xref: /linux/drivers/iio/light/apds9160.c (revision 4f9786035f9e519db41375818e1d0b5f20da2f10)

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * APDS9160 sensor driver.
 * Chip is combined proximity and ambient light sensor.
 * Author: 2024 Mikael Gonella-Bolduc <m.gonella.bolduc@gmail.com>
 */

#include <linux/bits.h>
#include <linux/bitfield.h>
#include <linux/cleanup.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/types.h>
#include <linux/units.h>

#include <linux/iio/iio.h>
#include <linux/iio/events.h>
#include <linux/iio/sysfs.h>

#include <linux/unaligned.h>

#define APDS9160_REGMAP_NAME "apds9160_regmap"

/* Main control register */
#define APDS9160_REG_CTRL 0x00
#define APDS9160_CTRL_SWRESET BIT(4) /* 1: Activate reset */
#define APDS9160_CTRL_MODE_RGB BIT(2) /* 0: ALS & IR, 1: RGB & IR */
#define APDS9160_CTRL_EN_ALS BIT(1) /* 1: ALS active */
#define APDS9160_CTLR_EN_PS BIT(0) /* 1: PS active */

/* Status register  */
#define APDS9160_SR_LS_INT BIT(4)
#define APDS9160_SR_LS_NEW_DATA BIT(3)
#define APDS9160_SR_PS_INT BIT(1)
#define APDS9160_SR_PS_NEW_DATA BIT(0)

/* Interrupt configuration registers */
#define APDS9160_REG_INT_CFG 0x19
#define APDS9160_REG_INT_PST 0x1A
#define APDS9160_INT_CFG_EN_LS BIT(2) /* LS int enable */
#define APDS9160_INT_CFG_EN_PS BIT(0) /* PS int enable */

/* Proximity registers */
#define APDS9160_REG_PS_LED 0x01
#define APDS9160_REG_PS_PULSES 0x02
#define APDS9160_REG_PS_MEAS_RATE 0x03
#define APDS9160_REG_PS_THRES_HI_LSB 0x1B
#define APDS9160_REG_PS_THRES_HI_MSB 0x1C
#define APDS9160_REG_PS_THRES_LO_LSB 0x1D
#define APDS9160_REG_PS_THRES_LO_MSB 0x1E
#define APDS9160_REG_PS_DATA_LSB 0x08
#define APDS9160_REG_PS_DATA_MSB 0x09
#define APDS9160_REG_PS_CAN_LEVEL_DIG_LSB 0x1F
#define APDS9160_REG_PS_CAN_LEVEL_DIG_MSB 0x20
#define APDS9160_REG_PS_CAN_LEVEL_ANA_DUR 0x21
#define APDS9160_REG_PS_CAN_LEVEL_ANA_CURRENT 0x22

/* Light sensor registers */
#define APDS9160_REG_LS_MEAS_RATE 0x04
#define APDS9160_REG_LS_GAIN 0x05
#define APDS9160_REG_LS_DATA_CLEAR_LSB 0x0A
#define APDS9160_REG_LS_DATA_CLEAR 0x0B
#define APDS9160_REG_LS_DATA_CLEAR_MSB 0x0C
#define APDS9160_REG_LS_DATA_ALS_LSB 0x0D
#define APDS9160_REG_LS_DATA_ALS 0x0E
#define APDS9160_REG_LS_DATA_ALS_MSB 0x0F
#define APDS9160_REG_LS_THRES_UP_LSB 0x24
#define APDS9160_REG_LS_THRES_UP 0x25
#define APDS9160_REG_LS_THRES_UP_MSB 0x26
#define APDS9160_REG_LS_THRES_LO_LSB 0x27
#define APDS9160_REG_LS_THRES_LO 0x28
#define APDS9160_REG_LS_THRES_LO_MSB 0x29
#define APDS9160_REG_LS_THRES_VAR 0x2A

/* Part identification number register */
#define APDS9160_REG_ID 0x06

/* Status register */
#define APDS9160_REG_SR 0x07
#define APDS9160_SR_DATA_ALS BIT(3)
#define APDS9160_SR_DATA_PS BIT(0)

/* Supported ID:s */
#define APDS9160_PART_ID_0 0x03

#define APDS9160_PS_THRES_MAX 0x7FF
#define APDS9160_LS_THRES_MAX 0xFFFFF
#define APDS9160_CMD_LS_RESOLUTION_25MS 0x04
#define APDS9160_CMD_LS_RESOLUTION_50MS 0x03
#define APDS9160_CMD_LS_RESOLUTION_100MS 0x02
#define APDS9160_CMD_LS_RESOLUTION_200MS 0x01
#define APDS9160_PS_DATA_MASK 0x7FF

#define APDS9160_DEFAULT_LS_GAIN 3
#define APDS9160_DEFAULT_LS_RATE 100
#define APDS9160_DEFAULT_PS_RATE 100
#define APDS9160_DEFAULT_PS_CANCELLATION_LEVEL 0
#define APDS9160_DEFAULT_PS_ANALOG_CANCELLATION 0
#define APDS9160_DEFAULT_PS_GAIN 1
#define APDS9160_DEFAULT_PS_CURRENT 100
#define APDS9160_DEFAULT_PS_RESOLUTION_11BITS 0x03

static const struct reg_default apds9160_reg_defaults[] = {
	{ APDS9160_REG_CTRL, 0x00 }, /* Sensors disabled by default  */
	{ APDS9160_REG_PS_LED, 0x33 }, /* 60 kHz frequency, 100 mA */
	{ APDS9160_REG_PS_PULSES, 0x08 }, /* 8 pulses */
	{ APDS9160_REG_PS_MEAS_RATE, 0x05 }, /* 100ms */
	{ APDS9160_REG_LS_MEAS_RATE, 0x22 }, /* 100ms */
	{ APDS9160_REG_LS_GAIN, 0x01 }, /* 3x */
	{ APDS9160_REG_INT_CFG, 0x10 }, /* Interrupts disabled */
	{ APDS9160_REG_INT_PST, 0x00 },
	{ APDS9160_REG_PS_THRES_HI_LSB, 0xFF },
	{ APDS9160_REG_PS_THRES_HI_MSB, 0x07 },
	{ APDS9160_REG_PS_THRES_LO_LSB, 0x00 },
	{ APDS9160_REG_PS_THRES_LO_MSB, 0x00 },
	{ APDS9160_REG_PS_CAN_LEVEL_DIG_LSB, 0x00 },
	{ APDS9160_REG_PS_CAN_LEVEL_DIG_MSB, 0x00 },
	{ APDS9160_REG_PS_CAN_LEVEL_ANA_DUR, 0x00 },
	{ APDS9160_REG_PS_CAN_LEVEL_ANA_CURRENT, 0x00 },
	{ APDS9160_REG_LS_THRES_UP_LSB, 0xFF },
	{ APDS9160_REG_LS_THRES_UP, 0xFF },
	{ APDS9160_REG_LS_THRES_UP_MSB, 0x0F },
	{ APDS9160_REG_LS_THRES_LO_LSB, 0x00 },
	{ APDS9160_REG_LS_THRES_LO, 0x00 },
	{ APDS9160_REG_LS_THRES_LO_MSB, 0x00 },
	{ APDS9160_REG_LS_THRES_VAR, 0x00 },
};

static const struct regmap_range apds9160_readable_ranges[] = {
	regmap_reg_range(APDS9160_REG_CTRL, APDS9160_REG_LS_THRES_VAR),
};

static const struct regmap_access_table apds9160_readable_table = {
	.yes_ranges = apds9160_readable_ranges,
	.n_yes_ranges = ARRAY_SIZE(apds9160_readable_ranges),
};

static const struct regmap_range apds9160_writeable_ranges[] = {
	regmap_reg_range(APDS9160_REG_CTRL, APDS9160_REG_LS_GAIN),
	regmap_reg_range(APDS9160_REG_INT_CFG, APDS9160_REG_LS_THRES_VAR),
};

static const struct regmap_access_table apds9160_writeable_table = {
	.yes_ranges = apds9160_writeable_ranges,
	.n_yes_ranges = ARRAY_SIZE(apds9160_writeable_ranges),
};

static const struct regmap_range apds9160_volatile_ranges[] = {
	regmap_reg_range(APDS9160_REG_SR, APDS9160_REG_LS_DATA_ALS_MSB),
};

static const struct regmap_access_table apds9160_volatile_table = {
	.yes_ranges = apds9160_volatile_ranges,
	.n_yes_ranges = ARRAY_SIZE(apds9160_volatile_ranges),
};

static const struct regmap_config apds9160_regmap_config = {
	.name = APDS9160_REGMAP_NAME,
	.reg_bits = 8,
	.val_bits = 8,
	.use_single_read = true,
	.use_single_write = true,

	.rd_table = &apds9160_readable_table,
	.wr_table = &apds9160_writeable_table,
	.volatile_table = &apds9160_volatile_table,

	.reg_defaults = apds9160_reg_defaults,
	.num_reg_defaults = ARRAY_SIZE(apds9160_reg_defaults),
	.max_register = 37,
	.cache_type = REGCACHE_RBTREE,
};

static const struct iio_event_spec apds9160_event_spec[] = {
	{
		.type = IIO_EV_TYPE_THRESH,
		.dir = IIO_EV_DIR_RISING,
		.mask_separate = BIT(IIO_EV_INFO_VALUE),
	},
	{
		.type = IIO_EV_TYPE_THRESH,
		.dir = IIO_EV_DIR_FALLING,
		.mask_separate = BIT(IIO_EV_INFO_VALUE),
	},
	{
		.type = IIO_EV_TYPE_THRESH,
		.dir = IIO_EV_DIR_EITHER,
		.mask_separate = BIT(IIO_EV_INFO_ENABLE),
	},
};

static const struct iio_chan_spec apds9160_channels[] = {
	{
		/* Proximity sensor channel */
		.type = IIO_PROXIMITY,
		.address = APDS9160_REG_PS_DATA_LSB,
		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_INT_TIME) |
					    BIT(IIO_CHAN_INFO_SCALE) |
					    BIT(IIO_CHAN_INFO_CALIBBIAS),
		.info_mask_separate_available = BIT(IIO_CHAN_INFO_INT_TIME) |
						BIT(IIO_CHAN_INFO_SCALE),
		.event_spec = apds9160_event_spec,
		.num_event_specs = ARRAY_SIZE(apds9160_event_spec),
	},
	{
		/* Proximity sensor led current */
		.type = IIO_CURRENT,
		.output = 1,
		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
		.info_mask_separate_available = BIT(IIO_CHAN_INFO_RAW),
	},
	{
		/* Illuminance */
		.type = IIO_LIGHT,
		.address = APDS9160_REG_LS_DATA_ALS_LSB,
		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_INT_TIME) |
					    BIT(IIO_CHAN_INFO_HARDWAREGAIN) |
					    BIT(IIO_CHAN_INFO_SCALE),
		.info_mask_separate_available = BIT(IIO_CHAN_INFO_INT_TIME) |
						BIT(IIO_CHAN_INFO_SCALE),
		.event_spec = apds9160_event_spec,
		.num_event_specs = ARRAY_SIZE(apds9160_event_spec),
	},
	{
		/* Clear channel */
		.type = IIO_INTENSITY,
		.address = APDS9160_REG_LS_DATA_CLEAR_LSB,
		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
		.channel2 = IIO_MOD_LIGHT_CLEAR,
		.modified = 1,
	},
};

static const struct iio_chan_spec apds9160_channels_without_events[] = {
	{
		/* Proximity sensor channel */
		.type = IIO_PROXIMITY,
		.address = APDS9160_REG_PS_DATA_LSB,
		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_INT_TIME) |
					    BIT(IIO_CHAN_INFO_SCALE) |
					    BIT(IIO_CHAN_INFO_CALIBBIAS),
		.info_mask_separate_available = BIT(IIO_CHAN_INFO_INT_TIME) |
						BIT(IIO_CHAN_INFO_SCALE),
	},
	{
		/* Proximity sensor led current */
		.type = IIO_CURRENT,
		.output = 1,
		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
		.info_mask_separate_available = BIT(IIO_CHAN_INFO_RAW),
	},
	{
		/* Illuminance */
		.type = IIO_LIGHT,
		.address = APDS9160_REG_LS_DATA_ALS_LSB,
		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_INT_TIME) |
					    BIT(IIO_CHAN_INFO_HARDWAREGAIN) |
					    BIT(IIO_CHAN_INFO_SCALE),
		.info_mask_separate_available = BIT(IIO_CHAN_INFO_INT_TIME) |
						BIT(IIO_CHAN_INFO_SCALE),
	},
	{
		/* Clear channel */
		.type = IIO_INTENSITY,
		.address = APDS9160_REG_LS_DATA_CLEAR_LSB,
		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
		.channel2 = IIO_MOD_LIGHT_CLEAR,
		.modified = 1,
	},
};

static const int apds9160_als_rate_avail[] = {
	25, 50, 100, 200
};

static const int apds9160_als_rate_map[][2] = {
	{ 25, 0x00 },
	{ 50, 0x01 },
	{ 100, 0x02 },
	{ 200, 0x03 },
};

static const int apds9160_als_gain_map[][2] = {
	{ 1, 0x00 },
	{ 3, 0x01 },
	{ 6, 0x02 },
	{ 18, 0x03 },
	{ 54, 0x04 },
};

static const int apds9160_ps_gain_avail[] = {
	1, 2, 4, 8
};

static const int apds9160_ps_gain_map[][2] = {
	{ 1, 0x00 },
	{ 2, 0x01 },
	{ 4, 0x02 },
	{ 8, 0x03 },
};

static const int apds9160_ps_rate_avail[] = {
	25, 50, 100, 200, 400
};

static const int apds9160_ps_rate_map[][2] = {
	{ 25, 0x03 },
	{ 50, 0x04 },
	{ 100, 0x05 },
	{ 200, 0x06 },
	{ 400, 0x07 },
};

static const int apds9160_ps_led_current_avail[] = {
	10, 25, 50, 100, 150, 175, 200
};

static const int apds9160_ps_led_current_map[][2] = {
	{ 10, 0x00 },
	{ 25, 0x01 },
	{ 50, 0x02 },
	{ 100, 0x03 },
	{ 150, 0x04 },
	{ 175, 0x05 },
	{ 200, 0x06 },
};

/**
 * struct apds9160_scale - apds9160 scale mapping definition
 *
 * @itime: Integration time in ms
 * @gain: Gain multiplier
 * @scale1: lux/count resolution
 * @scale2: micro lux/count
 */
struct apds9160_scale {
	int itime;
	int gain;
	int scale1;
	int scale2;
};

/* Scale mapping extracted from datasheet */
static const struct apds9160_scale apds9160_als_scale_map[] = {
	{
		.itime = 25,
		.gain = 1,
		.scale1 = 3,
		.scale2 = 272000,
	},
	{
		.itime = 25,
		.gain = 3,
		.scale1 = 1,
		.scale2 = 77000,
	},
	{
		.itime = 25,
		.gain = 6,
		.scale1 = 0,
		.scale2 = 525000,
	},
	{
		.itime = 25,
		.gain = 18,
		.scale1 = 0,
		.scale2 = 169000,
	},
	{
		.itime = 25,
		.gain = 54,
		.scale1 = 0,
		.scale2 = 49000,
	},
	{
		.itime = 50,
		.gain = 1,
		.scale1 = 1,
		.scale2 = 639000,
	},
	{
		.itime = 50,
		.gain = 3,
		.scale1 = 0,
		.scale2 = 538000,
	},
	{
		.itime = 50,
		.gain = 6,
		.scale1 = 0,
		.scale2 = 263000,
	},
	{
		.itime = 50,
		.gain = 18,
		.scale1 = 0,
		.scale2 = 84000,
	},
	{
		.itime = 50,
		.gain = 54,
		.scale1 = 0,
		.scale2 = 25000,
	},
	{
		.itime = 100,
		.gain = 1,
		.scale1 = 0,
		.scale2 = 819000,
	},
	{
		.itime = 100,
		.gain = 3,
		.scale1 = 0,
		.scale2 = 269000,
	},
	{
		.itime = 100,
		.gain = 6,
		.scale1 = 0,
		.scale2 = 131000,
	},
	{
		.itime = 100,
		.gain = 18,
		.scale1 = 0,
		.scale2 = 42000,
	},
	{
		.itime = 100,
		.gain = 54,
		.scale1 = 0,
		.scale2 = 12000,
	},
	{
		.itime = 200,
		.gain = 1,
		.scale1 = 0,
		.scale2 = 409000,
	},
	{
		.itime = 200,
		.gain = 3,
		.scale1 = 0,
		.scale2 = 135000,
	},
	{
		.itime = 200,
		.gain = 6,
		.scale1 = 0,
		.scale2 = 66000,
	},
	{
		.itime = 200,
		.gain = 18,
		.scale1 = 0,
		.scale2 = 21000,
	},
	{
		.itime = 200,
		.gain = 54,
		.scale1 = 0,
		.scale2 = 6000,
	},
};

static const int apds9160_25ms_avail[][2] = {
	{ 3, 272000 },
	{ 1, 77000 },
	{ 0, 525000 },
	{ 0, 169000 },
	{ 0, 49000 },
};

static const int apds9160_50ms_avail[][2] = {
	{ 1, 639000 },
	{ 0, 538000 },
	{ 0, 263000 },
	{ 0, 84000 },
	{ 0, 25000 },
};

static const int apds9160_100ms_avail[][2] = {
	{ 0, 819000 },
	{ 0, 269000 },
	{ 0, 131000 },
	{ 0, 42000 },
	{ 0, 12000 },
};

static const int apds9160_200ms_avail[][2] = {
	{ 0, 409000 },
	{ 0, 135000 },
	{ 0, 66000 },
	{ 0, 21000 },
	{ 0, 6000 },
};

static const struct reg_field apds9160_reg_field_ls_en =
	REG_FIELD(APDS9160_REG_CTRL, 1, 1);

static const struct reg_field apds9160_reg_field_ps_en =
	REG_FIELD(APDS9160_REG_CTRL, 0, 0);

static const struct reg_field apds9160_reg_field_int_ps =
	REG_FIELD(APDS9160_REG_INT_CFG, 0, 0);

static const struct reg_field apds9160_reg_field_int_als =
	REG_FIELD(APDS9160_REG_INT_CFG, 2, 2);

static const struct reg_field apds9160_reg_field_ps_overflow =
	REG_FIELD(APDS9160_REG_PS_DATA_MSB, 3, 3);

static const struct reg_field apds9160_reg_field_als_rate =
	REG_FIELD(APDS9160_REG_LS_MEAS_RATE, 0, 2);

static const struct reg_field apds9160_reg_field_als_gain =
	REG_FIELD(APDS9160_REG_LS_GAIN, 0, 2);

static const struct reg_field apds9160_reg_field_ps_rate =
	REG_FIELD(APDS9160_REG_PS_MEAS_RATE, 0, 2);

static const struct reg_field apds9160_reg_field_als_res =
	REG_FIELD(APDS9160_REG_LS_MEAS_RATE, 4, 6);

static const struct reg_field apds9160_reg_field_ps_current =
	REG_FIELD(APDS9160_REG_PS_LED, 0, 2);

static const struct reg_field apds9160_reg_field_ps_gain =
	REG_FIELD(APDS9160_REG_PS_MEAS_RATE, 6, 7);

static const struct reg_field apds9160_reg_field_ps_resolution =
	REG_FIELD(APDS9160_REG_PS_MEAS_RATE, 3, 4);

struct apds9160_chip {
	struct i2c_client *client;
	struct regmap *regmap;

	struct regmap_field *reg_enable_ps;
	struct regmap_field *reg_enable_als;
	struct regmap_field *reg_int_ps;
	struct regmap_field *reg_int_als;
	struct regmap_field *reg_ps_overflow;
	struct regmap_field *reg_als_rate;
	struct regmap_field *reg_als_resolution;
	struct regmap_field *reg_ps_rate;
	struct regmap_field *reg_als_gain;
	struct regmap_field *reg_ps_current;
	struct regmap_field *reg_ps_gain;
	struct regmap_field *reg_ps_resolution;

	struct mutex lock; /* protects state and config data */

	/* State data */
	int als_int;
	int ps_int;

	/* Configuration values */
	int als_itime;
	int als_hwgain;
	int als_scale1;
	int als_scale2;
	int ps_rate;
	int ps_cancellation_level;
	int ps_current;
	int ps_gain;
};

static int apds9160_set_ps_rate(struct apds9160_chip *data, int val)
{
	int idx;

	for (idx = 0; idx < ARRAY_SIZE(apds9160_ps_rate_map); idx++) {
		int ret;

		if (apds9160_ps_rate_map[idx][0] != val)
			continue;

		ret = regmap_field_write(data->reg_ps_rate,
					apds9160_ps_rate_map[idx][1]);
		if (ret)
			return ret;
		data->ps_rate = val;

		return ret;
	}

	return -EINVAL;
}

static int apds9160_set_ps_gain(struct apds9160_chip *data, int val)
{
	int idx;

	for (idx = 0; idx < ARRAY_SIZE(apds9160_ps_gain_map); idx++) {
		int ret;

		if (apds9160_ps_gain_map[idx][0] != val)
			continue;

		ret = regmap_field_write(data->reg_ps_gain,
					apds9160_ps_gain_map[idx][1]);
		if (ret)
			return ret;
		data->ps_gain = val;

		return ret;
	}

	return -EINVAL;
}

/*
 * The PS intelligent cancellation level register allows
 * for an on-chip substraction of the ADC count caused by
 * unwanted reflected light from PS ADC output.
 */
static int apds9160_set_ps_cancellation_level(struct apds9160_chip *data,
					      int val)
{
	int ret;
	__le16 buf;

	if (val < 0 || val > 0xFFFF)
		return -EINVAL;

	buf = cpu_to_le16(val);
	ret = regmap_bulk_write(data->regmap, APDS9160_REG_PS_CAN_LEVEL_DIG_LSB,
				&buf, 2);
	if (ret)
		return ret;

	data->ps_cancellation_level = val;

	return ret;
}

/*
 * This parameter determines the cancellation pulse duration
 * in each of the PWM pulse. The cancellation is applied during the
 * integration phase of the PS measurement.
 * Duration is programmed in half clock cycles
 * A duration value of 0 or 1 will not generate any cancellation pulse
 */
static int apds9160_set_ps_analog_cancellation(struct apds9160_chip *data,
					       int val)
{
	if (val < 0 || val > 63)
		return -EINVAL;

	return regmap_write(data->regmap, APDS9160_REG_PS_CAN_LEVEL_ANA_DUR,
			   val);
}

/*
 * This parameter works in conjunction with the cancellation pulse duration
 * The value determines the current used for crosstalk cancellation
 * Coarse value is in steps of 60 nA
 * Fine value is in steps of 2.4 nA
 */
static int apds9160_set_ps_cancellation_current(struct apds9160_chip *data,
						int coarse_val,
						int fine_val)
{
	int val;

	if (coarse_val < 0 || coarse_val > 4)
		return -EINVAL;

	if (fine_val < 0 || fine_val > 15)
		return -EINVAL;

	/* Coarse value at B4:B5 and fine value at B0:B3 */
	val = (coarse_val << 4) | fine_val;

	return regmap_write(data->regmap, APDS9160_REG_PS_CAN_LEVEL_ANA_CURRENT,
			    val);
}

static int apds9160_ps_init_analog_cancellation(struct device *dev,
						struct apds9160_chip *data)
{
	int ret, duration, picoamp, idx, coarse, fine;

	ret = device_property_read_u32(dev,
			"ps-cancellation-duration", &duration);
	if (ret || duration == 0) {
		/* Don't fail since this is not required */
		return 0;
	}

	ret = device_property_read_u32(dev,
			"ps-cancellation-current-picoamp", &picoamp);
	if (ret)
		return ret;

	if (picoamp < 60000 || picoamp > 276000 || picoamp % 2400 != 0)
		return dev_err_probe(dev, -EINVAL,
					"Invalid cancellation current\n");

	/* Compute required coarse and fine value from requested current */
	fine = 0;
	coarse = 0;
	for (idx = 60000; idx < picoamp; idx += 2400) {
		if (fine == 15) {
			fine = 0;
			coarse++;
			idx += 21600;
		} else {
			fine++;
		}
	}

	if (picoamp != idx)
		dev_warn(dev,
			"Invalid cancellation current %i, rounding to %i\n",
			picoamp, idx);

	ret = apds9160_set_ps_analog_cancellation(data, duration);
	if (ret)
		return ret;

	return apds9160_set_ps_cancellation_current(data, coarse, fine);
}

static int apds9160_set_ps_current(struct apds9160_chip *data, int val)
{
	int idx;

	for (idx = 0; idx < ARRAY_SIZE(apds9160_ps_led_current_map); idx++) {
		int ret;

		if (apds9160_ps_led_current_map[idx][0] != val)
			continue;

		ret = regmap_field_write(
				data->reg_ps_current,
				apds9160_ps_led_current_map[idx][1]);
		if (ret)
			return ret;
		data->ps_current = val;

		return ret;
	}

	return -EINVAL;
}

static int apds9160_set_als_gain(struct apds9160_chip *data, int gain)
{
	int idx;

	for (idx = 0; idx < ARRAY_SIZE(apds9160_als_gain_map); idx++) {
		int ret;

		if (gain != apds9160_als_gain_map[idx][0])
			continue;

		ret = regmap_field_write(data->reg_als_gain,
				apds9160_als_gain_map[idx][1]);
		if (ret)
			return ret;
		data->als_hwgain = gain;

		return ret;
	}

	return -EINVAL;
}

static int apds9160_set_als_scale(struct apds9160_chip *data, int val, int val2)
{
	int idx;

	for (idx = 0; idx < ARRAY_SIZE(apds9160_als_scale_map); idx++) {
		if (apds9160_als_scale_map[idx].itime == data->als_itime &&
		    apds9160_als_scale_map[idx].scale1 == val &&
		    apds9160_als_scale_map[idx].scale2 == val2) {
			int ret = apds9160_set_als_gain(data,
					apds9160_als_scale_map[idx].gain);
			if (ret)
				return ret;
			data->als_scale1 = val;
			data->als_scale2 = val2;

			return ret;
		}
	}

	return -EINVAL;
}

static int apds9160_set_als_resolution(struct apds9160_chip *data, int val)
{
	switch (val) {
	case 25:
		return regmap_field_write(data->reg_als_resolution,
			APDS9160_CMD_LS_RESOLUTION_25MS);
	case 50:
		return regmap_field_write(data->reg_als_resolution,
			APDS9160_CMD_LS_RESOLUTION_50MS);
	case 200:
		return regmap_field_write(data->reg_als_resolution,
			APDS9160_CMD_LS_RESOLUTION_200MS);
	default:
		return regmap_field_write(data->reg_als_resolution,
			APDS9160_CMD_LS_RESOLUTION_100MS);
	}
}

static int apds9160_set_als_rate(struct apds9160_chip *data, int val)
{
	int idx;

	for (idx = 0; idx < ARRAY_SIZE(apds9160_als_rate_map); idx++) {
		if (apds9160_als_rate_map[idx][0] != val)
			continue;

		return regmap_field_write(data->reg_als_rate,
				apds9160_als_rate_map[idx][1]);
	}

	return -EINVAL;
}

/*
 * Setting the integration time ajusts resolution, rate, scale and gain
 */
static int apds9160_set_als_int_time(struct apds9160_chip *data, int val)
{
	int ret;
	int idx;

	ret = apds9160_set_als_rate(data, val);
	if (ret)
		return ret;

	/* Match resolution register with rate */
	ret = apds9160_set_als_resolution(data, val);
	if (ret)
		return ret;

	data->als_itime = val;

	/* Set the scale minimum gain */
	for (idx = 0; idx < ARRAY_SIZE(apds9160_als_scale_map); idx++) {
		if (data->als_itime != apds9160_als_scale_map[idx].itime)
			continue;

		return apds9160_set_als_scale(data,
				apds9160_als_scale_map[idx].scale1,
				apds9160_als_scale_map[idx].scale2);
	}

	return -EINVAL;
}

static int apds9160_read_avail(struct iio_dev *indio_dev,
			       struct iio_chan_spec const *chan,
			       const int **vals, int *type, int *length,
			       long mask)
{
	struct apds9160_chip *data = iio_priv(indio_dev);

	switch (mask) {
	case IIO_CHAN_INFO_INT_TIME:
		switch (chan->type) {
		case IIO_LIGHT:
			*length = ARRAY_SIZE(apds9160_als_rate_avail);
			*vals = (const int *)apds9160_als_rate_avail;
			*type = IIO_VAL_INT;

			return IIO_AVAIL_LIST;
		case IIO_PROXIMITY:
			*length = ARRAY_SIZE(apds9160_ps_rate_avail);
			*vals = (const int *)apds9160_ps_rate_avail;
			*type = IIO_VAL_INT;

			return IIO_AVAIL_LIST;
		default:
			return -EINVAL;
		}
	case IIO_CHAN_INFO_SCALE:
		switch (chan->type) {
		case IIO_PROXIMITY:
			*length = ARRAY_SIZE(apds9160_ps_gain_avail);
			*vals = (const int *)apds9160_ps_gain_avail;
			*type = IIO_VAL_INT;

			return IIO_AVAIL_LIST;
		case IIO_LIGHT:
			/* The available scales changes depending on itime */
			switch (data->als_itime) {
			case 25:
				*length = ARRAY_SIZE(apds9160_25ms_avail) * 2;
				*vals = (const int *)apds9160_25ms_avail;
				*type = IIO_VAL_INT_PLUS_MICRO;

				return IIO_AVAIL_LIST;
			case 50:
				*length = ARRAY_SIZE(apds9160_50ms_avail) * 2;
				*vals = (const int *)apds9160_50ms_avail;
				*type = IIO_VAL_INT_PLUS_MICRO;

				return IIO_AVAIL_LIST;
			case 100:
				*length = ARRAY_SIZE(apds9160_100ms_avail) * 2;
				*vals = (const int *)apds9160_100ms_avail;
				*type = IIO_VAL_INT_PLUS_MICRO;

				return IIO_AVAIL_LIST;
			case 200:
				*length = ARRAY_SIZE(apds9160_200ms_avail) * 2;
				*vals = (const int *)apds9160_200ms_avail;
				*type = IIO_VAL_INT_PLUS_MICRO;

				return IIO_AVAIL_LIST;
			default:
				return -EINVAL;
			}
		default:
			return -EINVAL;
		}
	case IIO_CHAN_INFO_RAW:
		switch (chan->type) {
		case IIO_CURRENT:
			*length = ARRAY_SIZE(apds9160_ps_led_current_avail);
			*vals = (const int *)apds9160_ps_led_current_avail;
			*type = IIO_VAL_INT;

			return IIO_AVAIL_LIST;
		default:
			return -EINVAL;
		}

	default:
		return -EINVAL;
	}
}

static int apds9160_write_raw_get_fmt(struct iio_dev *indio_dev,
				      struct iio_chan_spec const *chan,
				      long mask)
{
	switch (mask) {
	case IIO_CHAN_INFO_INT_TIME:
		return IIO_VAL_INT;
	case IIO_CHAN_INFO_CALIBBIAS:
		return IIO_VAL_INT;
	case IIO_CHAN_INFO_HARDWAREGAIN:
		return IIO_VAL_INT;
	case IIO_CHAN_INFO_RAW:
		return IIO_VAL_INT;
	case IIO_CHAN_INFO_SCALE:
		return IIO_VAL_INT_PLUS_MICRO;
	default:
		return -EINVAL;
	}
}

static int apds9160_read_raw(struct iio_dev *indio_dev,
			     struct iio_chan_spec const *chan, int *val,
			     int *val2, long mask)
{
	struct apds9160_chip *data = iio_priv(indio_dev);
	int ret;

	switch (mask) {
	case IIO_CHAN_INFO_RAW:
		switch (chan->type) {
		case IIO_PROXIMITY: {
			__le16 buf;

			ret = regmap_bulk_read(data->regmap, chan->address,
					       &buf, 2);
			if (ret)
				return ret;
			*val = le16_to_cpu(buf);
			/* Remove overflow bits from result */
			*val = FIELD_GET(APDS9160_PS_DATA_MASK, *val);

			return IIO_VAL_INT;
		}
		case IIO_LIGHT:
		case IIO_INTENSITY: {
			u8 buf[3];

			ret = regmap_bulk_read(data->regmap, chan->address,
					       &buf, 3);
			if (ret)
				return ret;
			*val = get_unaligned_le24(buf);

			return IIO_VAL_INT;
		}
		case IIO_CURRENT:
			*val = data->ps_current;

			return IIO_VAL_INT;
		default:
			return -EINVAL;
		}
	case IIO_CHAN_INFO_HARDWAREGAIN:
		switch (chan->type) {
		case IIO_LIGHT:
			*val = data->als_hwgain;

			return IIO_VAL_INT;
		default:
			return -EINVAL;
		}
	case IIO_CHAN_INFO_INT_TIME:
		switch (chan->type) {
		case IIO_PROXIMITY:
			*val = data->ps_rate;

			return IIO_VAL_INT;
		case IIO_LIGHT:
			*val = data->als_itime;

			return IIO_VAL_INT;
		default:
			return -EINVAL;
		}
	case IIO_CHAN_INFO_CALIBBIAS:
		switch (chan->type) {
		case IIO_PROXIMITY:
			*val = data->ps_cancellation_level;

			return IIO_VAL_INT;
		default:
			return -EINVAL;
		}
	case IIO_CHAN_INFO_SCALE:
		switch (chan->type) {
		case IIO_PROXIMITY:
			*val = data->ps_gain;

			return IIO_VAL_INT;
		case IIO_LIGHT:
			*val = data->als_scale1;
			*val2 = data->als_scale2;

			return IIO_VAL_INT_PLUS_MICRO;
		default:
			return -EINVAL;
		}
	default:
		return -EINVAL;
	}
};

static int apds9160_write_raw(struct iio_dev *indio_dev,
			      struct iio_chan_spec const *chan, int val,
			      int val2, long mask)
{
	struct apds9160_chip *data = iio_priv(indio_dev);

	guard(mutex)(&data->lock);

	switch (mask) {
	case IIO_CHAN_INFO_INT_TIME:
		if (val2 != 0)
			return -EINVAL;
		switch (chan->type) {
		case IIO_PROXIMITY:
			return apds9160_set_ps_rate(data, val);
		case IIO_LIGHT:
			return apds9160_set_als_int_time(data, val);
		default:
			return -EINVAL;
		}
	case IIO_CHAN_INFO_SCALE:
		switch (chan->type) {
		case IIO_PROXIMITY:
			return apds9160_set_ps_gain(data, val);
		case IIO_LIGHT:
			return apds9160_set_als_scale(data, val, val2);
		default:
			return -EINVAL;
		}
	case IIO_CHAN_INFO_CALIBBIAS:
		if (val2 != 0)
			return -EINVAL;
		switch (chan->type) {
		case IIO_PROXIMITY:
			return apds9160_set_ps_cancellation_level(data, val);
		default:
			return -EINVAL;
		}
	case IIO_CHAN_INFO_RAW:
		if (val2 != 0)
			return -EINVAL;
		switch (chan->type) {
		case IIO_CURRENT:
			return apds9160_set_ps_current(data, val);
		default:
			return -EINVAL;
		}
	default:
		return -EINVAL;
	}
}

static inline int apds9160_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 = APDS9160_REG_PS_THRES_HI_LSB;
			break;
		case IIO_LIGHT:
			*reg = APDS9160_REG_LS_THRES_UP_LSB;
			break;
		default:
			return -EINVAL;
		} break;
	case IIO_EV_DIR_FALLING:
		switch (chan->type) {
		case IIO_PROXIMITY:
			*reg = APDS9160_REG_PS_THRES_LO_LSB;
			break;
		case IIO_LIGHT:
			*reg = APDS9160_REG_LS_THRES_LO_LSB;
			break;
		default:
			return -EINVAL;
		}
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static int apds9160_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;
	int ret;
	struct apds9160_chip *data = iio_priv(indio_dev);

	if (info != IIO_EV_INFO_VALUE)
		return -EINVAL;

	ret = apds9160_get_thres_reg(chan, dir, &reg);
	if (ret < 0)
		return ret;

	switch (chan->type) {
	case IIO_PROXIMITY: {
		__le16 buf;

		ret = regmap_bulk_read(data->regmap, reg, &buf, 2);
		if (ret < 0)
			return ret;
		*val = le16_to_cpu(buf);
		return IIO_VAL_INT;
	}
	case IIO_LIGHT: {
		u8 buf[3];

		ret = regmap_bulk_read(data->regmap, reg, &buf, 3);
		if (ret < 0)
			return ret;
		*val = get_unaligned_le24(buf);
		return IIO_VAL_INT;
	}
	default:
		return -EINVAL;
	}
}

static int apds9160_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;
	int ret = 0;
	struct apds9160_chip *data = iio_priv(indio_dev);

	if (info != IIO_EV_INFO_VALUE)
		return -EINVAL;

	ret = apds9160_get_thres_reg(chan, dir, &reg);
	if (ret < 0)
		return ret;

	switch (chan->type) {
	case IIO_PROXIMITY: {
		__le16 buf;

		if (val < 0 || val > APDS9160_PS_THRES_MAX)
			return -EINVAL;

		buf = cpu_to_le16(val);
		return regmap_bulk_write(data->regmap, reg, &buf, 2);
	}
	case IIO_LIGHT: {
		u8 buf[3];

		if (val < 0 || val > APDS9160_LS_THRES_MAX)
			return -EINVAL;

		put_unaligned_le24(val, buf);
		return regmap_bulk_write(data->regmap, reg, &buf, 3);
	}
	default:
		return -EINVAL;
	}
}

static int apds9160_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 apds9160_chip *data = iio_priv(indio_dev);

	switch (chan->type) {
	case IIO_PROXIMITY:
		return data->ps_int;
	case IIO_LIGHT:
		return data->als_int;
	default:
		return -EINVAL;
	}
}

static int apds9160_write_event_config(struct iio_dev *indio_dev,
				       const struct iio_chan_spec *chan,
				       enum iio_event_type type,
				       enum iio_event_direction dir, bool state)
{
	struct apds9160_chip *data = iio_priv(indio_dev);
	int ret;

	switch (chan->type) {
	case IIO_PROXIMITY:
		ret = regmap_field_write(data->reg_int_ps, state);
		if (ret)
			return ret;
		data->ps_int = state;

		return 0;
	case IIO_LIGHT:
		ret = regmap_field_write(data->reg_int_als, state);
		if (ret)
			return ret;
		data->als_int = state;

		return 0;
	default:
		return -EINVAL;
	}
}

static irqreturn_t apds9160_irq_handler(int irq, void *private)
{
	struct iio_dev *indio_dev = private;
	struct apds9160_chip *data = iio_priv(indio_dev);
	int ret, status;

	/* Reading status register clears the interrupt flag */
	ret = regmap_read(data->regmap, APDS9160_REG_SR, &status);
	if (ret < 0) {
		dev_err_ratelimited(&data->client->dev,
				    "irq status reg read failed\n");
		return IRQ_HANDLED;
	}

	if ((status & APDS9160_SR_LS_INT) &&
	    (status & APDS9160_SR_LS_NEW_DATA) && data->als_int) {
		iio_push_event(indio_dev,
			       IIO_UNMOD_EVENT_CODE(IIO_LIGHT, 0,
						    IIO_EV_TYPE_THRESH,
						    IIO_EV_DIR_EITHER),
			       iio_get_time_ns(indio_dev));
	}

	if ((status & APDS9160_SR_PS_INT) &&
	    (status & APDS9160_SR_PS_NEW_DATA) && data->ps_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(indio_dev));
	}

	return IRQ_HANDLED;
}

static int apds9160_detect(struct apds9160_chip *chip)
{
	struct i2c_client *client = chip->client;
	int ret;
	u32 val;

	ret = regmap_read(chip->regmap, APDS9160_REG_ID, &val);
	if (ret < 0) {
		dev_err(&client->dev, "ID read failed\n");
		return ret;
	}

	if (val != APDS9160_PART_ID_0)
		dev_info(&client->dev, "Unknown part id %u\n", val);

	return 0;
}

static void apds9160_disable(void *chip)
{
	struct apds9160_chip *data = chip;
	int ret;

	ret = regmap_field_write(data->reg_enable_als, 0);
	if (ret)
		return;

	regmap_field_write(data->reg_enable_ps, 0);
}

static int apds9160_chip_init(struct apds9160_chip *chip)
{
	int ret;

	/* Write default values to interrupt register */
	ret = regmap_field_write(chip->reg_int_ps, 0);
	chip->ps_int = 0;
	if (ret)
		return ret;

	ret = regmap_field_write(chip->reg_int_als, 0);
	chip->als_int = 0;
	if (ret)
		return ret;

	/* Write default values to control register */
	ret = regmap_field_write(chip->reg_enable_als, 1);
	if (ret)
		return ret;

	ret = regmap_field_write(chip->reg_enable_ps, 1);
	if (ret)
		return ret;

	/* Write other default values */
	ret = regmap_field_write(chip->reg_ps_resolution,
				 APDS9160_DEFAULT_PS_RESOLUTION_11BITS);
	if (ret)
		return ret;

	/* Write default values to configuration registers */
	ret = apds9160_set_ps_current(chip, APDS9160_DEFAULT_PS_CURRENT);
	if (ret)
		return ret;

	ret = apds9160_set_ps_rate(chip, APDS9160_DEFAULT_PS_RATE);
	if (ret)
		return ret;

	ret = apds9160_set_als_int_time(chip, APDS9160_DEFAULT_LS_RATE);
	if (ret)
		return ret;

	ret = apds9160_set_als_scale(chip,
				     apds9160_100ms_avail[0][0],
				     apds9160_100ms_avail[0][1]);
	if (ret)
		return ret;

	ret = apds9160_set_ps_gain(chip, APDS9160_DEFAULT_PS_GAIN);
	if (ret)
		return ret;

	ret = apds9160_set_ps_analog_cancellation(
		chip, APDS9160_DEFAULT_PS_ANALOG_CANCELLATION);
	if (ret)
		return ret;

	ret = apds9160_set_ps_cancellation_level(
		chip, APDS9160_DEFAULT_PS_CANCELLATION_LEVEL);
	if (ret)
		return ret;

	return devm_add_action_or_reset(&chip->client->dev, apds9160_disable,
					chip);
}

static int apds9160_regfield_init(struct apds9160_chip *data)
{
	struct device *dev = &data->client->dev;
	struct regmap *regmap = data->regmap;
	struct regmap_field *tmp;

	tmp = devm_regmap_field_alloc(dev, regmap, apds9160_reg_field_int_als);
	if (IS_ERR(tmp))
		return PTR_ERR(tmp);
	data->reg_int_als = tmp;

	tmp = devm_regmap_field_alloc(dev, regmap, apds9160_reg_field_int_ps);
	if (IS_ERR(tmp))
		return PTR_ERR(tmp);
	data->reg_int_ps = tmp;

	tmp = devm_regmap_field_alloc(dev, regmap, apds9160_reg_field_ls_en);
	if (IS_ERR(tmp))
		return PTR_ERR(tmp);
	data->reg_enable_als = tmp;

	tmp = devm_regmap_field_alloc(dev, regmap, apds9160_reg_field_ps_en);
	if (IS_ERR(tmp))
		return PTR_ERR(tmp);
	data->reg_enable_ps = tmp;

	tmp = devm_regmap_field_alloc(dev, regmap,
				      apds9160_reg_field_ps_overflow);
	if (IS_ERR(tmp))
		return PTR_ERR(tmp);
	data->reg_ps_overflow = tmp;

	tmp = devm_regmap_field_alloc(dev, regmap, apds9160_reg_field_als_rate);
	if (IS_ERR(tmp))
		return PTR_ERR(tmp);
	data->reg_als_rate = tmp;

	tmp = devm_regmap_field_alloc(dev, regmap, apds9160_reg_field_als_res);
	if (IS_ERR(tmp))
		return PTR_ERR(tmp);
	data->reg_als_resolution = tmp;

	tmp = devm_regmap_field_alloc(dev, regmap, apds9160_reg_field_ps_rate);
	if (IS_ERR(tmp))
		return PTR_ERR(tmp);
	data->reg_ps_rate = tmp;

	tmp = devm_regmap_field_alloc(dev, regmap, apds9160_reg_field_als_gain);
	if (IS_ERR(tmp))
		return PTR_ERR(tmp);
	data->reg_als_gain = tmp;

	tmp = devm_regmap_field_alloc(dev, regmap,
				      apds9160_reg_field_ps_current);
	if (IS_ERR(tmp))
		return PTR_ERR(tmp);
	data->reg_ps_current = tmp;

	tmp = devm_regmap_field_alloc(dev, regmap, apds9160_reg_field_ps_gain);
	if (IS_ERR(tmp))
		return PTR_ERR(tmp);
	data->reg_ps_gain = tmp;

	tmp = devm_regmap_field_alloc(dev, regmap,
				      apds9160_reg_field_ps_resolution);
	if (IS_ERR(tmp))
		return PTR_ERR(tmp);
	data->reg_ps_resolution = tmp;

	return 0;
}

static const struct iio_info apds9160_info = {
	.read_avail = apds9160_read_avail,
	.read_raw = apds9160_read_raw,
	.write_raw = apds9160_write_raw,
	.write_raw_get_fmt = apds9160_write_raw_get_fmt,
	.read_event_value = apds9160_read_event,
	.write_event_value = apds9160_write_event,
	.read_event_config = apds9160_read_event_config,
	.write_event_config = apds9160_write_event_config,
};

static const struct iio_info apds9160_info_no_events = {
	.read_avail = apds9160_read_avail,
	.read_raw = apds9160_read_raw,
	.write_raw = apds9160_write_raw,
	.write_raw_get_fmt = apds9160_write_raw_get_fmt,
};

static int apds9160_probe(struct i2c_client *client)
{
	struct device *dev = &client->dev;
	struct apds9160_chip *chip;
	struct iio_dev *indio_dev;
	int ret;

	indio_dev = devm_iio_device_alloc(dev, sizeof(*chip));
	if (!indio_dev)
		return -ENOMEM;

	ret = devm_regulator_get_enable(dev, "vdd");
	if (ret)
		return dev_err_probe(dev, ret, "Failed to enable vdd supply\n");

	indio_dev->name = "apds9160";
	indio_dev->modes = INDIO_DIRECT_MODE;

	chip = iio_priv(indio_dev);
	chip->client = client;
	chip->regmap = devm_regmap_init_i2c(client, &apds9160_regmap_config);
	if (IS_ERR(chip->regmap))
		return dev_err_probe(dev, PTR_ERR(chip->regmap),
				     "regmap initialization failed.\n");

	chip->client = client;
	mutex_init(&chip->lock);

	ret = apds9160_detect(chip);
	if (ret < 0)
		return dev_err_probe(dev, ret, "apds9160 not found\n");

	ret = apds9160_regfield_init(chip);
	if (ret)
		return ret;

	ret = apds9160_chip_init(chip);
	if (ret)
		return ret;

	ret = apds9160_ps_init_analog_cancellation(dev, chip);
	if (ret)
		return ret;

	if (client->irq > 0) {
		indio_dev->info = &apds9160_info;
		indio_dev->channels = apds9160_channels;
		indio_dev->num_channels = ARRAY_SIZE(apds9160_channels);
		ret = devm_request_threaded_irq(dev, client->irq, NULL,
						apds9160_irq_handler,
						IRQF_ONESHOT, "apds9160_event",
						indio_dev);
		if (ret) {
			return dev_err_probe(dev, ret,
					     "request irq (%d) failed\n",
					     client->irq);
		}
	} else {
		indio_dev->info = &apds9160_info_no_events;
		indio_dev->channels = apds9160_channels_without_events;
		indio_dev->num_channels =
			ARRAY_SIZE(apds9160_channels_without_events);
	}

	ret = devm_iio_device_register(dev, indio_dev);
	if (ret)
		return dev_err_probe(dev, ret,
				     "failed iio device registration\n");

	return ret;
}

static const struct of_device_id apds9160_of_match[] = {
	{ .compatible = "brcm,apds9160" },
	{ }
};
MODULE_DEVICE_TABLE(of, apds9160_of_match);

static const struct i2c_device_id apds9160_id[] = {
	{ "apds9160", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, apds9160_id);

static struct i2c_driver apds9160_driver = {
	.driver	  = {
		.name	= "apds9160",
		.of_match_table = apds9160_of_match,
	},
	.probe    = apds9160_probe,
	.id_table = apds9160_id,
};
module_i2c_driver(apds9160_driver);

MODULE_DESCRIPTION("APDS9160 combined ALS and proximity sensor");
MODULE_AUTHOR("Mikael Gonella-Bolduc <m.gonella.bolduc@gmail.com>");
MODULE_LICENSE("GPL");