REG_XOUT_L 0x06
+/*
+ * From low byte X axis register, all the other addresses of Y and Z can be
+ * obtained by just applying axis offset. The following axis defines are just
+ * provide clarity, but not used.
+ */
+#define KXCJK1013_REG_XOUT_H 0x07
+#define KXCJK1013_REG_YOUT_L 0x08
+#define KXCJK1013_REG_YOUT_H 0x09
+#define KXCJK1013_REG_ZOUT_L 0x0A
+#define KXCJK1013_REG_ZOUT_H 0x0B
+
+#define KXCJK1013_REG_DCST_RESP 0x0C
+#define KXCJK1013_REG_WHO_AM_I 0x0F
+#define KXCJK1013_REG_INT_SRC1 0x16
+#define KXCJK1013_REG_INT_SRC2 0x17
+#define KXCJK1013_REG_STATUS_REG 0x18
+#define KXCJK1013_REG_INT_REL 0x1A
+#define KXCJK1013_REG_CTRL1 0x1B
+#define KXCJK1013_REG_CTRL2 0x1D
+#define KXCJK1013_REG_INT_CTRL1 0x1E
+#define KXCJK1013_REG_INT_CTRL2 0x1F
+#define KXCJK1013_REG_DATA_CTRL 0x21
+#define KXCJK1013_REG_WAKE_TIMER 0x29
+#define KXCJK1013_REG_SELF_TEST 0x3A
+#define KXCJK1013_REG_WAKE_THRES 0x6A
+
+#define KXCJK1013_REG_CTRL1_BIT_PC1 BIT(7)
+#define KXCJK1013_REG_CTRL1_BIT_RES BIT(6)
+#define KXCJK1013_REG_CTRL1_BIT_DRDY BIT(5)
+#define KXCJK1013_REG_CTRL1_BIT_GSEL1 BIT(4)
+#define KXCJK1013_REG_CTRL1_BIT_GSEL0 BIT(3)
+#define KXCJK1013_REG_CTRL1_BIT_WUFE BIT(1)
+#define KXCJK1013_REG_INT_REG1_BIT_IEA BIT(4)
+#define KXCJK1013_REG_INT_REG1_BIT_IEN BIT(5)
+
+#define KXCJK1013_DATA_MASK_12_BIT 0x0FFF
+#define KXCJK1013_MAX_STARTUP_TIME_US 100000
+
+#define KXCJK1013_SLEEP_DELAY_MS 2000
+
+#define KXCJK1013_REG_INT_SRC2_BIT_ZP BIT(0)
+#define KXCJK1013_REG_INT_SRC2_BIT_ZN BIT(1)
+#define KXCJK1013_REG_INT_SRC2_BIT_YP BIT(2)
+#define KXCJK1013_REG_INT_SRC2_BIT_YN BIT(3)
+#define KXCJK1013_REG_INT_SRC2_BIT_XP BIT(4)
+#define KXCJK1013_REG_INT_SRC2_BIT_XN BIT(5)
+
+#define KXCJK1013_DEFAULT_WAKE_THRES 1
+
+enum kx_chipset {
+ KXCJK1013,
+ KXCJ91008,
+ KXTJ21009,
+ KX_MAX_CHIPS /* this must be last */
+};
+
+struct kxcjk1013_data {
+ struct i2c_client *client;
+ struct iio_trigger *dready_trig;
+ struct iio_trigger *motion_trig;
+ struct mutex mutex;
+ s16 buffer[8];
+ u8 odr_bits;
+ u8 range;
+ int wake_thres;
+ int wake_dur;
+ bool active_high_intr;
+ bool dready_trigger_on;
+ int ev_enable_state;
+ bool motion_trigger_on;
+ int64_t timestamp;
+ enum kx_chipset chipset;
+ bool is_smo8500_device;
+};
+
+enum kxcjk1013_axis {
+ AXIS_X,
+ AXIS_Y,
+ AXIS_Z,
+};
+
+enum kxcjk1013_mode {
+ STANDBY,
+ OPERATION,
+};
+
+enum kxcjk1013_range {
+ KXCJK1013_RANGE_2G,
+ KXCJK1013_RANGE_4G,
+ KXCJK1013_RANGE_8G,
+};
+
+static const struct {
+ int val;
+ int val2;
+ int odr_bits;
+} samp_freq_table[] = { {0, 781000, 0x08}, {1, 563000, 0x09},
+ {3, 125000, 0x0A}, {6, 250000, 0x0B}, {12, 500000, 0},
+ {25, 0, 0x01}, {50, 0, 0x02}, {100, 0, 0x03},
+ {200, 0, 0x04}, {400, 0, 0x05}, {800, 0, 0x06},
+ {1600, 0, 0x07} };
+
+/* Refer to section 4 of the specification */
+static const struct {
+ int odr_bits;
+ int usec;
+} odr_start_up_times[KX_MAX_CHIPS][12] = {
+ /* KXCJK-1013 */
+ {
+ {0x08, 100000},
+ {0x09, 100000},
+ {0x0A, 100000},
+ {0x0B, 100000},
+ {0, 80000},
+ {0x01, 41000},
+ {0x02, 21000},
+ {0x03, 11000},
+ {0x04, 6400},
+ {0x05, 3900},
+ {0x06, 2700},
+ {0x07, 2100},
+ },
+ /* KXCJ9-1008 */
+ {
+ {0x08, 100000},
+ {0x09, 100000},
+ {0x0A, 100000},
+ {0x0B, 100000},
+ {0, 80000},
+ {0x01, 41000},
+ {0x02, 21000},
+ {0x03, 11000},
+ {0x04, 6400},
+ {0x05, 3900},
+ {0x06, 2700},
+ {0x07, 2100},
+ },
+ /* KXCTJ2-1009 */
+ {
+ {0x08, 1240000},
+ {0x09, 621000},
+ {0x0A, 309000},
+ {0x0B, 151000},
+ {0, 80000},
+ {0x01, 41000},
+ {0x02, 21000},
+ {0x03, 11000},
+ {0x04, 6000},
+ {0x05, 4000},
+ {0x06, 3000},
+ {0x07, 2000},
+ },
+};
+
+static const struct {
+ u16 scale;
+ u8 gsel_0;
+ u8 gsel_1;
+} KXCJK1013_scale_table[] = { {9582, 0, 0},
+ {19163, 1, 0},
+ {38326, 0, 1} };
+
+static const struct {
+ int val;
+ int val2;
+ int odr_bits;
+} wake_odr_data_rate_table[] = { {0, 781000, 0x00},
+ {1, 563000, 0x01},
+ {3, 125000, 0x02},
+ {6, 250000, 0x03},
+ {12, 500000, 0x04},
+ {25, 0, 0x05},
+ {50, 0, 0x06},
+ {100, 0, 0x06},
+ {200, 0, 0x06},
+ {400, 0, 0x06},
+ {800, 0, 0x06},
+ {1600, 0, 0x06} };
+
+static int kxcjk1013_set_mode(struct kxcjk1013_data *data,
+ enum kxcjk1013_mode mode)
+{
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
+ return ret;
+ }
+
+ if (mode == STANDBY)
+ ret &= ~KXCJK1013_REG_CTRL1_BIT_PC1;
+ else
+ ret |= KXCJK1013_REG_CTRL1_BIT_PC1;
+
+ ret = i2c_smbus_write_byte_data(data->client,
+ KXCJK1013_REG_CTRL1, ret);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int kxcjk1013_get_mode(struct kxcjk1013_data *data,
+ enum kxcjk1013_mode *mode)
+{
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
+ return ret;
+ }
+
+ if (ret & KXCJK1013_REG_CTRL1_BIT_PC1)
+ *mode = OPERATION;
+ else
+ *mode = STANDBY;
+
+ return 0;
+}
+
+static int kxcjk1013_set_range(struct kxcjk1013_data *data, int range_index)
+{
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
+ return ret;
+ }
+
+ ret &= ~(KXCJK1013_REG_CTRL1_BIT_GSEL0 |
+ KXCJK1013_REG_CTRL1_BIT_GSEL1);
+ ret |= (KXCJK1013_scale_table[range_index].gsel_0 << 3);
+ ret |= (KXCJK1013_scale_table[range_index].gsel_1 << 4);
+
+ ret = i2c_smbus_write_byte_data(data->client,
+ KXCJK1013_REG_CTRL1,
+ ret);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
+ return ret;
+ }
+
+ data->range = range_index;
+
+ return 0;
+}
+
+static int kxcjk1013_chip_init(struct kxcjk1013_data *data)
+{
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_WHO_AM_I);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading who_am_i\n");
+ return ret;
+ }
+
+ dev_dbg(&data->client->dev, "KXCJK1013 Chip Id %x\n", ret);
+
+ ret = kxcjk1013_set_mode(data, STANDBY);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
+ return ret;
+ }
+
+ /* Set 12 bit mode */
+ ret |= KXCJK1013_REG_CTRL1_BIT_RES;
+
+ ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_CTRL1,
+ ret);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_ctrl\n");
+ return ret;
+ }
+
+ /* Setting range to 4G */
+ ret = kxcjk1013_set_range(data, KXCJK1013_RANGE_4G);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_DATA_CTRL);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_data_ctrl\n");
+ return ret;
+ }
+
+ data->odr_bits = ret;
+
+ /* Set up INT polarity */
+ ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
+ return ret;
+ }
+
+ if (data->active_high_intr)
+ ret |= KXCJK1013_REG_INT_REG1_BIT_IEA;
+ else
+ ret &= ~KXCJK1013_REG_INT_REG1_BIT_IEA;
+
+ ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
+ ret);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
+ return ret;
+ }
+
+ ret = kxcjk1013_set_mode(data, OPERATION);
+ if (ret < 0)
+ return ret;
+
+ data->wake_thres = KXCJK1013_DEFAULT_WAKE_THRES;
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int kxcjk1013_get_startup_times(struct kxcjk1013_data *data)
+{
+ int i;
+ int idx = data->chipset;
+
+ for (i = 0; i < ARRAY_SIZE(odr_start_up_times[idx]); ++i) {
+ if (odr_start_up_times[idx][i].odr_bits == data->odr_bits)
+ return odr_start_up_times[idx][i].usec;
+ }
+
+ return KXCJK1013_MAX_STARTUP_TIME_US;
+}
+#endif
+
+static int kxcjk1013_set_power_state(struct kxcjk1013_data *data, bool on)
+{
+#ifdef CONFIG_PM
+ int ret;
+
+ if (on)
+ ret = pm_runtime_get_sync(&data->client->dev);
+ else {
+ pm_runtime_mark_last_busy(&data->client->dev);
+ ret = pm_runtime_put_autosuspend(&data->client->dev);
+ }
+ if (ret < 0) {
+ dev_err(&data->client->dev,
+ "Failed: kxcjk1013_set_power_state for %d\n", on);
+ if (on)
+ pm_runtime_put_noidle(&data->client->dev);
+ return ret;
+ }
+#endif
+
+ return 0;
+}
+
+static int kxcjk1013_chip_update_thresholds(struct kxcjk1013_data *data)
+{
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(data->client,
+ KXCJK1013_REG_WAKE_TIMER,
+ data->wake_dur);
+ if (ret < 0) {
+ dev_err(&data->client->dev,
+ "Error writing reg_wake_timer\n");
+ return ret;
+ }
+
+ ret = i2c_smbus_write_byte_data(data->client,
+ KXCJK1013_REG_WAKE_THRES,
+ data->wake_thres);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error writing reg_wake_thres\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int kxcjk1013_setup_any_motion_interrupt(struct kxcjk1013_data *data,
+ bool status)
+{
+ int ret;
+ enum kxcjk1013_mode store_mode;
+
+ ret = kxcjk1013_get_mode(data, &store_mode);
+ if (ret < 0)
+ return ret;
+
+ /* This is requirement by spec to change state to STANDBY */
+ ret = kxcjk1013_set_mode(data, STANDBY);
+ if (ret < 0)
+ return ret;
+
+ ret = kxcjk1013_chip_update_thresholds(data);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
+ return ret;
+ }
+
+ if (status)
+ ret |= KXCJK1013_REG_INT_REG1_BIT_IEN;
+ else
+ ret &= ~KXCJK1013_REG_INT_REG1_BIT_IEN;
+
+ ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
+ ret);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
+ return ret;
+ }
+
+ ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
+ return ret;
+ }
+
+ if (status)
+ ret |= KXCJK1013_REG_CTRL1_BIT_WUFE;
+ else
+ ret &= ~KXCJK1013_REG_CTRL1_BIT_WUFE;
+
+ ret = i2c_smbus_write_byte_data(data->client,
+ KXCJK1013_REG_CTRL1, ret);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
+ return ret;
+ }
+
+ if (store_mode == OPERATION) {
+ ret = kxcjk1013_set_mode(data, OPERATION);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int kxcjk1013_setup_new_data_interrupt(struct kxcjk1013_data *data,
+ bool status)
+{
+ int ret;
+ enum kxcjk1013_mode store_mode;
+
+ ret = kxcjk1013_get_mode(data, &store_mode);
+ if (ret < 0)
+ return ret;
+
+ /* This is requirement by spec to change state to STANDBY */
+ ret = kxcjk1013_set_mode(data, STANDBY);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
+ return ret;
+ }
+
+ if (status)
+ ret |= KXCJK1013_REG_INT_REG1_BIT_IEN;
+ else
+ ret &= ~KXCJK1013_REG_INT_REG1_BIT_IEN;
+
+ ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
+ ret);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
+ return ret;
+ }
+
+ ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
+ return ret;
+ }
+
+ if (status)
+ ret |= KXCJK1013_REG_CTRL1_BIT_DRDY;
+ else
+ ret &= ~KXCJK1013_REG_CTRL1_BIT_DRDY;
+
+ ret = i2c_smbus_write_byte_data(data->client,
+ KXCJK1013_REG_CTRL1, ret);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
+ return ret;
+ }
+
+ if (store_mode == OPERATION) {
+ ret = kxcjk1013_set_mode(data, OPERATION);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int kxcjk1013_convert_freq_to_bit(int val, int val2)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(samp_freq_table); ++i) {
+ if (samp_freq_table[i].val == val &&
+ samp_freq_table[i].val2 == val2) {
+ return samp_freq_table[i].odr_bits;
+ }
+ }
+
+ return -EINVAL;
+}
+
+static int kxcjk1013_convert_wake_odr_to_bit(int val, int val2)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(wake_odr_data_rate_table); ++i) {
+ if (wake_odr_data_rate_table[i].val == val &&
+ wake_odr_data_rate_table[i].val2 == val2) {
+ return wake_odr_data_rate_table[i].odr_bits;
+ }
+ }
+
+ return -EINVAL;
+}
+
+static int kxcjk1013_set_odr(struct kxcjk1013_data *data, int val, int val2)
+{
+ int ret;
+ int odr_bits;
+ enum kxcjk1013_mode store_mode;
+
+ ret = kxcjk1013_get_mode(data, &store_mode);
+ if (ret < 0)
+ return ret;
+
+ odr_bits = kxcjk1013_convert_freq_to_bit(val, val2);
+ if (odr_bits < 0)
+ return odr_bits;
+
+ /* To change ODR, the chip must be set to STANDBY as per spec */
+ ret = kxcjk1013_set_mode(data, STANDBY);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_DATA_CTRL,
+ odr_bits);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error writing data_ctrl\n");
+ return ret;
+ }
+
+ data->odr_bits = odr_bits;
+
+ odr_bits = kxcjk1013_convert_wake_odr_to_bit(val, val2);
+ if (odr_bits < 0)
+ return odr_bits;
+
+ ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_CTRL2,
+ odr_bits);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error writing reg_ctrl2\n");
+ return ret;
+ }
+
+ if (store_mode == OPERATION) {
+ ret = kxcjk1013_set_mode(data, OPERATION);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int kxcjk1013_get_odr(struct kxcjk1013_data *data, int *val, int *val2)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(samp_freq_table); ++i) {
+ if (samp_freq_table[i].odr_bits == data->odr_bits) {
+ *val = samp_freq_table[i].val;
+ *val2 = samp_freq_table[i].val2;
+ return IIO_VAL_INT_PLUS_MICRO;
+ }
+ }
+
+ return -EINVAL;
+}
+
+static int kxcjk1013_get_acc_reg(struct kxcjk1013_data *data, int axis)
+{
+ u8 reg = KXCJK1013_REG_XOUT_L + axis * 2;
+ int ret;
+
+ ret = i2c_smbus_read_word_data(data->client, reg);
+ if (ret < 0) {
+ dev_err(&data->client->dev,
+ "failed to read accel_%c registers\n", 'x' + axis);
+ return ret;
+ }
+
+ return ret;
+}
+
+static int kxcjk1013_set_scale(struct kxcjk1013_data *data, int val)
+{
+ int ret, i;
+ enum kxcjk1013_mode store_mode;
+
+
+ for (i = 0; i < ARRAY_SIZE(KXCJK1013_scale_table); ++i) {
+ if (KXCJK1013_scale_table[i].scale == val) {
+
+ ret = kxcjk1013_get_mode(data, &store_mode);
+ if (ret < 0)
+ return ret;
+
+ ret = kxcjk1013_set_mode(data, STANDBY);
+ if (ret < 0)
+ return ret;
+
+ ret = kxcjk1013_set_range(data, i);
+ if (ret < 0)
+ return ret;
+
+ if (store_mode == OPERATION) {
+ ret = kxcjk1013_set_mode(data, OPERATION);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+ }
+ }
+
+ return -EINVAL;
+}
+
+static int kxcjk1013_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int *val,
+ int *val2, long mask)
+{
+ struct kxcjk1013_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ mutex_lock(&data->mutex);
+ if (iio_buffer_enabled(indio_dev))
+ ret = -EBUSY;
+ else {
+ ret = kxcjk1013_set_power_state(data, true);
+ if (ret < 0) {
+ mutex_unlock(&data->mutex);
+ return ret;
+ }
+ ret = kxcjk1013_get_acc_reg(data, chan->scan_index);
+ if (ret < 0) {
+ kxcjk1013_set_power_state(data, false);
+ mutex_unlock(&data->mutex);
+ return ret;
+ }
+ *val = sign_extend32(ret >> 4, 11);
+ ret = kxcjk1013_set_power_state(data, false);
+ }
+ mutex_unlock(&data->mutex);
+
+ if (ret < 0)
+ return ret;
+
+ return IIO_VAL_INT;
+
+ case IIO_CHAN_INFO_SCALE:
+ *val = 0;
+ *val2 = KXCJK1013_scale_table[data->range].scale;
+ return IIO_VAL_INT_PLUS_MICRO;
+
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ mutex_lock(&data->mutex);
+ ret = kxcjk1013_get_odr(data, val, val2);
+ mutex_unlock(&data->mutex);
+ return ret;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int kxcjk1013_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int val,
+ int val2, long mask)
+{
+ struct kxcjk1013_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ mutex_lock(&data->mutex);
+ ret = kxcjk1013_set_odr(data, val, val2);
+ mutex_unlock(&data->mutex);
+ break;
+ case IIO_CHAN_INFO_SCALE:
+ if (val)
+ return -EINVAL;
+
+ mutex_lock(&data->mutex);
+ ret = kxcjk1013_set_scale(data, val2);
+ mutex_unlock(&data->mutex);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static int kxcjk1013_read_event(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int *val, int *val2)
+{
+ struct kxcjk1013_data *data = iio_priv(indio_dev);
+
+ *val2 = 0;
+ switch (info) {
+ case IIO_EV_INFO_VALUE:
+ *val = data->wake_thres;
+ break;
+ case IIO_EV_INFO_PERIOD:
+ *val = data->wake_dur;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return IIO_VAL_INT;
+}
+
+static int kxcjk1013_write_event(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int val, int val2)
+{
+ struct kxcjk1013_data *data = iio_priv(indio_dev);
+
+ if (data->ev_enable_state)
+ return -EBUSY;
+
+ switch (info) {
+ case IIO_EV_INFO_VALUE:
+ data->wake_thres = val;
+ break;
+ case IIO_EV_INFO_PERIOD:
+ data->wake_dur = val;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int kxcjk1013_read_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir)
+{
+
+ struct kxcjk1013_data *data = iio_priv(indio_dev);
+
+ return data->ev_enable_state;
+}
+
+static int kxcjk1013_write_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ int state)
+{
+ struct kxcjk1013_data *data = iio_priv(indio_dev);
+ int ret;
+
+ if (state && data->ev_enable_state)
+ return 0;
+
+ mutex_lock(&data->mutex);
+
+ if (!state && data->motion_trigger_on) {
+ data->ev_enable_state = 0;
+ mutex_unlock(&data->mutex);
+ return 0;
+ }
+
+ /*
+ * We will expect the enable and disable to do operation in
+ * in reverse order. This will happen here anyway as our
+ * resume operation uses sync mode runtime pm calls, the
+ * suspend operation will be delayed by autosuspend delay
+ * So the disable operation will still happen in reverse of
+ * enable operation. When runtime pm is disabled the mode
+ * is always on so sequence doesn't matter
+ */
+ ret = kxcjk1013_set_power_state(data, state);
+ if (ret < 0) {
+ mutex_unlock(&data->mutex);
+ return ret;
+ }
+
+ ret = kxcjk1013_setup_any_motion_interrupt(data, state);
+ if (ret < 0) {
+ kxcjk1013_set_power_state(data, false);
+ data->ev_enable_state = 0;
+ mutex_unlock(&data->mutex);
+ return ret;
+ }
+
+ data->ev_enable_state = state;
+ mutex_unlock(&data->mutex);
+
+ return 0;
+}
+
+static int kxcjk1013_validate_trigger(struct iio_dev *indio_dev,
+ struct iio_trigger *trig)
+{
+ struct kxcjk1013_data *data = iio_priv(indio_dev);
+
+ if (data->dready_trig != trig && data->motion_trig != trig)
+ return -EINVAL;
+
+ return 0;
+}
+
+static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(
+ "0.781000 1.563000 3.125000 6.250000 12.500000 25 50 100 200 400 800 1600");
+
+static IIO_CONST_ATTR(in_accel_scale_available, "0.009582 0.019163 0.038326");
+
+static struct attribute *kxcjk1013_attributes[] = {
+ &iio_const_attr_sampling_frequency_available.dev_attr.attr,
+ &iio_const_attr_in_accel_scale_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group kxcjk1013_attrs_group = {
+ .attrs = kxcjk1013_attributes,
+};
+
+static const struct iio_event_spec kxcjk1013_event = {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_EITHER,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE) |
+ BIT(IIO_EV_INFO_PERIOD)
+};
+
+#define KXCJK1013_CHANNEL(_axis) { \
+ .type = IIO_ACCEL, \
+ .modified = 1, \
+ .channel2 = IIO_MOD_##_axis, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
+ BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .scan_index = AXIS_##_axis, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = 12, \
+ .storagebits = 16, \
+ .shift = 4, \
+ .endianness = IIO_CPU, \
+ }, \
+ .event_spec = &kxcjk1013_event, \
+ .num_event_specs = 1 \
+}
+
+static const struct iio_chan_spec kxcjk1013_channels[] = {
+ KXCJK1013_CHANNEL(X),
+ KXCJK1013_CHANNEL(Y),
+ KXCJK1013_CHANNEL(Z),
+ IIO_CHAN_SOFT_TIMESTAMP(3),
+};
+
+static const struct iio_info kxcjk1013_info = {
+ .attrs = &kxcjk1013_attrs_group,
+ .read_raw = kxcjk1013_read_raw,
+ .write_raw = kxcjk1013_write_raw,
+ .read_event_value = kxcjk1013_read_event,
+ .write_event_value = kxcjk1013_write_event,
+ .write_event_config = kxcjk1013_write_event_config,
+ .read_event_config = kxcjk1013_read_event_config,
+ .validate_trigger = kxcjk1013_validate_trigger,
+ .driver_module = THIS_MODULE,
+};
+
+static irqreturn_t kxcjk1013_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct kxcjk1013_data *data = iio_priv(indio_dev);
+ int bit, ret, i = 0;
+
+ mutex_lock(&data->mutex);
+
+ for_each_set_bit(bit, indio_dev->active_scan_mask,
+ indio_dev->masklength) {
+ ret = kxcjk1013_get_acc_reg(data, bit);
+ if (ret < 0) {
+ mutex_unlock(&data->mutex);
+ goto err;
+ }
+ data->buffer[i++] = ret;
+ }
+ mutex_unlock(&data->mutex);
+
+ iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
+ data->timestamp);
+err:
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+}
+
+static int kxcjk1013_trig_try_reen(struct iio_trigger *trig)
+{
+ struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+ struct kxcjk1013_data *data = iio_priv(indio_dev);
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_REL);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_int_rel\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int kxcjk1013_data_rdy_trigger_set_state(struct iio_trigger *trig,
+ bool state)
+{
+ struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+ struct kxcjk1013_data *data = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&data->mutex);
+
+ if (!state && data->ev_enable_state && data->motion_trigger_on) {
+ data->motion_trigger_on = false;
+ mutex_unlock(&data->mutex);
+ return 0;
+ }
+
+ ret = kxcjk1013_set_power_state(data, state);
+ if (ret < 0) {
+ mutex_unlock(&data->mutex);
+ return ret;
+ }
+ if (data->motion_trig == trig)
+ ret = kxcjk1013_setup_any_motion_interrupt(data, state);
+ else
+ ret = kxcjk1013_setup_new_data_interrupt(data, state);
+ if (ret < 0) {
+ kxcjk1013_set_power_state(data, false);
+ mutex_unlock(&data->mutex);
+ return ret;
+ }
+ if (data->motion_trig == trig)
+ data->motion_trigger_on = state;
+ else
+ data->dready_trigger_on = state;
+
+ mutex_unlock(&data->mutex);
+
+ return 0;
+}
+
+static const struct iio_trigger_ops kxcjk1013_trigger_ops = {
+ .set_trigger_state = kxcjk1013_data_rdy_trigger_set_state,
+ .try_reenable = kxcjk1013_trig_try_reen,
+ .owner = THIS_MODULE,
+};
+
+static irqreturn_t kxcjk1013_event_handler(int irq, void *private)
+{
+ struct iio_dev *indio_dev = private;
+ struct kxcjk1013_data *data = iio_priv(indio_dev);
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_SRC1);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_int_src1\n");
+ goto ack_intr;
+ }
+
+ if (ret & 0x02) {
+ ret = i2c_smbus_read_byte_data(data->client,
+ KXCJK1013_REG_INT_SRC2);
+ if (ret < 0) {
+ dev_err(&data->client->dev,
+ "Error reading reg_int_src2\n");
+ goto ack_intr;
+ }
+
+ if (ret & KXCJK1013_REG_INT_SRC2_BIT_XN)
+ iio_push_event(indio_dev,
+ IIO_MOD_EVENT_CODE(IIO_ACCEL,
+ 0,
+ IIO_MOD_X,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_FALLING),
+ data->timestamp);
+ if (ret & KXCJK1013_REG_INT_SRC2_BIT_XP)
+ iio_push_event(indio_dev,
+ IIO_MOD_EVENT_CODE(IIO_ACCEL,
+ 0,
+ IIO_MOD_X,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_RISING),
+ data->timestamp);
+
+
+ if (ret & KXCJK1013_REG_INT_SRC2_BIT_YN)
+ iio_push_event(indio_dev,
+ IIO_MOD_EVENT_CODE(IIO_ACCEL,
+ 0,
+ IIO_MOD_Y,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_FALLING),
+ data->timestamp);
+ if (ret & KXCJK1013_REG_INT_SRC2_BIT_YP)
+ iio_push_event(indio_dev,
+ IIO_MOD_EVENT_CODE(IIO_ACCEL,
+ 0,
+ IIO_MOD_Y,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_RISING),
+ data->timestamp);
+
+ if (ret & KXCJK1013_REG_INT_SRC2_BIT_ZN)
+ iio_push_event(indio_dev,
+ IIO_MOD_EVENT_CODE(IIO_ACCEL,
+ 0,
+ IIO_MOD_Z,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_FALLING),
+ data->timestamp);
+ if (ret & KXCJK1013_REG_INT_SRC2_BIT_ZP)
+ iio_push_event(indio_dev,
+ IIO_MOD_EVENT_CODE(IIO_ACCEL,
+ 0,
+ IIO_MOD_Z,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_RISING),
+ data->timestamp);
+ }
+
+ack_intr:
+ if (data->dready_trigger_on)
+ return IRQ_HANDLED;
+
+ ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_REL);
+ if (ret < 0)
+ dev_err(&data->client->dev, "Error reading reg_int_rel\n");
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t kxcjk1013_data_rdy_trig_poll(int irq, void *private)
+{
+ struct iio_dev *indio_dev = private;
+ struct kxcjk1013_data *data = iio_priv(indio_dev);
+
+ data->timestamp = iio_get_time_ns();
+
+ if (data->dready_trigger_on)
+ iio_trigger_poll(data->dready_trig);
+ else if (data->motion_trigger_on)
+ iio_trigger_poll(data->motion_trig);
+
+ if (data->ev_enable_state)
+ return IRQ_WAKE_THREAD;
+ else
+ return IRQ_HANDLED;
+}
+
+static const char *kxcjk1013_match_acpi_device(struct device *dev,
+ enum kx_chipset *chipset,
+ bool *is_smo8500_device)
+{
+ const struct acpi_device_id *id;
+
+ id = acpi_match_device(dev->driver->acpi_match_table, dev);
+ if (!id)
+ return NULL;
+ if (strcmp(id->id, "SMO8500") == 0)
+ *is_smo8500_device = true;
+ *chipset = (enum kx_chipset)id->driver_data;
+
+ return dev_name(dev);
+}
+
+static int kxcjk1013_gpio_probe(struct i2c_client *client,
+ struct kxcjk1013_data *data)
+{
+ struct device *dev;
+ struct gpio_desc *gpio;
+ int ret;
+
+ if (!client)
+ return -EINVAL;
+ if (data->is_smo8500_device)
+ return -ENOTSUPP;
+
+ dev = &client->dev;
+
+ /* data ready gpio interrupt pin */
+ gpio = devm_gpiod_get_index(dev, "kxcjk1013_int", 0, GPIOD_IN);
+ if (IS_ERR(gpio)) {
+ dev_err(dev, "acpi gpio get index failed\n");
+ return PTR_ERR(gpio);
+ }
+
+ ret = gpiod_to_irq(gpio);
+
+ dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret);
+
+ return ret;
+}
+
+static int kxcjk1013_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct kxcjk1013_data *data;
+ struct iio_dev *indio_dev;
+ struct kxcjk_1013_platform_data *pdata;
+ const char *name;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+
+ pdata = dev_get_platdata(&client->dev);
+ if (pdata)
+ data->active_high_intr = pdata->active_high_intr;
+ else
+ data->active_high_intr = true; /* default polarity */
+
+ if (id) {
+ data->chipset = (enum kx_chipset)(id->driver_data);
+ name = id->name;
+ } else if (ACPI_HANDLE(&client->dev)) {
+ name = kxcjk1013_match_acpi_device(&client->dev,
+ &data->chipset,
+ &data->is_smo8500_device);
+ } else
+ return -ENODEV;
+
+ ret = kxcjk1013_chip_init(data);
+ if (ret < 0)
+ return ret;
+
+ mutex_init(&data->mutex);
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->channels = kxcjk1013_channels;
+ indio_dev->num_channels = ARRAY_SIZE(kxcjk1013_channels);
+ indio_dev->name = name;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->info = &kxcjk1013_info;
+
+ if (client->irq < 0)
+ client->irq = kxcjk1013_gpio_probe(client, data);
+
+ if (client->irq >= 0) {
+ ret = devm_request_threaded_irq(&client->dev, client->irq,
+ kxcjk1013_data_rdy_trig_poll,
+ kxcjk1013_event_handler,
+ IRQF_TRIGGER_RISING,
+ KXCJK1013_IRQ_NAME,
+ indio_dev);
+ if (ret)
+ goto err_poweroff;
+
+ data->dready_trig = devm_iio_trigger_alloc(&client->dev,
+ "%s-dev%d",
+ indio_dev->name,
+ indio_dev->id);
+ if (!data->dready_trig) {
+ ret = -ENOMEM;
+ goto err_poweroff;
+ }
+
+ data->motion_trig = devm_iio_trigger_alloc(&client->dev,
+ "%s-any-motion-dev%d",
+ indio_dev->name,
+ indio_dev->id);
+ if (!data->motion_trig) {
+ ret = -ENOMEM;
+ goto err_poweroff;
+ }
+
+ data->dready_trig->dev.parent = &client->dev;
+ data->dready_trig->ops = &kxcjk1013_trigger_ops;
+ iio_trigger_set_drvdata(data->dready_trig, indio_dev);
+ indio_dev->trig = data->dready_trig;
+ iio_trigger_get(indio_dev->trig);
+ ret = iio_trigger_register(data->dready_trig);
+ if (ret)
+ goto err_poweroff;
+
+ data->motion_trig->dev.parent = &client->dev;
+ data->motion_trig->ops = &kxcjk1013_trigger_ops;
+ iio_trigger_set_drvdata(data->motion_trig, indio_dev);
+ ret = iio_trigger_register(data->motion_trig);
+ if (ret) {
+ data->motion_trig = NULL;
+ goto err_trigger_unregister;
+ }
+
+ ret = iio_triggered_buffer_setup(indio_dev,
+ &iio_pollfunc_store_time,
+ kxcjk1013_trigger_handler,
+ NULL);
+ if (ret < 0) {
+ dev_err(&client->dev,
+ "iio triggered buffer setup failed\n");
+ goto err_trigger_unregister;
+ }
+ }
+
+ ret = iio_device_register(indio_dev);
+ if (ret < 0) {
+ dev_err(&client->dev, "unable to register iio device\n");
+ goto err_buffer_cleanup;
+ }
+
+ ret = pm_runtime_set_active(&client->dev);
+ if (ret)
+ goto err_iio_unregister;
+
+ pm_runtime_enable(&client->dev);
+ pm_runtime_set_autosuspend_delay(&client->dev,
+ KXCJK1013_SLEEP_DELAY_MS);
+ pm_runtime_use_autosuspend(&client->dev);
+
+ return 0;
+
+err_iio_unregister:
+ iio_device_unregister(indio_dev);
+err_buffer_cleanup:
+ if (data->dready_trig)
+ iio_triggered_buffer_cleanup(indio_dev);
+err_trigger_unregister:
+ if (data->dready_trig)
+ iio_trigger_unregister(data->dready_trig);
+ if (data->motion_trig)
+ iio_trigger_unregister(data->motion_trig);
+err_poweroff:
+ kxcjk1013_set_mode(data, STANDBY);
+
+ return ret;
+}
+
+static int kxcjk1013_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct kxcjk1013_data *data = iio_priv(indio_dev);
+
+ pm_runtime_disable(&client->dev);
+ pm_runtime_set_suspended(&client->dev);
+ pm_runtime_put_noidle(&client->dev);
+
+ iio_device_unregister(indio_dev);
+
+ if (data->dready_trig) {
+ iio_triggered_buffer_cleanup(indio_dev);
+ iio_trigger_unregister(data->dready_trig);
+ iio_trigger_unregister(data->motion_trig);
+ }
+
+ mutex_lock(&data->mutex);
+ kxcjk1013_set_mode(data, STANDBY);
+ mutex_unlock(&data->mutex);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int kxcjk1013_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct kxcjk1013_data *data = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&data->mutex);
+ ret = kxcjk1013_set_mode(data, STANDBY);
+ mutex_unlock(&data->mutex);
+
+ return ret;
+}
+
+static int kxcjk1013_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct kxcjk1013_data *data = iio_priv(indio_dev);
+ int ret = 0;
+
+ mutex_lock(&data->mutex);
+ ret = kxcjk1013_set_mode(data, OPERATION);
+ mutex_unlock(&data->mutex);
+
+ return ret;
+}
+#endif
+
+#ifdef CONFIG_PM
+static int kxcjk1013_runtime_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct kxcjk1013_data *data = iio_priv(indio_dev);
+ int ret;
+
+ ret = kxcjk1013_set_mode(data, STANDBY);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "powering off device failed\n");
+ return -EAGAIN;
+ }
+ return 0;
+}
+
+static int kxcjk1013_runtime_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct kxcjk1013_data *data = iio_priv(indio_dev);
+ int ret;
+ int sleep_val;
+
+ ret = kxcjk1013_set_mode(data, OPERATION);
+ if (ret < 0)
+ return ret;
+
+ sleep_val = kxcjk1013_get_startup_times(data);
+ if (sleep_val < 20000)
+ usleep_range(sleep_val, 20000);
+ else
+ msleep_interruptible(sleep_val/1000);
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops kxcjk1013_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(kxcjk1013_suspend, kxcjk1013_resume)
+ SET_RUNTIME_PM_OPS(kxcjk1013_runtime_suspend,
+ kxcjk1013_runtime_resume, NULL)
+};
+
+static const struct acpi_device_id kx_acpi_match[] = {
+ {"KXCJ1013", KXCJK1013},
+ {"KXCJ1008", KXCJ91008},
+ {"KXCJ9000", KXCJ91008},
+ {"KXTJ1009", KXTJ21009},
+ {"SMO8500", KXCJ91008},
+ { },
+};
+MODULE_DEVICE_TABLE(acpi, kx_acpi_match);
+
+static const struct i2c_device_id kxcjk1013_id[] = {
+ {"kxcjk1013", KXCJK1013},
+ {"kxcj91008", KXCJ91008},
+ {"kxtj21009", KXTJ21009},
+ {"SMO8500", KXCJ91008},
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, kxcjk1013_id);
+
+static struct i2c_driver kxcjk1013_driver = {
+ .driver = {
+ .name = KXCJK1013_DRV_NAME,
+ .acpi_match_table = ACPI_PTR(kx_acpi_match),
+ .pm = &kxcjk1013_pm_ops,
+ },
+ .probe = kxcjk1013_probe,
+ .remove = kxcjk1013_remove,
+ .id_table = kxcjk1013_id,
+};
+module_i2c_driver(kxcjk1013_driver);
+
+MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("KXCJK1013 accelerometer driver");
diff --git a/drivers/iio/accel/kxsd9.c b/drivers/iio/accel/kxsd9.c
new file mode 100644
index 000000000..98ba761cb
--- /dev/null
+++ b/drivers/iio/accel/kxsd9.c
@@ -0,0 +1,276 @@
+/*
+ * kxsd9.c simple support for the Kionix KXSD9 3D
+ * accelerometer.
+ *
+ * Copyright (c) 2008-2009 Jonathan Cameron <jic23@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * The i2c interface is very similar, so shouldn't be a problem once
+ * I have a suitable wire made up.
+ *
+ * TODO: Support the motion detector
+ * Uses register address incrementing so could have a
+ * heavily optimized ring buffer access function.
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/spi/spi.h>
+#include <linux/sysfs.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+
+#define KXSD9_REG_X 0x00
+#define KXSD9_REG_Y 0x02
+#define KXSD9_REG_Z 0x04
+#define KXSD9_REG_AUX 0x06
+#define KXSD9_REG_RESET 0x0a
+#define KXSD9_REG_CTRL_C 0x0c
+
+#define KXSD9_FS_MASK 0x03
+
+#define KXSD9_REG_CTRL_B 0x0d
+#define KXSD9_REG_CTRL_A 0x0e
+
+#define KXSD9_READ(a) (0x80 | (a))
+#define KXSD9_WRITE(a) (a)
+
+#define KXSD9_STATE_RX_SIZE 2
+#define KXSD9_STATE_TX_SIZE 2
+/**
+ * struct kxsd9_state - device related storage
+ * @buf_lock: protect the rx and tx buffers.
+ * @us: spi device
+ * @rx: single rx buffer storage
+ * @tx: single tx buffer storage
+ **/
+struct kxsd9_state {
+ struct mutex buf_lock;
+ struct spi_device *us;
+ u8 rx[KXSD9_STATE_RX_SIZE] ____cacheline_aligned;
+ u8 tx[KXSD9_STATE_TX_SIZE];
+};
+
+#define KXSD9_SCALE_2G "0.011978"
+#define KXSD9_SCALE_4G "0.023927"
+#define KXSD9_SCALE_6G "0.035934"
+#define KXSD9_SCALE_8G "0.047853"
+
+/* reverse order */
+static const int kxsd9_micro_scales[4] = { 47853, 35934, 23927, 11978 };
+
+static int kxsd9_write_scale(struct iio_dev *indio_dev, int micro)
+{
+ int ret, i;
+ struct kxsd9_state *st = iio_priv(indio_dev);
+ bool foundit = false;
+
+ for (i = 0; i < 4; i++)
+ if (micro == kxsd9_micro_scales[i]) {
+ foundit = true;
+ break;
+ }
+ if (!foundit)
+ return -EINVAL;
+
+ mutex_lock(&st->buf_lock);
+ ret = spi_w8r8(st->us, KXSD9_READ(KXSD9_REG_CTRL_C));
+ if (ret)
+ goto error_ret;
+ st->tx[0] = KXSD9_WRITE(KXSD9_REG_CTRL_C);
+ st->tx[1] = (ret & ~KXSD9_FS_MASK) | i;
+
+ ret = spi_write(st->us, st->tx, 2);
+error_ret:
+ mutex_unlock(&st->buf_lock);
+ return ret;
+}
+
+static int kxsd9_read(struct iio_dev *indio_dev, u8 address)
+{
+ int ret;
+ struct kxsd9_state *st = iio_priv(indio_dev);
+ struct spi_transfer xfers[] = {
+ {
+ .bits_per_word = 8,
+ .len = 1,
+ .delay_usecs = 200,
+ .tx_buf = st->tx,
+ }, {
+ .bits_per_word = 8,
+ .len = 2,
+ .rx_buf = st->rx,
+ },
+ };
+
+ mutex_lock(&st->buf_lock);
+ st->tx[0] = KXSD9_READ(address);
+ ret = spi_sync_transfer(st->us, xfers, ARRAY_SIZE(xfers));
+ if (!ret)
+ ret = (((u16)(st->rx[0])) << 8) | (st->rx[1] & 0xF0);
+ mutex_unlock(&st->buf_lock);
+ return ret;
+}
+
+static IIO_CONST_ATTR(accel_scale_available,
+ KXSD9_SCALE_2G " "
+ KXSD9_SCALE_4G " "
+ KXSD9_SCALE_6G " "
+ KXSD9_SCALE_8G);
+
+static struct attribute *kxsd9_attributes[] = {
+ &iio_const_attr_accel_scale_available.dev_attr.attr,
+ NULL,
+};
+
+static int kxsd9_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val,
+ int val2,
+ long mask)
+{
+ int ret = -EINVAL;
+
+ if (mask == IIO_CHAN_INFO_SCALE) {
+ /* Check no integer component */
+ if (val)
+ return -EINVAL;
+ ret = kxsd9_write_scale(indio_dev, val2);
+ }
+
+ return ret;
+}
+
+static int kxsd9_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ int ret = -EINVAL;
+ struct kxsd9_state *st = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ ret = kxsd9_read(indio_dev, chan->address);
+ if (ret < 0)
+ goto error_ret;
+ *val = ret;
+ break;
+ case IIO_CHAN_INFO_SCALE:
+ ret = spi_w8r8(st->us, KXSD9_READ(KXSD9_REG_CTRL_C));
+ if (ret)
+ goto error_ret;
+ *val2 = kxsd9_micro_scales[ret & KXSD9_FS_MASK];
+ ret = IIO_VAL_INT_PLUS_MICRO;
+ break;
+ }
+
+error_ret:
+ return ret;
+};
+#define KXSD9_ACCEL_CHAN(axis) \
+ { \
+ .type = IIO_ACCEL, \
+ .modified = 1, \
+ .channel2 = IIO_MOD_##axis, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
+ .address = KXSD9_REG_##axis, \
+ }
+
+static const struct iio_chan_spec kxsd9_channels[] = {
+ KXSD9_ACCEL_CHAN(X), KXSD9_ACCEL_CHAN(Y), KXSD9_ACCEL_CHAN(Z),
+ {
+ .type = IIO_VOLTAGE,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .indexed = 1,
+ .address = KXSD9_REG_AUX,
+ }
+};
+
+static const struct attribute_group kxsd9_attribute_group = {
+ .attrs = kxsd9_attributes,
+};
+
+static int kxsd9_power_up(struct kxsd9_state *st)
+{
+ int ret;
+
+ st->tx[0] = 0x0d;
+ st->tx[1] = 0x40;
+ ret = spi_write(st->us, st->tx, 2);
+ if (ret)
+ return ret;
+
+ st->tx[0] = 0x0c;
+ st->tx[1] = 0x9b;
+ return spi_write(st->us, st->tx, 2);
+};
+
+static const struct iio_info kxsd9_info = {
+ .read_raw = &kxsd9_read_raw,
+ .write_raw = &kxsd9_write_raw,
+ .attrs = &kxsd9_attribute_group,
+ .driver_module = THIS_MODULE,
+};
+
+static int kxsd9_probe(struct spi_device *spi)
+{
+ struct iio_dev *indio_dev;
+ struct kxsd9_state *st;
+
+ indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ st = iio_priv(indio_dev);
+ spi_set_drvdata(spi, indio_dev);
+
+ st->us = spi;
+ mutex_init(&st->buf_lock);
+ indio_dev->channels = kxsd9_channels;
+ indio_dev->num_channels = ARRAY_SIZE(kxsd9_channels);
+ indio_dev->name = spi_get_device_id(spi)->name;
+ indio_dev->dev.parent = &spi->dev;
+ indio_dev->info = &kxsd9_info;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ spi->mode = SPI_MODE_0;
+ spi_setup(spi);
+ kxsd9_power_up(st);
+
+ return iio_device_register(indio_dev);
+}
+
+static int kxsd9_remove(struct spi_device *spi)
+{
+ iio_device_unregister(spi_get_drvdata(spi));
+
+ return 0;
+}
+
+static const struct spi_device_id kxsd9_id[] = {
+ {"kxsd9", 0},
+ { },
+};
+MODULE_DEVICE_TABLE(spi, kxsd9_id);
+
+static struct spi_driver kxsd9_driver = {
+ .driver = {
+ .name = "kxsd9",
+ .owner = THIS_MODULE,
+ },
+ .probe = kxsd9_probe,
+ .remove = kxsd9_remove,
+ .id_table = kxsd9_id,
+};
+module_spi_driver(kxsd9_driver);
+
+MODULE_AUTHOR("Jonathan Cameron <jic23@kernel.org>");
+MODULE_DESCRIPTION("Kionix KXSD9 SPI driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/mma8452.c b/drivers/iio/accel/mma8452.c
new file mode 100644
index 000000000..5b8065788
--- /dev/null
+++ b/drivers/iio/accel/mma8452.c
@@ -0,0 +1,451 @@
+/*
+ * mma8452.c - Support for Freescale MMA8452Q 3-axis 12-bit accelerometer
+ *
+ * Copyright 2014 Peter Meerwald <pmeerw@pmeerw.net>
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License. See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * 7-bit I2C slave address 0x1c/0x1d (pin selectable)
+ *
+ * TODO: interrupt, thresholding, orientation / freefall events, autosleep
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/delay.h>
+
+#define MMA8452_STATUS 0x00
+#define MMA8452_OUT_X 0x01 /* MSB first, 12-bit */
+#define MMA8452_OUT_Y 0x03
+#define MMA8452_OUT_Z 0x05
+#define MMA8452_WHO_AM_I 0x0d
+#define MMA8452_DATA_CFG 0x0e
+#define MMA8452_OFF_X 0x2f
+#define MMA8452_OFF_Y 0x30
+#define MMA8452_OFF_Z 0x31
+#define MMA8452_CTRL_REG1 0x2a
+#define MMA8452_CTRL_REG2 0x2b
+
+#define MMA8452_STATUS_DRDY (BIT(2) | BIT(1) | BIT(0))
+
+#define MMA8452_CTRL_DR_MASK (BIT(5) | BIT(4) | BIT(3))
+#define MMA8452_CTRL_DR_SHIFT 3
+#define MMA8452_CTRL_DR_DEFAULT 0x4 /* 50 Hz sample frequency */
+#define MMA8452_CTRL_ACTIVE BIT(0)
+
+#define MMA8452_DATA_CFG_FS_MASK (BIT(1) | BIT(0))
+#define MMA8452_DATA_CFG_FS_2G 0
+#define MMA8452_DATA_CFG_FS_4G 1
+#define MMA8452_DATA_CFG_FS_8G 2
+
+#define MMA8452_DEVICE_ID 0x2a
+
+struct mma8452_data {
+ struct i2c_client *client;
+ struct mutex lock;
+ u8 ctrl_reg1;
+ u8 data_cfg;
+};
+
+static int mma8452_drdy(struct mma8452_data *data)
+{
+ int tries = 150;
+
+ while (tries-- > 0) {
+ int ret = i2c_smbus_read_byte_data(data->client,
+ MMA8452_STATUS);
+ if (ret < 0)
+ return ret;
+ if ((ret & MMA8452_STATUS_DRDY) == MMA8452_STATUS_DRDY)
+ return 0;
+ msleep(20);
+ }
+
+ dev_err(&data->client->dev, "data not ready\n");
+ return -EIO;
+}
+
+static int mma8452_read(struct mma8452_data *data, __be16 buf[3])
+{
+ int ret = mma8452_drdy(data);
+ if (ret < 0)
+ return ret;
+ return i2c_smbus_read_i2c_block_data(data->client,
+ MMA8452_OUT_X, 3 * sizeof(__be16), (u8 *) buf);
+}
+
+static ssize_t mma8452_show_int_plus_micros(char *buf,
+ const int (*vals)[2], int n)
+{
+ size_t len = 0;
+
+ while (n-- > 0)
+ len += scnprintf(buf + len, PAGE_SIZE - len,
+ "%d.%06d ", vals[n][0], vals[n][1]);
+
+ /* replace trailing space by newline */
+ buf[len - 1] = '\n';
+
+ return len;
+}
+
+static int mma8452_get_int_plus_micros_index(const int (*vals)[2], int n,
+ int val, int val2)
+{
+ while (n-- > 0)
+ if (val == vals[n][0] && val2 == vals[n][1])
+ return n;
+
+ return -EINVAL;
+}
+
+static const int mma8452_samp_freq[8][2] = {
+ {800, 0}, {400, 0}, {200, 0}, {100, 0}, {50, 0}, {12, 500000},
+ {6, 250000}, {1, 560000}
+};
+
+/*
+ * Hardware has fullscale of -2G, -4G, -8G corresponding to raw value -2048
+ * The userspace interface uses m/s^2 and we declare micro units
+ * So scale factor is given by:
+ * g * N * 1000000 / 2048 for N = 2, 4, 8 and g=9.80665
+ */
+static const int mma8452_scales[3][2] = {
+ {0, 9577}, {0, 19154}, {0, 38307}
+};
+
+static ssize_t mma8452_show_samp_freq_avail(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return mma8452_show_int_plus_micros(buf, mma8452_samp_freq,
+ ARRAY_SIZE(mma8452_samp_freq));
+}
+
+static ssize_t mma8452_show_scale_avail(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return mma8452_show_int_plus_micros(buf, mma8452_scales,
+ ARRAY_SIZE(mma8452_scales));
+}
+
+static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(mma8452_show_samp_freq_avail);
+static IIO_DEVICE_ATTR(in_accel_scale_available, S_IRUGO,
+ mma8452_show_scale_avail, NULL, 0);
+
+static int mma8452_get_samp_freq_index(struct mma8452_data *data,
+ int val, int val2)
+{
+ return mma8452_get_int_plus_micros_index(mma8452_samp_freq,
+ ARRAY_SIZE(mma8452_samp_freq), val, val2);
+}
+
+static int mma8452_get_scale_index(struct mma8452_data *data,
+ int val, int val2)
+{
+ return mma8452_get_int_plus_micros_index(mma8452_scales,
+ ARRAY_SIZE(mma8452_scales), val, val2);
+}
+
+static int mma8452_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct mma8452_data *data = iio_priv(indio_dev);
+ __be16 buffer[3];
+ int i, ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ if (iio_buffer_enabled(indio_dev))
+ return -EBUSY;
+
+ mutex_lock(&data->lock);
+ ret = mma8452_read(data, buffer);
+ mutex_unlock(&data->lock);
+ if (ret < 0)
+ return ret;
+ *val = sign_extend32(
+ be16_to_cpu(buffer[chan->scan_index]) >> 4, 11);
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ i = data->data_cfg & MMA8452_DATA_CFG_FS_MASK;
+ *val = mma8452_scales[i][0];
+ *val2 = mma8452_scales[i][1];
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ i = (data->ctrl_reg1 & MMA8452_CTRL_DR_MASK) >>
+ MMA8452_CTRL_DR_SHIFT;
+ *val = mma8452_samp_freq[i][0];
+ *val2 = mma8452_samp_freq[i][1];
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_CHAN_INFO_CALIBBIAS:
+ ret = i2c_smbus_read_byte_data(data->client, MMA8452_OFF_X +
+ chan->scan_index);
+ if (ret < 0)
+ return ret;
+ *val = sign_extend32(ret, 7);
+ return IIO_VAL_INT;
+ }
+ return -EINVAL;
+}
+
+static int mma8452_standby(struct mma8452_data *data)
+{
+ return i2c_smbus_write_byte_data(data->client, MMA8452_CTRL_REG1,
+ data->ctrl_reg1 & ~MMA8452_CTRL_ACTIVE);
+}
+
+static int mma8452_active(struct mma8452_data *data)
+{
+ return i2c_smbus_write_byte_data(data->client, MMA8452_CTRL_REG1,
+ data->ctrl_reg1);
+}
+
+static int mma8452_change_config(struct mma8452_data *data, u8 reg, u8 val)
+{
+ int ret;
+
+ mutex_lock(&data->lock);
+
+ /* config can only be changed when in standby */
+ ret = mma8452_standby(data);
+ if (ret < 0)
+ goto fail;
+
+ ret = i2c_smbus_write_byte_data(data->client, reg, val);
+ if (ret < 0)
+ goto fail;
+
+ ret = mma8452_active(data);
+ if (ret < 0)
+ goto fail;
+
+ ret = 0;
+fail:
+ mutex_unlock(&data->lock);
+ return ret;
+}
+
+static int mma8452_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct mma8452_data *data = iio_priv(indio_dev);
+ int i;
+
+ if (iio_buffer_enabled(indio_dev))
+ return -EBUSY;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ i = mma8452_get_samp_freq_index(data, val, val2);
+ if (i < 0)
+ return -EINVAL;
+
+ data->ctrl_reg1 &= ~MMA8452_CTRL_DR_MASK;
+ data->ctrl_reg1 |= i << MMA8452_CTRL_DR_SHIFT;
+ return mma8452_change_config(data, MMA8452_CTRL_REG1,
+ data->ctrl_reg1);
+ case IIO_CHAN_INFO_SCALE:
+ i = mma8452_get_scale_index(data, val, val2);
+ if (i < 0)
+ return -EINVAL;
+ data->data_cfg &= ~MMA8452_DATA_CFG_FS_MASK;
+ data->data_cfg |= i;
+ return mma8452_change_config(data, MMA8452_DATA_CFG,
+ data->data_cfg);
+ case IIO_CHAN_INFO_CALIBBIAS:
+ if (val < -128 || val > 127)
+ return -EINVAL;
+ return mma8452_change_config(data, MMA8452_OFF_X +
+ chan->scan_index, val);
+ default:
+ return -EINVAL;
+ }
+}
+
+static irqreturn_t mma8452_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct mma8452_data *data = iio_priv(indio_dev);
+ u8 buffer[16]; /* 3 16-bit channels + padding + ts */
+ int ret;
+
+ ret = mma8452_read(data, (__be16 *) buffer);
+ if (ret < 0)
+ goto done;
+
+ iio_push_to_buffers_with_timestamp(indio_dev, buffer,
+ iio_get_time_ns());
+
+done:
+ iio_trigger_notify_done(indio_dev->trig);
+ return IRQ_HANDLED;
+}
+
+#define MMA8452_CHANNEL(axis, idx) { \
+ .type = IIO_ACCEL, \
+ .modified = 1, \
+ .channel2 = IIO_MOD_##axis, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_CALIBBIAS), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) | \
+ BIT(IIO_CHAN_INFO_SCALE), \
+ .scan_index = idx, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = 12, \
+ .storagebits = 16, \
+ .shift = 4, \
+ .endianness = IIO_BE, \
+ }, \
+}
+
+static const struct iio_chan_spec mma8452_channels[] = {
+ MMA8452_CHANNEL(X, 0),
+ MMA8452_CHANNEL(Y, 1),
+ MMA8452_CHANNEL(Z, 2),
+ IIO_CHAN_SOFT_TIMESTAMP(3),
+};
+
+static struct attribute *mma8452_attributes[] = {
+ &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
+ &iio_dev_attr_in_accel_scale_available.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group mma8452_group = {
+ .attrs = mma8452_attributes,
+};
+
+static const struct iio_info mma8452_info = {
+ .attrs = &mma8452_group,
+ .read_raw = &mma8452_read_raw,
+ .write_raw = &mma8452_write_raw,
+ .driver_module = THIS_MODULE,
+};
+
+static const unsigned long mma8452_scan_masks[] = {0x7, 0};
+
+static int mma8452_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct mma8452_data *data;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(client, MMA8452_WHO_AM_I);
+ if (ret < 0)
+ return ret;
+ if (ret != MMA8452_DEVICE_ID)
+ return -ENODEV;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ data->client = client;
+ mutex_init(&data->lock);
+
+ i2c_set_clientdata(client, indio_dev);
+ indio_dev->info = &mma8452_info;
+ indio_dev->name = id->name;
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->channels = mma8452_channels;
+ indio_dev->num_channels = ARRAY_SIZE(mma8452_channels);
+ indio_dev->available_scan_masks = mma8452_scan_masks;
+
+ data->ctrl_reg1 = MMA8452_CTRL_ACTIVE |
+ (MMA8452_CTRL_DR_DEFAULT << MMA8452_CTRL_DR_SHIFT);
+ ret = i2c_smbus_write_byte_data(client, MMA8452_CTRL_REG1,
+ data->ctrl_reg1);
+ if (ret < 0)
+ return ret;
+
+ data->data_cfg = MMA8452_DATA_CFG_FS_2G;
+ ret = i2c_smbus_write_byte_data(client, MMA8452_DATA_CFG,
+ data->data_cfg);
+ if (ret < 0)
+ return ret;
+
+ ret = iio_triggered_buffer_setup(indio_dev, NULL,
+ mma8452_trigger_handler, NULL);
+ if (ret < 0)
+ return ret;
+
+ ret = iio_device_register(indio_dev);
+ if (ret < 0)
+ goto buffer_cleanup;
+ return 0;
+
+buffer_cleanup:
+ iio_triggered_buffer_cleanup(indio_dev);
+ return ret;
+}
+
+static int mma8452_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+
+ iio_device_unregister(indio_dev);
+ iio_triggered_buffer_cleanup(indio_dev);
+ mma8452_standby(iio_priv(indio_dev));
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int mma8452_suspend(struct device *dev)
+{
+ return mma8452_standby(iio_priv(i2c_get_clientdata(
+ to_i2c_client(dev))));
+}
+
+static int mma8452_resume(struct device *dev)
+{
+ return mma8452_active(iio_priv(i2c_get_clientdata(
+ to_i2c_client(dev))));
+}
+
+static SIMPLE_DEV_PM_OPS(mma8452_pm_ops, mma8452_suspend, mma8452_resume);
+#define MMA8452_PM_OPS (&mma8452_pm_ops)
+#else
+#define MMA8452_PM_OPS NULL
+#endif
+
+static const struct i2c_device_id mma8452_id[] = {
+ { "mma8452", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, mma8452_id);
+
+static const struct of_device_id mma8452_dt_ids[] = {
+ { .compatible = "fsl,mma8452" },
+ { }
+};
+
+static struct i2c_driver mma8452_driver = {
+ .driver = {
+ .name = "mma8452",
+ .of_match_table = of_match_ptr(mma8452_dt_ids),
+ .pm = MMA8452_PM_OPS,
+ },
+ .probe = mma8452_probe,
+ .remove = mma8452_remove,
+ .id_table = mma8452_id,
+};
+module_i2c_driver(mma8452_driver);
+
+MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
+MODULE_DESCRIPTION("Freescale MMA8452 accelerometer driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/accel/mma9551.c b/drivers/iio/accel/mma9551.c
new file mode 100644
index 000000000..7db7cc0bf
--- /dev/null
+++ b/drivers/iio/accel/mma9551.c
@@ -0,0 +1,638 @@
+/*
+ * Freescale MMA9551L Intelligent Motion-Sensing Platform driver
+ * Copyright (c) 2014, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+#include <linux/acpi.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/events.h>
+#include <linux/pm_runtime.h>
+#include "mma9551_core.h"
+
+#define MMA9551_DRV_NAME "mma9551"
+#define MMA9551_IRQ_NAME "mma9551_event"
+#define MMA9551_GPIO_NAME "mma9551_int"
+#define MMA9551_GPIO_COUNT 4
+
+/* Tilt application (inclination in IIO terms). */
+#define MMA9551_TILT_XZ_ANG_REG 0x00
+#define MMA9551_TILT_YZ_ANG_REG 0x01
+#define MMA9551_TILT_XY_ANG_REG 0x02
+#define MMA9551_TILT_ANGFLG BIT(7)
+#define MMA9551_TILT_QUAD_REG 0x03
+#define MMA9551_TILT_XY_QUAD_SHIFT 0
+#define MMA9551_TILT_YZ_QUAD_SHIFT 2
+#define MMA9551_TILT_XZ_QUAD_SHIFT 4
+#define MMA9551_TILT_CFG_REG 0x01
+#define MMA9551_TILT_ANG_THRESH_MASK GENMASK(3, 0)
+
+#define MMA9551_DEFAULT_SAMPLE_RATE 122 /* Hz */
+
+/* Tilt events are mapped to the first three GPIO pins. */
+enum mma9551_tilt_axis {
+ mma9551_x = 0,
+ mma9551_y,
+ mma9551_z,
+};
+
+struct mma9551_data {
+ struct i2c_client *client;
+ struct mutex mutex;
+ int event_enabled[3];
+ int irqs[MMA9551_GPIO_COUNT];
+};
+
+static int mma9551_read_incli_chan(struct i2c_client *client,
+ const struct iio_chan_spec *chan,
+ int *val)
+{
+ u8 quad_shift, angle, quadrant;
+ u16 reg_addr;
+ int ret;
+
+ switch (chan->channel2) {
+ case IIO_MOD_X:
+ reg_addr = MMA9551_TILT_YZ_ANG_REG;
+ quad_shift = MMA9551_TILT_YZ_QUAD_SHIFT;
+ break;
+ case IIO_MOD_Y:
+ reg_addr = MMA9551_TILT_XZ_ANG_REG;
+ quad_shift = MMA9551_TILT_XZ_QUAD_SHIFT;
+ break;
+ case IIO_MOD_Z:
+ reg_addr = MMA9551_TILT_XY_ANG_REG;
+ quad_shift = MMA9551_TILT_XY_QUAD_SHIFT;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = mma9551_set_power_state(client, true);
+ if (ret < 0)
+ return ret;
+
+ ret = mma9551_read_status_byte(client, MMA9551_APPID_TILT,
+ reg_addr, &angle);
+ if (ret < 0)
+ goto out_poweroff;
+
+ ret = mma9551_read_status_byte(client, MMA9551_APPID_TILT,
+ MMA9551_TILT_QUAD_REG, &quadrant);
+ if (ret < 0)
+ goto out_poweroff;
+
+ angle &= ~MMA9551_TILT_ANGFLG;
+ quadrant = (quadrant >> quad_shift) & 0x03;
+
+ if (quadrant == 1 || quadrant == 3)
+ *val = 90 * (quadrant + 1) - angle;
+ else
+ *val = angle + 90 * quadrant;
+
+ ret = IIO_VAL_INT;
+
+out_poweroff:
+ mma9551_set_power_state(client, false);
+ return ret;
+}
+
+static int mma9551_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct mma9551_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_PROCESSED:
+ switch (chan->type) {
+ case IIO_INCLI:
+ mutex_lock(&data->mutex);
+ ret = mma9551_read_incli_chan(data->client, chan, val);
+ mutex_unlock(&data->mutex);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_RAW:
+ switch (chan->type) {
+ case IIO_ACCEL:
+ mutex_lock(&data->mutex);
+ ret = mma9551_read_accel_chan(data->client,
+ chan, val, val2);
+ mutex_unlock(&data->mutex);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_ACCEL:
+ return mma9551_read_accel_scale(val, val2);
+ default:
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+static int mma9551_read_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir)
+{
+ struct mma9551_data *data = iio_priv(indio_dev);
+
+ switch (chan->type) {
+ case IIO_INCLI:
+ /* IIO counts axes from 1, because IIO_NO_MOD is 0. */
+ return data->event_enabled[chan->channel2 - 1];
+ default:
+ return -EINVAL;
+ }
+}
+
+static int mma9551_config_incli_event(struct iio_dev *indio_dev,
+ enum iio_modifier axis,
+ int state)
+{
+ struct mma9551_data *data = iio_priv(indio_dev);
+ enum mma9551_tilt_axis mma_axis;
+ int ret;
+
+ /* IIO counts axes from 1, because IIO_NO_MOD is 0. */
+ mma_axis = axis - 1;
+
+ if (data->event_enabled[mma_axis] == state)
+ return 0;
+
+ if (state == 0) {
+ ret = mma9551_gpio_config(data->client,
+ (enum mma9551_gpio_pin)mma_axis,
+ MMA9551_APPID_NONE, 0, 0);
+ if (ret < 0)
+ return ret;
+
+ ret = mma9551_set_power_state(data->client, false);
+ if (ret < 0)
+ return ret;
+ } else {
+ int bitnum;
+
+ /* Bit 7 of each angle register holds the angle flag. */
+ switch (axis) {
+ case IIO_MOD_X:
+ bitnum = 7 + 8 * MMA9551_TILT_YZ_ANG_REG;
+ break;
+ case IIO_MOD_Y:
+ bitnum = 7 + 8 * MMA9551_TILT_XZ_ANG_REG;
+ break;
+ case IIO_MOD_Z:
+ bitnum = 7 + 8 * MMA9551_TILT_XY_ANG_REG;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+
+ ret = mma9551_set_power_state(data->client, true);
+ if (ret < 0)
+ return ret;
+
+ ret = mma9551_gpio_config(data->client,
+ (enum mma9551_gpio_pin)mma_axis,
+ MMA9551_APPID_TILT, bitnum, 0);
+ if (ret < 0) {
+ mma9551_set_power_state(data->client, false);
+ return ret;
+ }
+ }
+
+ data->event_enabled[mma_axis] = state;
+
+ return ret;
+}
+
+static int mma9551_write_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ int state)
+{
+ struct mma9551_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (chan->type) {
+ case IIO_INCLI:
+ mutex_lock(&data->mutex);
+ ret = mma9551_config_incli_event(indio_dev,
+ chan->channel2, state);
+ mutex_unlock(&data->mutex);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int mma9551_write_event_value(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int val, int val2)
+{
+ struct mma9551_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (chan->type) {
+ case IIO_INCLI:
+ if (val2 != 0 || val < 1 || val > 10)
+ return -EINVAL;
+ mutex_lock(&data->mutex);
+ ret = mma9551_update_config_bits(data->client,
+ MMA9551_APPID_TILT,
+ MMA9551_TILT_CFG_REG,
+ MMA9551_TILT_ANG_THRESH_MASK,
+ val);
+ mutex_unlock(&data->mutex);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int mma9551_read_event_value(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int *val, int *val2)
+{
+ struct mma9551_data *data = iio_priv(indio_dev);
+ int ret;
+ u8 tmp;
+
+ switch (chan->type) {
+ case IIO_INCLI:
+ mutex_lock(&data->mutex);
+ ret = mma9551_read_config_byte(data->client,
+ MMA9551_APPID_TILT,
+ MMA9551_TILT_CFG_REG, &tmp);
+ mutex_unlock(&data->mutex);
+ if (ret < 0)
+ return ret;
+ *val = tmp & MMA9551_TILT_ANG_THRESH_MASK;
+ *val2 = 0;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+}
+
+static const struct iio_event_spec mma9551_incli_event = {
+ .type = IIO_EV_TYPE_ROC,
+ .dir = IIO_EV_DIR_RISING,
+ .mask_separate = BIT(IIO_EV_INFO_ENABLE),
+ .mask_shared_by_type = BIT(IIO_EV_INFO_VALUE),
+};
+
+#define MMA9551_INCLI_CHANNEL(axis) { \
+ .type = IIO_INCLI, \
+ .modified = 1, \
+ .channel2 = axis, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), \
+ .event_spec = &mma9551_incli_event, \
+ .num_event_specs = 1, \
+}
+
+static const struct iio_chan_spec mma9551_channels[] = {
+ MMA9551_ACCEL_CHANNEL(IIO_MOD_X),
+ MMA9551_ACCEL_CHANNEL(IIO_MOD_Y),
+ MMA9551_ACCEL_CHANNEL(IIO_MOD_Z),
+
+ MMA9551_INCLI_CHANNEL(IIO_MOD_X),
+ MMA9551_INCLI_CHANNEL(IIO_MOD_Y),
+ MMA9551_INCLI_CHANNEL(IIO_MOD_Z),
+};
+
+static const struct iio_info mma9551_info = {
+ .driver_module = THIS_MODULE,
+ .read_raw = mma9551_read_raw,
+ .read_event_config = mma9551_read_event_config,
+ .write_event_config = mma9551_write_event_config,
+ .read_event_value = mma9551_read_event_value,
+ .write_event_value = mma9551_write_event_value,
+};
+
+static irqreturn_t mma9551_event_handler(int irq, void *private)
+{
+ struct iio_dev *indio_dev = private;
+ struct mma9551_data *data = iio_priv(indio_dev);
+ int i, ret, mma_axis = -1;
+ u16 reg;
+ u8 val;
+
+ mutex_lock(&data->mutex);
+
+ for (i = 0; i < 3; i++)
+ if (irq == data->irqs[i]) {
+ mma_axis = i;
+ break;
+ }
+
+ if (mma_axis == -1) {
+ /* IRQ was triggered on 4th line, which we don't use. */
+ dev_warn(&data->client->dev,
+ "irq triggered on unused line %d\n", data->irqs[3]);
+ goto out;
+ }
+
+ switch (mma_axis) {
+ case mma9551_x:
+ reg = MMA9551_TILT_YZ_ANG_REG;
+ break;
+ case mma9551_y:
+ reg = MMA9551_TILT_XZ_ANG_REG;
+ break;
+ case mma9551_z:
+ reg = MMA9551_TILT_XY_ANG_REG;
+ break;
+ }
+
+ /*
+ * Read the angle even though we don't use it, otherwise we
+ * won't get any further interrupts.
+ */
+ ret = mma9551_read_status_byte(data->client, MMA9551_APPID_TILT,
+ reg, &val);
+ if (ret < 0) {
+ dev_err(&data->client->dev,
+ "error %d reading tilt register in IRQ\n", ret);
+ goto out;
+ }
+
+ iio_push_event(indio_dev,
+ IIO_MOD_EVENT_CODE(IIO_INCLI, 0, (mma_axis + 1),
+ IIO_EV_TYPE_ROC, IIO_EV_DIR_RISING),
+ iio_get_time_ns());
+
+out:
+ mutex_unlock(&data->mutex);
+
+ return IRQ_HANDLED;
+}
+
+static int mma9551_init(struct mma9551_data *data)
+{
+ int ret;
+
+ ret = mma9551_read_version(data->client);
+ if (ret)
+ return ret;
+
+ return mma9551_set_device_state(data->client, true);
+}
+
+static int mma9551_gpio_probe(struct iio_dev *indio_dev)
+{
+ struct gpio_desc *gpio;
+ int i, ret;
+ struct mma9551_data *data = iio_priv(indio_dev);
+ struct device *dev = &data->client->dev;
+
+ for (i = 0; i < MMA9551_GPIO_COUNT; i++) {
+ gpio = devm_gpiod_get_index(dev, MMA9551_GPIO_NAME, i,
+ GPIOD_IN);
+ if (IS_ERR(gpio)) {
+ dev_err(dev, "acpi gpio get index failed\n");
+ return PTR_ERR(gpio);
+ }
+
+ ret = gpiod_to_irq(gpio);
+ if (ret < 0)
+ return ret;
+
+ data->irqs[i] = ret;
+ ret = devm_request_threaded_irq(dev, data->irqs[i],
+ NULL, mma9551_event_handler,
+ IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+ MMA9551_IRQ_NAME, indio_dev);
+ if (ret < 0) {
+ dev_err(dev, "request irq %d failed\n", data->irqs[i]);
+ return ret;
+ }
+
+ dev_dbg(dev, "gpio resource, no:%d irq:%d\n",
+ desc_to_gpio(gpio), data->irqs[i]);
+ }
+
+ return 0;
+}
+
+static const char *mma9551_match_acpi_device(struct device *dev)
+{
+ const struct acpi_device_id *id;
+
+ id = acpi_match_device(dev->driver->acpi_match_table, dev);
+ if (!id)
+ return NULL;
+
+ return dev_name(dev);
+}
+
+static int mma9551_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct mma9551_data *data;
+ struct iio_dev *indio_dev;
+ const char *name = NULL;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+
+ if (id)
+ name = id->name;
+ else if (ACPI_HANDLE(&client->dev))
+ name = mma9551_match_acpi_device(&client->dev);
+
+ ret = mma9551_init(data);
+ if (ret < 0)
+ return ret;
+
+ mutex_init(&data->mutex);
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->channels = mma9551_channels;
+ indio_dev->num_channels = ARRAY_SIZE(mma9551_channels);
+ indio_dev->name = name;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->info = &mma9551_info;
+
+ ret = mma9551_gpio_probe(indio_dev);
+ if (ret < 0)
+ goto out_poweroff;
+
+ ret = iio_device_register(indio_dev);
+ if (ret < 0) {
+ dev_err(&client->dev, "unable to register iio device\n");
+ goto out_poweroff;
+ }
+
+ ret = pm_runtime_set_active(&client->dev);
+ if (ret < 0)
+ goto out_iio_unregister;
+
+ pm_runtime_enable(&client->dev);
+ pm_runtime_set_autosuspend_delay(&client->dev,
+ MMA9551_AUTO_SUSPEND_DELAY_MS);
+ pm_runtime_use_autosuspend(&client->dev);
+
+ return 0;
+
+out_iio_unregister:
+ iio_device_unregister(indio_dev);
+out_poweroff:
+ mma9551_set_device_state(client, false);
+
+ return ret;
+}
+
+static int mma9551_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct mma9551_data *data = iio_priv(indio_dev);
+
+ pm_runtime_disable(&client->dev);
+ pm_runtime_set_suspended(&client->dev);
+ pm_runtime_put_noidle(&client->dev);
+
+ iio_device_unregister(indio_dev);
+ mutex_lock(&data->mutex);
+ mma9551_set_device_state(data->client, false);
+ mutex_unlock(&data->mutex);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int mma9551_runtime_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct mma9551_data *data = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&data->mutex);
+ ret = mma9551_set_device_state(data->client, false);
+ mutex_unlock(&data->mutex);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "powering off device failed\n");
+ return -EAGAIN;
+ }
+
+ return 0;
+}
+
+static int mma9551_runtime_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct mma9551_data *data = iio_priv(indio_dev);
+ int ret;
+
+ ret = mma9551_set_device_state(data->client, true);
+ if (ret < 0)
+ return ret;
+
+ mma9551_sleep(MMA9551_DEFAULT_SAMPLE_RATE);
+
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_PM_SLEEP
+static int mma9551_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct mma9551_data *data = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&data->mutex);
+ ret = mma9551_set_device_state(data->client, false);
+ mutex_unlock(&data->mutex);
+
+ return ret;
+}
+
+static int mma9551_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct mma9551_data *data = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&data->mutex);
+ ret = mma9551_set_device_state(data->client, true);
+ mutex_unlock(&data->mutex);
+
+ return ret;
+}
+#endif
+
+static const struct dev_pm_ops mma9551_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(mma9551_suspend, mma9551_resume)
+ SET_RUNTIME_PM_OPS(mma9551_runtime_suspend,
+ mma9551_runtime_resume, NULL)
+};
+
+static const struct acpi_device_id mma9551_acpi_match[] = {
+ {"MMA9551", 0},
+ {},
+};
+
+MODULE_DEVICE_TABLE(acpi, mma9551_acpi_match);
+
+static const struct i2c_device_id mma9551_id[] = {
+ {"mma9551", 0},
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, mma9551_id);
+
+static struct i2c_driver mma9551_driver = {
+ .driver = {
+ .name = MMA9551_DRV_NAME,
+ .acpi_match_table = ACPI_PTR(mma9551_acpi_match),
+ .pm = &mma9551_pm_ops,
+ },
+ .probe = mma9551_probe,
+ .remove = mma9551_remove,
+ .id_table = mma9551_id,
+};
+
+module_i2c_driver(mma9551_driver);
+
+MODULE_AUTHOR("Irina Tirdea <irina.tirdea@intel.com>");
+MODULE_AUTHOR("Vlad Dogaru <vlad.dogaru@intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("MMA9551L motion-sensing platform driver");
diff --git a/drivers/iio/accel/mma9551_core.c b/drivers/iio/accel/mma9551_core.c
new file mode 100644
index 000000000..c6d5a3a40
--- /dev/null
+++ b/drivers/iio/accel/mma9551_core.c
@@ -0,0 +1,813 @@
+/*
+ * Common code for Freescale MMA955x Intelligent Sensor Platform drivers
+ * Copyright (c) 2014, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/iio/iio.h>
+#include <linux/pm_runtime.h>
+#include "mma9551_core.h"
+
+/* Command masks for mailbox write command */
+#define MMA9551_CMD_READ_VERSION_INFO 0x00
+#define MMA9551_CMD_READ_CONFIG 0x10
+#define MMA9551_CMD_WRITE_CONFIG 0x20
+#define MMA9551_CMD_READ_STATUS 0x30
+
+/* Mailbox read command */
+#define MMA9551_RESPONSE_COCO BIT(7)
+
+/* Error-Status codes returned in mailbox read command */
+#define MMA9551_MCI_ERROR_NONE 0x00
+#define MMA9551_MCI_ERROR_PARAM 0x04
+#define MMA9551_MCI_INVALID_COUNT 0x19
+#define MMA9551_MCI_ERROR_COMMAND 0x1C
+#define MMA9551_MCI_ERROR_INVALID_LENGTH 0x21
+#define MMA9551_MCI_ERROR_FIFO_BUSY 0x22
+#define MMA9551_MCI_ERROR_FIFO_ALLOCATED 0x23
+#define MMA9551_MCI_ERROR_FIFO_OVERSIZE 0x24
+
+/* GPIO Application */
+#define MMA9551_GPIO_POL_MSB 0x08
+#define MMA9551_GPIO_POL_LSB 0x09
+
+/* Sleep/Wake application */
+#define MMA9551_SLEEP_CFG 0x06
+#define MMA9551_SLEEP_CFG_SNCEN BIT(0)
+#define MMA9551_SLEEP_CFG_FLEEN BIT(1)
+#define MMA9551_SLEEP_CFG_SCHEN BIT(2)
+
+/* AFE application */
+#define MMA9551_AFE_X_ACCEL_REG 0x00
+#define MMA9551_AFE_Y_ACCEL_REG 0x02
+#define MMA9551_AFE_Z_ACCEL_REG 0x04
+
+/* Reset/Suspend/Clear application */
+#define MMA9551_RSC_RESET 0x00
+#define MMA9551_RSC_OFFSET(mask) (3 - (ffs(mask) - 1) / 8)
+#define MMA9551_RSC_VAL(mask) (mask >> (((ffs(mask) - 1) / 8) * 8))
+
+/*
+ * A response is composed of:
+ * - control registers: MB0-3
+ * - data registers: MB4-31
+ *
+ * A request is composed of:
+ * - mbox to write to (always 0)
+ * - control registers: MB1-4
+ * - data registers: MB5-31
+ */
+#define MMA9551_MAILBOX_CTRL_REGS 4
+#define MMA9551_MAX_MAILBOX_DATA_REGS 28
+#define MMA9551_MAILBOX_REGS 32
+
+#define MMA9551_I2C_READ_RETRIES 5
+#define MMA9551_I2C_READ_DELAY 50 /* us */
+
+struct mma9551_mbox_request {
+ u8 start_mbox; /* Always 0. */
+ u8 app_id;
+ /*
+ * See Section 5.3.1 of the MMA955xL Software Reference Manual.
+ *
+ * Bit 7: reserved, always 0
+ * Bits 6-4: command
+ * Bits 3-0: upper bits of register offset
+ */
+ u8 cmd_off;
+ u8 lower_off;
+ u8 nbytes;
+ u8 buf[MMA9551_MAX_MAILBOX_DATA_REGS - 1];
+} __packed;
+
+struct mma9551_mbox_response {
+ u8 app_id;
+ /*
+ * See Section 5.3.3 of the MMA955xL Software Reference Manual.
+ *
+ * Bit 7: COCO
+ * Bits 6-0: Error code.
+ */
+ u8 coco_err;
+ u8 nbytes;
+ u8 req_bytes;
+ u8 buf[MMA9551_MAX_MAILBOX_DATA_REGS];
+} __packed;
+
+struct mma9551_version_info {
+ __be32 device_id;
+ u8 rom_version[2];
+ u8 fw_version[2];
+ u8 hw_version[2];
+ u8 fw_build[2];
+};
+
+static int mma9551_transfer(struct i2c_client *client,
+ u8 app_id, u8 command, u16 offset,
+ u8 *inbytes, int num_inbytes,
+ u8 *outbytes, int num_outbytes)
+{
+ struct mma9551_mbox_request req;
+ struct mma9551_mbox_response rsp;
+ struct i2c_msg in, out;
+ u8 req_len, err_code;
+ int ret, retries;
+
+ if (offset >= 1 << 12) {
+ dev_err(&client->dev, "register offset too large\n");
+ return -EINVAL;
+ }
+
+ req_len = 1 + MMA9551_MAILBOX_CTRL_REGS + num_inbytes;
+ req.start_mbox = 0;
+ req.app_id = app_id;
+ req.cmd_off = command | (offset >> 8);
+ req.lower_off = offset;
+
+ if (command == MMA9551_CMD_WRITE_CONFIG)
+ req.nbytes = num_inbytes;
+ else
+ req.nbytes = num_outbytes;
+ if (num_inbytes)
+ memcpy(req.buf, inbytes, num_inbytes);
+
+ out.addr = client->addr;
+ out.flags = 0;
+ out.len = req_len;
+ out.buf = (u8 *)&req;
+
+ ret = i2c_transfer(client->adapter, &out, 1);
+ if (ret < 0) {
+ dev_err(&client->dev, "i2c write failed\n");
+ return ret;
+ }
+
+ retries = MMA9551_I2C_READ_RETRIES;
+ do {
+ udelay(MMA9551_I2C_READ_DELAY);
+
+ in.addr = client->addr;
+ in.flags = I2C_M_RD;
+ in.len = sizeof(rsp);
+ in.buf = (u8 *)&rsp;
+
+ ret = i2c_transfer(client->adapter, &in, 1);
+ if (ret < 0) {
+ dev_err(&client->dev, "i2c read failed\n");
+ return ret;
+ }
+
+ if (rsp.coco_err & MMA9551_RESPONSE_COCO)
+ break;
+ } while (--retries > 0);
+
+ if (retries == 0) {
+ dev_err(&client->dev,
+ "timed out while waiting for command response\n");
+ return -ETIMEDOUT;
+ }
+
+ if (rsp.app_id != app_id) {
+ dev_err(&client->dev,
+ "app_id mismatch in response got %02x expected %02x\n",
+ rsp.app_id, app_id);
+ return -EINVAL;
+ }
+
+ err_code = rsp.coco_err & ~MMA9551_RESPONSE_COCO;
+ if (err_code != MMA9551_MCI_ERROR_NONE) {
+ dev_err(&client->dev, "read returned error %x\n", err_code);
+ return -EINVAL;
+ }
+
+ if (rsp.nbytes != rsp.req_bytes) {
+ dev_err(&client->dev,
+ "output length mismatch got %d expected %d\n",
+ rsp.nbytes, rsp.req_bytes);
+ return -EINVAL;
+ }
+
+ if (num_outbytes)
+ memcpy(outbytes, rsp.buf, num_outbytes);
+
+ return 0;
+}
+
+/**
+ * mma9551_read_config_byte() - read 1 configuration byte
+ * @client: I2C client
+ * @app_id: Application ID
+ * @reg: Application register
+ * @val: Pointer to store value read
+ *
+ * Read one configuration byte from the device using MMA955xL command format.
+ * Commands to the MMA955xL platform consist of a write followed
+ * by one or more reads.
+ *
+ * Locking note: This function must be called with the device lock held.
+ * Locking is not handled inside the function. Callers should ensure they
+ * serialize access to the HW.
+ *
+ * Returns: 0 on success, negative value on failure.
+ */
+int mma9551_read_config_byte(struct i2c_client *client, u8 app_id,
+ u16 reg, u8 *val)
+{
+ return mma9551_transfer(client, app_id, MMA9551_CMD_READ_CONFIG,
+ reg, NULL, 0, val, 1);
+}
+EXPORT_SYMBOL(mma9551_read_config_byte);
+
+/**
+ * mma9551_write_config_byte() - write 1 configuration byte
+ * @client: I2C client
+ * @app_id: Application ID
+ * @reg: Application register
+ * @val: Value to write
+ *
+ * Write one configuration byte from the device using MMA955xL command format.
+ * Commands to the MMA955xL platform consist of a write followed by one or
+ * more reads.
+ *
+ * Locking note: This function must be called with the device lock held.
+ * Locking is not handled inside the function. Callers should ensure they
+ * serialize access to the HW.
+ *
+ * Returns: 0 on success, negative value on failure.
+ */
+int mma9551_write_config_byte(struct i2c_client *client, u8 app_id,
+ u16 reg, u8 val)
+{
+ return mma9551_transfer(client, app_id, MMA9551_CMD_WRITE_CONFIG, reg,
+ &val, 1, NULL, 0);
+}
+EXPORT_SYMBOL(mma9551_write_config_byte);
+
+/**
+ * mma9551_read_status_byte() - read 1 status byte
+ * @client: I2C client
+ * @app_id: Application ID
+ * @reg: Application register
+ * @val: Pointer to store value read
+ *
+ * Read one status byte from the device using MMA955xL command format.
+ * Commands to the MMA955xL platform consist of a write followed by one or
+ * more reads.
+ *
+ * Locking note: This function must be called with the device lock held.
+ * Locking is not handled inside the function. Callers should ensure they
+ * serialize access to the HW.
+ *
+ * Returns: 0 on success, negative value on failure.
+ */
+int mma9551_read_status_byte(struct i2c_client *client, u8 app_id,
+ u16 reg, u8 *val)
+{
+ return mma9551_transfer(client, app_id, MMA9551_CMD_READ_STATUS,
+ reg, NULL, 0, val, 1);
+}
+EXPORT_SYMBOL(mma9551_read_status_byte);
+
+/**
+ * mma9551_read_config_word() - read 1 config word
+ * @client: I2C client
+ * @app_id: Application ID
+ * @reg: Application register
+ * @val: Pointer to store value read
+ *
+ * Read one configuration word from the device using MMA955xL command format.
+ * Commands to the MMA955xL platform consist of a write followed by one or
+ * more reads.
+ *
+ * Locking note: This function must be called with the device lock held.
+ * Locking is not handled inside the function. Callers should ensure they
+ * serialize access to the HW.
+ *
+ * Returns: 0 on success, negative value on failure.
+ */
+int mma9551_read_config_word(struct i2c_client *client, u8 app_id,
+ u16 reg, u16 *val)
+{
+ int ret;
+ __be16 v;
+
+ ret = mma9551_transfer(client, app_id, MMA9551_CMD_READ_CONFIG,
+ reg, NULL, 0, (u8 *)&v, 2);
+ *val = be16_to_cpu(v);
+
+ return ret;
+}
+EXPORT_SYMBOL(mma9551_read_config_word);
+
+/**
+ * mma9551_write_config_word() - write 1 config word
+ * @client: I2C client
+ * @app_id: Application ID
+ * @reg: Application register
+ * @val: Value to write
+ *
+ * Write one configuration word from the device using MMA955xL command format.
+ * Commands to the MMA955xL platform consist of a write followed by one or
+ * more reads.
+ *
+ * Locking note: This function must be called with the device lock held.
+ * Locking is not handled inside the function. Callers should ensure they
+ * serialize access to the HW.
+ *
+ * Returns: 0 on success, negative value on failure.
+ */
+int mma9551_write_config_word(struct i2c_client *client, u8 app_id,
+ u16 reg, u16 val)
+{
+ __be16 v = cpu_to_be16(val);
+
+ return mma9551_transfer(client, app_id, MMA9551_CMD_WRITE_CONFIG, reg,
+ (u8 *) &v, 2, NULL, 0);
+}
+EXPORT_SYMBOL(mma9551_write_config_word);
+
+/**
+ * mma9551_read_status_word() - read 1 status word
+ * @client: I2C client
+ * @app_id: Application ID
+ * @reg: Application register
+ * @val: Pointer to store value read
+ *
+ * Read one status word from the device using MMA955xL command format.
+ * Commands to the MMA955xL platform consist of a write followed by one or
+ * more reads.
+ *
+ * Locking note: This function must be called with the device lock held.
+ * Locking is not handled inside the function. Callers should ensure they
+ * serialize access to the HW.
+ *
+ * Returns: 0 on success, negative value on failure.
+ */
+int mma9551_read_status_word(struct i2c_client *client, u8 app_id,
+ u16 reg, u16 *val)
+{
+ int ret;
+ __be16 v;
+
+ ret = mma9551_transfer(client, app_id, MMA9551_CMD_READ_STATUS,
+ reg, NULL, 0, (u8 *)&v, 2);
+ *val = be16_to_cpu(v);
+
+ return ret;
+}
+EXPORT_SYMBOL(mma9551_read_status_word);
+
+/**
+ * mma9551_read_config_words() - read multiple config words
+ * @client: I2C client
+ * @app_id: Application ID
+ * @reg: Application register
+ * @len: Length of array to read in bytes
+ * @val: Array of words to read
+ *
+ * Read multiple configuration registers (word-sized registers).
+ *
+ * Locking note: This function must be called with the device lock held.
+ * Locking is not handled inside the function. Callers should ensure they
+ * serialize access to the HW.
+ *
+ * Returns: 0 on success, negative value on failure.
+ */
+int mma9551_read_config_words(struct i2c_client *client, u8 app_id,
+ u16 reg, u8 len, u16 *buf)
+{
+ int ret, i;
+ int len_words = len / sizeof(u16);
+ __be16 be_buf[MMA9551_MAX_MAILBOX_DATA_REGS / 2];
+
+ if (len_words > ARRAY_SIZE(be_buf)) {
+ dev_err(&client->dev, "Invalid buffer size %d\n", len);
+ return -EINVAL;
+ }
+
+ ret = mma9551_transfer(client, app_id, MMA9551_CMD_READ_CONFIG,
+ reg, NULL, 0, (u8 *) be_buf, len);
+ if (ret < 0)
+ return ret;
+
+ for (i = 0; i < len_words; i++)
+ buf[i] = be16_to_cpu(be_buf[i]);
+
+ return 0;
+}
+EXPORT_SYMBOL(mma9551_read_config_words);
+
+/**
+ * mma9551_read_status_words() - read multiple status words
+ * @client: I2C client
+ * @app_id: Application ID
+ * @reg: Application register
+ * @len: Length of array to read in bytes
+ * @val: Array of words to read
+ *
+ * Read multiple status registers (word-sized registers).
+ *
+ * Locking note: This function must be called with the device lock held.
+ * Locking is not handled inside the function. Callers should ensure they
+ * serialize access to the HW.
+ *
+ * Returns: 0 on success, negative value on failure.
+ */
+int mma9551_read_status_words(struct i2c_client *client, u8 app_id,
+ u16 reg, u8 len, u16 *buf)
+{
+ int ret, i;
+ int len_words = len / sizeof(u16);
+ __be16 be_buf[MMA9551_MAX_MAILBOX_DATA_REGS / 2];
+
+ if (len_words > ARRAY_SIZE(be_buf)) {
+ dev_err(&client->dev, "Invalid buffer size %d\n", len);
+ return -EINVAL;
+ }
+
+ ret = mma9551_transfer(client, app_id, MMA9551_CMD_READ_STATUS,
+ reg, NULL, 0, (u8 *) be_buf, len);
+ if (ret < 0)
+ return ret;
+
+ for (i = 0; i < len_words; i++)
+ buf[i] = be16_to_cpu(be_buf[i]);
+
+ return 0;
+}
+EXPORT_SYMBOL(mma9551_read_status_words);
+
+/**
+ * mma9551_write_config_words() - write multiple config words
+ * @client: I2C client
+ * @app_id: Application ID
+ * @reg: Application register
+ * @len: Length of array to write in bytes
+ * @val: Array of words to write
+ *
+ * Write multiple configuration registers (word-sized registers).
+ *
+ * Locking note: This function must be called with the device lock held.
+ * Locking is not handled inside the function. Callers should ensure they
+ * serialize access to the HW.
+ *
+ * Returns: 0 on success, negative value on failure.
+ */
+int mma9551_write_config_words(struct i2c_client *client, u8 app_id,
+ u16 reg, u8 len, u16 *buf)
+{
+ int i;
+ int len_words = len / sizeof(u16);
+ __be16 be_buf[(MMA9551_MAX_MAILBOX_DATA_REGS - 1) / 2];
+
+ if (len_words > ARRAY_SIZE(be_buf)) {
+ dev_err(&client->dev, "Invalid buffer size %d\n", len);
+ return -EINVAL;
+ }
+
+ for (i = 0; i < len_words; i++)
+ be_buf[i] = cpu_to_be16(buf[i]);
+
+ return mma9551_transfer(client, app_id, MMA9551_CMD_WRITE_CONFIG,
+ reg, (u8 *) be_buf, len, NULL, 0);
+}
+EXPORT_SYMBOL(mma9551_write_config_words);
+
+/**
+ * mma9551_update_config_bits() - update bits in register
+ * @client: I2C client
+ * @app_id: Application ID
+ * @reg: Application register
+ * @mask: Mask for the bits to update
+ * @val: Value of the bits to update
+ *
+ * Update bits in the given register using a bit mask.
+ *
+ * Locking note: This function must be called with the device lock held.
+ * Locking is not handled inside the function. Callers should ensure they
+ * serialize access to the HW.
+ *
+ * Returns: 0 on success, negative value on failure.
+ */
+int mma9551_update_config_bits(struct i2c_client *client, u8 app_id,
+ u16 reg, u8 mask, u8 val)
+{
+ int ret;
+ u8 tmp, orig;
+
+ ret = mma9551_read_config_byte(client, app_id, reg, &orig);
+ if (ret < 0)
+ return ret;
+
+ tmp = orig & ~mask;
+ tmp |= val & mask;
+
+ if (tmp == orig)
+ return 0;
+
+ return mma9551_write_config_byte(client, app_id, reg, tmp);
+}
+EXPORT_SYMBOL(mma9551_update_config_bits);
+
+/**
+ * mma9551_gpio_config() - configure gpio
+ * @client: I2C client
+ * @pin: GPIO pin to configure
+ * @app_id: Application ID
+ * @bitnum: Bit number of status register being assigned to the GPIO pin.
+ * @polarity: The polarity parameter is described in section 6.2.2, page 66,
+ * of the Software Reference Manual. Basically, polarity=0 means
+ * the interrupt line has the same value as the selected bit,
+ * while polarity=1 means the line is inverted.
+ *
+ * Assign a bit from an application’s status register to a specific GPIO pin.
+ *
+ * Locking note: This function must be called with the device lock held.
+ * Locking is not handled inside the function. Callers should ensure they
+ * serialize access to the HW.
+ *
+ * Returns: 0 on success, negative value on failure.
+ */
+int mma9551_gpio_config(struct i2c_client *client, enum mma9551_gpio_pin pin,
+ u8 app_id, u8 bitnum, int polarity)
+{
+ u8 reg, pol_mask, pol_val;
+ int ret;
+
+ if (pin > mma9551_gpio_max) {
+ dev_err(&client->dev, "bad GPIO pin\n");
+ return -EINVAL;
+ }
+
+ /*
+ * Pin 6 is configured by regs 0x00 and 0x01, pin 7 by 0x02 and
+ * 0x03, and so on.
+ */
+ reg = pin * 2;
+
+ ret = mma9551_write_config_byte(client, MMA9551_APPID_GPIO,
+ reg, app_id);
+ if (ret < 0) {
+ dev_err(&client->dev, "error setting GPIO app_id\n");
+ return ret;
+ }
+
+ ret = mma9551_write_config_byte(client, MMA9551_APPID_GPIO,
+ reg + 1, bitnum);
+ if (ret < 0) {
+ dev_err(&client->dev, "error setting GPIO bit number\n");
+ return ret;
+ }
+
+ switch (pin) {
+ case mma9551_gpio6:
+ reg = MMA9551_GPIO_POL_LSB;
+ pol_mask = 1 << 6;
+ break;
+ case mma9551_gpio7:
+ reg = MMA9551_GPIO_POL_LSB;
+ pol_mask = 1 << 7;
+ break;
+ case mma9551_gpio8:
+ reg = MMA9551_GPIO_POL_MSB;
+ pol_mask = 1 << 0;
+ break;
+ case mma9551_gpio9:
+ reg = MMA9551_GPIO_POL_MSB;
+ pol_mask = 1 << 1;
+ break;
+ }
+ pol_val = polarity ? pol_mask : 0;
+
+ ret = mma9551_update_config_bits(client, MMA9551_APPID_GPIO, reg,
+ pol_mask, pol_val);
+ if (ret < 0)
+ dev_err(&client->dev, "error setting GPIO polarity\n");
+
+ return ret;
+}
+EXPORT_SYMBOL(mma9551_gpio_config);
+
+/**
+ * mma9551_read_version() - read device version information
+ * @client: I2C client
+ *
+ * Read version information and print device id and firmware version.
+ *
+ * Locking note: This function must be called with the device lock held.
+ * Locking is not handled inside the function. Callers should ensure they
+ * serialize access to the HW.
+ *
+ * Returns: 0 on success, negative value on failure.
+ */
+int mma9551_read_version(struct i2c_client *client)
+{
+ struct mma9551_version_info info;
+ int ret;
+
+ ret = mma9551_transfer(client, MMA9551_APPID_VERSION, 0x00, 0x00,
+ NULL, 0, (u8 *)&info, sizeof(info));
+ if (ret < 0)
+ return ret;
+
+ dev_info(&client->dev, "device ID 0x%x, firmware version %02x.%02x\n",
+ be32_to_cpu(info.device_id), info.fw_version[0],
+ info.fw_version[1]);
+
+ return 0;
+}
+EXPORT_SYMBOL(mma9551_read_version);
+
+/**
+ * mma9551_set_device_state() - sets HW power mode
+ * @client: I2C client
+ * @enable: Use true to power on device, false to cause the device
+ * to enter sleep.
+ *
+ * Set power on/off for device using the Sleep/Wake Application.
+ * When enable is true, power on chip and enable doze mode.
+ * When enable is false, enter sleep mode (device remains in the
+ * lowest-power mode).
+ *
+ * Locking note: This function must be called with the device lock held.
+ * Locking is not handled inside the function. Callers should ensure they
+ * serialize access to the HW.
+ *
+ * Returns: 0 on success, negative value on failure.
+ */
+int mma9551_set_device_state(struct i2c_client *client, bool enable)
+{
+ return mma9551_update_config_bits(client, MMA9551_APPID_SLEEP_WAKE,
+ MMA9551_SLEEP_CFG,
+ MMA9551_SLEEP_CFG_SNCEN |
+ MMA9551_SLEEP_CFG_FLEEN |
+ MMA9551_SLEEP_CFG_SCHEN,
+ enable ? MMA9551_SLEEP_CFG_SCHEN |
+ MMA9551_SLEEP_CFG_FLEEN :
+ MMA9551_SLEEP_CFG_SNCEN);
+}
+EXPORT_SYMBOL(mma9551_set_device_state);
+
+/**
+ * mma9551_set_power_state() - sets runtime PM state
+ * @client: I2C client
+ * @on: Use true to power on device, false to power off
+ *
+ * Resume or suspend the device using Runtime PM.
+ * The device will suspend after the autosuspend delay.
+ *
+ * Returns: 0 on success, negative value on failure.
+ */
+int mma9551_set_power_state(struct i2c_client *client, bool on)
+{
+#ifdef CONFIG_PM
+ int ret;
+
+ if (on)
+ ret = pm_runtime_get_sync(&client->dev);
+ else {
+ pm_runtime_mark_last_busy(&client->dev);
+ ret = pm_runtime_put_autosuspend(&client->dev);
+ }
+
+ if (ret < 0) {
+ dev_err(&client->dev,
+ "failed to change power state to %d\n", on);
+ if (on)
+ pm_runtime_put_noidle(&client->dev);
+
+ return ret;
+ }
+#endif
+
+ return 0;
+}
+EXPORT_SYMBOL(mma9551_set_power_state);
+
+/**
+ * mma9551_sleep() - sleep
+ * @freq: Application frequency
+ *
+ * Firmware applications run at a certain frequency on the
+ * device. Sleep for one application cycle to make sure the
+ * application had time to run once and initialize set values.
+ */
+void mma9551_sleep(int freq)
+{
+ int sleep_val = 1000 / freq;
+
+ if (sleep_val < 20)
+ usleep_range(sleep_val * 1000, 20000);
+ else
+ msleep_interruptible(sleep_val);
+}
+EXPORT_SYMBOL(mma9551_sleep);
+
+/**
+ * mma9551_read_accel_chan() - read accelerometer channel
+ * @client: I2C client
+ * @chan: IIO channel
+ * @val: Pointer to the accelerometer value read
+ * @val2: Unused
+ *
+ * Read accelerometer value for the specified channel.
+ *
+ * Locking note: This function must be called with the device lock held.
+ * Locking is not handled inside the function. Callers should ensure they
+ * serialize access to the HW.
+ *
+ * Returns: IIO_VAL_INT on success, negative value on failure.
+ */
+int mma9551_read_accel_chan(struct i2c_client *client,
+ const struct iio_chan_spec *chan,
+ int *val, int *val2)
+{
+ u16 reg_addr;
+ s16 raw_accel;
+ int ret;
+
+ switch (chan->channel2) {
+ case IIO_MOD_X:
+ reg_addr = MMA9551_AFE_X_ACCEL_REG;
+ break;
+ case IIO_MOD_Y:
+ reg_addr = MMA9551_AFE_Y_ACCEL_REG;
+ break;
+ case IIO_MOD_Z:
+ reg_addr = MMA9551_AFE_Z_ACCEL_REG;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = mma9551_set_power_state(client, true);
+ if (ret < 0)
+ return ret;
+
+ ret = mma9551_read_status_word(client, MMA9551_APPID_AFE,
+ reg_addr, &raw_accel);
+ if (ret < 0)
+ goto out_poweroff;
+
+ *val = raw_accel;
+
+ ret = IIO_VAL_INT;
+
+out_poweroff:
+ mma9551_set_power_state(client, false);
+ return ret;
+}
+EXPORT_SYMBOL(mma9551_read_accel_chan);
+
+/**
+ * mma9551_read_accel_scale() - read accelerometer scale
+ * @val: Pointer to the accelerometer scale (int value)
+ * @val2: Pointer to the accelerometer scale (micro value)
+ *
+ * Read accelerometer scale.
+ *
+ * Returns: IIO_VAL_INT_PLUS_MICRO.
+ */
+int mma9551_read_accel_scale(int *val, int *val2)
+{
+ *val = 0;
+ *val2 = 2440;
+
+ return IIO_VAL_INT_PLUS_MICRO;
+}
+EXPORT_SYMBOL(mma9551_read_accel_scale);
+
+/**
+ * mma9551_app_reset() - reset application
+ * @client: I2C client
+ * @app_mask: Application to reset
+ *
+ * Reset the given application (using the Reset/Suspend/Clear
+ * Control Application)
+ *
+ * Returns: 0 on success, negative value on failure.
+ */
+int mma9551_app_reset(struct i2c_client *client, u32 app_mask)
+{
+ return mma9551_write_config_byte(client, MMA9551_APPID_RCS,
+ MMA9551_RSC_RESET +
+ MMA9551_RSC_OFFSET(app_mask),
+ MMA9551_RSC_VAL(app_mask));
+}
+EXPORT_SYMBOL(mma9551_app_reset);
+
+MODULE_AUTHOR("Irina Tirdea <irina.tirdea@intel.com>");
+MODULE_AUTHOR("Vlad Dogaru <vlad.dogaru@intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("MMA955xL sensors core");
diff --git a/drivers/iio/accel/mma9551_core.h b/drivers/iio/accel/mma9551_core.h
new file mode 100644
index 000000000..edaa56b10
--- /dev/null
+++ b/drivers/iio/accel/mma9551_core.h
@@ -0,0 +1,81 @@
+/*
+ * Common code for Freescale MMA955x Intelligent Sensor Platform drivers
+ * Copyright (c) 2014, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#ifndef _MMA9551_CORE_H_
+#define _MMA9551_CORE_H_
+
+/* Applications IDs */
+#define MMA9551_APPID_VERSION 0x00
+#define MMA9551_APPID_GPIO 0x03
+#define MMA9551_APPID_AFE 0x06
+#define MMA9551_APPID_TILT 0x0B
+#define MMA9551_APPID_SLEEP_WAKE 0x12
+#define MMA9551_APPID_PEDOMETER 0x15
+#define MMA9551_APPID_RCS 0x17
+#define MMA9551_APPID_NONE 0xff
+
+/* Reset/Suspend/Clear application app masks */
+#define MMA9551_RSC_PED BIT(21)
+
+#define MMA9551_AUTO_SUSPEND_DELAY_MS 2000
+
+enum mma9551_gpio_pin {
+ mma9551_gpio6 = 0,
+ mma9551_gpio7,
+ mma9551_gpio8,
+ mma9551_gpio9,
+ mma9551_gpio_max = mma9551_gpio9,
+};
+
+#define MMA9551_ACCEL_CHANNEL(axis) { \
+ .type = IIO_ACCEL, \
+ .modified = 1, \
+ .channel2 = axis, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
+}
+
+int mma9551_read_config_byte(struct i2c_client *client, u8 app_id,
+ u16 reg, u8 *val);
+int mma9551_write_config_byte(struct i2c_client *client, u8 app_id,
+ u16 reg, u8 val);
+int mma9551_read_status_byte(struct i2c_client *client, u8 app_id,
+ u16 reg, u8 *val);
+int mma9551_read_config_word(struct i2c_client *client, u8 app_id,
+ u16 reg, u16 *val);
+int mma9551_write_config_word(struct i2c_client *client, u8 app_id,
+ u16 reg, u16 val);
+int mma9551_read_status_word(struct i2c_client *client, u8 app_id,
+ u16 reg, u16 *val);
+int mma9551_read_config_words(struct i2c_client *client, u8 app_id,
+ u16 reg, u8 len, u16 *buf);
+int mma9551_read_status_words(struct i2c_client *client, u8 app_id,
+ u16 reg, u8 len, u16 *buf);
+int mma9551_write_config_words(struct i2c_client *client, u8 app_id,
+ u16 reg, u8 len, u16 *buf);
+int mma9551_update_config_bits(struct i2c_client *client, u8 app_id,
+ u16 reg, u8 mask, u8 val);
+int mma9551_gpio_config(struct i2c_client *client, enum mma9551_gpio_pin pin,
+ u8 app_id, u8 bitnum, int polarity);
+int mma9551_read_version(struct i2c_client *client);
+int mma9551_set_device_state(struct i2c_client *client, bool enable);
+int mma9551_set_power_state(struct i2c_client *client, bool on);
+void mma9551_sleep(int freq);
+int mma9551_read_accel_chan(struct i2c_client *client,
+ const struct iio_chan_spec *chan,
+ int *val, int *val2);
+int mma9551_read_accel_scale(int *val, int *val2);
+int mma9551_app_reset(struct i2c_client *client, u32 app_mask);
+
+#endif /* _MMA9551_CORE_H_ */
diff --git a/drivers/iio/accel/mma9553.c b/drivers/iio/accel/mma9553.c
new file mode 100644
index 000000000..365a109aa
--- /dev/null
+++ b/drivers/iio/accel/mma9553.c
@@ -0,0 +1,1332 @@
+/*
+ * Freescale MMA9553L Intelligent Pedometer driver
+ * Copyright (c) 2014, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+#include <linux/acpi.h>
+#include <linux/gpio/consumer.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/events.h>
+#include <linux/pm_runtime.h>
+#include "mma9551_core.h"
+
+#define MMA9553_DRV_NAME "mma9553"
+#define MMA9553_IRQ_NAME "mma9553_event"
+#define MMA9553_GPIO_NAME "mma9553_int"
+
+/* Pedometer configuration registers (R/W) */
+#define MMA9553_REG_CONF_SLEEPMIN 0x00
+#define MMA9553_REG_CONF_SLEEPMAX 0x02
+#define MMA9553_REG_CONF_SLEEPTHD 0x04
+#define MMA9553_MASK_CONF_WORD GENMASK(15, 0)
+
+#define MMA9553_REG_CONF_CONF_STEPLEN 0x06
+#define MMA9553_MASK_CONF_CONFIG BIT(15)
+#define MMA9553_MASK_CONF_ACT_DBCNTM BIT(14)
+#define MMA9553_MASK_CONF_SLP_DBCNTM BIT(13)
+#define MMA9553_MASK_CONF_STEPLEN GENMASK(7, 0)
+
+#define MMA9553_REG_CONF_HEIGHT_WEIGHT 0x08
+#define MMA9553_MASK_CONF_HEIGHT GENMASK(15, 8)
+#define MMA9553_MASK_CONF_WEIGHT GENMASK(7, 0)
+
+#define MMA9553_REG_CONF_FILTER 0x0A
+#define MMA9553_MASK_CONF_FILTSTEP GENMASK(15, 8)
+#define MMA9553_MASK_CONF_MALE BIT(7)
+#define MMA9553_MASK_CONF_FILTTIME GENMASK(6, 0)
+
+#define MMA9553_REG_CONF_SPEED_STEP 0x0C
+#define MMA9553_MASK_CONF_SPDPRD GENMASK(15, 8)
+#define MMA9553_MASK_CONF_STEPCOALESCE GENMASK(7, 0)
+
+#define MMA9553_REG_CONF_ACTTHD 0x0E
+#define MMA9553_MAX_ACTTHD GENMASK(15, 0)
+
+/* Pedometer status registers (R-only) */
+#define MMA9553_REG_STATUS 0x00
+#define MMA9553_MASK_STATUS_MRGFL BIT(15)
+#define MMA9553_MASK_STATUS_SUSPCHG BIT(14)
+#define MMA9553_MASK_STATUS_STEPCHG BIT(13)
+#define MMA9553_MASK_STATUS_ACTCHG BIT(12)
+#define MMA9553_MASK_STATUS_SUSP BIT(11)
+#define MMA9553_MASK_STATUS_ACTIVITY (BIT(10) | BIT(9) | BIT(8))
+#define MMA9553_MASK_STATUS_VERSION 0x00FF
+
+#define MMA9553_REG_STEPCNT 0x02
+#define MMA9553_REG_DISTANCE 0x04
+#define MMA9553_REG_SPEED 0x06
+#define MMA9553_REG_CALORIES 0x08
+#define MMA9553_REG_SLEEPCNT 0x0A
+
+/* Pedometer events are always mapped to this pin. */
+#define MMA9553_DEFAULT_GPIO_PIN mma9551_gpio6
+#define MMA9553_DEFAULT_GPIO_POLARITY 0
+
+/* Bitnum used for gpio configuration = bit number in high status byte */
+#define STATUS_TO_BITNUM(bit) (ffs(bit) - 9)
+
+#define MMA9553_DEFAULT_SAMPLE_RATE 30 /* Hz */
+
+/*
+ * The internal activity level must be stable for ACTTHD samples before
+ * ACTIVITY is updated.The ACTIVITY variable contains the current activity
+ * level and is updated every time a step is detected or once a second
+ * if there are no steps.
+ */
+#define MMA9553_ACTIVITY_THD_TO_SEC(thd) ((thd) / MMA9553_DEFAULT_SAMPLE_RATE)
+#define MMA9553_ACTIVITY_SEC_TO_THD(sec) ((sec) * MMA9553_DEFAULT_SAMPLE_RATE)
+
+/*
+ * Autonomously suspend pedometer if acceleration vector magnitude
+ * is near 1g (4096 at 0.244 mg/LSB resolution) for 30 seconds.
+ */
+#define MMA9553_DEFAULT_SLEEPMIN 3688 /* 0,9 g */
+#define MMA9553_DEFAULT_SLEEPMAX 4508 /* 1,1 g */
+#define MMA9553_DEFAULT_SLEEPTHD (MMA9553_DEFAULT_SAMPLE_RATE * 30)
+
+#define MMA9553_CONFIG_RETRIES 2
+
+/* Status register - activity field */
+enum activity_level {
+ ACTIVITY_UNKNOWN,
+ ACTIVITY_REST,
+ ACTIVITY_WALKING,
+ ACTIVITY_JOGGING,
+ ACTIVITY_RUNNING,
+};
+
+static struct mma9553_event_info {
+ enum iio_chan_type type;
+ enum iio_modifier mod;
+ enum iio_event_direction dir;
+} mma9553_events_info[] = {
+ {
+ .type = IIO_STEPS,
+ .mod = IIO_NO_MOD,
+ .dir = IIO_EV_DIR_NONE,
+ },
+ {
+ .type = IIO_ACTIVITY,
+ .mod = IIO_MOD_STILL,
+ .dir = IIO_EV_DIR_RISING,
+ },
+ {
+ .type = IIO_ACTIVITY,
+ .mod = IIO_MOD_STILL,
+ .dir = IIO_EV_DIR_FALLING,
+ },
+ {
+ .type = IIO_ACTIVITY,
+ .mod = IIO_MOD_WALKING,
+ .dir = IIO_EV_DIR_RISING,
+ },
+ {
+ .type = IIO_ACTIVITY,
+ .mod = IIO_MOD_WALKING,
+ .dir = IIO_EV_DIR_FALLING,
+ },
+ {
+ .type = IIO_ACTIVITY,
+ .mod = IIO_MOD_JOGGING,
+ .dir = IIO_EV_DIR_RISING,
+ },
+ {
+ .type = IIO_ACTIVITY,
+ .mod = IIO_MOD_JOGGING,
+ .dir = IIO_EV_DIR_FALLING,
+ },
+ {
+ .type = IIO_ACTIVITY,
+ .mod = IIO_MOD_RUNNING,
+ .dir = IIO_EV_DIR_RISING,
+ },
+ {
+ .type = IIO_ACTIVITY,
+ .mod = IIO_MOD_RUNNING,
+ .dir = IIO_EV_DIR_FALLING,
+ },
+};
+
+#define MMA9553_EVENTS_INFO_SIZE ARRAY_SIZE(mma9553_events_info)
+
+struct mma9553_event {
+ struct mma9553_event_info *info;
+ bool enabled;
+};
+
+struct mma9553_conf_regs {
+ u16 sleepmin;
+ u16 sleepmax;
+ u16 sleepthd;
+ u16 config;
+ u16 height_weight;
+ u16 filter;
+ u16 speed_step;
+ u16 actthd;
+} __packed;
+
+struct mma9553_data {
+ struct i2c_client *client;
+ struct mutex mutex;
+ struct mma9553_conf_regs conf;
+ struct mma9553_event events[MMA9553_EVENTS_INFO_SIZE];
+ int num_events;
+ u8 gpio_bitnum;
+ /*
+ * This is used for all features that depend on step count:
+ * step count, distance, speed, calories.
+ */
+ bool stepcnt_enabled;
+ u16 stepcnt;
+ u8 activity;
+ s64 timestamp;
+};
+
+static u8 mma9553_get_bits(u16 val, u16 mask)
+{
+ return (val & mask) >> (ffs(mask) - 1);
+}
+
+static u16 mma9553_set_bits(u16 current_val, u16 val, u16 mask)
+{
+ return (current_val & ~mask) | (val << (ffs(mask) - 1));
+}
+
+static enum iio_modifier mma9553_activity_to_mod(enum activity_level activity)
+{
+ switch (activity) {
+ case ACTIVITY_RUNNING:
+ return IIO_MOD_RUNNING;
+ case ACTIVITY_JOGGING:
+ return IIO_MOD_JOGGING;
+ case ACTIVITY_WALKING:
+ return IIO_MOD_WALKING;
+ case ACTIVITY_REST:
+ return IIO_MOD_STILL;
+ case ACTIVITY_UNKNOWN:
+ default:
+ return IIO_NO_MOD;
+ }
+}
+
+static void mma9553_init_events(struct mma9553_data *data)
+{
+ int i;
+
+ data->num_events = MMA9553_EVENTS_INFO_SIZE;
+ for (i = 0; i < data->num_events; i++) {
+ data->events[i].info = &mma9553_events_info[i];
+ data->events[i].enabled = false;
+ }
+}
+
+static struct mma9553_event *mma9553_get_event(struct mma9553_data *data,
+ enum iio_chan_type type,
+ enum iio_modifier mod,
+ enum iio_event_direction dir)
+{
+ int i;
+
+ for (i = 0; i < data->num_events; i++)
+ if (data->events[i].info->type == type &&
+ data->events[i].info->mod == mod &&
+ data->events[i].info->dir == dir)
+ return &data->events[i];
+
+ return NULL;
+}
+
+static bool mma9553_is_any_event_enabled(struct mma9553_data *data,
+ bool check_type,
+ enum iio_chan_type type)
+{
+ int i;
+
+ for (i = 0; i < data->num_events; i++)
+ if ((check_type && data->events[i].info->type == type &&
+ data->events[i].enabled) ||
+ (!check_type && data->events[i].enabled))
+ return true;
+
+ return false;
+}
+
+static int mma9553_set_config(struct mma9553_data *data, u16 reg,
+ u16 *p_reg_val, u16 val, u16 mask)
+{
+ int ret, retries;
+ u16 reg_val, config;
+
+ reg_val = *p_reg_val;
+ if (val == mma9553_get_bits(reg_val, mask))
+ return 0;
+
+ reg_val = mma9553_set_bits(reg_val, val, mask);
+ ret = mma9551_write_config_word(data->client, MMA9551_APPID_PEDOMETER,
+ reg, reg_val);
+ if (ret < 0) {
+ dev_err(&data->client->dev,
+ "error writing config register 0x%x\n", reg);
+ return ret;
+ }
+
+ *p_reg_val = reg_val;
+
+ /* Reinitializes the pedometer with current configuration values */
+ config = mma9553_set_bits(data->conf.config, 1,
+ MMA9553_MASK_CONF_CONFIG);
+
+ ret = mma9551_write_config_word(data->client, MMA9551_APPID_PEDOMETER,
+ MMA9553_REG_CONF_CONF_STEPLEN, config);
+ if (ret < 0) {
+ dev_err(&data->client->dev,
+ "error writing config register 0x%x\n",
+ MMA9553_REG_CONF_CONF_STEPLEN);
+ return ret;
+ }
+
+ retries = MMA9553_CONFIG_RETRIES;
+ do {
+ mma9551_sleep(MMA9553_DEFAULT_SAMPLE_RATE);
+ ret = mma9551_read_config_word(data->client,
+ MMA9551_APPID_PEDOMETER,
+ MMA9553_REG_CONF_CONF_STEPLEN,
+ &config);
+ if (ret < 0)
+ return ret;
+ } while (mma9553_get_bits(config, MMA9553_MASK_CONF_CONFIG) &&
+ --retries > 0);
+
+ return 0;
+}
+
+static int mma9553_read_activity_stepcnt(struct mma9553_data *data,
+ u8 *activity, u16 *stepcnt)
+{
+ u16 buf[2];
+ int ret;
+
+ ret = mma9551_read_status_words(data->client, MMA9551_APPID_PEDOMETER,
+ MMA9553_REG_STATUS, sizeof(u32), buf);
+ if (ret < 0) {
+ dev_err(&data->client->dev,
+ "error reading status and stepcnt\n");
+ return ret;
+ }
+
+ *activity = mma9553_get_bits(buf[0], MMA9553_MASK_STATUS_ACTIVITY);
+ *stepcnt = buf[1];
+
+ return 0;
+}
+
+static int mma9553_conf_gpio(struct mma9553_data *data)
+{
+ u8 bitnum = 0, appid = MMA9551_APPID_PEDOMETER;
+ int ret;
+ struct mma9553_event *ev_step_detect;
+ bool activity_enabled;
+
+ activity_enabled =
+ mma9553_is_any_event_enabled(data, true, IIO_ACTIVITY);
+ ev_step_detect =
+ mma9553_get_event(data, IIO_STEPS, IIO_NO_MOD, IIO_EV_DIR_NONE);
+
+ /*
+ * If both step detector and activity are enabled, use the MRGFL bit.
+ * This bit is the logical OR of the SUSPCHG, STEPCHG, and ACTCHG flags.
+ */
+ if (activity_enabled && ev_step_detect->enabled)
+ bitnum = STATUS_TO_BITNUM(MMA9553_MASK_STATUS_MRGFL);
+ else if (ev_step_detect->enabled)
+ bitnum = STATUS_TO_BITNUM(MMA9553_MASK_STATUS_STEPCHG);
+ else if (activity_enabled)
+ bitnum = STATUS_TO_BITNUM(MMA9553_MASK_STATUS_ACTCHG);
+ else /* Reset */
+ appid = MMA9551_APPID_NONE;
+
+ if (data->gpio_bitnum == bitnum)
+ return 0;
+
+ /* Save initial values for activity and stepcnt */
+ if (activity_enabled || ev_step_detect->enabled)
+ mma9553_read_activity_stepcnt(data, &data->activity,
+ &data->stepcnt);
+
+ ret = mma9551_gpio_config(data->client,
+ MMA9553_DEFAULT_GPIO_PIN,
+ appid, bitnum, MMA9553_DEFAULT_GPIO_POLARITY);
+ if (ret < 0)
+ return ret;
+ data->gpio_bitnum = bitnum;
+
+ return 0;
+}
+
+static int mma9553_init(struct mma9553_data *data)
+{
+ int ret;
+
+ ret = mma9551_read_version(data->client);
+ if (ret)
+ return ret;
+
+ /*
+ * Read all the pedometer configuration registers. This is used as
+ * a device identification command to differentiate the MMA9553L
+ * from the MMA9550L.
+ */
+ ret =
+ mma9551_read_config_words(data->client, MMA9551_APPID_PEDOMETER,
+ MMA9553_REG_CONF_SLEEPMIN,
+ sizeof(data->conf), (u16 *) &data->conf);
+ if (ret < 0) {
+ dev_err(&data->client->dev,
+ "device is not MMA9553L: failed to read cfg regs\n");
+ return ret;
+ }
+
+
+ /* Reset gpio */
+ data->gpio_bitnum = -1;
+ ret = mma9553_conf_gpio(data);
+ if (ret < 0)
+ return ret;
+
+ ret = mma9551_app_reset(data->client, MMA9551_RSC_PED);
+ if (ret < 0)
+ return ret;
+
+ /* Init config registers */
+ data->conf.sleepmin = MMA9553_DEFAULT_SLEEPMIN;
+ data->conf.sleepmax = MMA9553_DEFAULT_SLEEPMAX;
+ data->conf.sleepthd = MMA9553_DEFAULT_SLEEPTHD;
+ data->conf.config =
+ mma9553_set_bits(data->conf.config, 1, MMA9553_MASK_CONF_CONFIG);
+ /*
+ * Clear the activity debounce counter when the activity level changes,
+ * so that the confidence level applies for any activity level.
+ */
+ data->conf.config = mma9553_set_bits(data->conf.config, 1,
+ MMA9553_MASK_CONF_ACT_DBCNTM);
+ ret =
+ mma9551_write_config_words(data->client, MMA9551_APPID_PEDOMETER,
+ MMA9553_REG_CONF_SLEEPMIN,
+ sizeof(data->conf), (u16 *) &data->conf);
+ if (ret < 0) {
+ dev_err(&data->client->dev,
+ "failed to write configuration registers\n");
+ return ret;
+ }
+
+ return mma9551_set_device_state(data->client, true);
+}
+
+static int mma9553_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct mma9553_data *data = iio_priv(indio_dev);
+ int ret;
+ u16 tmp;
+ u8 activity;
+ bool powered_on;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_PROCESSED:
+ switch (chan->type) {
+ case IIO_STEPS:
+ /*
+ * The HW only counts steps and other dependent
+ * parameters (speed, distance, calories, activity)
+ * if power is on (from enabling an event or the
+ * step counter */
+ powered_on =
+ mma9553_is_any_event_enabled(data, false, 0) ||
+ data->stepcnt_enabled;
+ if (!powered_on) {
+ dev_err(&data->client->dev,
+ "No channels enabled\n");
+ return -EINVAL;
+ }
+ mutex_lock(&data->mutex);
+ ret = mma9551_read_status_word(data->client,
+ MMA9551_APPID_PEDOMETER,
+ MMA9553_REG_STEPCNT,
+ &tmp);
+ mutex_unlock(&data->mutex);
+ if (ret < 0)
+ return ret;
+ *val = tmp;
+ return IIO_VAL_INT;
+ case IIO_DISTANCE:
+ powered_on =
+ mma9553_is_any_event_enabled(data, false, 0) ||
+ data->stepcnt_enabled;
+ if (!powered_on) {
+ dev_err(&data->client->dev,
+ "No channels enabled\n");
+ return -EINVAL;
+ }
+ mutex_lock(&data->mutex);
+ ret = mma9551_read_status_word(data->client,
+ MMA9551_APPID_PEDOMETER,
+ MMA9553_REG_DISTANCE,
+ &tmp);
+ mutex_unlock(&data->mutex);
+ if (ret < 0)
+ return ret;
+ *val = tmp;
+ return IIO_VAL_INT;
+ case IIO_ACTIVITY:
+ powered_on =
+ mma9553_is_any_event_enabled(data, false, 0) ||
+ data->stepcnt_enabled;
+ if (!powered_on) {
+ dev_err(&data->client->dev,
+ "No channels enabled\n");
+ return -EINVAL;
+ }
+ mutex_lock(&data->mutex);
+ ret = mma9551_read_status_word(data->client,
+ MMA9551_APPID_PEDOMETER,
+ MMA9553_REG_STATUS,
+ &tmp);
+ mutex_unlock(&data->mutex);
+ if (ret < 0)
+ return ret;
+
+ activity =
+ mma9553_get_bits(tmp, MMA9553_MASK_STATUS_ACTIVITY);
+
+ /*
+ * The device does not support confidence value levels,
+ * so we will always have 100% for current activity and
+ * 0% for the others.
+ */
+ if (chan->channel2 == mma9553_activity_to_mod(activity))
+ *val = 100;
+ else
+ *val = 0;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_RAW:
+ switch (chan->type) {
+ case IIO_VELOCITY: /* m/h */
+ if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
+ return -EINVAL;
+ powered_on =
+ mma9553_is_any_event_enabled(data, false, 0) ||
+ data->stepcnt_enabled;
+ if (!powered_on) {
+ dev_err(&data->client->dev,
+ "No channels enabled\n");
+ return -EINVAL;
+ }
+ mutex_lock(&data->mutex);
+ ret = mma9551_read_status_word(data->client,
+ MMA9551_APPID_PEDOMETER,
+ MMA9553_REG_SPEED, &tmp);
+ mutex_unlock(&data->mutex);
+ if (ret < 0)
+ return ret;
+ *val = tmp;
+ return IIO_VAL_INT;
+ case IIO_ENERGY: /* Cal or kcal */
+ powered_on =
+ mma9553_is_any_event_enabled(data, false, 0) ||
+ data->stepcnt_enabled;
+ if (!powered_on) {
+ dev_err(&data->client->dev,
+ "No channels enabled\n");
+ return -EINVAL;
+ }
+ mutex_lock(&data->mutex);
+ ret = mma9551_read_status_word(data->client,
+ MMA9551_APPID_PEDOMETER,
+ MMA9553_REG_CALORIES,
+ &tmp);
+ mutex_unlock(&data->mutex);
+ if (ret < 0)
+ return ret;
+ *val = tmp;
+ return IIO_VAL_INT;
+ case IIO_ACCEL:
+ mutex_lock(&data->mutex);
+ ret = mma9551_read_accel_chan(data->client,
+ chan, val, val2);
+ mutex_unlock(&data->mutex);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_VELOCITY: /* m/h to m/s */
+ if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
+ return -EINVAL;
+ *val = 0;
+ *val2 = 277; /* 0.000277 */
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_ENERGY: /* Cal or kcal to J */
+ *val = 4184;
+ return IIO_VAL_INT;
+ case IIO_ACCEL:
+ return mma9551_read_accel_scale(val, val2);
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_ENABLE:
+ *val = data->stepcnt_enabled;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_CALIBHEIGHT:
+ tmp = mma9553_get_bits(data->conf.height_weight,
+ MMA9553_MASK_CONF_HEIGHT);
+ *val = tmp / 100; /* cm to m */
+ *val2 = (tmp % 100) * 10000;
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_CHAN_INFO_CALIBWEIGHT:
+ *val = mma9553_get_bits(data->conf.height_weight,
+ MMA9553_MASK_CONF_WEIGHT);
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_DEBOUNCE_COUNT:
+ switch (chan->type) {
+ case IIO_STEPS:
+ *val = mma9553_get_bits(data->conf.filter,
+ MMA9553_MASK_CONF_FILTSTEP);
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_DEBOUNCE_TIME:
+ switch (chan->type) {
+ case IIO_STEPS:
+ *val = mma9553_get_bits(data->conf.filter,
+ MMA9553_MASK_CONF_FILTTIME);
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_INT_TIME:
+ switch (chan->type) {
+ case IIO_VELOCITY:
+ if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
+ return -EINVAL;
+ *val = mma9553_get_bits(data->conf.speed_step,
+ MMA9553_MASK_CONF_SPDPRD);
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+static int mma9553_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct mma9553_data *data = iio_priv(indio_dev);
+ int ret, tmp;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_ENABLE:
+ if (data->stepcnt_enabled == !!val)
+ return 0;
+ mutex_lock(&data->mutex);
+ ret = mma9551_set_power_state(data->client, val);
+ if (ret < 0) {
+ mutex_unlock(&data->mutex);
+ return ret;
+ }
+ data->stepcnt_enabled = val;
+ mutex_unlock(&data->mutex);
+ return 0;
+ case IIO_CHAN_INFO_CALIBHEIGHT:
+ /* m to cm */
+ tmp = val * 100 + val2 / 10000;
+ if (tmp < 0 || tmp > 255)
+ return -EINVAL;
+ mutex_lock(&data->mutex);
+ ret = mma9553_set_config(data,
+ MMA9553_REG_CONF_HEIGHT_WEIGHT,
+ &data->conf.height_weight,
+ tmp, MMA9553_MASK_CONF_HEIGHT);
+ mutex_unlock(&data->mutex);
+ return ret;
+ case IIO_CHAN_INFO_CALIBWEIGHT:
+ if (val < 0 || val > 255)
+ return -EINVAL;
+ mutex_lock(&data->mutex);
+ ret = mma9553_set_config(data,
+ MMA9553_REG_CONF_HEIGHT_WEIGHT,
+ &data->conf.height_weight,
+ val, MMA9553_MASK_CONF_WEIGHT);
+ mutex_unlock(&data->mutex);
+ return ret;
+ case IIO_CHAN_INFO_DEBOUNCE_COUNT:
+ switch (chan->type) {
+ case IIO_STEPS:
+ /*
+ * Set to 0 to disable step filtering. If the value
+ * specified is greater than 6, then 6 will be used.
+ */
+ if (val < 0)
+ return -EINVAL;
+ if (val > 6)
+ val = 6;
+ mutex_lock(&data->mutex);
+ ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER,
+ &data->conf.filter, val,
+ MMA9553_MASK_CONF_FILTSTEP);
+ mutex_unlock(&data->mutex);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_DEBOUNCE_TIME:
+ switch (chan->type) {
+ case IIO_STEPS:
+ if (val < 0 || val > 127)
+ return -EINVAL;
+ mutex_lock(&data->mutex);
+ ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER,
+ &data->conf.filter, val,
+ MMA9553_MASK_CONF_FILTTIME);
+ mutex_unlock(&data->mutex);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_INT_TIME:
+ switch (chan->type) {
+ case IIO_VELOCITY:
+ if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
+ return -EINVAL;
+ /*
+ * If set to a value greater than 5, then 5 will be
+ * used. Warning: Do not set SPDPRD to 0 or 1 as
+ * this may cause undesirable behavior.
+ */
+ if (val < 2)
+ return -EINVAL;
+ if (val > 5)
+ val = 5;
+ mutex_lock(&data->mutex);
+ ret = mma9553_set_config(data,
+ MMA9553_REG_CONF_SPEED_STEP,
+ &data->conf.speed_step, val,
+ MMA9553_MASK_CONF_SPDPRD);
+ mutex_unlock(&data->mutex);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+static int mma9553_read_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir)
+{
+
+ struct mma9553_data *data = iio_priv(indio_dev);
+ struct mma9553_event *event;
+
+ event = mma9553_get_event(data, chan->type, chan->channel2, dir);
+ if (!event)
+ return -EINVAL;
+
+ return event->enabled;
+}
+
+static int mma9553_write_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir, int state)
+{
+ struct mma9553_data *data = iio_priv(indio_dev);
+ struct mma9553_event *event;
+ int ret;
+
+ event = mma9553_get_event(data, chan->type, chan->channel2, dir);
+ if (!event)
+ return -EINVAL;
+
+ if (event->enabled == state)
+ return 0;
+
+ mutex_lock(&data->mutex);
+
+ ret = mma9551_set_power_state(data->client, state);
+ if (ret < 0)
+ goto err_out;
+ event->enabled = state;
+
+ ret = mma9553_conf_gpio(data);
+ if (ret < 0)
+ goto err_conf_gpio;
+
+ mutex_unlock(&data->mutex);
+
+ return ret;
+
+err_conf_gpio:
+ if (state) {
+ event->enabled = false;
+ mma9551_set_power_state(data->client, false);
+ }
+err_out:
+ mutex_unlock(&data->mutex);
+ return ret;
+}
+
+static int mma9553_read_event_value(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int *val, int *val2)
+{
+ struct mma9553_data *data = iio_priv(indio_dev);
+
+ *val2 = 0;
+ switch (info) {
+ case IIO_EV_INFO_VALUE:
+ switch (chan->type) {
+ case IIO_STEPS:
+ *val = mma9553_get_bits(data->conf.speed_step,
+ MMA9553_MASK_CONF_STEPCOALESCE);
+ return IIO_VAL_INT;
+ case IIO_ACTIVITY:
+ /*
+ * The device does not support confidence value levels.
+ * We set an average of 50%.
+ */
+ *val = 50;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_EV_INFO_PERIOD:
+ switch (chan->type) {
+ case IIO_ACTIVITY:
+ *val = MMA9553_ACTIVITY_THD_TO_SEC(data->conf.actthd);
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+static int mma9553_write_event_value(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int val, int val2)
+{
+ struct mma9553_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (info) {
+ case IIO_EV_INFO_VALUE:
+ switch (chan->type) {
+ case IIO_STEPS:
+ if (val < 0 || val > 255)
+ return -EINVAL;
+ mutex_lock(&data->mutex);
+ ret = mma9553_set_config(data,
+ MMA9553_REG_CONF_SPEED_STEP,
+ &data->conf.speed_step, val,
+ MMA9553_MASK_CONF_STEPCOALESCE);
+ mutex_unlock(&data->mutex);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+ case IIO_EV_INFO_PERIOD:
+ switch (chan->type) {
+ case IIO_ACTIVITY:
+ if (val < 0 || val > MMA9553_ACTIVITY_THD_TO_SEC(
+ MMA9553_MAX_ACTTHD))
+ return -EINVAL;
+ mutex_lock(&data->mutex);
+ ret = mma9553_set_config(data, MMA9553_REG_CONF_ACTTHD,
+ &data->conf.actthd,
+ MMA9553_ACTIVITY_SEC_TO_THD
+ (val), MMA9553_MASK_CONF_WORD);
+ mutex_unlock(&data->mutex);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+static int mma9553_get_calibgender_mode(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan)
+{
+ struct mma9553_data *data = iio_priv(indio_dev);
+ u8 gender;
+
+ gender = mma9553_get_bits(data->conf.filter, MMA9553_MASK_CONF_MALE);
+ /*
+ * HW expects 0 for female and 1 for male,
+ * while iio index is 0 for male and 1 for female
+ */
+ return !gender;
+}
+
+static int mma9553_set_calibgender_mode(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ unsigned int mode)
+{
+ struct mma9553_data *data = iio_priv(indio_dev);
+ u8 gender = !mode;
+ int ret;
+
+ if ((mode != 0) && (mode != 1))
+ return -EINVAL;
+ mutex_lock(&data->mutex);
+ ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER,
+ &data->conf.filter, gender,
+ MMA9553_MASK_CONF_MALE);
+ mutex_unlock(&data->mutex);
+
+ return ret;
+}
+
+static const struct iio_event_spec mma9553_step_event = {
+ .type = IIO_EV_TYPE_CHANGE,
+ .dir = IIO_EV_DIR_NONE,
+ .mask_separate = BIT(IIO_EV_INFO_ENABLE) | BIT(IIO_EV_INFO_VALUE),
+};
+
+static const struct iio_event_spec mma9553_activity_events[] = {
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_RISING,
+ .mask_separate = BIT(IIO_EV_INFO_ENABLE) |
+ BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_PERIOD),
+ },
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_FALLING,
+ .mask_separate = BIT(IIO_EV_INFO_ENABLE) |
+ BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_PERIOD),
+ },
+};
+
+static const char * const calibgender_modes[] = { "male", "female" };
+
+static const struct iio_enum mma9553_calibgender_enum = {
+ .items = calibgender_modes,
+ .num_items = ARRAY_SIZE(calibgender_modes),
+ .get = mma9553_get_calibgender_mode,
+ .set = mma9553_set_calibgender_mode,
+};
+
+static const struct iio_chan_spec_ext_info mma9553_ext_info[] = {
+ IIO_ENUM("calibgender", IIO_SHARED_BY_TYPE, &mma9553_calibgender_enum),
+ IIO_ENUM_AVAILABLE("calibgender", &mma9553_calibgender_enum),
+ {},
+};
+
+#define MMA9553_PEDOMETER_CHANNEL(_type, _mask) { \
+ .type = _type, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_ENABLE) | \
+ BIT(IIO_CHAN_INFO_CALIBHEIGHT) | \
+ _mask, \
+ .ext_info = mma9553_ext_info, \
+}
+
+#define MMA9553_ACTIVITY_CHANNEL(_chan2) { \
+ .type = IIO_ACTIVITY, \
+ .modified = 1, \
+ .channel2 = _chan2, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBHEIGHT) | \
+ BIT(IIO_CHAN_INFO_ENABLE), \
+ .event_spec = mma9553_activity_events, \
+ .num_event_specs = ARRAY_SIZE(mma9553_activity_events), \
+ .ext_info = mma9553_ext_info, \
+}
+
+static const struct iio_chan_spec mma9553_channels[] = {
+ MMA9551_ACCEL_CHANNEL(IIO_MOD_X),
+ MMA9551_ACCEL_CHANNEL(IIO_MOD_Y),
+ MMA9551_ACCEL_CHANNEL(IIO_MOD_Z),
+
+ {
+ .type = IIO_STEPS,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
+ BIT(IIO_CHAN_INFO_ENABLE) |
+ BIT(IIO_CHAN_INFO_DEBOUNCE_COUNT) |
+ BIT(IIO_CHAN_INFO_DEBOUNCE_TIME),
+ .event_spec = &mma9553_step_event,
+ .num_event_specs = 1,
+ },
+
+ MMA9553_PEDOMETER_CHANNEL(IIO_DISTANCE, BIT(IIO_CHAN_INFO_PROCESSED)),
+ {
+ .type = IIO_VELOCITY,
+ .modified = 1,
+ .channel2 = IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_INT_TIME) |
+ BIT(IIO_CHAN_INFO_ENABLE),
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBHEIGHT),
+ .ext_info = mma9553_ext_info,
+ },
+ MMA9553_PEDOMETER_CHANNEL(IIO_ENERGY, BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_CALIBWEIGHT)),
+
+ MMA9553_ACTIVITY_CHANNEL(IIO_MOD_RUNNING),
+ MMA9553_ACTIVITY_CHANNEL(IIO_MOD_JOGGING),
+ MMA9553_ACTIVITY_CHANNEL(IIO_MOD_WALKING),
+ MMA9553_ACTIVITY_CHANNEL(IIO_MOD_STILL),
+};
+
+static const struct iio_info mma9553_info = {
+ .driver_module = THIS_MODULE,
+ .read_raw = mma9553_read_raw,
+ .write_raw = mma9553_write_raw,
+ .read_event_config = mma9553_read_event_config,
+ .write_event_config = mma9553_write_event_config,
+ .read_event_value = mma9553_read_event_value,
+ .write_event_value = mma9553_write_event_value,
+};
+
+static irqreturn_t mma9553_irq_handler(int irq, void *private)
+{
+ struct iio_dev *indio_dev = private;
+ struct mma9553_data *data = iio_priv(indio_dev);
+
+ data->timestamp = iio_get_time_ns();
+ /*
+ * Since we only configure the interrupt pin when an
+ * event is enabled, we are sure we have at least
+ * one event enabled at this point.
+ */
+ return IRQ_WAKE_THREAD;
+}
+
+static irqreturn_t mma9553_event_handler(int irq, void *private)
+{
+ struct iio_dev *indio_dev = private;
+ struct mma9553_data *data = iio_priv(indio_dev);
+ u16 stepcnt;
+ u8 activity;
+ struct mma9553_event *ev_activity, *ev_prev_activity, *ev_step_detect;
+ int ret;
+
+ mutex_lock(&data->mutex);
+ ret = mma9553_read_activity_stepcnt(data, &activity, &stepcnt);
+ if (ret < 0) {
+ mutex_unlock(&data->mutex);
+ return IRQ_HANDLED;
+ }
+
+ ev_prev_activity =
+ mma9553_get_event(data, IIO_ACTIVITY,
+ mma9553_activity_to_mod(data->activity),
+ IIO_EV_DIR_FALLING);
+ ev_activity =
+ mma9553_get_event(data, IIO_ACTIVITY,
+ mma9553_activity_to_mod(activity),
+ IIO_EV_DIR_RISING);
+ ev_step_detect =
+ mma9553_get_event(data, IIO_STEPS, IIO_NO_MOD, IIO_EV_DIR_NONE);
+
+ if (ev_step_detect->enabled && (stepcnt != data->stepcnt)) {
+ data->stepcnt = stepcnt;
+ iio_push_event(indio_dev,
+ IIO_EVENT_CODE(IIO_STEPS, 0, IIO_NO_MOD,
+ IIO_EV_DIR_NONE, IIO_EV_TYPE_CHANGE, 0, 0, 0),
+ data->timestamp);
+ }
+
+ if (activity != data->activity) {
+ data->activity = activity;
+ /* ev_activity can be NULL if activity == ACTIVITY_UNKNOWN */
+ if (ev_prev_activity && ev_prev_activity->enabled)
+ iio_push_event(indio_dev,
+ IIO_EVENT_CODE(IIO_ACTIVITY, 0,
+ ev_prev_activity->info->mod,
+ IIO_EV_DIR_FALLING,
+ IIO_EV_TYPE_THRESH, 0, 0, 0),
+ data->timestamp);
+
+ if (ev_activity && ev_activity->enabled)
+ iio_push_event(indio_dev,
+ IIO_EVENT_CODE(IIO_ACTIVITY, 0,
+ ev_activity->info->mod,
+ IIO_EV_DIR_RISING,
+ IIO_EV_TYPE_THRESH, 0, 0, 0),
+ data->timestamp);
+ }
+ mutex_unlock(&data->mutex);
+
+ return IRQ_HANDLED;
+}
+
+static int mma9553_gpio_probe(struct i2c_client *client)
+{
+ struct device *dev;
+ struct gpio_desc *gpio;
+ int ret;
+
+ if (!client)
+ return -EINVAL;
+
+ dev = &client->dev;
+
+ /* data ready gpio interrupt pin */
+ gpio = devm_gpiod_get_index(dev, MMA9553_GPIO_NAME, 0, GPIOD_IN);
+ if (IS_ERR(gpio)) {
+ dev_err(dev, "acpi gpio get index failed\n");
+ return PTR_ERR(gpio);
+ }
+
+ ret = gpiod_to_irq(gpio);
+
+ dev_dbg(dev, "gpio resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret);
+
+ return ret;
+}
+
+static const char *mma9553_match_acpi_device(struct device *dev)
+{
+ const struct acpi_device_id *id;
+
+ id = acpi_match_device(dev->driver->acpi_match_table, dev);
+ if (!id)
+ return NULL;
+
+ return dev_name(dev);
+}
+
+static int mma9553_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct mma9553_data *data;
+ struct iio_dev *indio_dev;
+ const char *name = NULL;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+
+ if (id)
+ name = id->name;
+ else if (ACPI_HANDLE(&client->dev))
+ name = mma9553_match_acpi_device(&client->dev);
+ else
+ return -ENOSYS;
+
+ mutex_init(&data->mutex);
+ mma9553_init_events(data);
+
+ ret = mma9553_init(data);
+ if (ret < 0)
+ return ret;
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->channels = mma9553_channels;
+ indio_dev->num_channels = ARRAY_SIZE(mma9553_channels);
+ indio_dev->name = name;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->info = &mma9553_info;
+
+ if (client->irq < 0)
+ client->irq = mma9553_gpio_probe(client);
+
+ if (client->irq >= 0) {
+ ret = devm_request_threaded_irq(&client->dev, client->irq,
+ mma9553_irq_handler,
+ mma9553_event_handler,
+ IRQF_TRIGGER_RISING,
+ MMA9553_IRQ_NAME, indio_dev);
+ if (ret < 0) {
+ dev_err(&client->dev, "request irq %d failed\n",
+ client->irq);
+ goto out_poweroff;
+ }
+
+ }
+
+ ret = iio_device_register(indio_dev);
+ if (ret < 0) {
+ dev_err(&client->dev, "unable to register iio device\n");
+ goto out_poweroff;
+ }
+
+ ret = pm_runtime_set_active(&client->dev);
+ if (ret < 0)
+ goto out_iio_unregister;
+
+ pm_runtime_enable(&client->dev);
+ pm_runtime_set_autosuspend_delay(&client->dev,
+ MMA9551_AUTO_SUSPEND_DELAY_MS);
+ pm_runtime_use_autosuspend(&client->dev);
+
+ dev_dbg(&indio_dev->dev, "Registered device %s\n", name);
+
+ return 0;
+
+out_iio_unregister:
+ iio_device_unregister(indio_dev);
+out_poweroff:
+ mma9551_set_device_state(client, false);
+ return ret;
+}
+
+static int mma9553_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct mma9553_data *data = iio_priv(indio_dev);
+
+ pm_runtime_disable(&client->dev);
+ pm_runtime_set_suspended(&client->dev);
+ pm_runtime_put_noidle(&client->dev);
+
+ iio_device_unregister(indio_dev);
+ mutex_lock(&data->mutex);
+ mma9551_set_device_state(data->client, false);
+ mutex_unlock(&data->mutex);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int mma9553_runtime_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct mma9553_data *data = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&data->mutex);
+ ret = mma9551_set_device_state(data->client, false);
+ mutex_unlock(&data->mutex);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "powering off device failed\n");
+ return -EAGAIN;
+ }
+
+ return 0;
+}
+
+static int mma9553_runtime_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct mma9553_data *data = iio_priv(indio_dev);
+ int ret;
+
+ ret = mma9551_set_device_state(data->client, true);
+ if (ret < 0)
+ return ret;
+
+ mma9551_sleep(MMA9553_DEFAULT_SAMPLE_RATE);
+
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_PM_SLEEP
+static int mma9553_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct mma9553_data *data = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&data->mutex);
+ ret = mma9551_set_device_state(data->client, false);
+ mutex_unlock(&data->mutex);
+
+ return ret;
+}
+
+static int mma9553_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct mma9553_data *data = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&data->mutex);
+ ret = mma9551_set_device_state(data->client, true);
+ mutex_unlock(&data->mutex);
+
+ return ret;
+}
+#endif
+
+static const struct dev_pm_ops mma9553_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(mma9553_suspend, mma9553_resume)
+ SET_RUNTIME_PM_OPS(mma9553_runtime_suspend,
+ mma9553_runtime_resume, NULL)
+};
+
+static const struct acpi_device_id mma9553_acpi_match[] = {
+ {"MMA9553", 0},
+ {},
+};
+
+MODULE_DEVICE_TABLE(acpi, mma9553_acpi_match);
+
+static const struct i2c_device_id mma9553_id[] = {
+ {"mma9553", 0},
+ {},
+};
+
+MODULE_DEVICE_TABLE(i2c, mma9553_id);
+
+static struct i2c_driver mma9553_driver = {
+ .driver = {
+ .name = MMA9553_DRV_NAME,
+ .acpi_match_table = ACPI_PTR(mma9553_acpi_match),
+ .pm = &mma9553_pm_ops,
+ },
+ .probe = mma9553_probe,
+ .remove = mma9553_remove,
+ .id_table = mma9553_id,
+};
+
+module_i2c_driver(mma9553_driver);
+
+MODULE_AUTHOR("Irina Tirdea <irina.tirdea@intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("MMA9553L pedometer platform driver");
diff --git a/drivers/iio/accel/ssp_accel_sensor.c b/drivers/iio/accel/ssp_accel_sensor.c
new file mode 100644
index 000000000..4ae05fce9
--- /dev/null
+++ b/drivers/iio/accel/ssp_accel_sensor.c
@@ -0,0 +1,169 @@
+/*
+ * Copyright (C) 2014, Samsung Electronics Co. Ltd. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/iio/common/ssp_sensors.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/kfifo_buf.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include "../common/ssp_sensors/ssp_iio_sensor.h"
+
+#define SSP_CHANNEL_COUNT 3
+
+#define SSP_ACCEL_NAME "ssp-accelerometer"
+static const char ssp_accel_device_name[] = SSP_ACCEL_NAME;
+
+enum ssp_accel_3d_channel {
+ SSP_CHANNEL_SCAN_INDEX_X,
+ SSP_CHANNEL_SCAN_INDEX_Y,
+ SSP_CHANNEL_SCAN_INDEX_Z,
+ SSP_CHANNEL_SCAN_INDEX_TIME,
+};
+
+static int ssp_accel_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int *val,
+ int *val2, long mask)
+{
+ u32 t;
+ struct ssp_data *data = dev_get_drvdata(indio_dev->dev.parent->parent);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ t = ssp_get_sensor_delay(data, SSP_ACCELEROMETER_SENSOR);
+ ssp_convert_to_freq(t, val, val2);
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ break;
+ }
+
+ return -EINVAL;
+}
+
+static int ssp_accel_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int val,
+ int val2, long mask)
+{
+ int ret;
+ struct ssp_data *data = dev_get_drvdata(indio_dev->dev.parent->parent);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ ret = ssp_convert_to_time(val, val2);
+ ret = ssp_change_delay(data, SSP_ACCELEROMETER_SENSOR, ret);
+ if (ret < 0)
+ dev_err(&indio_dev->dev, "accel sensor enable fail\n");
+
+ return ret;
+ default:
+ break;
+ }
+
+ return -EINVAL;
+}
+
+static struct iio_info ssp_accel_iio_info = {
+ .read_raw = &ssp_accel_read_raw,
+ .write_raw = &ssp_accel_write_raw,
+};
+
+static const unsigned long ssp_accel_scan_mask[] = { 0x7, 0, };
+
+static const struct iio_chan_spec ssp_acc_channels[] = {
+ SSP_CHANNEL_AG(IIO_ACCEL, IIO_MOD_X, SSP_CHANNEL_SCAN_INDEX_X),
+ SSP_CHANNEL_AG(IIO_ACCEL, IIO_MOD_Y, SSP_CHANNEL_SCAN_INDEX_Y),
+ SSP_CHANNEL_AG(IIO_ACCEL, IIO_MOD_Z, SSP_CHANNEL_SCAN_INDEX_Z),
+ SSP_CHAN_TIMESTAMP(SSP_CHANNEL_SCAN_INDEX_TIME),
+};
+
+static int ssp_process_accel_data(struct iio_dev *indio_dev, void *buf,
+ int64_t timestamp)
+{
+ return ssp_common_process_data(indio_dev, buf, SSP_ACCELEROMETER_SIZE,
+ timestamp);
+}
+
+static const struct iio_buffer_setup_ops ssp_accel_buffer_ops = {
+ .postenable = &ssp_common_buffer_postenable,
+ .postdisable = &ssp_common_buffer_postdisable,
+};
+
+static int ssp_accel_probe(struct platform_device *pdev)
+{
+ int ret;
+ struct iio_dev *indio_dev;
+ struct ssp_sensor_data *spd;
+ struct iio_buffer *buffer;
+
+ indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*spd));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ spd = iio_priv(indio_dev);
+
+ spd->process_data = ssp_process_accel_data;
+ spd->type = SSP_ACCELEROMETER_SENSOR;
+
+ indio_dev->name = ssp_accel_device_name;
+ indio_dev->dev.parent = &pdev->dev;
+ indio_dev->dev.of_node = pdev->dev.of_node;
+ indio_dev->info = &ssp_accel_iio_info;
+ indio_dev->modes = INDIO_BUFFER_SOFTWARE;
+ indio_dev->channels = ssp_acc_channels;
+ indio_dev->num_channels = ARRAY_SIZE(ssp_acc_channels);
+ indio_dev->available_scan_masks = ssp_accel_scan_mask;
+
+ buffer = devm_iio_kfifo_allocate(&pdev->dev);
+ if (!buffer)
+ return -ENOMEM;
+
+ iio_device_attach_buffer(indio_dev, buffer);
+
+ indio_dev->setup_ops = &ssp_accel_buffer_ops;
+
+ platform_set_drvdata(pdev, indio_dev);
+
+ ret = iio_device_register(indio_dev);
+ if (ret < 0)
+ return ret;
+
+ /* ssp registering should be done after all iio setup */
+ ssp_register_consumer(indio_dev, SSP_ACCELEROMETER_SENSOR);
+
+ return 0;
+}
+
+static int ssp_accel_remove(struct platform_device *pdev)
+{
+ struct iio_dev *indio_dev = platform_get_drvdata(pdev);
+
+ iio_device_unregister(indio_dev);
+
+ return 0;
+}
+
+static struct platform_driver ssp_accel_driver = {
+ .driver = {
+ .name = SSP_ACCEL_NAME,
+ },
+ .probe = ssp_accel_probe,
+ .remove = ssp_accel_remove,
+};
+
+module_platform_driver(ssp_accel_driver);
+
+MODULE_AUTHOR("Karol Wrona <k.wrona@samsung.com>");
+MODULE_DESCRIPTION("Samsung sensorhub accelerometers driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/accel/st_accel.h b/drivers/iio/accel/st_accel.h
new file mode 100644
index 000000000..7ee9724b1
--- /dev/null
+++ b/drivers/iio/accel/st_accel.h
@@ -0,0 +1,56 @@
+/*
+ * STMicroelectronics accelerometers driver
+ *
+ * Copyright 2012-2013 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@st.com>
+ * v. 1.0.0
+ * Licensed under the GPL-2.
+ */
+
+#ifndef ST_ACCEL_H
+#define ST_ACCEL_H
+
+#include <linux/types.h>
+#include <linux/iio/common/st_sensors.h>
+
+#define LIS3LV02DL_ACCEL_DEV_NAME "lis3lv02dl_accel"
+#define LSM303DLHC_ACCEL_DEV_NAME "lsm303dlhc_accel"
+#define LIS3DH_ACCEL_DEV_NAME "lis3dh"
+#define LSM330D_ACCEL_DEV_NAME "lsm330d_accel"
+#define LSM330DL_ACCEL_DEV_NAME "lsm330dl_accel"
+#define LSM330DLC_ACCEL_DEV_NAME "lsm330dlc_accel"
+#define LIS331DLH_ACCEL_DEV_NAME "lis331dlh"
+#define LSM303DL_ACCEL_DEV_NAME "lsm303dl_accel"
+#define LSM303DLH_ACCEL_DEV_NAME "lsm303dlh_accel"
+#define LSM303DLM_ACCEL_DEV_NAME "lsm303dlm_accel"
+#define LSM330_ACCEL_DEV_NAME "lsm330_accel"
+
+/**
+* struct st_sensors_platform_data - default accel platform data
+* @drdy_int_pin: default accel DRDY is available on INT1 pin.
+*/
+static const struct st_sensors_platform_data default_accel_pdata = {
+ .drdy_int_pin = 1,
+};
+
+int st_accel_common_probe(struct iio_dev *indio_dev);
+void st_accel_common_remove(struct iio_dev *indio_dev);
+
+#ifdef CONFIG_IIO_BUFFER
+int st_accel_allocate_ring(struct iio_dev *indio_dev);
+void st_accel_deallocate_ring(struct iio_dev *indio_dev);
+int st_accel_trig_set_state(struct iio_trigger *trig, bool state);
+#define ST_ACCEL_TRIGGER_SET_STATE (&st_accel_trig_set_state)
+#else /* CONFIG_IIO_BUFFER */
+static inline int st_accel_allocate_ring(struct iio_dev *indio_dev)
+{
+ return 0;
+}
+static inline void st_accel_deallocate_ring(struct iio_dev *indio_dev)
+{
+}
+#define ST_ACCEL_TRIGGER_SET_STATE NULL
+#endif /* CONFIG_IIO_BUFFER */
+
+#endif /* ST_ACCEL_H */
diff --git a/drivers/iio/accel/st_accel_buffer.c b/drivers/iio/accel/st_accel_buffer.c
new file mode 100644
index 000000000..a1e642ee1
--- /dev/null
+++ b/drivers/iio/accel/st_accel_buffer.c
@@ -0,0 +1,105 @@
+/*
+ * STMicroelectronics accelerometers driver
+ *
+ * Copyright 2012-2013 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@st.com>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/stat.h>
+#include <linux/interrupt.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+
+#include <linux/iio/common/st_sensors.h>
+#include "st_accel.h"
+
+int st_accel_trig_set_state(struct iio_trigger *trig, bool state)
+{
+ struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+
+ return st_sensors_set_dataready_irq(indio_dev, state);
+}
+
+static int st_accel_buffer_preenable(struct iio_dev *indio_dev)
+{
+ return st_sensors_set_enable(indio_dev, true);
+}
+
+static int st_accel_buffer_postenable(struct iio_dev *indio_dev)
+{
+ int err;
+ struct st_sensor_data *adata = iio_priv(indio_dev);
+
+ adata->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
+ if (adata->buffer_data == NULL) {
+ err = -ENOMEM;
+ goto allocate_memory_error;
+ }
+
+ err = st_sensors_set_axis_enable(indio_dev,
+ (u8)indio_dev->active_scan_mask[0]);
+ if (err < 0)
+ goto st_accel_buffer_postenable_error;
+
+ err = iio_triggered_buffer_postenable(indio_dev);
+ if (err < 0)
+ goto st_accel_buffer_postenable_error;
+
+ return err;
+
+st_accel_buffer_postenable_error:
+ kfree(adata->buffer_data);
+allocate_memory_error:
+ return err;
+}
+
+static int st_accel_buffer_predisable(struct iio_dev *indio_dev)
+{
+ int err;
+ struct st_sensor_data *adata = iio_priv(indio_dev);
+
+ err = iio_triggered_buffer_predisable(indio_dev);
+ if (err < 0)
+ goto st_accel_buffer_predisable_error;
+
+ err = st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS);
+ if (err < 0)
+ goto st_accel_buffer_predisable_error;
+
+ err = st_sensors_set_enable(indio_dev, false);
+
+st_accel_buffer_predisable_error:
+ kfree(adata->buffer_data);
+ return err;
+}
+
+static const struct iio_buffer_setup_ops st_accel_buffer_setup_ops = {
+ .preenable = &st_accel_buffer_preenable,
+ .postenable = &st_accel_buffer_postenable,
+ .predisable = &st_accel_buffer_predisable,
+};
+
+int st_accel_allocate_ring(struct iio_dev *indio_dev)
+{
+ return iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
+ &st_sensors_trigger_handler, &st_accel_buffer_setup_ops);
+}
+
+void st_accel_deallocate_ring(struct iio_dev *indio_dev)
+{
+ iio_triggered_buffer_cleanup(indio_dev);
+}
+
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics accelerometers buffer");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/st_accel_core.c b/drivers/iio/accel/st_accel_core.c
new file mode 100644
index 000000000..211b13271
--- /dev/null
+++ b/drivers/iio/accel/st_accel_core.c
@@ -0,0 +1,622 @@
+/*
+ * STMicroelectronics accelerometers driver
+ *
+ * Copyright 2012-2013 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@st.com>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/mutex.h>
+#include <linux/interrupt.h>
+#include <linux/i2c.h>
+#include <linux/gpio.h>
+#include <linux/irq.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/buffer.h>
+
+#include <linux/iio/common/st_sensors.h>
+#include "st_accel.h"
+
+#define ST_ACCEL_NUMBER_DATA_CHANNELS 3
+
+/* DEFAULT VALUE FOR SENSORS */
+#define ST_ACCEL_DEFAULT_OUT_X_L_ADDR 0x28
+#define ST_ACCEL_DEFAULT_OUT_Y_L_ADDR 0x2a
+#define ST_ACCEL_DEFAULT_OUT_Z_L_ADDR 0x2c
+
+/* FULLSCALE */
+#define ST_ACCEL_FS_AVL_2G 2
+#define ST_ACCEL_FS_AVL_4G 4
+#define ST_ACCEL_FS_AVL_6G 6
+#define ST_ACCEL_FS_AVL_8G 8
+#define ST_ACCEL_FS_AVL_16G 16
+
+/* CUSTOM VALUES FOR SENSOR 1 */
+#define ST_ACCEL_1_WAI_EXP 0x33
+#define ST_ACCEL_1_ODR_ADDR 0x20
+#define ST_ACCEL_1_ODR_MASK 0xf0
+#define ST_ACCEL_1_ODR_AVL_1HZ_VAL 0x01
+#define ST_ACCEL_1_ODR_AVL_10HZ_VAL 0x02
+#define ST_ACCEL_1_ODR_AVL_25HZ_VAL 0x03
+#define ST_ACCEL_1_ODR_AVL_50HZ_VAL 0x04
+#define ST_ACCEL_1_ODR_AVL_100HZ_VAL 0x05
+#define ST_ACCEL_1_ODR_AVL_200HZ_VAL 0x06
+#define ST_ACCEL_1_ODR_AVL_400HZ_VAL 0x07
+#define ST_ACCEL_1_ODR_AVL_1600HZ_VAL 0x08
+#define ST_ACCEL_1_FS_ADDR 0x23
+#define ST_ACCEL_1_FS_MASK 0x30
+#define ST_ACCEL_1_FS_AVL_2_VAL 0x00
+#define ST_ACCEL_1_FS_AVL_4_VAL 0x01
+#define ST_ACCEL_1_FS_AVL_8_VAL 0x02
+#define ST_ACCEL_1_FS_AVL_16_VAL 0x03
+#define ST_ACCEL_1_FS_AVL_2_GAIN IIO_G_TO_M_S_2(1000)
+#define ST_ACCEL_1_FS_AVL_4_GAIN IIO_G_TO_M_S_2(2000)
+#define ST_ACCEL_1_FS_AVL_8_GAIN IIO_G_TO_M_S_2(4000)
+#define ST_ACCEL_1_FS_AVL_16_GAIN IIO_G_TO_M_S_2(12000)
+#define ST_ACCEL_1_BDU_ADDR 0x23
+#define ST_ACCEL_1_BDU_MASK 0x80
+#define ST_ACCEL_1_DRDY_IRQ_ADDR 0x22
+#define ST_ACCEL_1_DRDY_IRQ_INT1_MASK 0x10
+#define ST_ACCEL_1_DRDY_IRQ_INT2_MASK 0x08
+#define ST_ACCEL_1_MULTIREAD_BIT true
+
+/* CUSTOM VALUES FOR SENSOR 2 */
+#define ST_ACCEL_2_WAI_EXP 0x32
+#define ST_ACCEL_2_ODR_ADDR 0x20
+#define ST_ACCEL_2_ODR_MASK 0x18
+#define ST_ACCEL_2_ODR_AVL_50HZ_VAL 0x00
+#define ST_ACCEL_2_ODR_AVL_100HZ_VAL 0x01
+#define ST_ACCEL_2_ODR_AVL_400HZ_VAL 0x02
+#define ST_ACCEL_2_ODR_AVL_1000HZ_VAL 0x03
+#define ST_ACCEL_2_PW_ADDR 0x20
+#define ST_ACCEL_2_PW_MASK 0xe0
+#define ST_ACCEL_2_FS_ADDR 0x23
+#define ST_ACCEL_2_FS_MASK 0x30
+#define ST_ACCEL_2_FS_AVL_2_VAL 0X00
+#define ST_ACCEL_2_FS_AVL_4_VAL 0X01
+#define ST_ACCEL_2_FS_AVL_8_VAL 0x03
+#define ST_ACCEL_2_FS_AVL_2_GAIN IIO_G_TO_M_S_2(1000)
+#define ST_ACCEL_2_FS_AVL_4_GAIN IIO_G_TO_M_S_2(2000)
+#define ST_ACCEL_2_FS_AVL_8_GAIN IIO_G_TO_M_S_2(3900)
+#define ST_ACCEL_2_BDU_ADDR 0x23
+#define ST_ACCEL_2_BDU_MASK 0x80
+#define ST_ACCEL_2_DRDY_IRQ_ADDR 0x22
+#define ST_ACCEL_2_DRDY_IRQ_INT1_MASK 0x02
+#define ST_ACCEL_2_DRDY_IRQ_INT2_MASK 0x10
+#define ST_ACCEL_2_MULTIREAD_BIT true
+
+/* CUSTOM VALUES FOR SENSOR 3 */
+#define ST_ACCEL_3_WAI_EXP 0x40
+#define ST_ACCEL_3_ODR_ADDR 0x20
+#define ST_ACCEL_3_ODR_MASK 0xf0
+#define ST_ACCEL_3_ODR_AVL_3HZ_VAL 0x01
+#define ST_ACCEL_3_ODR_AVL_6HZ_VAL 0x02
+#define ST_ACCEL_3_ODR_AVL_12HZ_VAL 0x03
+#define ST_ACCEL_3_ODR_AVL_25HZ_VAL 0x04
+#define ST_ACCEL_3_ODR_AVL_50HZ_VAL 0x05
+#define ST_ACCEL_3_ODR_AVL_100HZ_VAL 0x06
+#define ST_ACCEL_3_ODR_AVL_200HZ_VAL 0x07
+#define ST_ACCEL_3_ODR_AVL_400HZ_VAL 0x08
+#define ST_ACCEL_3_ODR_AVL_800HZ_VAL 0x09
+#define ST_ACCEL_3_ODR_AVL_1600HZ_VAL 0x0a
+#define ST_ACCEL_3_FS_ADDR 0x24
+#define ST_ACCEL_3_FS_MASK 0x38
+#define ST_ACCEL_3_FS_AVL_2_VAL 0X00
+#define ST_ACCEL_3_FS_AVL_4_VAL 0X01
+#define ST_ACCEL_3_FS_AVL_6_VAL 0x02
+#define ST_ACCEL_3_FS_AVL_8_VAL 0x03
+#define ST_ACCEL_3_FS_AVL_16_VAL 0x04
+#define ST_ACCEL_3_FS_AVL_2_GAIN IIO_G_TO_M_S_2(61)
+#define ST_ACCEL_3_FS_AVL_4_GAIN IIO_G_TO_M_S_2(122)
+#define ST_ACCEL_3_FS_AVL_6_GAIN IIO_G_TO_M_S_2(183)
+#define ST_ACCEL_3_FS_AVL_8_GAIN IIO_G_TO_M_S_2(244)
+#define ST_ACCEL_3_FS_AVL_16_GAIN IIO_G_TO_M_S_2(732)
+#define ST_ACCEL_3_BDU_ADDR 0x20
+#define ST_ACCEL_3_BDU_MASK 0x08
+#define ST_ACCEL_3_DRDY_IRQ_ADDR 0x23
+#define ST_ACCEL_3_DRDY_IRQ_INT1_MASK 0x80
+#define ST_ACCEL_3_DRDY_IRQ_INT2_MASK 0x00
+#define ST_ACCEL_3_IG1_EN_ADDR 0x23
+#define ST_ACCEL_3_IG1_EN_MASK 0x08
+#define ST_ACCEL_3_MULTIREAD_BIT false
+
+/* CUSTOM VALUES FOR SENSOR 4 */
+#define ST_ACCEL_4_WAI_EXP 0x3a
+#define ST_ACCEL_4_ODR_ADDR 0x20
+#define ST_ACCEL_4_ODR_MASK 0x30 /* DF1 and DF0 */
+#define ST_ACCEL_4_ODR_AVL_40HZ_VAL 0x00
+#define ST_ACCEL_4_ODR_AVL_160HZ_VAL 0x01
+#define ST_ACCEL_4_ODR_AVL_640HZ_VAL 0x02
+#define ST_ACCEL_4_ODR_AVL_2560HZ_VAL 0x03
+#define ST_ACCEL_4_PW_ADDR 0x20
+#define ST_ACCEL_4_PW_MASK 0xc0
+#define ST_ACCEL_4_FS_ADDR 0x21
+#define ST_ACCEL_4_FS_MASK 0x80
+#define ST_ACCEL_4_FS_AVL_2_VAL 0X00
+#define ST_ACCEL_4_FS_AVL_6_VAL 0X01
+#define ST_ACCEL_4_FS_AVL_2_GAIN IIO_G_TO_M_S_2(1024)
+#define ST_ACCEL_4_FS_AVL_6_GAIN IIO_G_TO_M_S_2(340)
+#define ST_ACCEL_4_BDU_ADDR 0x21
+#define ST_ACCEL_4_BDU_MASK 0x40
+#define ST_ACCEL_4_DRDY_IRQ_ADDR 0x21
+#define ST_ACCEL_4_DRDY_IRQ_INT1_MASK 0x04
+#define ST_ACCEL_4_IG1_EN_ADDR 0x21
+#define ST_ACCEL_4_IG1_EN_MASK 0x08
+#define ST_ACCEL_4_MULTIREAD_BIT true
+
+static const struct iio_chan_spec st_accel_12bit_channels[] = {
+ ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
+ BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+ ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 12, 16,
+ ST_ACCEL_DEFAULT_OUT_X_L_ADDR),
+ ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
+ BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+ ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 12, 16,
+ ST_ACCEL_DEFAULT_OUT_Y_L_ADDR),
+ ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
+ BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+ ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 12, 16,
+ ST_ACCEL_DEFAULT_OUT_Z_L_ADDR),
+ IIO_CHAN_SOFT_TIMESTAMP(3)
+};
+
+static const struct iio_chan_spec st_accel_16bit_channels[] = {
+ ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
+ BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+ ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 16, 16,
+ ST_ACCEL_DEFAULT_OUT_X_L_ADDR),
+ ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
+ BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+ ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 16, 16,
+ ST_ACCEL_DEFAULT_OUT_Y_L_ADDR),
+ ST_SENSORS_LSM_CHANNELS(IIO_ACCEL,
+ BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+ ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 16, 16,
+ ST_ACCEL_DEFAULT_OUT_Z_L_ADDR),
+ IIO_CHAN_SOFT_TIMESTAMP(3)
+};
+
+static const struct st_sensor_settings st_accel_sensors_settings[] = {
+ {
+ .wai = ST_ACCEL_1_WAI_EXP,
+ .sensors_supported = {
+ [0] = LIS3DH_ACCEL_DEV_NAME,
+ [1] = LSM303DLHC_ACCEL_DEV_NAME,
+ [2] = LSM330D_ACCEL_DEV_NAME,
+ [3] = LSM330DL_ACCEL_DEV_NAME,
+ [4] = LSM330DLC_ACCEL_DEV_NAME,
+ },
+ .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
+ .odr = {
+ .addr = ST_ACCEL_1_ODR_ADDR,
+ .mask = ST_ACCEL_1_ODR_MASK,
+ .odr_avl = {
+ { 1, ST_ACCEL_1_ODR_AVL_1HZ_VAL, },
+ { 10, ST_ACCEL_1_ODR_AVL_10HZ_VAL, },
+ { 25, ST_ACCEL_1_ODR_AVL_25HZ_VAL, },
+ { 50, ST_ACCEL_1_ODR_AVL_50HZ_VAL, },
+ { 100, ST_ACCEL_1_ODR_AVL_100HZ_VAL, },
+ { 200, ST_ACCEL_1_ODR_AVL_200HZ_VAL, },
+ { 400, ST_ACCEL_1_ODR_AVL_400HZ_VAL, },
+ { 1600, ST_ACCEL_1_ODR_AVL_1600HZ_VAL, },
+ },
+ },
+ .pw = {
+ .addr = ST_ACCEL_1_ODR_ADDR,
+ .mask = ST_ACCEL_1_ODR_MASK,
+ .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
+ },
+ .enable_axis = {
+ .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
+ .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
+ },
+ .fs = {
+ .addr = ST_ACCEL_1_FS_ADDR,
+ .mask = ST_ACCEL_1_FS_MASK,
+ .fs_avl = {
+ [0] = {
+ .num = ST_ACCEL_FS_AVL_2G,
+ .value = ST_ACCEL_1_FS_AVL_2_VAL,
+ .gain = ST_ACCEL_1_FS_AVL_2_GAIN,
+ },
+ [1] = {
+ .num = ST_ACCEL_FS_AVL_4G,
+ .value = ST_ACCEL_1_FS_AVL_4_VAL,
+ .gain = ST_ACCEL_1_FS_AVL_4_GAIN,
+ },
+ [2] = {
+ .num = ST_ACCEL_FS_AVL_8G,
+ .value = ST_ACCEL_1_FS_AVL_8_VAL,
+ .gain = ST_ACCEL_1_FS_AVL_8_GAIN,
+ },
+ [3] = {
+ .num = ST_ACCEL_FS_AVL_16G,
+ .value = ST_ACCEL_1_FS_AVL_16_VAL,
+ .gain = ST_ACCEL_1_FS_AVL_16_GAIN,
+ },
+ },
+ },
+ .bdu = {
+ .addr = ST_ACCEL_1_BDU_ADDR,
+ .mask = ST_ACCEL_1_BDU_MASK,
+ },
+ .drdy_irq = {
+ .addr = ST_ACCEL_1_DRDY_IRQ_ADDR,
+ .mask_int1 = ST_ACCEL_1_DRDY_IRQ_INT1_MASK,
+ .mask_int2 = ST_ACCEL_1_DRDY_IRQ_INT2_MASK,
+ },
+ .multi_read_bit = ST_ACCEL_1_MULTIREAD_BIT,
+ .bootime = 2,
+ },
+ {
+ .wai = ST_ACCEL_2_WAI_EXP,
+ .sensors_supported = {
+ [0] = LIS331DLH_ACCEL_DEV_NAME,
+ [1] = LSM303DL_ACCEL_DEV_NAME,
+ [2] = LSM303DLH_ACCEL_DEV_NAME,
+ [3] = LSM303DLM_ACCEL_DEV_NAME,
+ },
+ .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
+ .odr = {
+ .addr = ST_ACCEL_2_ODR_ADDR,
+ .mask = ST_ACCEL_2_ODR_MASK,
+ .odr_avl = {
+ { 50, ST_ACCEL_2_ODR_AVL_50HZ_VAL, },
+ { 100, ST_ACCEL_2_ODR_AVL_100HZ_VAL, },
+ { 400, ST_ACCEL_2_ODR_AVL_400HZ_VAL, },
+ { 1000, ST_ACCEL_2_ODR_AVL_1000HZ_VAL, },
+ },
+ },
+ .pw = {
+ .addr = ST_ACCEL_2_PW_ADDR,
+ .mask = ST_ACCEL_2_PW_MASK,
+ .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
+ .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
+ },
+ .enable_axis = {
+ .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
+ .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
+ },
+ .fs = {
+ .addr = ST_ACCEL_2_FS_ADDR,
+ .mask = ST_ACCEL_2_FS_MASK,
+ .fs_avl = {
+ [0] = {
+ .num = ST_ACCEL_FS_AVL_2G,
+ .value = ST_ACCEL_2_FS_AVL_2_VAL,
+ .gain = ST_ACCEL_2_FS_AVL_2_GAIN,
+ },
+ [1] = {
+ .num = ST_ACCEL_FS_AVL_4G,
+ .value = ST_ACCEL_2_FS_AVL_4_VAL,
+ .gain = ST_ACCEL_2_FS_AVL_4_GAIN,
+ },
+ [2] = {
+ .num = ST_ACCEL_FS_AVL_8G,
+ .value = ST_ACCEL_2_FS_AVL_8_VAL,
+ .gain = ST_ACCEL_2_FS_AVL_8_GAIN,
+ },
+ },
+ },
+ .bdu = {
+ .addr = ST_ACCEL_2_BDU_ADDR,
+ .mask = ST_ACCEL_2_BDU_MASK,
+ },
+ .drdy_irq = {
+ .addr = ST_ACCEL_2_DRDY_IRQ_ADDR,
+ .mask_int1 = ST_ACCEL_2_DRDY_IRQ_INT1_MASK,
+ .mask_int2 = ST_ACCEL_2_DRDY_IRQ_INT2_MASK,
+ },
+ .multi_read_bit = ST_ACCEL_2_MULTIREAD_BIT,
+ .bootime = 2,
+ },
+ {
+ .wai = ST_ACCEL_3_WAI_EXP,
+ .sensors_supported = {
+ [0] = LSM330_ACCEL_DEV_NAME,
+ },
+ .ch = (struct iio_chan_spec *)st_accel_16bit_channels,
+ .odr = {
+ .addr = ST_ACCEL_3_ODR_ADDR,
+ .mask = ST_ACCEL_3_ODR_MASK,
+ .odr_avl = {
+ { 3, ST_ACCEL_3_ODR_AVL_3HZ_VAL },
+ { 6, ST_ACCEL_3_ODR_AVL_6HZ_VAL, },
+ { 12, ST_ACCEL_3_ODR_AVL_12HZ_VAL, },
+ { 25, ST_ACCEL_3_ODR_AVL_25HZ_VAL, },
+ { 50, ST_ACCEL_3_ODR_AVL_50HZ_VAL, },
+ { 100, ST_ACCEL_3_ODR_AVL_100HZ_VAL, },
+ { 200, ST_ACCEL_3_ODR_AVL_200HZ_VAL, },
+ { 400, ST_ACCEL_3_ODR_AVL_400HZ_VAL, },
+ { 800, ST_ACCEL_3_ODR_AVL_800HZ_VAL, },
+ { 1600, ST_ACCEL_3_ODR_AVL_1600HZ_VAL, },
+ },
+ },
+ .pw = {
+ .addr = ST_ACCEL_3_ODR_ADDR,
+ .mask = ST_ACCEL_3_ODR_MASK,
+ .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
+ },
+ .enable_axis = {
+ .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
+ .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
+ },
+ .fs = {
+ .addr = ST_ACCEL_3_FS_ADDR,
+ .mask = ST_ACCEL_3_FS_MASK,
+ .fs_avl = {
+ [0] = {
+ .num = ST_ACCEL_FS_AVL_2G,
+ .value = ST_ACCEL_3_FS_AVL_2_VAL,
+ .gain = ST_ACCEL_3_FS_AVL_2_GAIN,
+ },
+ [1] = {
+ .num = ST_ACCEL_FS_AVL_4G,
+ .value = ST_ACCEL_3_FS_AVL_4_VAL,
+ .gain = ST_ACCEL_3_FS_AVL_4_GAIN,
+ },
+ [2] = {
+ .num = ST_ACCEL_FS_AVL_6G,
+ .value = ST_ACCEL_3_FS_AVL_6_VAL,
+ .gain = ST_ACCEL_3_FS_AVL_6_GAIN,
+ },
+ [3] = {
+ .num = ST_ACCEL_FS_AVL_8G,
+ .value = ST_ACCEL_3_FS_AVL_8_VAL,
+ .gain = ST_ACCEL_3_FS_AVL_8_GAIN,
+ },
+ [4] = {
+ .num = ST_ACCEL_FS_AVL_16G,
+ .value = ST_ACCEL_3_FS_AVL_16_VAL,
+ .gain = ST_ACCEL_3_FS_AVL_16_GAIN,
+ },
+ },
+ },
+ .bdu = {
+ .addr = ST_ACCEL_3_BDU_ADDR,
+ .mask = ST_ACCEL_3_BDU_MASK,
+ },
+ .drdy_irq = {
+ .addr = ST_ACCEL_3_DRDY_IRQ_ADDR,
+ .mask_int1 = ST_ACCEL_3_DRDY_IRQ_INT1_MASK,
+ .mask_int2 = ST_ACCEL_3_DRDY_IRQ_INT2_MASK,
+ .ig1 = {
+ .en_addr = ST_ACCEL_3_IG1_EN_ADDR,
+ .en_mask = ST_ACCEL_3_IG1_EN_MASK,
+ },
+ },
+ .multi_read_bit = ST_ACCEL_3_MULTIREAD_BIT,
+ .bootime = 2,
+ },
+ {
+ .wai = ST_ACCEL_4_WAI_EXP,
+ .sensors_supported = {
+ [0] = LIS3LV02DL_ACCEL_DEV_NAME,
+ },
+ .ch = (struct iio_chan_spec *)st_accel_12bit_channels,
+ .odr = {
+ .addr = ST_ACCEL_4_ODR_ADDR,
+ .mask = ST_ACCEL_4_ODR_MASK,
+ .odr_avl = {
+ { 40, ST_ACCEL_4_ODR_AVL_40HZ_VAL },
+ { 160, ST_ACCEL_4_ODR_AVL_160HZ_VAL, },
+ { 640, ST_ACCEL_4_ODR_AVL_640HZ_VAL, },
+ { 2560, ST_ACCEL_4_ODR_AVL_2560HZ_VAL, },
+ },
+ },
+ .pw = {
+ .addr = ST_ACCEL_4_PW_ADDR,
+ .mask = ST_ACCEL_4_PW_MASK,
+ .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
+ .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
+ },
+ .enable_axis = {
+ .addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
+ .mask = ST_SENSORS_DEFAULT_AXIS_MASK,
+ },
+ .fs = {
+ .addr = ST_ACCEL_4_FS_ADDR,
+ .mask = ST_ACCEL_4_FS_MASK,
+ .fs_avl = {
+ [0] = {
+ .num = ST_ACCEL_FS_AVL_2G,
+ .value = ST_ACCEL_4_FS_AVL_2_VAL,
+ .gain = ST_ACCEL_4_FS_AVL_2_GAIN,
+ },
+ [1] = {
+ .num = ST_ACCEL_FS_AVL_6G,
+ .value = ST_ACCEL_4_FS_AVL_6_VAL,
+ .gain = ST_ACCEL_4_FS_AVL_6_GAIN,
+ },
+ },
+ },
+ .bdu = {
+ .addr = ST_ACCEL_4_BDU_ADDR,
+ .mask = ST_ACCEL_4_BDU_MASK,
+ },
+ .drdy_irq = {
+ .addr = ST_ACCEL_4_DRDY_IRQ_ADDR,
+ .mask_int1 = ST_ACCEL_4_DRDY_IRQ_INT1_MASK,
+ .ig1 = {
+ .en_addr = ST_ACCEL_4_IG1_EN_ADDR,
+ .en_mask = ST_ACCEL_4_IG1_EN_MASK,
+ },
+ },
+ .multi_read_bit = ST_ACCEL_4_MULTIREAD_BIT,
+ .bootime = 2, /* guess */
+ },
+};
+
+static int st_accel_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *ch, int *val,
+ int *val2, long mask)
+{
+ int err;
+ struct st_sensor_data *adata = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ err = st_sensors_read_info_raw(indio_dev, ch, val);
+ if (err < 0)
+ goto read_error;
+
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ *val = 0;
+ *val2 = adata->current_fullscale->gain;
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ *val = adata->odr;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+
+read_error:
+ return err;
+}
+
+static int st_accel_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int val, int val2, long mask)
+{
+ int err;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SCALE:
+ err = st_sensors_set_fullscale_by_gain(indio_dev, val2);
+ break;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ if (val2)
+ return -EINVAL;
+ mutex_lock(&indio_dev->mlock);
+ err = st_sensors_set_odr(indio_dev, val);
+ mutex_unlock(&indio_dev->mlock);
+ return err;
+ default:
+ return -EINVAL;
+ }
+
+ return err;
+}
+
+static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
+static ST_SENSORS_DEV_ATTR_SCALE_AVAIL(in_accel_scale_available);
+
+static struct attribute *st_accel_attributes[] = {
+ &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
+ &iio_dev_attr_in_accel_scale_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group st_accel_attribute_group = {
+ .attrs = st_accel_attributes,
+};
+
+static const struct iio_info accel_info = {
+ .driver_module = THIS_MODULE,
+ .attrs = &st_accel_attribute_group,
+ .read_raw = &st_accel_read_raw,
+ .write_raw = &st_accel_write_raw,
+};
+
+#ifdef CONFIG_IIO_TRIGGER
+static const struct iio_trigger_ops st_accel_trigger_ops = {
+ .owner = THIS_MODULE,
+ .set_trigger_state = ST_ACCEL_TRIGGER_SET_STATE,
+};
+#define ST_ACCEL_TRIGGER_OPS (&st_accel_trigger_ops)
+#else
+#define ST_ACCEL_TRIGGER_OPS NULL
+#endif
+
+int st_accel_common_probe(struct iio_dev *indio_dev)
+{
+ struct st_sensor_data *adata = iio_priv(indio_dev);
+ int irq = adata->get_irq_data_ready(indio_dev);
+ int err;
+
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->info = &accel_info;
+ mutex_init(&adata->tb.buf_lock);
+
+ st_sensors_power_enable(indio_dev);
+
+ err = st_sensors_check_device_support(indio_dev,
+ ARRAY_SIZE(st_accel_sensors_settings),
+ st_accel_sensors_settings);
+ if (err < 0)
+ return err;
+
+ adata->num_data_channels = ST_ACCEL_NUMBER_DATA_CHANNELS;
+ adata->multiread_bit = adata->sensor_settings->multi_read_bit;
+ indio_dev->channels = adata->sensor_settings->ch;
+ indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS;
+
+ adata->current_fullscale = (struct st_sensor_fullscale_avl *)
+ &adata->sensor_settings->fs.fs_avl[0];
+ adata->odr = adata->sensor_settings->odr.odr_avl[0].hz;
+
+ if (!adata->dev->platform_data)
+ adata->dev->platform_data =
+ (struct st_sensors_platform_data *)&default_accel_pdata;
+
+ err = st_sensors_init_sensor(indio_dev, adata->dev->platform_data);
+ if (err < 0)
+ return err;
+
+ err = st_accel_allocate_ring(indio_dev);
+ if (err < 0)
+ return err;
+
+ if (irq > 0) {
+ err = st_sensors_allocate_trigger(indio_dev,
+ ST_ACCEL_TRIGGER_OPS);
+ if (err < 0)
+ goto st_accel_probe_trigger_error;
+ }
+
+ err = iio_device_register(indio_dev);
+ if (err)
+ goto st_accel_device_register_error;
+
+ dev_info(&indio_dev->dev, "registered accelerometer %s\n",
+ indio_dev->name);
+
+ return 0;
+
+st_accel_device_register_error:
+ if (irq > 0)
+ st_sensors_deallocate_trigger(indio_dev);
+st_accel_probe_trigger_error:
+ st_accel_deallocate_ring(indio_dev);
+
+ return err;
+}
+EXPORT_SYMBOL(st_accel_common_probe);
+
+void st_accel_common_remove(struct iio_dev *indio_dev)
+{
+ struct st_sensor_data *adata = iio_priv(indio_dev);
+
+ st_sensors_power_disable(indio_dev);
+
+ iio_device_unregister(indio_dev);
+ if (adata->get_irq_data_ready(indio_dev) > 0)
+ st_sensors_deallocate_trigger(indio_dev);
+
+ st_accel_deallocate_ring(indio_dev);
+}
+EXPORT_SYMBOL(st_accel_common_remove);
+
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics accelerometers driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/st_accel_i2c.c b/drivers/iio/accel/st_accel_i2c.c
new file mode 100644
index 000000000..6b720c190
--- /dev/null
+++ b/drivers/iio/accel/st_accel_i2c.c
@@ -0,0 +1,133 @@
+/*
+ * STMicroelectronics accelerometers driver
+ *
+ * Copyright 2012-2013 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@st.com>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/iio/iio.h>
+
+#include <linux/iio/common/st_sensors.h>
+#include <linux/iio/common/st_sensors_i2c.h>
+#include "st_accel.h"
+
+#ifdef CONFIG_OF
+static const struct of_device_id st_accel_of_match[] = {
+ {
+ .compatible = "st,lis3lv02dl-accel",
+ .data = LIS3LV02DL_ACCEL_DEV_NAME,
+ },
+ {
+ .compatible = "st,lsm303dlh-accel",
+ .data = LSM303DLH_ACCEL_DEV_NAME,
+ },
+ {
+ .compatible = "st,lsm303dlhc-accel",
+ .data = LSM303DLHC_ACCEL_DEV_NAME,
+ },
+ {
+ .compatible = "st,lis3dh-accel",
+ .data = LIS3DH_ACCEL_DEV_NAME,
+ },
+ {
+ .compatible = "st,lsm330d-accel",
+ .data = LSM330D_ACCEL_DEV_NAME,
+ },
+ {
+ .compatible = "st,lsm330dl-accel",
+ .data = LSM330DL_ACCEL_DEV_NAME,
+ },
+ {
+ .compatible = "st,lsm330dlc-accel",
+ .data = LSM330DLC_ACCEL_DEV_NAME,
+ },
+ {
+ .compatible = "st,lis331dlh-accel",
+ .data = LIS331DLH_ACCEL_DEV_NAME,
+ },
+ {
+ .compatible = "st,lsm303dl-accel",
+ .data = LSM303DL_ACCEL_DEV_NAME,
+ },
+ {
+ .compatible = "st,lsm303dlm-accel",
+ .data = LSM303DLM_ACCEL_DEV_NAME,
+ },
+ {
+ .compatible = "st,lsm330-accel",
+ .data = LSM330_ACCEL_DEV_NAME,
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, st_accel_of_match);
+#else
+#define st_accel_of_match NULL
+#endif
+
+static int st_accel_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct iio_dev *indio_dev;
+ struct st_sensor_data *adata;
+ int err;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*adata));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ adata = iio_priv(indio_dev);
+ st_sensors_of_i2c_probe(client, st_accel_of_match);
+
+ st_sensors_i2c_configure(indio_dev, client, adata);
+
+ err = st_accel_common_probe(indio_dev);
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+
+static int st_accel_i2c_remove(struct i2c_client *client)
+{
+ st_accel_common_remove(i2c_get_clientdata(client));
+
+ return 0;
+}
+
+static const struct i2c_device_id st_accel_id_table[] = {
+ { LSM303DLH_ACCEL_DEV_NAME },
+ { LSM303DLHC_ACCEL_DEV_NAME },
+ { LIS3DH_ACCEL_DEV_NAME },
+ { LSM330D_ACCEL_DEV_NAME },
+ { LSM330DL_ACCEL_DEV_NAME },
+ { LSM330DLC_ACCEL_DEV_NAME },
+ { LIS331DLH_ACCEL_DEV_NAME },
+ { LSM303DL_ACCEL_DEV_NAME },
+ { LSM303DLM_ACCEL_DEV_NAME },
+ { LSM330_ACCEL_DEV_NAME },
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, st_accel_id_table);
+
+static struct i2c_driver st_accel_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "st-accel-i2c",
+ .of_match_table = of_match_ptr(st_accel_of_match),
+ },
+ .probe = st_accel_i2c_probe,
+ .remove = st_accel_i2c_remove,
+ .id_table = st_accel_id_table,
+};
+module_i2c_driver(st_accel_driver);
+
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics accelerometers i2c driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/st_accel_spi.c b/drivers/iio/accel/st_accel_spi.c
new file mode 100644
index 000000000..12ec29389
--- /dev/null
+++ b/drivers/iio/accel/st_accel_spi.c
@@ -0,0 +1,77 @@
+/*
+ * STMicroelectronics accelerometers driver
+ *
+ * Copyright 2012-2013 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@st.com>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/spi/spi.h>
+#include <linux/iio/iio.h>
+
+#include <linux/iio/common/st_sensors.h>
+#include <linux/iio/common/st_sensors_spi.h>
+#include "st_accel.h"
+
+static int st_accel_spi_probe(struct spi_device *spi)
+{
+ struct iio_dev *indio_dev;
+ struct st_sensor_data *adata;
+ int err;
+
+ indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*adata));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ adata = iio_priv(indio_dev);
+
+ st_sensors_spi_configure(indio_dev, spi, adata);
+
+ err = st_accel_common_probe(indio_dev);
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+
+static int st_accel_spi_remove(struct spi_device *spi)
+{
+ st_accel_common_remove(spi_get_drvdata(spi));
+
+ return 0;
+}
+
+static const struct spi_device_id st_accel_id_table[] = {
+ { LSM303DLH_ACCEL_DEV_NAME },
+ { LSM303DLHC_ACCEL_DEV_NAME },
+ { LIS3DH_ACCEL_DEV_NAME },
+ { LSM330D_ACCEL_DEV_NAME },
+ { LSM330DL_ACCEL_DEV_NAME },
+ { LSM330DLC_ACCEL_DEV_NAME },
+ { LIS331DLH_ACCEL_DEV_NAME },
+ { LSM303DL_ACCEL_DEV_NAME },
+ { LSM303DLM_ACCEL_DEV_NAME },
+ { LSM330_ACCEL_DEV_NAME },
+ {},
+};
+MODULE_DEVICE_TABLE(spi, st_accel_id_table);
+
+static struct spi_driver st_accel_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "st-accel-spi",
+ },
+ .probe = st_accel_spi_probe,
+ .remove = st_accel_spi_remove,
+ .id_table = st_accel_id_table,
+};
+module_spi_driver(st_accel_driver);
+
+MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics accelerometers spi driver");
+MODULE_LICENSE("GPL v2");