Linux-libre 4.4-gnupck-4.4-gnu

7 files changed, 1716 insertions, 55 deletions

diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
index 7ed859a70..cfd3df841 100644
--- a/drivers/iio/light/Kconfig
+++ b/drivers/iio/light/Kconfig
@@ -50,6 +50,19 @@ config APDS9300
 	 To compile this driver as a module, choose M here: the
 	 module will be called apds9300.
 
+config APDS9960
+	tristate "Avago APDS9960 gesture/RGB/ALS/proximity sensor"
+	select REGMAP_I2C
+	select IIO_BUFFER
+	select IIO_KFIFO_BUF
+	depends on I2C
+	help
+	  Say Y here to build I2C interface support for the Avago
+	  APDS9960 gesture/RGB/ALS/proximity sensor.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called apds9960
+
 config BH1750
 	tristate "ROHM BH1750 ambient light sensor"
 	depends on I2C
@@ -287,6 +300,16 @@ config TSL4531
 	 To compile this driver as a module, choose M here: the
 	 module will be called tsl4531.
 
+config US5182D
+	tristate "UPISEMI light and proximity sensor"
+	depends on I2C
+	help
+	 If you say yes here you get support for the UPISEMI US5182D
+	 ambient light and proximity sensor.
+
+	 This driver can also be built as a module.  If so, the module
+	 will be called us5182d.
+
 config VCNL4000
 	tristate "VCNL4000 combined ALS and proximity sensor"
 	depends on I2C
diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile
index 91c74c014..b2c31053d 100644
--- a/drivers/iio/light/Makefile
+++ b/drivers/iio/light/Makefile
@@ -7,6 +7,7 @@ obj-$(CONFIG_ACPI_ALS)		+= acpi-als.o
 obj-$(CONFIG_ADJD_S311)		+= adjd_s311.o
 obj-$(CONFIG_AL3320A)		+= al3320a.o
 obj-$(CONFIG_APDS9300)		+= apds9300.o
+obj-$(CONFIG_APDS9960)		+= apds9960.o
 obj-$(CONFIG_BH1750)		+= bh1750.o
 obj-$(CONFIG_CM32181)		+= cm32181.o
 obj-$(CONFIG_CM3232)		+= cm3232.o
@@ -27,4 +28,5 @@ obj-$(CONFIG_STK3310)          += stk3310.o
 obj-$(CONFIG_TCS3414)		+= tcs3414.o
 obj-$(CONFIG_TCS3472)		+= tcs3472.o
 obj-$(CONFIG_TSL4531)		+= tsl4531.o
+obj-$(CONFIG_US5182D)		+= us5182d.o
 obj-$(CONFIG_VCNL4000)		+= vcnl4000.o
diff --git a/drivers/iio/light/apds9960.c b/drivers/iio/light/apds9960.c
new file mode 100644
index 000000000..f6a07dc32
--- /dev/null
+++ b/drivers/iio/light/apds9960.c
@@ -0,0 +1,1131 @@
+/*
+ * apds9960.c - Support for Avago APDS9960 gesture/RGB/ALS/proximity sensor
+ *
+ * Copyright (C) 2015 Matt Ranostay <mranostay@gmail.com>
+ *
+ * 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.
+ *
+ * TODO: gesture + proximity calib offsets
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/mutex.h>
+#include <linux/err.h>
+#include <linux/irq.h>
+#include <linux/gpio.h>
+#include <linux/i2c.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/events.h>
+#include <linux/iio/kfifo_buf.h>
+#include <linux/iio/sysfs.h>
+#include <linux/of_gpio.h>
+
+#define APDS9960_REGMAP_NAME	"apds9960_regmap"
+#define APDS9960_DRV_NAME	"apds9960"
+
+#define APDS9960_REG_RAM_START	0x00
+#define APDS9960_REG_RAM_END	0x7f
+
+#define APDS9960_REG_ENABLE	0x80
+#define APDS9960_REG_ATIME	0x81
+#define APDS9960_REG_WTIME	0x83
+
+#define APDS9960_REG_AILTL	0x84
+#define APDS9960_REG_AILTH	0x85
+#define APDS9960_REG_AIHTL	0x86
+#define APDS9960_REG_AIHTH	0x87
+
+#define APDS9960_REG_PILT	0x89
+#define APDS9960_REG_PIHT	0x8b
+#define APDS9960_REG_PERS	0x8c
+
+#define APDS9960_REG_CONFIG_1	0x8d
+#define APDS9960_REG_PPULSE	0x8e
+
+#define APDS9960_REG_CONTROL	0x8f
+#define APDS9960_REG_CONTROL_AGAIN_MASK		0x03
+#define APDS9960_REG_CONTROL_PGAIN_MASK		0x0c
+#define APDS9960_REG_CONTROL_AGAIN_MASK_SHIFT	0
+#define APDS9960_REG_CONTROL_PGAIN_MASK_SHIFT	2
+
+#define APDS9960_REG_CONFIG_2	0x90
+#define APDS9960_REG_CONFIG_2_GGAIN_MASK	0x60
+#define APDS9960_REG_CONFIG_2_GGAIN_MASK_SHIFT	5
+
+#define APDS9960_REG_ID		0x92
+
+#define APDS9960_REG_STATUS	0x93
+#define APDS9960_REG_STATUS_PS_INT	BIT(5)
+#define APDS9960_REG_STATUS_ALS_INT	BIT(4)
+#define APDS9960_REG_STATUS_GINT	BIT(2)
+
+#define APDS9960_REG_PDATA	0x9c
+#define APDS9960_REG_POFFSET_UR	0x9d
+#define APDS9960_REG_POFFSET_DL 0x9e
+#define APDS9960_REG_CONFIG_3	0x9f
+
+#define APDS9960_REG_GPENTH	0xa0
+#define APDS9960_REG_GEXTH	0xa1
+
+#define APDS9960_REG_GCONF_1	0xa2
+#define APDS9960_REG_GCONF_1_GFIFO_THRES_MASK		0xc0
+#define APDS9960_REG_GCONF_1_GFIFO_THRES_MASK_SHIFT	6
+
+#define APDS9960_REG_GCONF_2	0xa3
+#define APDS9960_REG_GOFFSET_U	0xa4
+#define APDS9960_REG_GOFFSET_D	0xa5
+#define APDS9960_REG_GPULSE	0xa6
+#define APDS9960_REG_GOFFSET_L	0xa7
+#define APDS9960_REG_GOFFSET_R	0xa9
+#define APDS9960_REG_GCONF_3	0xaa
+
+#define APDS9960_REG_GCONF_4	0xab
+#define APDS9960_REG_GFLVL	0xae
+#define APDS9960_REG_GSTATUS	0xaf
+
+#define APDS9960_REG_IFORCE	0xe4
+#define APDS9960_REG_PICLEAR	0xe5
+#define APDS9960_REG_CICLEAR	0xe6
+#define APDS9960_REG_AICLEAR	0xe7
+
+#define APDS9960_DEFAULT_PERS	0x33
+#define APDS9960_DEFAULT_GPENTH	0x50
+#define APDS9960_DEFAULT_GEXTH	0x40
+
+#define APDS9960_MAX_PXS_THRES_VAL	255
+#define APDS9960_MAX_ALS_THRES_VAL	0xffff
+#define APDS9960_MAX_INT_TIME_IN_US	1000000
+
+enum apds9960_als_channel_idx {
+	IDX_ALS_CLEAR, IDX_ALS_RED, IDX_ALS_GREEN, IDX_ALS_BLUE,
+};
+
+#define APDS9960_REG_ALS_BASE	0x94
+#define APDS9960_REG_ALS_CHANNEL(_colour) \
+	(APDS9960_REG_ALS_BASE + (IDX_ALS_##_colour * 2))
+
+enum apds9960_gesture_channel_idx {
+	IDX_DIR_UP, IDX_DIR_DOWN, IDX_DIR_LEFT, IDX_DIR_RIGHT,
+};
+
+#define APDS9960_REG_GFIFO_BASE	0xfc
+#define APDS9960_REG_GFIFO_DIR(_dir) \
+	(APDS9960_REG_GFIFO_BASE + IDX_DIR_##_dir)
+
+struct apds9960_data {
+	struct i2c_client *client;
+	struct iio_dev *indio_dev;
+	struct mutex lock;
+
+	/* regmap fields */
+	struct regmap *regmap;
+	struct regmap_field *reg_int_als;
+	struct regmap_field *reg_int_ges;
+	struct regmap_field *reg_int_pxs;
+
+	struct regmap_field *reg_enable_als;
+	struct regmap_field *reg_enable_ges;
+	struct regmap_field *reg_enable_pxs;
+
+	/* state */
+	int als_int;
+	int pxs_int;
+	int gesture_mode_running;
+
+	/* gain values */
+	int als_gain;
+	int pxs_gain;
+
+	/* integration time value in us */
+	int als_adc_int_us;
+
+	/* gesture buffer */
+	u8 buffer[4]; /* 4 8-bit channels */
+};
+
+static const struct reg_default apds9960_reg_defaults[] = {
+	/* Default ALS integration time = 2.48ms */
+	{ APDS9960_REG_ATIME, 0xff },
+};
+
+static const struct regmap_range apds9960_volatile_ranges[] = {
+	regmap_reg_range(APDS9960_REG_STATUS,
+				APDS9960_REG_PDATA),
+	regmap_reg_range(APDS9960_REG_GFLVL,
+				APDS9960_REG_GSTATUS),
+	regmap_reg_range(APDS9960_REG_GFIFO_DIR(UP),
+				APDS9960_REG_GFIFO_DIR(RIGHT)),
+	regmap_reg_range(APDS9960_REG_IFORCE,
+				APDS9960_REG_AICLEAR),
+};
+
+static const struct regmap_access_table apds9960_volatile_table = {
+	.yes_ranges	= apds9960_volatile_ranges,
+	.n_yes_ranges	= ARRAY_SIZE(apds9960_volatile_ranges),
+};
+
+static const struct regmap_range apds9960_precious_ranges[] = {
+	regmap_reg_range(APDS9960_REG_RAM_START, APDS9960_REG_RAM_END),
+};
+
+static const struct regmap_access_table apds9960_precious_table = {
+	.yes_ranges	= apds9960_precious_ranges,
+	.n_yes_ranges	= ARRAY_SIZE(apds9960_precious_ranges),
+};
+
+static const struct regmap_range apds9960_readable_ranges[] = {
+	regmap_reg_range(APDS9960_REG_ENABLE,
+				APDS9960_REG_GSTATUS),
+	regmap_reg_range(APDS9960_REG_GFIFO_DIR(UP),
+				APDS9960_REG_GFIFO_DIR(RIGHT)),
+};
+
+static const struct regmap_access_table apds9960_readable_table = {
+	.yes_ranges	= apds9960_readable_ranges,
+	.n_yes_ranges	= ARRAY_SIZE(apds9960_readable_ranges),
+};
+
+static const struct regmap_range apds9960_writeable_ranges[] = {
+	regmap_reg_range(APDS9960_REG_ENABLE, APDS9960_REG_CONFIG_2),
+	regmap_reg_range(APDS9960_REG_POFFSET_UR, APDS9960_REG_GCONF_4),
+	regmap_reg_range(APDS9960_REG_IFORCE, APDS9960_REG_AICLEAR),
+};
+
+static const struct regmap_access_table apds9960_writeable_table = {
+	.yes_ranges	= apds9960_writeable_ranges,
+	.n_yes_ranges	= ARRAY_SIZE(apds9960_writeable_ranges),
+};
+
+static const struct regmap_config apds9960_regmap_config = {
+	.name = APDS9960_REGMAP_NAME,
+	.reg_bits = 8,
+	.val_bits = 8,
+	.use_single_rw = 1,
+
+	.volatile_table = &apds9960_volatile_table,
+	.precious_table = &apds9960_precious_table,
+	.rd_table = &apds9960_readable_table,
+	.wr_table = &apds9960_writeable_table,
+
+	.reg_defaults = apds9960_reg_defaults,
+	.num_reg_defaults = ARRAY_SIZE(apds9960_reg_defaults),
+	.max_register = APDS9960_REG_GFIFO_DIR(RIGHT),
+	.cache_type = REGCACHE_RBTREE,
+};
+
+static const struct iio_event_spec apds9960_pxs_event_spec[] = {
+	{
+		.type = IIO_EV_TYPE_THRESH,
+		.dir = IIO_EV_DIR_RISING,
+		.mask_separate = BIT(IIO_EV_INFO_VALUE) |
+			BIT(IIO_EV_INFO_ENABLE),
+	},
+	{
+		.type = IIO_EV_TYPE_THRESH,
+		.dir = IIO_EV_DIR_FALLING,
+		.mask_separate = BIT(IIO_EV_INFO_VALUE) |
+			BIT(IIO_EV_INFO_ENABLE),
+	},
+};
+
+static const struct iio_event_spec apds9960_als_event_spec[] = {
+	{
+		.type = IIO_EV_TYPE_THRESH,
+		.dir = IIO_EV_DIR_RISING,
+		.mask_separate = BIT(IIO_EV_INFO_VALUE) |
+			BIT(IIO_EV_INFO_ENABLE),
+	},
+	{
+		.type = IIO_EV_TYPE_THRESH,
+		.dir = IIO_EV_DIR_FALLING,
+		.mask_separate = BIT(IIO_EV_INFO_VALUE) |
+			BIT(IIO_EV_INFO_ENABLE),
+	},
+};
+
+#define APDS9960_GESTURE_CHANNEL(_dir, _si) { \
+	.type = IIO_PROXIMITY, \
+	.channel = _si + 1, \
+	.scan_index = _si, \
+	.indexed = 1, \
+	.scan_type = { \
+		.sign = 'u', \
+		.realbits = 8, \
+		.storagebits = 8, \
+	}, \
+}
+
+#define APDS9960_INTENSITY_CHANNEL(_colour) { \
+	.type = IIO_INTENSITY, \
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
+			BIT(IIO_CHAN_INFO_INT_TIME), \
+	.channel2 = IIO_MOD_LIGHT_##_colour, \
+	.address = APDS9960_REG_ALS_CHANNEL(_colour), \
+	.modified = 1, \
+	.scan_index = -1, \
+}
+
+static const unsigned long apds9960_scan_masks[] = {0xf, 0};
+
+static const struct iio_chan_spec apds9960_channels[] = {
+	{
+		.type = IIO_PROXIMITY,
+		.address = APDS9960_REG_PDATA,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),
+		.channel = 0,
+		.indexed = 0,
+		.scan_index = -1,
+
+		.event_spec = apds9960_pxs_event_spec,
+		.num_event_specs = ARRAY_SIZE(apds9960_pxs_event_spec),
+	},
+	/* Gesture Sensor */
+	APDS9960_GESTURE_CHANNEL(UP, 0),
+	APDS9960_GESTURE_CHANNEL(DOWN, 1),
+	APDS9960_GESTURE_CHANNEL(LEFT, 2),
+	APDS9960_GESTURE_CHANNEL(RIGHT, 3),
+	/* ALS */
+	{
+		.type = IIO_INTENSITY,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |
+			BIT(IIO_CHAN_INFO_INT_TIME),
+		.channel2 = IIO_MOD_LIGHT_CLEAR,
+		.address = APDS9960_REG_ALS_CHANNEL(CLEAR),
+		.modified = 1,
+		.scan_index = -1,
+
+		.event_spec = apds9960_als_event_spec,
+		.num_event_specs = ARRAY_SIZE(apds9960_als_event_spec),
+	},
+	/* RGB Sensor */
+	APDS9960_INTENSITY_CHANNEL(RED),
+	APDS9960_INTENSITY_CHANNEL(GREEN),
+	APDS9960_INTENSITY_CHANNEL(BLUE),
+};
+
+/* integration time in us */
+static const int apds9960_int_time[][2] =
+	{ {28000, 246}, {100000, 219}, {200000, 182}, {700000, 0} };
+
+/* gain mapping */
+static const int apds9960_pxs_gain_map[] = {1, 2, 4, 8};
+static const int apds9960_als_gain_map[] = {1, 4, 16, 64};
+
+static IIO_CONST_ATTR(proximity_scale_available, "1 2 4 8");
+static IIO_CONST_ATTR(intensity_scale_available, "1 4 16 64");
+static IIO_CONST_ATTR_INT_TIME_AVAIL("0.028 0.1 0.2 0.7");
+
+static struct attribute *apds9960_attributes[] = {
+	&iio_const_attr_proximity_scale_available.dev_attr.attr,
+	&iio_const_attr_intensity_scale_available.dev_attr.attr,
+	&iio_const_attr_integration_time_available.dev_attr.attr,
+	NULL,
+};
+
+static struct attribute_group apds9960_attribute_group = {
+	.attrs = apds9960_attributes,
+};
+
+static const struct reg_field apds9960_reg_field_int_als =
+				REG_FIELD(APDS9960_REG_ENABLE, 4, 4);
+
+static const struct reg_field apds9960_reg_field_int_ges =
+				REG_FIELD(APDS9960_REG_GCONF_4, 1, 1);
+
+static const struct reg_field apds9960_reg_field_int_pxs =
+				REG_FIELD(APDS9960_REG_ENABLE, 5, 5);
+
+static const struct reg_field apds9960_reg_field_enable_als =
+				REG_FIELD(APDS9960_REG_ENABLE, 1, 1);
+
+static const struct reg_field apds9960_reg_field_enable_ges =
+				REG_FIELD(APDS9960_REG_ENABLE, 6, 6);
+
+static const struct reg_field apds9960_reg_field_enable_pxs =
+				REG_FIELD(APDS9960_REG_ENABLE, 2, 2);
+
+static int apds9960_set_it_time(struct apds9960_data *data, int val2)
+{
+	int ret = -EINVAL;
+	int idx;
+
+	for (idx = 0; idx < ARRAY_SIZE(apds9960_int_time); idx++) {
+		if (apds9960_int_time[idx][0] == val2) {
+			mutex_lock(&data->lock);
+			ret = regmap_write(data->regmap, APDS9960_REG_ATIME,
+						 apds9960_int_time[idx][1]);
+			if (!ret)
+				data->als_adc_int_us = val2;
+			mutex_unlock(&data->lock);
+			break;
+		}
+	}
+
+	return ret;
+}
+
+static int apds9960_set_pxs_gain(struct apds9960_data *data, int val)
+{
+	int ret = -EINVAL;
+	int idx;
+
+	for (idx = 0; idx < ARRAY_SIZE(apds9960_pxs_gain_map); idx++) {
+		if (apds9960_pxs_gain_map[idx] == val) {
+			/* pxs + gesture gains are mirrored */
+			mutex_lock(&data->lock);
+			ret = regmap_update_bits(data->regmap,
+				APDS9960_REG_CONTROL,
+				APDS9960_REG_CONTROL_PGAIN_MASK,
+				idx << APDS9960_REG_CONTROL_PGAIN_MASK_SHIFT);
+			if (ret) {
+				mutex_unlock(&data->lock);
+				break;
+			}
+
+			ret = regmap_update_bits(data->regmap,
+				APDS9960_REG_CONFIG_2,
+				APDS9960_REG_CONFIG_2_GGAIN_MASK,
+				idx << APDS9960_REG_CONFIG_2_GGAIN_MASK_SHIFT);
+			if (!ret)
+				data->pxs_gain = idx;
+			mutex_unlock(&data->lock);
+			break;
+		}
+	}
+
+	return ret;
+}
+
+static int apds9960_set_als_gain(struct apds9960_data *data, int val)
+{
+	int ret = -EINVAL;
+	int idx;
+
+	for (idx = 0; idx < ARRAY_SIZE(apds9960_als_gain_map); idx++) {
+		if (apds9960_als_gain_map[idx] == val) {
+			mutex_lock(&data->lock);
+			ret = regmap_update_bits(data->regmap,
+					APDS9960_REG_CONTROL,
+					APDS9960_REG_CONTROL_AGAIN_MASK, idx);
+			if (!ret)
+				data->als_gain = idx;
+			mutex_unlock(&data->lock);
+			break;
+		}
+	}
+
+	return ret;
+}
+
+#ifdef CONFIG_PM
+static int apds9960_set_power_state(struct apds9960_data *data, bool on)
+{
+	struct device *dev = &data->client->dev;
+	int ret = 0;
+
+	mutex_lock(&data->lock);
+
+	if (on) {
+		int suspended;
+
+		suspended = pm_runtime_suspended(dev);
+		ret = pm_runtime_get_sync(dev);
+
+		/* Allow one integration cycle before allowing a reading */
+		if (suspended)
+			usleep_range(data->als_adc_int_us,
+				     APDS9960_MAX_INT_TIME_IN_US);
+	} else {
+		pm_runtime_mark_last_busy(dev);
+		ret = pm_runtime_put_autosuspend(dev);
+	}
+
+	mutex_unlock(&data->lock);
+
+	return ret;
+}
+#else
+static int apds9960_set_power_state(struct apds9960_data *data, bool on)
+{
+	return 0;
+}
+#endif
+
+static int apds9960_read_raw(struct iio_dev *indio_dev,
+			     struct iio_chan_spec const *chan,
+			     int *val, int *val2, long mask)
+{
+	struct apds9960_data *data = iio_priv(indio_dev);
+	__le16 buf;
+	int ret = -EINVAL;
+
+	if (data->gesture_mode_running)
+		return -EBUSY;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		apds9960_set_power_state(data, true);
+		switch (chan->type) {
+		case IIO_PROXIMITY:
+			ret = regmap_read(data->regmap, chan->address, val);
+			if (!ret)
+				ret = IIO_VAL_INT;
+			break;
+		case IIO_INTENSITY:
+			ret = regmap_bulk_read(data->regmap, chan->address,
+					       &buf, 2);
+			if (!ret)
+				ret = IIO_VAL_INT;
+			*val = le16_to_cpu(buf);
+			break;
+		default:
+			ret = -EINVAL;
+		}
+		apds9960_set_power_state(data, false);
+		break;
+	case IIO_CHAN_INFO_INT_TIME:
+		/* RGB + ALS sensors only have integration time */
+		mutex_lock(&data->lock);
+		switch (chan->type) {
+		case IIO_INTENSITY:
+			*val = 0;
+			*val2 = data->als_adc_int_us;
+			ret = IIO_VAL_INT_PLUS_MICRO;
+			break;
+		default:
+			ret = -EINVAL;
+		}
+		mutex_unlock(&data->lock);
+		break;
+	case IIO_CHAN_INFO_SCALE:
+		mutex_lock(&data->lock);
+		switch (chan->type) {
+		case IIO_PROXIMITY:
+			*val = apds9960_pxs_gain_map[data->pxs_gain];
+			ret = IIO_VAL_INT;
+			break;
+		case IIO_INTENSITY:
+			*val = apds9960_als_gain_map[data->als_gain];
+			ret = IIO_VAL_INT;
+			break;
+		default:
+			ret = -EINVAL;
+		}
+		mutex_unlock(&data->lock);
+		break;
+	}
+
+	return ret;
+};
+
+static int apds9960_write_raw(struct iio_dev *indio_dev,
+			     struct iio_chan_spec const *chan,
+			     int val, int val2, long mask)
+{
+	struct apds9960_data *data = iio_priv(indio_dev);
+
+	switch (mask) {
+	case IIO_CHAN_INFO_INT_TIME:
+		/* RGB + ALS sensors only have int time */
+		switch (chan->type) {
+		case IIO_INTENSITY:
+			if (val != 0)
+				return -EINVAL;
+			return apds9960_set_it_time(data, val2);
+		default:
+			return -EINVAL;
+		}
+	case IIO_CHAN_INFO_SCALE:
+		if (val2 != 0)
+			return -EINVAL;
+		switch (chan->type) {
+		case IIO_PROXIMITY:
+			return apds9960_set_pxs_gain(data, val);
+		case IIO_INTENSITY:
+			return apds9960_set_als_gain(data, val);
+		default:
+			return -EINVAL;
+		}
+	default:
+		return -EINVAL;
+	};
+
+	return 0;
+}
+
+static inline int apds9960_get_thres_reg(const struct iio_chan_spec *chan,
+					 enum iio_event_direction dir,
+					 u8 *reg)
+{
+	switch (dir) {
+	case IIO_EV_DIR_RISING:
+		switch (chan->type) {
+		case IIO_PROXIMITY:
+			*reg = APDS9960_REG_PIHT;
+			break;
+		case IIO_INTENSITY:
+			*reg = APDS9960_REG_AIHTL;
+			break;
+		default:
+			return -EINVAL;
+		}
+		break;
+	case IIO_EV_DIR_FALLING:
+		switch (chan->type) {
+		case IIO_PROXIMITY:
+			*reg = APDS9960_REG_PILT;
+			break;
+		case IIO_INTENSITY:
+			*reg = APDS9960_REG_AILTL;
+			break;
+		default:
+			return -EINVAL;
+		}
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int apds9960_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)
+{
+	u8 reg;
+	__le16 buf;
+	int ret = 0;
+	struct apds9960_data *data = iio_priv(indio_dev);
+
+	if (info != IIO_EV_INFO_VALUE)
+		return -EINVAL;
+
+	ret = apds9960_get_thres_reg(chan, dir, &reg);
+	if (ret < 0)
+		return ret;
+
+	if (chan->type == IIO_PROXIMITY) {
+		ret = regmap_read(data->regmap, reg, val);
+		if (ret < 0)
+			return ret;
+	} else if (chan->type == IIO_INTENSITY) {
+		ret = regmap_bulk_read(data->regmap, reg, &buf, 2);
+		if (ret < 0)
+			return ret;
+		*val = le16_to_cpu(buf);
+	} else
+		return -EINVAL;
+
+	*val2 = 0;
+
+	return IIO_VAL_INT;
+}
+
+static int apds9960_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)
+{
+	u8 reg;
+	__le16 buf;
+	int ret = 0;
+	struct apds9960_data *data = iio_priv(indio_dev);
+
+	if (info != IIO_EV_INFO_VALUE)
+		return -EINVAL;
+
+	ret = apds9960_get_thres_reg(chan, dir, &reg);
+	if (ret < 0)
+		return ret;
+
+	if (chan->type == IIO_PROXIMITY) {
+		if (val < 0 || val > APDS9960_MAX_PXS_THRES_VAL)
+			return -EINVAL;
+		ret = regmap_write(data->regmap, reg, val);
+		if (ret < 0)
+			return ret;
+	} else if (chan->type == IIO_INTENSITY) {
+		if (val < 0 || val > APDS9960_MAX_ALS_THRES_VAL)
+			return -EINVAL;
+		buf = cpu_to_le16(val);
+		ret = regmap_bulk_write(data->regmap, reg, &buf, 2);
+		if (ret < 0)
+			return ret;
+	} else
+		return -EINVAL;
+
+	return 0;
+}
+
+static int apds9960_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 apds9960_data *data = iio_priv(indio_dev);
+
+	switch (chan->type) {
+	case IIO_PROXIMITY:
+		return data->pxs_int;
+	case IIO_INTENSITY:
+		return data->als_int;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int apds9960_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 apds9960_data *data = iio_priv(indio_dev);
+	int ret;
+
+	state = !!state;
+
+	switch (chan->type) {
+	case IIO_PROXIMITY:
+		if (data->pxs_int == state)
+			return -EINVAL;
+
+		ret = regmap_field_write(data->reg_int_pxs, state);
+		if (ret)
+			return ret;
+		data->pxs_int = state;
+		apds9960_set_power_state(data, state);
+		break;
+	case IIO_INTENSITY:
+		if (data->als_int == state)
+			return -EINVAL;
+
+		ret = regmap_field_write(data->reg_int_als, state);
+		if (ret)
+			return ret;
+		data->als_int = state;
+		apds9960_set_power_state(data, state);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static const struct iio_info apds9960_info = {
+	.driver_module = THIS_MODULE,
+	.attrs = &apds9960_attribute_group,
+	.read_raw = apds9960_read_raw,
+	.write_raw = apds9960_write_raw,
+	.read_event_value = apds9960_read_event,
+	.write_event_value = apds9960_write_event,
+	.read_event_config = apds9960_read_event_config,
+	.write_event_config = apds9960_write_event_config,
+
+};
+
+static inline int apds9660_fifo_is_empty(struct apds9960_data *data)
+{
+	int cnt;
+	int ret;
+
+	ret = regmap_read(data->regmap, APDS9960_REG_GFLVL, &cnt);
+	if (ret)
+		return ret;
+
+	return cnt;
+}
+
+static void apds9960_read_gesture_fifo(struct apds9960_data *data)
+{
+	int ret, cnt = 0;
+
+	mutex_lock(&data->lock);
+	data->gesture_mode_running = 1;
+
+	while (cnt-- || (cnt = apds9660_fifo_is_empty(data) > 0)) {
+		ret = regmap_bulk_read(data->regmap, APDS9960_REG_GFIFO_BASE,
+				      &data->buffer, 4);
+
+		if (ret)
+			goto err_read;
+
+		iio_push_to_buffers(data->indio_dev, data->buffer);
+	}
+
+err_read:
+	data->gesture_mode_running = 0;
+	mutex_unlock(&data->lock);
+}
+
+static irqreturn_t apds9960_interrupt_handler(int irq, void *private)
+{
+	struct iio_dev *indio_dev = private;
+	struct apds9960_data *data = iio_priv(indio_dev);
+	int ret, status;
+
+	ret = regmap_read(data->regmap, APDS9960_REG_STATUS, &status);
+	if (ret < 0) {
+		dev_err(&data->client->dev, "irq status reg read failed\n");
+		return IRQ_HANDLED;
+	}
+
+	if ((status & APDS9960_REG_STATUS_ALS_INT) && data->als_int) {
+		iio_push_event(indio_dev,
+			       IIO_UNMOD_EVENT_CODE(IIO_INTENSITY, 0,
+						    IIO_EV_TYPE_THRESH,
+						    IIO_EV_DIR_EITHER),
+			       iio_get_time_ns());
+		regmap_write(data->regmap, APDS9960_REG_CICLEAR, 1);
+	}
+
+	if ((status & APDS9960_REG_STATUS_PS_INT) && data->pxs_int) {
+		iio_push_event(indio_dev,
+			       IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 0,
+						    IIO_EV_TYPE_THRESH,
+						    IIO_EV_DIR_EITHER),
+			       iio_get_time_ns());
+		regmap_write(data->regmap, APDS9960_REG_PICLEAR, 1);
+	}
+
+	if (status & APDS9960_REG_STATUS_GINT)
+		apds9960_read_gesture_fifo(data);
+
+	return IRQ_HANDLED;
+}
+
+static int apds9960_set_powermode(struct apds9960_data *data, bool state)
+{
+	return regmap_update_bits(data->regmap, APDS9960_REG_ENABLE, 1, state);
+}
+
+static int apds9960_buffer_postenable(struct iio_dev *indio_dev)
+{
+	struct apds9960_data *data = iio_priv(indio_dev);
+	int ret;
+
+	ret = regmap_field_write(data->reg_int_ges, 1);
+	if (ret)
+		return ret;
+
+	ret = regmap_field_write(data->reg_enable_ges, 1);
+	if (ret)
+		return ret;
+
+	pm_runtime_get_sync(&data->client->dev);
+
+	return 0;
+}
+
+static int apds9960_buffer_predisable(struct iio_dev *indio_dev)
+{
+	struct apds9960_data *data = iio_priv(indio_dev);
+	int ret;
+
+	ret = regmap_field_write(data->reg_enable_ges, 0);
+	if (ret)
+		return ret;
+
+	ret = regmap_field_write(data->reg_int_ges, 0);
+	if (ret)
+		return ret;
+
+	pm_runtime_put_autosuspend(&data->client->dev);
+
+	return 0;
+}
+
+static const struct iio_buffer_setup_ops apds9960_buffer_setup_ops = {
+	.postenable = apds9960_buffer_postenable,
+	.predisable = apds9960_buffer_predisable,
+};
+
+static int apds9960_regfield_init(struct apds9960_data *data)
+{
+	struct device *dev = &data->client->dev;
+	struct regmap *regmap = data->regmap;
+
+	data->reg_int_als = devm_regmap_field_alloc(dev, regmap,
+						apds9960_reg_field_int_als);
+	if (IS_ERR(data->reg_int_als)) {
+		dev_err(dev, "INT ALS reg field init failed\n");
+		return PTR_ERR(data->reg_int_als);
+	}
+
+	data->reg_int_ges = devm_regmap_field_alloc(dev, regmap,
+						apds9960_reg_field_int_ges);
+	if (IS_ERR(data->reg_int_ges)) {
+		dev_err(dev, "INT gesture reg field init failed\n");
+		return PTR_ERR(data->reg_int_ges);
+	}
+
+	data->reg_int_pxs = devm_regmap_field_alloc(dev, regmap,
+						apds9960_reg_field_int_pxs);
+	if (IS_ERR(data->reg_int_pxs)) {
+		dev_err(dev, "INT pxs reg field init failed\n");
+		return PTR_ERR(data->reg_int_pxs);
+	}
+
+	data->reg_enable_als = devm_regmap_field_alloc(dev, regmap,
+						apds9960_reg_field_enable_als);
+	if (IS_ERR(data->reg_enable_als)) {
+		dev_err(dev, "Enable ALS reg field init failed\n");
+		return PTR_ERR(data->reg_enable_als);
+	}
+
+	data->reg_enable_ges = devm_regmap_field_alloc(dev, regmap,
+						apds9960_reg_field_enable_ges);
+	if (IS_ERR(data->reg_enable_ges)) {
+		dev_err(dev, "Enable gesture reg field init failed\n");
+		return PTR_ERR(data->reg_enable_ges);
+	}
+
+	data->reg_enable_pxs = devm_regmap_field_alloc(dev, regmap,
+						apds9960_reg_field_enable_pxs);
+	if (IS_ERR(data->reg_enable_pxs)) {
+		dev_err(dev, "Enable PXS reg field init failed\n");
+		return PTR_ERR(data->reg_enable_pxs);
+	}
+
+	return 0;
+}
+
+static int apds9960_chip_init(struct apds9960_data *data)
+{
+	int ret;
+
+	/* Default IT for ALS of 28 ms */
+	ret = apds9960_set_it_time(data, 28000);
+	if (ret)
+		return ret;
+
+	/* Ensure gesture interrupt is OFF */
+	ret = regmap_field_write(data->reg_int_ges, 0);
+	if (ret)
+		return ret;
+
+	/* Disable gesture sensor, since polling is useless from user-space */
+	ret = regmap_field_write(data->reg_enable_ges, 0);
+	if (ret)
+		return ret;
+
+	/* Ensure proximity interrupt is OFF */
+	ret = regmap_field_write(data->reg_int_pxs, 0);
+	if (ret)
+		return ret;
+
+	/* Enable proximity sensor for polling */
+	ret = regmap_field_write(data->reg_enable_pxs, 1);
+	if (ret)
+		return ret;
+
+	/* Ensure ALS interrupt is OFF */
+	ret = regmap_field_write(data->reg_int_als, 0);
+	if (ret)
+		return ret;
+
+	/* Enable ALS sensor for polling */
+	ret = regmap_field_write(data->reg_enable_als, 1);
+	if (ret)
+		return ret;
+	/*
+	 * When enabled trigger an interrupt after 3 readings
+	 * outside threshold for ALS + PXS
+	 */
+	ret = regmap_write(data->regmap, APDS9960_REG_PERS,
+			   APDS9960_DEFAULT_PERS);
+	if (ret)
+		return ret;
+
+	/*
+	 * Wait for 4 event outside gesture threshold to prevent interrupt
+	 * flooding.
+	 */
+	ret = regmap_update_bits(data->regmap, APDS9960_REG_GCONF_1,
+			APDS9960_REG_GCONF_1_GFIFO_THRES_MASK,
+			BIT(0) << APDS9960_REG_GCONF_1_GFIFO_THRES_MASK_SHIFT);
+	if (ret)
+		return ret;
+
+	/* Default ENTER and EXIT thresholds for the GESTURE engine. */
+	ret = regmap_write(data->regmap, APDS9960_REG_GPENTH,
+			   APDS9960_DEFAULT_GPENTH);
+	if (ret)
+		return ret;
+
+	ret = regmap_write(data->regmap, APDS9960_REG_GEXTH,
+			   APDS9960_DEFAULT_GEXTH);
+	if (ret)
+		return ret;
+
+	return apds9960_set_powermode(data, 1);
+}
+
+static int apds9960_probe(struct i2c_client *client,
+			  const struct i2c_device_id *id)
+{
+	struct apds9960_data *data;
+	struct iio_buffer *buffer;
+	struct iio_dev *indio_dev;
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	buffer = devm_iio_kfifo_allocate(&client->dev);
+	if (!buffer)
+		return -ENOMEM;
+
+	iio_device_attach_buffer(indio_dev, buffer);
+
+	indio_dev->info = &apds9960_info;
+	indio_dev->name = APDS9960_DRV_NAME;
+	indio_dev->channels = apds9960_channels;
+	indio_dev->num_channels = ARRAY_SIZE(apds9960_channels);
+	indio_dev->available_scan_masks = apds9960_scan_masks;
+	indio_dev->modes = (INDIO_BUFFER_SOFTWARE | INDIO_DIRECT_MODE);
+	indio_dev->setup_ops = &apds9960_buffer_setup_ops;
+
+	data = iio_priv(indio_dev);
+	i2c_set_clientdata(client, indio_dev);
+
+	data->regmap = devm_regmap_init_i2c(client, &apds9960_regmap_config);
+	if (IS_ERR(data->regmap)) {
+		dev_err(&client->dev, "regmap initialization failed.\n");
+		return PTR_ERR(data->regmap);
+	}
+
+	data->client = client;
+	data->indio_dev = indio_dev;
+	mutex_init(&data->lock);
+
+	ret = pm_runtime_set_active(&client->dev);
+	if (ret)
+		goto error_power_down;
+
+	pm_runtime_enable(&client->dev);
+	pm_runtime_set_autosuspend_delay(&client->dev, 5000);
+	pm_runtime_use_autosuspend(&client->dev);
+
+	apds9960_set_power_state(data, true);
+
+	ret = apds9960_regfield_init(data);
+	if (ret)
+		goto error_power_down;
+
+	ret = apds9960_chip_init(data);
+	if (ret)
+		goto error_power_down;
+
+	if (client->irq <= 0) {
+		dev_err(&client->dev, "no valid irq defined\n");
+		ret = -EINVAL;
+		goto error_power_down;
+	}
+	ret = devm_request_threaded_irq(&client->dev, client->irq,
+					NULL, apds9960_interrupt_handler,
+					IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+					"apds9960_event",
+					indio_dev);
+	if (ret) {
+		dev_err(&client->dev, "request irq (%d) failed\n", client->irq);
+		goto error_power_down;
+	}
+
+	ret = iio_device_register(indio_dev);
+	if (ret)
+		goto error_power_down;
+
+	apds9960_set_power_state(data, false);
+
+	return 0;
+
+error_power_down:
+	apds9960_set_power_state(data, false);
+
+	return ret;
+}
+
+static int apds9960_remove(struct i2c_client *client)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
+	struct apds9960_data *data = iio_priv(indio_dev);
+
+	iio_device_unregister(indio_dev);
+	pm_runtime_disable(&client->dev);
+	pm_runtime_set_suspended(&client->dev);
+	apds9960_set_powermode(data, 0);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int apds9960_runtime_suspend(struct device *dev)
+{
+	struct apds9960_data *data =
+			iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
+
+	return apds9960_set_powermode(data, 0);
+}
+
+static int apds9960_runtime_resume(struct device *dev)
+{
+	struct apds9960_data *data =
+			iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
+
+	return apds9960_set_powermode(data, 1);
+}
+#endif
+
+static const struct dev_pm_ops apds9960_pm_ops = {
+	SET_RUNTIME_PM_OPS(apds9960_runtime_suspend,
+			   apds9960_runtime_resume, NULL)
+};
+
+static const struct i2c_device_id apds9960_id[] = {
+	{ "apds9960", 0 },
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, apds9960_id);
+
+static struct i2c_driver apds9960_driver = {
+	.driver = {
+		.name	= APDS9960_DRV_NAME,
+		.pm	= &apds9960_pm_ops,
+	},
+	.probe		= apds9960_probe,
+	.remove		= apds9960_remove,
+	.id_table	= apds9960_id,
+};
+module_i2c_driver(apds9960_driver);
+
+MODULE_AUTHOR("Matt Ranostay <mranostay@gmail.com>");
+MODULE_DESCRIPTION("ADPS9960 Gesture/RGB/ALS/Proximity sensor");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/opt3001.c b/drivers/iio/light/opt3001.c
index 923aa6aef..01e111e72 100644
--- a/drivers/iio/light/opt3001.c
+++ b/drivers/iio/light/opt3001.c
@@ -793,7 +793,6 @@ static struct i2c_driver opt3001_driver = {
 	.driver = {
 		.name = "opt3001",
 		.of_match_table = of_match_ptr(opt3001_of_match),
-		.owner = THIS_MODULE,
 	},
 };
 
diff --git a/drivers/iio/light/stk3310.c b/drivers/iio/light/stk3310.c
index 993eb2011..42d334ba6 100644
--- a/drivers/iio/light/stk3310.c
+++ b/drivers/iio/light/stk3310.c
@@ -35,8 +35,8 @@
 #define STK3310_REG_ID				0x3E
 #define STK3310_MAX_REG				0x80
 
-#define STK3310_STATE_EN_PS			0x01
-#define STK3310_STATE_EN_ALS			0x02
+#define STK3310_STATE_EN_PS			BIT(0)
+#define STK3310_STATE_EN_ALS			BIT(1)
 #define STK3310_STATE_STANDBY			0x00
 
 #define STK3310_CHIP_ID_VAL			0x13
@@ -47,7 +47,6 @@
 #define STK3310_DRIVER_NAME			"stk3310"
 #define STK3310_REGMAP_NAME			"stk3310_regmap"
 #define STK3310_EVENT				"stk3310_event"
-#define STK3310_GPIO				"stk3310_gpio"
 
 #define STK3310_SCALE_AVAILABLE			"6.4 1.6 0.4 0.1"
 
@@ -241,8 +240,11 @@ static int stk3310_write_event(struct iio_dev *indio_dev,
 	struct stk3310_data *data = iio_priv(indio_dev);
 	struct i2c_client *client = data->client;
 
-	regmap_field_read(data->reg_ps_gain, &index);
-	if (val > stk3310_ps_max[index])
+	ret = regmap_field_read(data->reg_ps_gain, &index);
+	if (ret < 0)
+		return ret;
+
+	if (val < 0 || val > stk3310_ps_max[index])
 		return -EINVAL;
 
 	if (dir == IIO_EV_DIR_RISING)
@@ -266,9 +268,12 @@ static int stk3310_read_event_config(struct iio_dev *indio_dev,
 				     enum iio_event_direction dir)
 {
 	unsigned int event_val;
+	int ret;
 	struct stk3310_data *data = iio_priv(indio_dev);
 
-	regmap_field_read(data->reg_int_ps, &event_val);
+	ret = regmap_field_read(data->reg_int_ps, &event_val);
+	if (ret < 0)
+		return ret;
 
 	return event_val;
 }
@@ -307,14 +312,16 @@ static int stk3310_read_raw(struct iio_dev *indio_dev,
 	struct stk3310_data *data = iio_priv(indio_dev);
 	struct i2c_client *client = data->client;
 
+	if (chan->type != IIO_LIGHT && chan->type != IIO_PROXIMITY)
+		return -EINVAL;
+
 	switch (mask) {
 	case IIO_CHAN_INFO_RAW:
 		if (chan->type == IIO_LIGHT)
 			reg = STK3310_REG_ALS_DATA_MSB;
-		else if (chan->type == IIO_PROXIMITY)
-			reg = STK3310_REG_PS_DATA_MSB;
 		else
-			return -EINVAL;
+			reg = STK3310_REG_PS_DATA_MSB;
+
 		mutex_lock(&data->lock);
 		ret = regmap_bulk_read(data->regmap, reg, &buf, 2);
 		if (ret < 0) {
@@ -327,17 +334,23 @@ static int stk3310_read_raw(struct iio_dev *indio_dev,
 		return IIO_VAL_INT;
 	case IIO_CHAN_INFO_INT_TIME:
 		if (chan->type == IIO_LIGHT)
-			regmap_field_read(data->reg_als_it, &index);
+			ret = regmap_field_read(data->reg_als_it, &index);
 		else
-			regmap_field_read(data->reg_ps_it, &index);
+			ret = regmap_field_read(data->reg_ps_it, &index);
+		if (ret < 0)
+			return ret;
+
 		*val = stk3310_it_table[index][0];
 		*val2 = stk3310_it_table[index][1];
 		return IIO_VAL_INT_PLUS_MICRO;
 	case IIO_CHAN_INFO_SCALE:
 		if (chan->type == IIO_LIGHT)
-			regmap_field_read(data->reg_als_gain, &index);
+			ret = regmap_field_read(data->reg_als_gain, &index);
 		else
-			regmap_field_read(data->reg_ps_gain, &index);
+			ret = regmap_field_read(data->reg_ps_gain, &index);
+		if (ret < 0)
+			return ret;
+
 		*val = stk3310_scale_table[index][0];
 		*val2 = stk3310_scale_table[index][1];
 		return IIO_VAL_INT_PLUS_MICRO;
@@ -354,6 +367,9 @@ static int stk3310_write_raw(struct iio_dev *indio_dev,
 	int index;
 	struct stk3310_data *data = iio_priv(indio_dev);
 
+	if (chan->type != IIO_LIGHT && chan->type != IIO_PROXIMITY)
+		return -EINVAL;
+
 	switch (mask) {
 	case IIO_CHAN_INFO_INT_TIME:
 		index = stk3310_get_index(stk3310_it_table,
@@ -368,7 +384,7 @@ static int stk3310_write_raw(struct iio_dev *indio_dev,
 			ret = regmap_field_write(data->reg_ps_it, index);
 		if (ret < 0)
 			dev_err(&data->client->dev,
-					"sensor configuration failed\n");
+				"sensor configuration failed\n");
 		mutex_unlock(&data->lock);
 		return ret;
 
@@ -385,7 +401,7 @@ static int stk3310_write_raw(struct iio_dev *indio_dev,
 			ret = regmap_field_write(data->reg_ps_gain, index);
 		if (ret < 0)
 			dev_err(&data->client->dev,
-					"sensor configuration failed\n");
+				"sensor configuration failed\n");
 		mutex_unlock(&data->lock);
 		return ret;
 	}
@@ -419,8 +435,8 @@ static int stk3310_set_state(struct stk3310_data *data, u8 state)
 		dev_err(&client->dev, "failed to change sensor state\n");
 	} else if (state != STK3310_STATE_STANDBY) {
 		/* Don't reset the 'enabled' flags if we're going in standby */
-		data->ps_enabled  = !!(state & 0x01);
-		data->als_enabled = !!(state & 0x02);
+		data->ps_enabled  = !!(state & STK3310_STATE_EN_PS);
+		data->als_enabled = !!(state & STK3310_STATE_EN_ALS);
 	}
 	mutex_unlock(&data->lock);
 
@@ -435,7 +451,10 @@ static int stk3310_init(struct iio_dev *indio_dev)
 	struct stk3310_data *data = iio_priv(indio_dev);
 	struct i2c_client *client = data->client;
 
-	regmap_read(data->regmap, STK3310_REG_ID, &chipid);
+	ret = regmap_read(data->regmap, STK3310_REG_ID, &chipid);
+	if (ret < 0)
+		return ret;
+
 	if (chipid != STK3310_CHIP_ID_VAL &&
 	    chipid != STK3311_CHIP_ID_VAL) {
 		dev_err(&client->dev, "invalid chip id: 0x%x\n", chipid);
@@ -457,30 +476,6 @@ static int stk3310_init(struct iio_dev *indio_dev)
 	return ret;
 }
 
-static int stk3310_gpio_probe(struct i2c_client *client)
-{
-	struct device *dev;
-	struct gpio_desc *gpio;
-	int ret;
-
-	if (!client)
-		return -EINVAL;
-
-	dev = &client->dev;
-
-	/* gpio interrupt pin */
-	gpio = devm_gpiod_get_index(dev, STK3310_GPIO, 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 bool stk3310_is_volatile_reg(struct device *dev, unsigned int reg)
 {
 	switch (reg) {
@@ -604,27 +599,30 @@ static int stk3310_probe(struct i2c_client *client,
 	if (ret < 0)
 		return ret;
 
-	if (client->irq < 0)
-		client->irq = stk3310_gpio_probe(client);
-
-	if (client->irq >= 0) {
+	if (client->irq > 0) {
 		ret = devm_request_threaded_irq(&client->dev, client->irq,
 						stk3310_irq_handler,
 						stk3310_irq_event_handler,
 						IRQF_TRIGGER_FALLING |
 						IRQF_ONESHOT,
 						STK3310_EVENT, indio_dev);
-		if (ret < 0)
+		if (ret < 0) {
 			dev_err(&client->dev, "request irq %d failed\n",
-					client->irq);
+				client->irq);
+			goto err_standby;
+		}
 	}
 
 	ret = iio_device_register(indio_dev);
 	if (ret < 0) {
 		dev_err(&client->dev, "device_register failed\n");
-		stk3310_set_state(data, STK3310_STATE_STANDBY);
+		goto err_standby;
 	}
 
+	return 0;
+
+err_standby:
+	stk3310_set_state(data, STK3310_STATE_STANDBY);
 	return ret;
 }
 
@@ -648,7 +646,7 @@ static int stk3310_suspend(struct device *dev)
 
 static int stk3310_resume(struct device *dev)
 {
-	int state = 0;
+	u8 state = 0;
 	struct stk3310_data *data;
 
 	data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
diff --git a/drivers/iio/light/tsl4531.c b/drivers/iio/light/tsl4531.c
index 26979183d..cf94ec72b 100644
--- a/drivers/iio/light/tsl4531.c
+++ b/drivers/iio/light/tsl4531.c
@@ -158,9 +158,9 @@ static int tsl4531_check_id(struct i2c_client *client)
 	case TSL45313_ID:
 	case TSL45315_ID:
 	case TSL45317_ID:
-		return 1;
-	default:
 		return 0;
+	default:
+		return -ENODEV;
 	}
 }
 
@@ -180,9 +180,10 @@ static int tsl4531_probe(struct i2c_client *client,
 	data->client = client;
 	mutex_init(&data->lock);
 
-	if (!tsl4531_check_id(client)) {
+	ret = tsl4531_check_id(client);
+	if (ret) {
 		dev_err(&client->dev, "no TSL4531 sensor\n");
-		return -ENODEV;
+		return ret;
 	}
 
 	ret = i2c_smbus_write_byte_data(data->client, TSL4531_CONTROL,
diff --git a/drivers/iio/light/us5182d.c b/drivers/iio/light/us5182d.c
new file mode 100644
index 000000000..49dab3cb3
--- /dev/null
+++ b/drivers/iio/light/us5182d.c
@@ -0,0 +1,507 @@
+/*
+ * Copyright (c) 2015 Intel Corporation
+ *
+ * Driver for UPISEMI us5182d Proximity and Ambient Light Sensor.
+ *
+ * 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.
+ *
+ * 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.
+ *
+ * To do: Interrupt support.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/acpi.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/mutex.h>
+
+#define US5182D_REG_CFG0				0x00
+#define US5182D_CFG0_ONESHOT_EN				BIT(6)
+#define US5182D_CFG0_SHUTDOWN_EN			BIT(7)
+#define US5182D_CFG0_WORD_ENABLE			BIT(0)
+
+#define US5182D_REG_CFG1				0x01
+#define US5182D_CFG1_ALS_RES16				BIT(4)
+#define US5182D_CFG1_AGAIN_DEFAULT			0x00
+
+#define US5182D_REG_CFG2				0x02
+#define US5182D_CFG2_PX_RES16				BIT(4)
+#define US5182D_CFG2_PXGAIN_DEFAULT			BIT(2)
+
+#define US5182D_REG_CFG3				0x03
+#define US5182D_CFG3_LED_CURRENT100			(BIT(4) | BIT(5))
+
+#define US5182D_REG_CFG4				0x10
+
+/*
+ * Registers for tuning the auto dark current cancelling feature.
+ * DARK_TH(reg 0x27,0x28) - threshold (counts) for auto dark cancelling.
+ * when ALS  > DARK_TH --> ALS_Code = ALS - Upper(0x2A) * Dark
+ * when ALS < DARK_TH --> ALS_Code = ALS - Lower(0x29) * Dark
+ */
+#define US5182D_REG_UDARK_TH			0x27
+#define US5182D_REG_DARK_AUTO_EN		0x2b
+#define US5182D_REG_AUTO_LDARK_GAIN		0x29
+#define US5182D_REG_AUTO_HDARK_GAIN		0x2a
+
+#define US5182D_OPMODE_ALS			0x01
+#define US5182D_OPMODE_PX			0x02
+#define US5182D_OPMODE_SHIFT			4
+
+#define US5182D_REG_DARK_AUTO_EN_DEFAULT	0x80
+#define US5182D_REG_AUTO_LDARK_GAIN_DEFAULT	0x16
+#define US5182D_REG_AUTO_HDARK_GAIN_DEFAULT	0x00
+
+#define US5182D_REG_ADL				0x0c
+#define US5182D_REG_PDL				0x0e
+
+#define US5182D_REG_MODE_STORE			0x21
+#define US5182D_STORE_MODE			0x01
+
+#define US5182D_REG_CHIPID			0xb2
+
+#define US5182D_OPMODE_MASK			GENMASK(5, 4)
+#define US5182D_AGAIN_MASK			0x07
+#define US5182D_RESET_CHIP			0x01
+
+#define US5182D_CHIPID				0x26
+#define US5182D_DRV_NAME			"us5182d"
+
+#define US5182D_GA_RESOLUTION			1000
+
+#define US5182D_READ_BYTE			1
+#define US5182D_READ_WORD			2
+#define US5182D_OPSTORE_SLEEP_TIME		20 /* ms */
+
+/* Available ranges: [12354, 7065, 3998, 2202, 1285, 498, 256, 138] lux */
+static const int us5182d_scales[] = {188500, 107800, 61000, 33600, 19600, 7600,
+				     3900, 2100};
+
+/*
+ * Experimental thresholds that work with US5182D sensor on evaluation board
+ * roughly between 12-32 lux
+ */
+static u16 us5182d_dark_ths_vals[] = {170, 200, 512, 512, 800, 2000, 4000,
+				      8000};
+
+enum mode {
+	US5182D_ALS_PX,
+	US5182D_ALS_ONLY,
+	US5182D_PX_ONLY
+};
+
+struct us5182d_data {
+	struct i2c_client *client;
+	struct mutex lock;
+
+	/* Glass attenuation factor */
+	u32 ga;
+
+	/* Dark gain tuning */
+	u8 lower_dark_gain;
+	u8 upper_dark_gain;
+	u16 *us5182d_dark_ths;
+
+	u8 opmode;
+};
+
+static IIO_CONST_ATTR(in_illuminance_scale_available,
+		      "0.0021 0.0039 0.0076 0.0196 0.0336 0.061 0.1078 0.1885");
+
+static struct attribute *us5182d_attrs[] = {
+	&iio_const_attr_in_illuminance_scale_available.dev_attr.attr,
+	NULL
+};
+
+static const struct attribute_group us5182d_attr_group = {
+	.attrs = us5182d_attrs,
+};
+
+static const struct {
+	u8 reg;
+	u8 val;
+} us5182d_regvals[] = {
+	{US5182D_REG_CFG0, (US5182D_CFG0_SHUTDOWN_EN |
+			    US5182D_CFG0_WORD_ENABLE)},
+	{US5182D_REG_CFG1, US5182D_CFG1_ALS_RES16},
+	{US5182D_REG_CFG2, (US5182D_CFG2_PX_RES16 |
+			    US5182D_CFG2_PXGAIN_DEFAULT)},
+	{US5182D_REG_CFG3, US5182D_CFG3_LED_CURRENT100},
+	{US5182D_REG_MODE_STORE, US5182D_STORE_MODE},
+	{US5182D_REG_CFG4, 0x00},
+};
+
+static const struct iio_chan_spec us5182d_channels[] = {
+	{
+		.type = IIO_LIGHT,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+				      BIT(IIO_CHAN_INFO_SCALE),
+	},
+	{
+		.type = IIO_PROXIMITY,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+	}
+};
+
+static int us5182d_get_als(struct us5182d_data *data)
+{
+	int ret;
+	unsigned long result;
+
+	ret = i2c_smbus_read_word_data(data->client,
+				       US5182D_REG_ADL);
+	if (ret < 0)
+		return ret;
+
+	result = ret * data->ga / US5182D_GA_RESOLUTION;
+	if (result > 0xffff)
+		result = 0xffff;
+
+	return result;
+}
+
+static int us5182d_set_opmode(struct us5182d_data *data, u8 mode)
+{
+	int ret;
+
+	ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CFG0);
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * In oneshot mode the chip will power itself down after taking the
+	 * required measurement.
+	 */
+	ret = ret | US5182D_CFG0_ONESHOT_EN;
+
+	/* update mode */
+	ret = ret & ~US5182D_OPMODE_MASK;
+	ret = ret | (mode << US5182D_OPMODE_SHIFT);
+
+	/*
+	 * After updating the operating mode, the chip requires that
+	 * the operation is stored, by writing 1 in the STORE_MODE
+	 * register (auto-clearing).
+	 */
+	ret = i2c_smbus_write_byte_data(data->client, US5182D_REG_CFG0, ret);
+	if (ret < 0)
+		return ret;
+
+	if (mode == data->opmode)
+		return 0;
+
+	ret = i2c_smbus_write_byte_data(data->client, US5182D_REG_MODE_STORE,
+					US5182D_STORE_MODE);
+	if (ret < 0)
+		return ret;
+
+	data->opmode = mode;
+	msleep(US5182D_OPSTORE_SLEEP_TIME);
+
+	return 0;
+}
+
+static int us5182d_read_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *chan, int *val,
+			    int *val2, long mask)
+{
+	struct us5182d_data *data = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		switch (chan->type) {
+		case IIO_LIGHT:
+			mutex_lock(&data->lock);
+			ret = us5182d_set_opmode(data, US5182D_OPMODE_ALS);
+			if (ret < 0)
+				goto out_err;
+
+			ret = us5182d_get_als(data);
+			if (ret < 0)
+				goto out_err;
+			mutex_unlock(&data->lock);
+			*val = ret;
+			return IIO_VAL_INT;
+		case IIO_PROXIMITY:
+			mutex_lock(&data->lock);
+			ret = us5182d_set_opmode(data, US5182D_OPMODE_PX);
+			if (ret < 0)
+				goto out_err;
+
+			ret = i2c_smbus_read_word_data(data->client,
+						       US5182D_REG_PDL);
+			if (ret < 0)
+				goto out_err;
+			mutex_unlock(&data->lock);
+			*val = ret;
+			return  IIO_VAL_INT;
+		default:
+			return -EINVAL;
+		}
+
+	case IIO_CHAN_INFO_SCALE:
+		ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CFG1);
+		if (ret < 0)
+			return ret;
+
+		*val = 0;
+		*val2 = us5182d_scales[ret & US5182D_AGAIN_MASK];
+
+		return IIO_VAL_INT_PLUS_MICRO;
+	default:
+		return -EINVAL;
+	}
+
+	return -EINVAL;
+out_err:
+	mutex_unlock(&data->lock);
+	return ret;
+}
+
+/**
+ * us5182d_update_dark_th - update Darh_Th registers
+ * @data	us5182d_data structure
+ * @index	index in us5182d_dark_ths array to use for the updated value
+ *
+ * Function needs to be called with a lock held because it needs two i2c write
+ * byte operations as these registers (0x27 0x28) don't work in word mode
+ * accessing.
+ */
+static int us5182d_update_dark_th(struct us5182d_data *data, int index)
+{
+	__be16 dark_th = cpu_to_be16(data->us5182d_dark_ths[index]);
+	int ret;
+
+	ret = i2c_smbus_write_byte_data(data->client, US5182D_REG_UDARK_TH,
+					((u8 *)&dark_th)[0]);
+	if (ret < 0)
+		return ret;
+
+	return i2c_smbus_write_byte_data(data->client, US5182D_REG_UDARK_TH + 1,
+					((u8 *)&dark_th)[1]);
+}
+
+/**
+ * us5182d_apply_scale - update the ALS scale
+ * @data	us5182d_data structure
+ * @index	index in us5182d_scales array to use for the updated value
+ *
+ * Function needs to be called with a lock held as we're having more than one
+ * i2c operation.
+ */
+static int us5182d_apply_scale(struct us5182d_data *data, int index)
+{
+	int ret;
+
+	ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CFG1);
+	if (ret < 0)
+		return ret;
+
+	ret = ret & (~US5182D_AGAIN_MASK);
+	ret |= index;
+
+	ret = i2c_smbus_write_byte_data(data->client, US5182D_REG_CFG1, ret);
+	if (ret < 0)
+		return ret;
+
+	return us5182d_update_dark_th(data, index);
+}
+
+static int us5182d_write_raw(struct iio_dev *indio_dev,
+			     struct iio_chan_spec const *chan, int val,
+			     int val2, long mask)
+{
+	struct us5182d_data *data = iio_priv(indio_dev);
+	int ret, i;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_SCALE:
+		if (val != 0)
+			return -EINVAL;
+		for (i = 0; i < ARRAY_SIZE(us5182d_scales); i++)
+			if (val2 == us5182d_scales[i]) {
+				mutex_lock(&data->lock);
+				ret = us5182d_apply_scale(data, i);
+				mutex_unlock(&data->lock);
+				return ret;
+			}
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return -EINVAL;
+}
+
+static const struct iio_info us5182d_info = {
+	.driver_module	= THIS_MODULE,
+	.read_raw = us5182d_read_raw,
+	.write_raw = us5182d_write_raw,
+	.attrs = &us5182d_attr_group,
+};
+
+static int us5182d_reset(struct iio_dev *indio_dev)
+{
+	struct us5182d_data *data = iio_priv(indio_dev);
+
+	return i2c_smbus_write_byte_data(data->client, US5182D_REG_CFG3,
+					 US5182D_RESET_CHIP);
+}
+
+static int us5182d_init(struct iio_dev *indio_dev)
+{
+	struct us5182d_data *data = iio_priv(indio_dev);
+	int i, ret;
+
+	ret = us5182d_reset(indio_dev);
+	if (ret < 0)
+		return ret;
+
+	data->opmode = 0;
+	for (i = 0; i < ARRAY_SIZE(us5182d_regvals); i++) {
+		ret = i2c_smbus_write_byte_data(data->client,
+						us5182d_regvals[i].reg,
+						us5182d_regvals[i].val);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}
+
+static void us5182d_get_platform_data(struct iio_dev *indio_dev)
+{
+	struct us5182d_data *data = iio_priv(indio_dev);
+
+	if (device_property_read_u32(&data->client->dev, "upisemi,glass-coef",
+				     &data->ga))
+		data->ga = US5182D_GA_RESOLUTION;
+	if (device_property_read_u16_array(&data->client->dev,
+					   "upisemi,dark-ths",
+					   data->us5182d_dark_ths,
+					   ARRAY_SIZE(us5182d_dark_ths_vals)))
+		data->us5182d_dark_ths = us5182d_dark_ths_vals;
+	if (device_property_read_u8(&data->client->dev,
+				    "upisemi,upper-dark-gain",
+				    &data->upper_dark_gain))
+		data->upper_dark_gain = US5182D_REG_AUTO_HDARK_GAIN_DEFAULT;
+	if (device_property_read_u8(&data->client->dev,
+				    "upisemi,lower-dark-gain",
+				    &data->lower_dark_gain))
+		data->lower_dark_gain = US5182D_REG_AUTO_LDARK_GAIN_DEFAULT;
+}
+
+static int  us5182d_dark_gain_config(struct iio_dev *indio_dev)
+{
+	struct us5182d_data *data = iio_priv(indio_dev);
+	int ret;
+
+	ret = us5182d_update_dark_th(data, US5182D_CFG1_AGAIN_DEFAULT);
+	if (ret < 0)
+		return ret;
+
+	ret = i2c_smbus_write_byte_data(data->client,
+					US5182D_REG_AUTO_LDARK_GAIN,
+					data->lower_dark_gain);
+	if (ret < 0)
+		return ret;
+
+	ret = i2c_smbus_write_byte_data(data->client,
+					US5182D_REG_AUTO_HDARK_GAIN,
+					data->upper_dark_gain);
+	if (ret < 0)
+		return ret;
+
+	return i2c_smbus_write_byte_data(data->client, US5182D_REG_DARK_AUTO_EN,
+					 US5182D_REG_DARK_AUTO_EN_DEFAULT);
+}
+
+static int us5182d_probe(struct i2c_client *client,
+			 const struct i2c_device_id *id)
+{
+	struct us5182d_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;
+
+	mutex_init(&data->lock);
+
+	indio_dev->dev.parent = &client->dev;
+	indio_dev->info = &us5182d_info;
+	indio_dev->name = US5182D_DRV_NAME;
+	indio_dev->channels = us5182d_channels;
+	indio_dev->num_channels = ARRAY_SIZE(us5182d_channels);
+	indio_dev->modes = INDIO_DIRECT_MODE;
+
+	ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CHIPID);
+	if (ret != US5182D_CHIPID) {
+		dev_err(&data->client->dev,
+			"Failed to detect US5182 light chip\n");
+		return (ret < 0) ? ret : -ENODEV;
+	}
+
+	us5182d_get_platform_data(indio_dev);
+	ret = us5182d_init(indio_dev);
+	if (ret < 0)
+		return ret;
+
+	ret = us5182d_dark_gain_config(indio_dev);
+	if (ret < 0)
+		return ret;
+
+	return iio_device_register(indio_dev);
+}
+
+static int us5182d_remove(struct i2c_client *client)
+{
+	iio_device_unregister(i2c_get_clientdata(client));
+	return i2c_smbus_write_byte_data(client, US5182D_REG_CFG0,
+					 US5182D_CFG0_SHUTDOWN_EN);
+}
+
+static const struct acpi_device_id us5182d_acpi_match[] = {
+	{ "USD5182", 0},
+	{}
+};
+
+MODULE_DEVICE_TABLE(acpi, us5182d_acpi_match);
+
+static const struct i2c_device_id us5182d_id[] = {
+		{"usd5182", 0},
+		{}
+};
+
+MODULE_DEVICE_TABLE(i2c, us5182d_id);
+
+static struct i2c_driver us5182d_driver = {
+	.driver = {
+		.name = US5182D_DRV_NAME,
+		.acpi_match_table = ACPI_PTR(us5182d_acpi_match),
+	},
+	.probe = us5182d_probe,
+	.remove = us5182d_remove,
+	.id_table = us5182d_id,
+
+};
+module_i2c_driver(us5182d_driver);
+
+MODULE_AUTHOR("Adriana Reus <adriana.reus@intel.com>");
+MODULE_DESCRIPTION("Driver for us5182d Proximity and Light Sensor");
+MODULE_LICENSE("GPL v2");