Initial import

1 files changed, 1579 insertions, 0 deletions

diff --git a/drivers/iio/imu/kmx61.c b/drivers/iio/imu/kmx61.c
new file mode 100644
index 000000000..462a01062
--- /dev/null
+++ b/drivers/iio/imu/kmx61.c
@@ -0,0 +1,1579 @@
+/*
+ * KMX61 - Kionix 6-axis Accelerometer/Magnetometer
+ *
+ * Copyright (c) 2014, Intel Corporation.
+ *
+ * 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.
+ *
+ * IIO driver for KMX61 (7-bit I2C slave address 0x0E or 0x0F).
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/acpi.h>
+#include <linux/gpio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/pm.h>
+#include <linux/pm_runtime.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/events.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/iio/trigger_consumer.h>
+
+#define KMX61_DRV_NAME "kmx61"
+#define KMX61_GPIO_NAME "kmx61_int"
+#define KMX61_IRQ_NAME "kmx61_event"
+
+#define KMX61_REG_WHO_AM_I	0x00
+#define KMX61_REG_INS1		0x01
+#define KMX61_REG_INS2		0x02
+
+/*
+ * three 16-bit accelerometer output registers for X/Y/Z axis
+ * we use only XOUT_L as a base register, all other addresses
+ * can be obtained by applying an offset and are provided here
+ * only for clarity.
+ */
+#define KMX61_ACC_XOUT_L	0x0A
+#define KMX61_ACC_XOUT_H	0x0B
+#define KMX61_ACC_YOUT_L	0x0C
+#define KMX61_ACC_YOUT_H	0x0D
+#define KMX61_ACC_ZOUT_L	0x0E
+#define KMX61_ACC_ZOUT_H	0x0F
+
+/*
+ * one 16-bit temperature output register
+ */
+#define KMX61_TEMP_L		0x10
+#define KMX61_TEMP_H		0x11
+
+/*
+ * three 16-bit magnetometer output registers for X/Y/Z axis
+ */
+#define KMX61_MAG_XOUT_L	0x12
+#define KMX61_MAG_XOUT_H	0x13
+#define KMX61_MAG_YOUT_L	0x14
+#define KMX61_MAG_YOUT_H	0x15
+#define KMX61_MAG_ZOUT_L	0x16
+#define KMX61_MAG_ZOUT_H	0x17
+
+#define KMX61_REG_INL		0x28
+#define KMX61_REG_STBY		0x29
+#define KMX61_REG_CTRL1		0x2A
+#define KMX61_REG_CTRL2		0x2B
+#define KMX61_REG_ODCNTL	0x2C
+#define KMX61_REG_INC1		0x2D
+
+#define KMX61_REG_WUF_THRESH	0x3D
+#define KMX61_REG_WUF_TIMER	0x3E
+
+#define KMX61_ACC_STBY_BIT	BIT(0)
+#define KMX61_MAG_STBY_BIT	BIT(1)
+#define KMX61_ACT_STBY_BIT	BIT(7)
+
+#define KMX61_ALL_STBY		(KMX61_ACC_STBY_BIT | KMX61_MAG_STBY_BIT)
+
+#define KMX61_REG_INS1_BIT_WUFS		BIT(1)
+
+#define KMX61_REG_INS2_BIT_ZP		BIT(0)
+#define KMX61_REG_INS2_BIT_ZN		BIT(1)
+#define KMX61_REG_INS2_BIT_YP		BIT(2)
+#define KMX61_REG_INS2_BIT_YN		BIT(3)
+#define KMX61_REG_INS2_BIT_XP		BIT(4)
+#define KMX61_REG_INS2_BIT_XN		BIT(5)
+
+#define KMX61_REG_CTRL1_GSEL_MASK	0x03
+
+#define KMX61_REG_CTRL1_BIT_RES		BIT(4)
+#define KMX61_REG_CTRL1_BIT_DRDYE	BIT(5)
+#define KMX61_REG_CTRL1_BIT_WUFE	BIT(6)
+#define KMX61_REG_CTRL1_BIT_BTSE	BIT(7)
+
+#define KMX61_REG_INC1_BIT_WUFS		BIT(0)
+#define KMX61_REG_INC1_BIT_DRDYM	BIT(1)
+#define KMX61_REG_INC1_BIT_DRDYA	BIT(2)
+#define KMX61_REG_INC1_BIT_IEN		BIT(5)
+
+#define KMX61_ACC_ODR_SHIFT	0
+#define KMX61_MAG_ODR_SHIFT	4
+#define KMX61_ACC_ODR_MASK	0x0F
+#define KMX61_MAG_ODR_MASK	0xF0
+
+#define KMX61_OWUF_MASK		0x7
+
+#define KMX61_DEFAULT_WAKE_THRESH	1
+#define KMX61_DEFAULT_WAKE_DURATION	1
+
+#define KMX61_SLEEP_DELAY_MS	2000
+
+#define KMX61_CHIP_ID		0x12
+
+/* KMX61 devices */
+#define KMX61_ACC	0x01
+#define KMX61_MAG	0x02
+
+struct kmx61_data {
+	struct i2c_client *client;
+
+	/* serialize access to non-atomic ops, e.g set_mode */
+	struct mutex lock;
+
+	/* standby state */
+	bool acc_stby;
+	bool mag_stby;
+
+	/* power state */
+	bool acc_ps;
+	bool mag_ps;
+
+	/* config bits */
+	u8 range;
+	u8 odr_bits;
+	u8 wake_thresh;
+	u8 wake_duration;
+
+	/* accelerometer specific data */
+	struct iio_dev *acc_indio_dev;
+	struct iio_trigger *acc_dready_trig;
+	struct iio_trigger *motion_trig;
+	bool acc_dready_trig_on;
+	bool motion_trig_on;
+	bool ev_enable_state;
+
+	/* magnetometer specific data */
+	struct iio_dev *mag_indio_dev;
+	struct iio_trigger *mag_dready_trig;
+	bool mag_dready_trig_on;
+};
+
+enum kmx61_range {
+	KMX61_RANGE_2G,
+	KMX61_RANGE_4G,
+	KMX61_RANGE_8G,
+};
+
+enum kmx61_axis {
+	KMX61_AXIS_X,
+	KMX61_AXIS_Y,
+	KMX61_AXIS_Z,
+};
+
+static const u16 kmx61_uscale_table[] = {9582, 19163, 38326};
+
+static const struct {
+	int val;
+	int val2;
+} kmx61_samp_freq_table[] = { {12, 500000},
+			{25, 0},
+			{50, 0},
+			{100, 0},
+			{200, 0},
+			{400, 0},
+			{800, 0},
+			{1600, 0},
+			{0, 781000},
+			{1, 563000},
+			{3, 125000},
+			{6, 250000} };
+
+static const struct {
+	int val;
+	int val2;
+	int odr_bits;
+} kmx61_wake_up_odr_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 IIO_CONST_ATTR(accel_scale_available, "0.009582 0.019163 0.038326");
+static IIO_CONST_ATTR(magn_scale_available, "0.001465");
+static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(
+	"0.781000 1.563000 3.125000 6.250000 12.500000 25 50 100 200 400 800");
+
+static struct attribute *kmx61_acc_attributes[] = {
+	&iio_const_attr_accel_scale_available.dev_attr.attr,
+	&iio_const_attr_sampling_frequency_available.dev_attr.attr,
+	NULL,
+};
+
+static struct attribute *kmx61_mag_attributes[] = {
+	&iio_const_attr_magn_scale_available.dev_attr.attr,
+	&iio_const_attr_sampling_frequency_available.dev_attr.attr,
+	NULL,
+};
+
+static const struct attribute_group kmx61_acc_attribute_group = {
+	.attrs = kmx61_acc_attributes,
+};
+
+static const struct attribute_group kmx61_mag_attribute_group = {
+	.attrs = kmx61_mag_attributes,
+};
+
+static const struct iio_event_spec kmx61_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 KMX61_ACC_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) | \
+				BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+	.address = KMX61_ACC, \
+	.scan_index = KMX61_AXIS_ ## _axis, \
+	.scan_type = { \
+		.sign = 's', \
+		.realbits = 12, \
+		.storagebits = 16, \
+		.shift = 4, \
+		.endianness = IIO_LE, \
+	}, \
+	.event_spec = &kmx61_event, \
+	.num_event_specs = 1 \
+}
+
+#define KMX61_MAG_CHAN(_axis) { \
+	.type = IIO_MAGN, \
+	.modified = 1, \
+	.channel2 = IIO_MOD_ ## _axis, \
+	.address = KMX61_MAG, \
+	.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 = KMX61_AXIS_ ## _axis, \
+	.scan_type = { \
+		.sign = 's', \
+		.realbits = 14, \
+		.storagebits = 16, \
+		.shift = 2, \
+		.endianness = IIO_LE, \
+	}, \
+}
+
+static const struct iio_chan_spec kmx61_acc_channels[] = {
+	KMX61_ACC_CHAN(X),
+	KMX61_ACC_CHAN(Y),
+	KMX61_ACC_CHAN(Z),
+};
+
+static const struct iio_chan_spec kmx61_mag_channels[] = {
+	KMX61_MAG_CHAN(X),
+	KMX61_MAG_CHAN(Y),
+	KMX61_MAG_CHAN(Z),
+};
+
+static void kmx61_set_data(struct iio_dev *indio_dev, struct kmx61_data *data)
+{
+	struct kmx61_data **priv = iio_priv(indio_dev);
+
+	*priv = data;
+}
+
+static struct kmx61_data *kmx61_get_data(struct iio_dev *indio_dev)
+{
+	return *(struct kmx61_data **)iio_priv(indio_dev);
+}
+
+static int kmx61_convert_freq_to_bit(int val, int val2)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(kmx61_samp_freq_table); i++)
+		if (val == kmx61_samp_freq_table[i].val &&
+		    val2 == kmx61_samp_freq_table[i].val2)
+			return i;
+	return -EINVAL;
+}
+
+static int kmx61_convert_wake_up_odr_to_bit(int val, int val2)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(kmx61_wake_up_odr_table); ++i)
+		if (kmx61_wake_up_odr_table[i].val == val &&
+			kmx61_wake_up_odr_table[i].val2 == val2)
+				return kmx61_wake_up_odr_table[i].odr_bits;
+	return -EINVAL;
+}
+
+/**
+ * kmx61_set_mode() - set KMX61 device operating mode
+ * @data - kmx61 device private data pointer
+ * @mode - bitmask, indicating operating mode for @device
+ * @device - bitmask, indicating device for which @mode needs to be set
+ * @update - update stby bits stored in device's private  @data
+ *
+ * For each sensor (accelerometer/magnetometer) there are two operating modes
+ * STANDBY and OPERATION. Neither accel nor magn can be disabled independently
+ * if they are both enabled. Internal sensors state is saved in acc_stby and
+ * mag_stby members of driver's private @data.
+ */
+static int kmx61_set_mode(struct kmx61_data *data, u8 mode, u8 device,
+			  bool update)
+{
+	int ret;
+	int acc_stby = -1, mag_stby = -1;
+
+	ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_STBY);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_stby\n");
+		return ret;
+	}
+	if (device & KMX61_ACC) {
+		if (mode & KMX61_ACC_STBY_BIT) {
+			ret |= KMX61_ACC_STBY_BIT;
+			acc_stby = 1;
+		} else {
+			ret &= ~KMX61_ACC_STBY_BIT;
+			acc_stby = 0;
+		}
+	}
+
+	if (device & KMX61_MAG) {
+		if (mode & KMX61_MAG_STBY_BIT) {
+			ret |= KMX61_MAG_STBY_BIT;
+			mag_stby = 1;
+		} else {
+			ret &= ~KMX61_MAG_STBY_BIT;
+			mag_stby = 0;
+		}
+	}
+
+	if (mode & KMX61_ACT_STBY_BIT)
+		ret |= KMX61_ACT_STBY_BIT;
+
+	ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_STBY, ret);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error writing reg_stby\n");
+		return ret;
+	}
+
+	if (acc_stby != -1 && update)
+		data->acc_stby = acc_stby;
+	if (mag_stby != -1 && update)
+		data->mag_stby = mag_stby;
+
+	return 0;
+}
+
+static int kmx61_get_mode(struct kmx61_data *data, u8 *mode, u8 device)
+{
+	int ret;
+
+	ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_STBY);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_stby\n");
+		return ret;
+	}
+	*mode = 0;
+
+	if (device & KMX61_ACC) {
+		if (ret & KMX61_ACC_STBY_BIT)
+			*mode |= KMX61_ACC_STBY_BIT;
+		else
+			*mode &= ~KMX61_ACC_STBY_BIT;
+	}
+
+	if (device & KMX61_MAG) {
+		if (ret & KMX61_MAG_STBY_BIT)
+			*mode |= KMX61_MAG_STBY_BIT;
+		else
+			*mode &= ~KMX61_MAG_STBY_BIT;
+	}
+
+	return 0;
+}
+
+static int kmx61_set_wake_up_odr(struct kmx61_data *data, int val, int val2)
+{
+	int ret, odr_bits;
+
+	odr_bits = kmx61_convert_wake_up_odr_to_bit(val, val2);
+	if (odr_bits < 0)
+		return odr_bits;
+
+	ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL2,
+					odr_bits);
+	if (ret < 0)
+		dev_err(&data->client->dev, "Error writing reg_ctrl2\n");
+	return ret;
+}
+
+static int kmx61_set_odr(struct kmx61_data *data, int val, int val2, u8 device)
+{
+	int ret;
+	u8 mode;
+	int lodr_bits, odr_bits;
+
+	ret = kmx61_get_mode(data, &mode, KMX61_ACC | KMX61_MAG);
+	if (ret < 0)
+		return ret;
+
+	lodr_bits = kmx61_convert_freq_to_bit(val, val2);
+	if (lodr_bits < 0)
+		return lodr_bits;
+
+	/* To change ODR, accel and magn must be in STDBY */
+	ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG,
+			     true);
+	if (ret < 0)
+		return ret;
+
+	odr_bits = 0;
+	if (device & KMX61_ACC)
+		odr_bits |= lodr_bits << KMX61_ACC_ODR_SHIFT;
+	if (device & KMX61_MAG)
+		odr_bits |= lodr_bits << KMX61_MAG_ODR_SHIFT;
+
+	ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_ODCNTL,
+					odr_bits);
+	if (ret < 0)
+		return ret;
+
+	data->odr_bits = odr_bits;
+
+	if (device & KMX61_ACC) {
+		ret = kmx61_set_wake_up_odr(data, val, val2);
+		if (ret)
+			return ret;
+	}
+
+	return kmx61_set_mode(data, mode, KMX61_ACC | KMX61_MAG, true);
+}
+
+static int kmx61_get_odr(struct kmx61_data *data, int *val, int *val2,
+			 u8 device)
+{
+	u8 lodr_bits;
+
+	if (device & KMX61_ACC)
+		lodr_bits = (data->odr_bits >> KMX61_ACC_ODR_SHIFT) &
+			     KMX61_ACC_ODR_MASK;
+	else if (device & KMX61_MAG)
+		lodr_bits = (data->odr_bits >> KMX61_MAG_ODR_SHIFT) &
+			     KMX61_MAG_ODR_MASK;
+	else
+		return -EINVAL;
+
+	if (lodr_bits >= ARRAY_SIZE(kmx61_samp_freq_table))
+		return -EINVAL;
+
+	*val = kmx61_samp_freq_table[lodr_bits].val;
+	*val2 = kmx61_samp_freq_table[lodr_bits].val2;
+
+	return 0;
+}
+
+static int kmx61_set_range(struct kmx61_data *data, u8 range)
+{
+	int ret;
+
+	ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
+		return ret;
+	}
+
+	ret &= ~KMX61_REG_CTRL1_GSEL_MASK;
+	ret |= range & KMX61_REG_CTRL1_GSEL_MASK;
+
+	ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
+		return ret;
+	}
+
+	data->range = range;
+
+	return 0;
+}
+
+static int kmx61_set_scale(struct kmx61_data *data, u16 uscale)
+{
+	int ret, i;
+	u8  mode;
+
+	for (i = 0; i < ARRAY_SIZE(kmx61_uscale_table); i++) {
+		if (kmx61_uscale_table[i] == uscale) {
+			ret = kmx61_get_mode(data, &mode,
+					     KMX61_ACC | KMX61_MAG);
+			if (ret < 0)
+				return ret;
+
+			ret = kmx61_set_mode(data, KMX61_ALL_STBY,
+					     KMX61_ACC | KMX61_MAG, true);
+			if (ret < 0)
+				return ret;
+
+			ret = kmx61_set_range(data, i);
+			if (ret < 0)
+				return ret;
+
+			return  kmx61_set_mode(data, mode,
+					       KMX61_ACC | KMX61_MAG, true);
+		}
+	}
+	return -EINVAL;
+}
+
+static int kmx61_chip_init(struct kmx61_data *data)
+{
+	int ret, val, val2;
+
+	ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_WHO_AM_I);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading who_am_i\n");
+		return ret;
+	}
+
+	if (ret != KMX61_CHIP_ID) {
+		dev_err(&data->client->dev,
+			"Wrong chip id, got %x expected %x\n",
+			 ret, KMX61_CHIP_ID);
+		return -EINVAL;
+	}
+
+	/* set accel 12bit, 4g range */
+	ret = kmx61_set_range(data, KMX61_RANGE_4G);
+	if (ret < 0)
+		return ret;
+
+	ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_ODCNTL);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_odcntl\n");
+		return ret;
+	}
+	data->odr_bits = ret;
+
+	/*
+	 * set output data rate for wake up (motion detection) function
+	 * to match data rate for accelerometer sampling
+	 */
+	ret = kmx61_get_odr(data, &val, &val2, KMX61_ACC);
+	if (ret < 0)
+		return ret;
+
+	ret = kmx61_set_wake_up_odr(data, val, val2);
+	if (ret < 0)
+		return ret;
+
+	/* set acc/magn to OPERATION mode */
+	ret = kmx61_set_mode(data, 0, KMX61_ACC | KMX61_MAG, true);
+	if (ret < 0)
+		return ret;
+
+	data->wake_thresh = KMX61_DEFAULT_WAKE_THRESH;
+	data->wake_duration = KMX61_DEFAULT_WAKE_DURATION;
+
+	return 0;
+}
+
+static int kmx61_setup_new_data_interrupt(struct kmx61_data *data,
+					  bool status, u8 device)
+{
+	u8 mode;
+	int ret;
+
+	ret = kmx61_get_mode(data, &mode, KMX61_ACC | KMX61_MAG);
+	if (ret < 0)
+		return ret;
+
+	ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true);
+	if (ret < 0)
+		return ret;
+
+	ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INC1);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
+		return ret;
+	}
+
+	if (status) {
+		ret |= KMX61_REG_INC1_BIT_IEN;
+		if (device & KMX61_ACC)
+			ret |= KMX61_REG_INC1_BIT_DRDYA;
+		if (device & KMX61_MAG)
+			ret |=  KMX61_REG_INC1_BIT_DRDYM;
+	} else {
+		ret &= ~KMX61_REG_INC1_BIT_IEN;
+		if (device & KMX61_ACC)
+			ret &= ~KMX61_REG_INC1_BIT_DRDYA;
+		if (device & KMX61_MAG)
+			ret &= ~KMX61_REG_INC1_BIT_DRDYM;
+	}
+	ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_INC1, 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, KMX61_REG_CTRL1);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
+		return ret;
+	}
+
+	if (status)
+		ret |= KMX61_REG_CTRL1_BIT_DRDYE;
+	else
+		ret &= ~KMX61_REG_CTRL1_BIT_DRDYE;
+
+	ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
+		return ret;
+	}
+
+	return kmx61_set_mode(data, mode, KMX61_ACC | KMX61_MAG, true);
+}
+
+static int kmx61_chip_update_thresholds(struct kmx61_data *data)
+{
+	int ret;
+
+	ret = i2c_smbus_write_byte_data(data->client,
+					KMX61_REG_WUF_TIMER,
+					data->wake_duration);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Errow writing reg_wuf_timer\n");
+		return ret;
+	}
+
+	ret = i2c_smbus_write_byte_data(data->client,
+					KMX61_REG_WUF_THRESH,
+					data->wake_thresh);
+	if (ret < 0)
+		dev_err(&data->client->dev, "Error writing reg_wuf_thresh\n");
+
+	return ret;
+}
+
+static int kmx61_setup_any_motion_interrupt(struct kmx61_data *data,
+					    bool status)
+{
+	u8 mode;
+	int ret;
+
+	ret = kmx61_get_mode(data, &mode, KMX61_ACC | KMX61_MAG);
+	if (ret < 0)
+		return ret;
+
+	ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true);
+	if (ret < 0)
+		return ret;
+
+	ret = kmx61_chip_update_thresholds(data);
+	if (ret < 0)
+		return ret;
+
+	ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INC1);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_inc1\n");
+		return ret;
+	}
+	if (status)
+		ret |= (KMX61_REG_INC1_BIT_IEN | KMX61_REG_INC1_BIT_WUFS);
+	else
+		ret &= ~(KMX61_REG_INC1_BIT_IEN | KMX61_REG_INC1_BIT_WUFS);
+
+	ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_INC1, ret);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error writing reg_inc1\n");
+		return ret;
+	}
+
+	ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
+		return ret;
+	}
+
+	if (status)
+		ret |= KMX61_REG_CTRL1_BIT_WUFE | KMX61_REG_CTRL1_BIT_BTSE;
+	else
+		ret &= ~(KMX61_REG_CTRL1_BIT_WUFE | KMX61_REG_CTRL1_BIT_BTSE);
+
+	ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
+		return ret;
+	}
+	mode |= KMX61_ACT_STBY_BIT;
+	return kmx61_set_mode(data, mode, KMX61_ACC | KMX61_MAG, true);
+}
+
+/**
+ * kmx61_set_power_state() - set power state for kmx61 @device
+ * @data - kmx61 device private pointer
+ * @on - power state to be set for @device
+ * @device - bitmask indicating device for which @on state needs to be set
+ *
+ * Notice that when ACC power state needs to be set to ON and MAG is in
+ * OPERATION then we know that kmx61_runtime_resume was already called
+ * so we must set ACC OPERATION mode here. The same happens when MAG power
+ * state needs to be set to ON and ACC is in OPERATION.
+ */
+static int kmx61_set_power_state(struct kmx61_data *data, bool on, u8 device)
+{
+#ifdef CONFIG_PM
+	int ret;
+
+	if (device & KMX61_ACC) {
+		if (on && !data->acc_ps && !data->mag_stby) {
+			ret = kmx61_set_mode(data, 0, KMX61_ACC, true);
+			if (ret < 0)
+				return ret;
+		}
+		data->acc_ps = on;
+	}
+	if (device & KMX61_MAG) {
+		if (on && !data->mag_ps && !data->acc_stby) {
+			ret = kmx61_set_mode(data, 0, KMX61_MAG, true);
+			if (ret < 0)
+				return ret;
+		}
+		data->mag_ps = on;
+	}
+
+	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: kmx61_set_power_state for %d, ret %d\n",
+			on, ret);
+		if (on)
+			pm_runtime_put_noidle(&data->client->dev);
+
+		return ret;
+	}
+#endif
+	return 0;
+}
+
+static int kmx61_read_measurement(struct kmx61_data *data, u8 base, u8 offset)
+{
+	int ret;
+	u8 reg = base + offset * 2;
+
+	ret = i2c_smbus_read_word_data(data->client, reg);
+	if (ret < 0)
+		dev_err(&data->client->dev, "failed to read reg at %x\n", reg);
+
+	return ret;
+}
+
+static int kmx61_read_raw(struct iio_dev *indio_dev,
+			  struct iio_chan_spec const *chan, int *val,
+			  int *val2, long mask)
+{
+	int ret;
+	u8 base_reg;
+	struct kmx61_data *data = kmx61_get_data(indio_dev);
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		switch (chan->type) {
+		case IIO_ACCEL:
+			base_reg = KMX61_ACC_XOUT_L;
+			break;
+		case IIO_MAGN:
+			base_reg = KMX61_MAG_XOUT_L;
+			break;
+		default:
+			return -EINVAL;
+		}
+		mutex_lock(&data->lock);
+
+		ret = kmx61_set_power_state(data, true, chan->address);
+		if (ret) {
+			mutex_unlock(&data->lock);
+			return ret;
+		}
+
+		ret = kmx61_read_measurement(data, base_reg, chan->scan_index);
+		if (ret < 0) {
+			kmx61_set_power_state(data, false, chan->address);
+			mutex_unlock(&data->lock);
+			return ret;
+		}
+		*val = sign_extend32(ret >> chan->scan_type.shift,
+				     chan->scan_type.realbits - 1);
+		ret = kmx61_set_power_state(data, false, chan->address);
+
+		mutex_unlock(&data->lock);
+		if (ret)
+			return ret;
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		switch (chan->type) {
+		case IIO_ACCEL:
+			*val = 0;
+			*val2 = kmx61_uscale_table[data->range];
+			return IIO_VAL_INT_PLUS_MICRO;
+		case IIO_MAGN:
+			/* 14 bits res, 1465 microGauss per magn count */
+			*val = 0;
+			*val2 = 1465;
+			return IIO_VAL_INT_PLUS_MICRO;
+		default:
+			return -EINVAL;
+		}
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		if (chan->type != IIO_ACCEL && chan->type != IIO_MAGN)
+			return -EINVAL;
+
+		mutex_lock(&data->lock);
+		ret = kmx61_get_odr(data, val, val2, chan->address);
+		mutex_unlock(&data->lock);
+		if (ret)
+			return -EINVAL;
+		return IIO_VAL_INT_PLUS_MICRO;
+	}
+	return -EINVAL;
+}
+
+static int kmx61_write_raw(struct iio_dev *indio_dev,
+			   struct iio_chan_spec const *chan, int val,
+			   int val2, long mask)
+{
+	int ret;
+	struct kmx61_data *data = kmx61_get_data(indio_dev);
+
+	switch (mask) {
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		if (chan->type != IIO_ACCEL && chan->type != IIO_MAGN)
+			return -EINVAL;
+
+		mutex_lock(&data->lock);
+		ret = kmx61_set_odr(data, val, val2, chan->address);
+		mutex_unlock(&data->lock);
+		return ret;
+	case IIO_CHAN_INFO_SCALE:
+		switch (chan->type) {
+		case IIO_ACCEL:
+			if (val != 0)
+				return -EINVAL;
+			mutex_lock(&data->lock);
+			ret = kmx61_set_scale(data, val2);
+			mutex_unlock(&data->lock);
+			return ret;
+		default:
+			return -EINVAL;
+		}
+	default:
+		return -EINVAL;
+	}
+}
+
+static int kmx61_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 kmx61_data *data = kmx61_get_data(indio_dev);
+
+	*val2 = 0;
+	switch (info) {
+	case IIO_EV_INFO_VALUE:
+		*val = data->wake_thresh;
+		return IIO_VAL_INT;
+	case IIO_EV_INFO_PERIOD:
+		*val = data->wake_duration;
+		return IIO_VAL_INT;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int kmx61_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 kmx61_data *data = kmx61_get_data(indio_dev);
+
+	if (data->ev_enable_state)
+		return -EBUSY;
+
+	switch (info) {
+	case IIO_EV_INFO_VALUE:
+		data->wake_thresh = val;
+		return IIO_VAL_INT;
+	case IIO_EV_INFO_PERIOD:
+		data->wake_duration = val;
+		return IIO_VAL_INT;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int kmx61_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 kmx61_data *data = kmx61_get_data(indio_dev);
+
+	return data->ev_enable_state;
+}
+
+static int kmx61_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 kmx61_data *data = kmx61_get_data(indio_dev);
+	int ret = 0;
+
+	if (state && data->ev_enable_state)
+		return 0;
+
+	mutex_lock(&data->lock);
+
+	if (!state && data->motion_trig_on) {
+		data->ev_enable_state = false;
+		goto err_unlock;
+	}
+
+	ret = kmx61_set_power_state(data, state, KMX61_ACC);
+	if (ret < 0)
+		goto err_unlock;
+
+	ret = kmx61_setup_any_motion_interrupt(data, state);
+	if (ret < 0) {
+		kmx61_set_power_state(data, false, KMX61_ACC);
+		goto err_unlock;
+	}
+
+	data->ev_enable_state = state;
+
+err_unlock:
+	mutex_unlock(&data->lock);
+
+	return ret;
+}
+
+static int kmx61_acc_validate_trigger(struct iio_dev *indio_dev,
+				      struct iio_trigger *trig)
+{
+	struct kmx61_data *data = kmx61_get_data(indio_dev);
+
+	if (data->acc_dready_trig != trig && data->motion_trig != trig)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int kmx61_mag_validate_trigger(struct iio_dev *indio_dev,
+				      struct iio_trigger *trig)
+{
+	struct kmx61_data *data = kmx61_get_data(indio_dev);
+
+	if (data->mag_dready_trig != trig)
+		return -EINVAL;
+
+	return 0;
+}
+
+static const struct iio_info kmx61_acc_info = {
+	.driver_module		= THIS_MODULE,
+	.read_raw		= kmx61_read_raw,
+	.write_raw		= kmx61_write_raw,
+	.attrs			= &kmx61_acc_attribute_group,
+	.read_event_value	= kmx61_read_event,
+	.write_event_value	= kmx61_write_event,
+	.read_event_config	= kmx61_read_event_config,
+	.write_event_config	= kmx61_write_event_config,
+	.validate_trigger	= kmx61_acc_validate_trigger,
+};
+
+static const struct iio_info kmx61_mag_info = {
+	.driver_module		= THIS_MODULE,
+	.read_raw		= kmx61_read_raw,
+	.write_raw		= kmx61_write_raw,
+	.attrs			= &kmx61_mag_attribute_group,
+	.validate_trigger	= kmx61_mag_validate_trigger,
+};
+
+
+static int kmx61_data_rdy_trigger_set_state(struct iio_trigger *trig,
+					    bool state)
+{
+	int ret = 0;
+	u8 device;
+
+	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+	struct kmx61_data *data = kmx61_get_data(indio_dev);
+
+	mutex_lock(&data->lock);
+
+	if (!state && data->ev_enable_state && data->motion_trig_on) {
+		data->motion_trig_on = false;
+		goto err_unlock;
+	}
+
+	if (data->acc_dready_trig == trig || data->motion_trig == trig)
+		device = KMX61_ACC;
+	else
+		device = KMX61_MAG;
+
+	ret = kmx61_set_power_state(data, state, device);
+	if (ret < 0)
+		goto err_unlock;
+
+	if (data->acc_dready_trig == trig || data->mag_dready_trig == trig)
+		ret = kmx61_setup_new_data_interrupt(data, state, device);
+	else
+		ret = kmx61_setup_any_motion_interrupt(data, state);
+	if (ret < 0) {
+		kmx61_set_power_state(data, false, device);
+		goto err_unlock;
+	}
+
+	if (data->acc_dready_trig == trig)
+		data->acc_dready_trig_on = state;
+	else if (data->mag_dready_trig == trig)
+		data->mag_dready_trig_on = state;
+	else
+		data->motion_trig_on = state;
+err_unlock:
+	mutex_unlock(&data->lock);
+
+	return ret;
+}
+
+static int kmx61_trig_try_reenable(struct iio_trigger *trig)
+{
+	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+	struct kmx61_data *data = kmx61_get_data(indio_dev);
+	int ret;
+
+	ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INL);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_inl\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static const struct iio_trigger_ops kmx61_trigger_ops = {
+	.set_trigger_state = kmx61_data_rdy_trigger_set_state,
+	.try_reenable = kmx61_trig_try_reenable,
+	.owner = THIS_MODULE,
+};
+
+static irqreturn_t kmx61_event_handler(int irq, void *private)
+{
+	struct kmx61_data *data = private;
+	struct iio_dev *indio_dev = data->acc_indio_dev;
+	int ret;
+
+	ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INS1);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "Error reading reg_ins1\n");
+		goto ack_intr;
+	}
+
+	if (ret & KMX61_REG_INS1_BIT_WUFS) {
+		ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INS2);
+		if (ret < 0) {
+			dev_err(&data->client->dev, "Error reading reg_ins2\n");
+			goto ack_intr;
+		}
+
+		if (ret & KMX61_REG_INS2_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),
+				       0);
+
+		if (ret & KMX61_REG_INS2_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),
+				       0);
+
+		if (ret & KMX61_REG_INS2_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),
+				       0);
+
+		if (ret & KMX61_REG_INS2_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),
+				       0);
+
+		if (ret & KMX61_REG_INS2_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),
+				       0);
+
+		if (ret & KMX61_REG_INS2_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),
+				       0);
+	}
+
+ack_intr:
+	ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1);
+	if (ret < 0)
+		dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
+
+	ret |= KMX61_REG_CTRL1_BIT_RES;
+	ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret);
+	if (ret < 0)
+		dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
+
+	ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INL);
+	if (ret < 0)
+		dev_err(&data->client->dev, "Error reading reg_inl\n");
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t kmx61_data_rdy_trig_poll(int irq, void *private)
+{
+	struct kmx61_data *data = private;
+
+	if (data->acc_dready_trig_on)
+		iio_trigger_poll(data->acc_dready_trig);
+	if (data->mag_dready_trig_on)
+		iio_trigger_poll(data->mag_dready_trig);
+
+	if (data->motion_trig_on)
+		iio_trigger_poll(data->motion_trig);
+
+	if (data->ev_enable_state)
+		return IRQ_WAKE_THREAD;
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t kmx61_trigger_handler(int irq, void *p)
+{
+	struct iio_poll_func *pf = p;
+	struct iio_dev *indio_dev = pf->indio_dev;
+	struct kmx61_data *data = kmx61_get_data(indio_dev);
+	int bit, ret, i = 0;
+	u8 base;
+	s16 buffer[8];
+
+	if (indio_dev == data->acc_indio_dev)
+		base = KMX61_ACC_XOUT_L;
+	else
+		base = KMX61_MAG_XOUT_L;
+
+	mutex_lock(&data->lock);
+	for_each_set_bit(bit, indio_dev->active_scan_mask,
+			 indio_dev->masklength) {
+		ret = kmx61_read_measurement(data, base, bit);
+		if (ret < 0) {
+			mutex_unlock(&data->lock);
+			goto err;
+		}
+		buffer[i++] = ret;
+	}
+	mutex_unlock(&data->lock);
+
+	iio_push_to_buffers(indio_dev, buffer);
+err:
+	iio_trigger_notify_done(indio_dev->trig);
+
+	return IRQ_HANDLED;
+}
+
+static const char *kmx61_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 kmx61_gpio_probe(struct i2c_client *client, struct kmx61_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, KMX61_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 struct iio_dev *kmx61_indiodev_setup(struct kmx61_data *data,
+					    const struct iio_info *info,
+					    const struct iio_chan_spec *chan,
+					    int num_channels,
+					    const char *name)
+{
+	struct iio_dev *indio_dev;
+
+	indio_dev = devm_iio_device_alloc(&data->client->dev, sizeof(data));
+	if (!indio_dev)
+		return ERR_PTR(-ENOMEM);
+
+	kmx61_set_data(indio_dev, data);
+
+	indio_dev->dev.parent = &data->client->dev;
+	indio_dev->channels = chan;
+	indio_dev->num_channels = num_channels;
+	indio_dev->name = name;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->info = info;
+
+	return indio_dev;
+}
+
+static struct iio_trigger *kmx61_trigger_setup(struct kmx61_data *data,
+					       struct iio_dev *indio_dev,
+					       const char *tag)
+{
+	struct iio_trigger *trig;
+	int ret;
+
+	trig = devm_iio_trigger_alloc(&data->client->dev,
+				      "%s-%s-dev%d",
+				      indio_dev->name,
+				      tag,
+				      indio_dev->id);
+	if (!trig)
+		return ERR_PTR(-ENOMEM);
+
+	trig->dev.parent = &data->client->dev;
+	trig->ops = &kmx61_trigger_ops;
+	iio_trigger_set_drvdata(trig, indio_dev);
+
+	ret = iio_trigger_register(trig);
+	if (ret)
+		return ERR_PTR(ret);
+
+	return trig;
+}
+
+static int kmx61_probe(struct i2c_client *client,
+		       const struct i2c_device_id *id)
+{
+	int ret;
+	struct kmx61_data *data;
+	const char *name = NULL;
+
+	data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	i2c_set_clientdata(client, data);
+	data->client = client;
+
+	mutex_init(&data->lock);
+
+	if (id)
+		name = id->name;
+	else if (ACPI_HANDLE(&client->dev))
+		name = kmx61_match_acpi_device(&client->dev);
+	else
+		return -ENODEV;
+
+	data->acc_indio_dev =
+		kmx61_indiodev_setup(data, &kmx61_acc_info,
+				     kmx61_acc_channels,
+				     ARRAY_SIZE(kmx61_acc_channels),
+				     name);
+	if (IS_ERR(data->acc_indio_dev))
+		return PTR_ERR(data->acc_indio_dev);
+
+	data->mag_indio_dev =
+		kmx61_indiodev_setup(data, &kmx61_mag_info,
+				     kmx61_mag_channels,
+				     ARRAY_SIZE(kmx61_mag_channels),
+				     name);
+	if (IS_ERR(data->mag_indio_dev))
+		return PTR_ERR(data->mag_indio_dev);
+
+	ret = kmx61_chip_init(data);
+	if (ret < 0)
+		return ret;
+
+	if (client->irq < 0)
+		client->irq = kmx61_gpio_probe(client, data);
+
+	if (client->irq >= 0) {
+		ret = devm_request_threaded_irq(&client->dev, client->irq,
+						kmx61_data_rdy_trig_poll,
+						kmx61_event_handler,
+						IRQF_TRIGGER_RISING,
+						KMX61_IRQ_NAME,
+						data);
+		if (ret)
+			goto err_chip_uninit;
+
+		data->acc_dready_trig =
+			kmx61_trigger_setup(data, data->acc_indio_dev,
+					    "dready");
+		if (IS_ERR(data->acc_dready_trig)) {
+			ret = PTR_ERR(data->acc_dready_trig);
+			goto err_chip_uninit;
+		}
+
+		data->mag_dready_trig =
+			kmx61_trigger_setup(data, data->mag_indio_dev,
+					    "dready");
+		if (IS_ERR(data->mag_dready_trig)) {
+			ret = PTR_ERR(data->mag_dready_trig);
+			goto err_trigger_unregister_acc_dready;
+		}
+
+		data->motion_trig =
+			kmx61_trigger_setup(data, data->acc_indio_dev,
+					    "any-motion");
+		if (IS_ERR(data->motion_trig)) {
+			ret = PTR_ERR(data->motion_trig);
+			goto err_trigger_unregister_mag_dready;
+		}
+
+		ret = iio_triggered_buffer_setup(data->acc_indio_dev,
+						 &iio_pollfunc_store_time,
+						 kmx61_trigger_handler,
+						 NULL);
+		if (ret < 0) {
+			dev_err(&data->client->dev,
+				"Failed to setup acc triggered buffer\n");
+			goto err_trigger_unregister_motion;
+		}
+
+		ret = iio_triggered_buffer_setup(data->mag_indio_dev,
+						 &iio_pollfunc_store_time,
+						 kmx61_trigger_handler,
+						 NULL);
+		if (ret < 0) {
+			dev_err(&data->client->dev,
+				"Failed to setup mag triggered buffer\n");
+			goto err_buffer_cleanup_acc;
+		}
+	}
+
+	ret = iio_device_register(data->acc_indio_dev);
+	if (ret < 0) {
+		dev_err(&client->dev, "Failed to register acc iio device\n");
+		goto err_buffer_cleanup_mag;
+	}
+
+	ret = iio_device_register(data->mag_indio_dev);
+	if (ret < 0) {
+		dev_err(&client->dev, "Failed to register mag iio device\n");
+		goto err_iio_unregister_acc;
+	}
+
+	ret = pm_runtime_set_active(&client->dev);
+	if (ret < 0)
+		goto err_iio_unregister_mag;
+
+	pm_runtime_enable(&client->dev);
+	pm_runtime_set_autosuspend_delay(&client->dev, KMX61_SLEEP_DELAY_MS);
+	pm_runtime_use_autosuspend(&client->dev);
+
+	return 0;
+
+err_iio_unregister_mag:
+	iio_device_unregister(data->mag_indio_dev);
+err_iio_unregister_acc:
+	iio_device_unregister(data->acc_indio_dev);
+err_buffer_cleanup_mag:
+	if (client->irq >= 0)
+		iio_triggered_buffer_cleanup(data->mag_indio_dev);
+err_buffer_cleanup_acc:
+	if (client->irq >= 0)
+		iio_triggered_buffer_cleanup(data->acc_indio_dev);
+err_trigger_unregister_motion:
+	iio_trigger_unregister(data->motion_trig);
+err_trigger_unregister_mag_dready:
+	iio_trigger_unregister(data->mag_dready_trig);
+err_trigger_unregister_acc_dready:
+	iio_trigger_unregister(data->acc_dready_trig);
+err_chip_uninit:
+	kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true);
+	return ret;
+}
+
+static int kmx61_remove(struct i2c_client *client)
+{
+	struct kmx61_data *data = i2c_get_clientdata(client);
+
+	pm_runtime_disable(&client->dev);
+	pm_runtime_set_suspended(&client->dev);
+	pm_runtime_put_noidle(&client->dev);
+
+	iio_device_unregister(data->acc_indio_dev);
+	iio_device_unregister(data->mag_indio_dev);
+
+	if (client->irq >= 0) {
+		iio_triggered_buffer_cleanup(data->acc_indio_dev);
+		iio_triggered_buffer_cleanup(data->mag_indio_dev);
+		iio_trigger_unregister(data->acc_dready_trig);
+		iio_trigger_unregister(data->mag_dready_trig);
+		iio_trigger_unregister(data->motion_trig);
+	}
+
+	mutex_lock(&data->lock);
+	kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true);
+	mutex_unlock(&data->lock);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int kmx61_suspend(struct device *dev)
+{
+	int ret;
+	struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev));
+
+	mutex_lock(&data->lock);
+	ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG,
+			     false);
+	mutex_unlock(&data->lock);
+
+	return ret;
+}
+
+static int kmx61_resume(struct device *dev)
+{
+	u8 stby = 0;
+	struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev));
+
+	if (data->acc_stby)
+		stby |= KMX61_ACC_STBY_BIT;
+	if (data->mag_stby)
+		stby |= KMX61_MAG_STBY_BIT;
+
+	return kmx61_set_mode(data, stby, KMX61_ACC | KMX61_MAG, true);
+}
+#endif
+
+#ifdef CONFIG_PM
+static int kmx61_runtime_suspend(struct device *dev)
+{
+	struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev));
+	int ret;
+
+	mutex_lock(&data->lock);
+	ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true);
+	mutex_unlock(&data->lock);
+
+	return ret;
+}
+
+static int kmx61_runtime_resume(struct device *dev)
+{
+	struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev));
+	u8 stby = 0;
+
+	if (!data->acc_ps)
+		stby |= KMX61_ACC_STBY_BIT;
+	if (!data->mag_ps)
+		stby |= KMX61_MAG_STBY_BIT;
+
+	return kmx61_set_mode(data, stby, KMX61_ACC | KMX61_MAG, true);
+}
+#endif
+
+static const struct dev_pm_ops kmx61_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(kmx61_suspend, kmx61_resume)
+	SET_RUNTIME_PM_OPS(kmx61_runtime_suspend, kmx61_runtime_resume, NULL)
+};
+
+static const struct acpi_device_id kmx61_acpi_match[] = {
+	{"KMX61021", 0},
+	{}
+};
+
+MODULE_DEVICE_TABLE(acpi, kmx61_acpi_match);
+
+static const struct i2c_device_id kmx61_id[] = {
+	{"kmx611021", 0},
+	{}
+};
+
+MODULE_DEVICE_TABLE(i2c, kmx61_id);
+
+static struct i2c_driver kmx61_driver = {
+	.driver = {
+		.name = KMX61_DRV_NAME,
+		.acpi_match_table = ACPI_PTR(kmx61_acpi_match),
+		.pm = &kmx61_pm_ops,
+	},
+	.probe		= kmx61_probe,
+	.remove		= kmx61_remove,
+	.id_table	= kmx61_id,
+};
+
+module_i2c_driver(kmx61_driver);
+
+MODULE_AUTHOR("Daniel Baluta <daniel.baluta@intel.com>");
+MODULE_DESCRIPTION("KMX61 accelerometer/magnetometer driver");
+MODULE_LICENSE("GPL v2");