drivers/iio/light/vcnl4000.c - linux/kernel/git/gregkh/usb - Git at Google

 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * vcnl4000.c - Support for Vishay VCNL4000/4010/4020/4040/4200 combined ambient
  * light and proximity sensor
  *
  * Copyright 2012 Peter Meerwald <pmeerw@pmeerw.net>
  * Copyright 2019 Pursim SPC
  *
  * IIO driver for:
  *   VCNL4000/10/20 (7-bit I2C slave address 0x13)
  *   VCNL4040 (7-bit I2C slave address 0x60)
  *   VCNL4200 (7-bit I2C slave address 0x51)
  *
  * TODO:
  *   allow to adjust IR current
  *   proximity threshold and event handling
  *   periodic ALS/proximity measurement (VCNL4010/20)
  *   interrupts (VCNL4010/20/40, VCNL4200)
  */

 #include <linux/module.h>
 #include <linux/i2c.h>
 #include <linux/err.h>
 #include <linux/delay.h>

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

 #define VCNL4000_DRV_NAME "vcnl4000"
 #define VCNL4000_PROD_ID	0x01
 #define VCNL4010_PROD_ID	0x02 /* for VCNL4020, VCNL4010 */
 #define VCNL4040_PROD_ID	0x86
 #define VCNL4200_PROD_ID	0x58

 #define VCNL4000_COMMAND	0x80 /* Command register */
 #define VCNL4000_PROD_REV	0x81 /* Product ID and Revision ID */
 #define VCNL4000_LED_CURRENT	0x83 /* IR LED current for proximity mode */
 #define VCNL4000_AL_PARAM	0x84 /* Ambient light parameter register */
 #define VCNL4000_AL_RESULT_HI	0x85 /* Ambient light result register, MSB */
 #define VCNL4000_AL_RESULT_LO	0x86 /* Ambient light result register, LSB */
 #define VCNL4000_PS_RESULT_HI	0x87 /* Proximity result register, MSB */
 #define VCNL4000_PS_RESULT_LO	0x88 /* Proximity result register, LSB */
 #define VCNL4000_PS_MEAS_FREQ	0x89 /* Proximity test signal frequency */
 #define VCNL4000_PS_MOD_ADJ	0x8a /* Proximity modulator timing adjustment */

 #define VCNL4200_AL_CONF	0x00 /* Ambient light configuration */
 #define VCNL4200_PS_CONF1	0x03 /* Proximity configuration */
 #define VCNL4200_PS_DATA	0x08 /* Proximity data */
 #define VCNL4200_AL_DATA	0x09 /* Ambient light data */
 #define VCNL4200_DEV_ID		0x0e /* Device ID, slave address and version */

 #define VCNL4040_DEV_ID		0x0c /* Device ID and version */

 /* Bit masks for COMMAND register */
 #define VCNL4000_AL_RDY		BIT(6) /* ALS data ready? */
 #define VCNL4000_PS_RDY		BIT(5) /* proximity data ready? */
 #define VCNL4000_AL_OD		BIT(4) /* start on-demand ALS measurement */
 #define VCNL4000_PS_OD		BIT(3) /* start on-demand proximity measurement */

 enum vcnl4000_device_ids {
 	VCNL4000,
 	VCNL4010,
 	VCNL4040,
 	VCNL4200,
 };

 struct vcnl4200_channel {
 	u8 reg;
 	ktime_t last_measurement;
 	ktime_t sampling_rate;
 	struct mutex lock;
 };

 struct vcnl4000_data {
 	struct i2c_client *client;
 	enum vcnl4000_device_ids id;
 	int rev;
 	int al_scale;
 	const struct vcnl4000_chip_spec *chip_spec;
 	struct mutex vcnl4000_lock;
 	struct vcnl4200_channel vcnl4200_al;
 	struct vcnl4200_channel vcnl4200_ps;
 };

 struct vcnl4000_chip_spec {
 	const char *prod;
 	int (*init)(struct vcnl4000_data *data);
 	int (*measure_light)(struct vcnl4000_data *data, int *val);
 	int (*measure_proximity)(struct vcnl4000_data *data, int *val);
 };

 static const struct i2c_device_id vcnl4000_id[] = {
 	{ "vcnl4000", VCNL4000 },
 	{ "vcnl4010", VCNL4010 },
 	{ "vcnl4020", VCNL4010 },
 	{ "vcnl4040", VCNL4040 },
 	{ "vcnl4200", VCNL4200 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, vcnl4000_id);

 static int vcnl4000_init(struct vcnl4000_data *data)
 {
 	int ret, prod_id;

 	ret = i2c_smbus_read_byte_data(data->client, VCNL4000_PROD_REV);
 	if (ret < 0)
 		return ret;

 	prod_id = ret >> 4;
 	switch (prod_id) {
 	case VCNL4000_PROD_ID:
 		if (data->id != VCNL4000)
 			dev_warn(&data->client->dev,
 					"wrong device id, use vcnl4000");
 		break;
 	case VCNL4010_PROD_ID:
 		if (data->id != VCNL4010)
 			dev_warn(&data->client->dev,
 					"wrong device id, use vcnl4010/4020");
 		break;
 	default:
 		return -ENODEV;
 	}

 	data->rev = ret & 0xf;
 	data->al_scale = 250000;
 	mutex_init(&data->vcnl4000_lock);

 	return 0;
 };

 static int vcnl4200_init(struct vcnl4000_data *data)
 {
 	int ret, id;

 	ret = i2c_smbus_read_word_data(data->client, VCNL4200_DEV_ID);
 	if (ret < 0)
 		return ret;

 	id = ret & 0xff;

 	if (id != VCNL4200_PROD_ID) {
 		ret = i2c_smbus_read_word_data(data->client, VCNL4040_DEV_ID);
 		if (ret < 0)
 			return ret;

 		id = ret & 0xff;

 		if (id != VCNL4040_PROD_ID)
 			return -ENODEV;
 	}

 	dev_dbg(&data->client->dev, "device id 0x%x", id);

 	data->rev = (ret >> 8) & 0xf;

 	/* Set defaults and enable both channels */
 	ret = i2c_smbus_write_word_data(data->client, VCNL4200_AL_CONF, 0);
 	if (ret < 0)
 		return ret;
 	ret = i2c_smbus_write_word_data(data->client, VCNL4200_PS_CONF1, 0);
 	if (ret < 0)
 		return ret;

 	data->al_scale = 24000;
 	data->vcnl4200_al.reg = VCNL4200_AL_DATA;
 	data->vcnl4200_ps.reg = VCNL4200_PS_DATA;
 	switch (id) {
 	case VCNL4200_PROD_ID:
 		/* Integration time is 50ms, but the experiments */
 		/* show 54ms in total. */
 		data->vcnl4200_al.sampling_rate = ktime_set(0, 54000 * 1000);
 		data->vcnl4200_ps.sampling_rate = ktime_set(0, 4200 * 1000);
 		break;
 	case VCNL4040_PROD_ID:
 		/* Integration time is 80ms, add 10ms. */
 		data->vcnl4200_al.sampling_rate = ktime_set(0, 100000 * 1000);
 		data->vcnl4200_ps.sampling_rate = ktime_set(0, 100000 * 1000);
 		break;
 	}
 	data->vcnl4200_al.last_measurement = ktime_set(0, 0);
 	data->vcnl4200_ps.last_measurement = ktime_set(0, 0);
 	mutex_init(&data->vcnl4200_al.lock);
 	mutex_init(&data->vcnl4200_ps.lock);

 	return 0;
 };

 static int vcnl4000_measure(struct vcnl4000_data *data, u8 req_mask,
 				u8 rdy_mask, u8 data_reg, int *val)
 {
 	int tries = 20;
 	__be16 buf;
 	int ret;

 	mutex_lock(&data->vcnl4000_lock);

 	ret = i2c_smbus_write_byte_data(data->client, VCNL4000_COMMAND,
 					req_mask);
 	if (ret < 0)
 		goto fail;

 	/* wait for data to become ready */
 	while (tries--) {
 		ret = i2c_smbus_read_byte_data(data->client, VCNL4000_COMMAND);
 		if (ret < 0)
 			goto fail;
 		if (ret & rdy_mask)
 			break;
 		msleep(20); /* measurement takes up to 100 ms */
 	}

 	if (tries < 0) {
 		dev_err(&data->client->dev,
 			"vcnl4000_measure() failed, data not ready\n");
 		ret = -EIO;
 		goto fail;
 	}

 	ret = i2c_smbus_read_i2c_block_data(data->client,
 		data_reg, sizeof(buf), (u8 *) &buf);
 	if (ret < 0)
 		goto fail;

 	mutex_unlock(&data->vcnl4000_lock);
 	*val = be16_to_cpu(buf);

 	return 0;

 fail:
 	mutex_unlock(&data->vcnl4000_lock);
 	return ret;
 }

 static int vcnl4200_measure(struct vcnl4000_data *data,
 		struct vcnl4200_channel *chan, int *val)
 {
 	int ret;
 	s64 delta;
 	ktime_t next_measurement;

 	mutex_lock(&chan->lock);

 	next_measurement = ktime_add(chan->last_measurement,
 			chan->sampling_rate);
 	delta = ktime_us_delta(next_measurement, ktime_get());
 	if (delta > 0)
 		usleep_range(delta, delta + 500);
 	chan->last_measurement = ktime_get();

 	mutex_unlock(&chan->lock);

 	ret = i2c_smbus_read_word_data(data->client, chan->reg);
 	if (ret < 0)
 		return ret;

 	*val = ret;

 	return 0;
 }

 static int vcnl4000_measure_light(struct vcnl4000_data *data, int *val)
 {
 	return vcnl4000_measure(data,
 			VCNL4000_AL_OD, VCNL4000_AL_RDY,
 			VCNL4000_AL_RESULT_HI, val);
 }

 static int vcnl4200_measure_light(struct vcnl4000_data *data, int *val)
 {
 	return vcnl4200_measure(data, &data->vcnl4200_al, val);
 }

 static int vcnl4000_measure_proximity(struct vcnl4000_data *data, int *val)
 {
 	return vcnl4000_measure(data,
 			VCNL4000_PS_OD, VCNL4000_PS_RDY,
 			VCNL4000_PS_RESULT_HI, val);
 }

 static int vcnl4200_measure_proximity(struct vcnl4000_data *data, int *val)
 {
 	return vcnl4200_measure(data, &data->vcnl4200_ps, val);
 }

 static const struct vcnl4000_chip_spec vcnl4000_chip_spec_cfg[] = {
 	[VCNL4000] = {
 		.prod = "VCNL4000",
 		.init = vcnl4000_init,
 		.measure_light = vcnl4000_measure_light,
 		.measure_proximity = vcnl4000_measure_proximity,
 	},
 	[VCNL4010] = {
 		.prod = "VCNL4010/4020",
 		.init = vcnl4000_init,
 		.measure_light = vcnl4000_measure_light,
 		.measure_proximity = vcnl4000_measure_proximity,
 	},
 	[VCNL4040] = {
 		.prod = "VCNL4040",
 		.init = vcnl4200_init,
 		.measure_light = vcnl4200_measure_light,
 		.measure_proximity = vcnl4200_measure_proximity,
 	},
 	[VCNL4200] = {
 		.prod = "VCNL4200",
 		.init = vcnl4200_init,
 		.measure_light = vcnl4200_measure_light,
 		.measure_proximity = vcnl4200_measure_proximity,
 	},
 };

 static const struct iio_chan_spec vcnl4000_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 vcnl4000_read_raw(struct iio_dev *indio_dev,
 				struct iio_chan_spec const *chan,
 				int *val, int *val2, long mask)
 {
 	int ret;
 	struct vcnl4000_data *data = iio_priv(indio_dev);

 	switch (mask) {
 	case IIO_CHAN_INFO_RAW:
 		switch (chan->type) {
 		case IIO_LIGHT:
 			ret = data->chip_spec->measure_light(data, val);
 			if (ret < 0)
 				return ret;
 			return IIO_VAL_INT;
 		case IIO_PROXIMITY:
 			ret = data->chip_spec->measure_proximity(data, val);
 			if (ret < 0)
 				return ret;
 			return IIO_VAL_INT;
 		default:
 			return -EINVAL;
 		}
 	case IIO_CHAN_INFO_SCALE:
 		if (chan->type != IIO_LIGHT)
 			return -EINVAL;

 		*val = 0;
 		*val2 = data->al_scale;
 		return IIO_VAL_INT_PLUS_MICRO;
 	default:
 		return -EINVAL;
 	}
 }

 static const struct iio_info vcnl4000_info = {
 	.read_raw = vcnl4000_read_raw,
 };

 static int vcnl4000_probe(struct i2c_client *client,
 			  const struct i2c_device_id *id)
 {
 	struct vcnl4000_data *data;
 	struct iio_dev *indio_dev;
 	int ret;

 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
 	if (!indio_dev)
 		return -ENOMEM;

 	data = iio_priv(indio_dev);
 	i2c_set_clientdata(client, indio_dev);
 	data->client = client;
 	data->id = id->driver_data;
 	data->chip_spec = &vcnl4000_chip_spec_cfg[data->id];

 	ret = data->chip_spec->init(data);
 	if (ret < 0)
 		return ret;

 	dev_dbg(&client->dev, "%s Ambient light/proximity sensor, Rev: %02x\n",
 		data->chip_spec->prod, data->rev);

 	indio_dev->dev.parent = &client->dev;
 	indio_dev->info = &vcnl4000_info;
 	indio_dev->channels = vcnl4000_channels;
 	indio_dev->num_channels = ARRAY_SIZE(vcnl4000_channels);
 	indio_dev->name = VCNL4000_DRV_NAME;
 	indio_dev->modes = INDIO_DIRECT_MODE;

 	return devm_iio_device_register(&client->dev, indio_dev);
 }

 static const struct of_device_id vcnl_4000_of_match[] = {
 	{
 		.compatible = "vishay,vcnl4000",
 		.data = (void *)VCNL4000,
 	},
 	{
 		.compatible = "vishay,vcnl4010",
 		.data = (void *)VCNL4010,
 	},
 	{
 		.compatible = "vishay,vcnl4020",
 		.data = (void *)VCNL4010,
 	},
 	{
 		.compatible = "vishay,vcnl4040",
 		.data = (void *)VCNL4040,
 	},
 	{
 		.compatible = "vishay,vcnl4200",
 		.data = (void *)VCNL4200,
 	},
 	{},
 };
 MODULE_DEVICE_TABLE(of, vcnl_4000_of_match);

 static struct i2c_driver vcnl4000_driver = {
 	.driver = {
 		.name   = VCNL4000_DRV_NAME,
 		.of_match_table = vcnl_4000_of_match,
 	},
 	.probe  = vcnl4000_probe,
 	.id_table = vcnl4000_id,
 };

 module_i2c_driver(vcnl4000_driver);

 MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
 MODULE_DESCRIPTION("Vishay VCNL4000 proximity/ambient light sensor driver");
 MODULE_LICENSE("GPL");
	// SPDX-License-Identifier: GPL-2.0-only
	/*
	* vcnl4000.c - Support for Vishay VCNL4000/4010/4020/4040/4200 combined ambient
	* light and proximity sensor
	*
	* Copyright 2012 Peter Meerwald <pmeerw@pmeerw.net>
	* Copyright 2019 Pursim SPC
	*
	* IIO driver for:
	* VCNL4000/10/20 (7-bit I2C slave address 0x13)
	* VCNL4040 (7-bit I2C slave address 0x60)
	* VCNL4200 (7-bit I2C slave address 0x51)
	*
	* TODO:
	* allow to adjust IR current
	* proximity threshold and event handling
	* periodic ALS/proximity measurement (VCNL4010/20)
	* interrupts (VCNL4010/20/40, VCNL4200)
	*/

	#include <linux/module.h>
	#include <linux/i2c.h>
	#include <linux/err.h>
	#include <linux/delay.h>

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

	#define VCNL4000_DRV_NAME "vcnl4000"
	#define VCNL4000_PROD_ID 0x01
	#define VCNL4010_PROD_ID 0x02 /* for VCNL4020, VCNL4010 */
	#define VCNL4040_PROD_ID 0x86
	#define VCNL4200_PROD_ID 0x58

	#define VCNL4000_COMMAND 0x80 /* Command register */
	#define VCNL4000_PROD_REV 0x81 /* Product ID and Revision ID */
	#define VCNL4000_LED_CURRENT 0x83 /* IR LED current for proximity mode */
	#define VCNL4000_AL_PARAM 0x84 /* Ambient light parameter register */
	#define VCNL4000_AL_RESULT_HI 0x85 /* Ambient light result register, MSB */
	#define VCNL4000_AL_RESULT_LO 0x86 /* Ambient light result register, LSB */
	#define VCNL4000_PS_RESULT_HI 0x87 /* Proximity result register, MSB */
	#define VCNL4000_PS_RESULT_LO 0x88 /* Proximity result register, LSB */
	#define VCNL4000_PS_MEAS_FREQ 0x89 /* Proximity test signal frequency */
	#define VCNL4000_PS_MOD_ADJ 0x8a /* Proximity modulator timing adjustment */

	#define VCNL4200_AL_CONF 0x00 /* Ambient light configuration */
	#define VCNL4200_PS_CONF1 0x03 /* Proximity configuration */
	#define VCNL4200_PS_DATA 0x08 /* Proximity data */
	#define VCNL4200_AL_DATA 0x09 /* Ambient light data */
	#define VCNL4200_DEV_ID 0x0e /* Device ID, slave address and version */

	#define VCNL4040_DEV_ID 0x0c /* Device ID and version */

	/* Bit masks for COMMAND register */
	#define VCNL4000_AL_RDY BIT(6) /* ALS data ready? */
	#define VCNL4000_PS_RDY BIT(5) /* proximity data ready? */
	#define VCNL4000_AL_OD BIT(4) /* start on-demand ALS measurement */
	#define VCNL4000_PS_OD BIT(3) /* start on-demand proximity measurement */

	enum vcnl4000_device_ids {
	VCNL4000,
	VCNL4010,
	VCNL4040,
	VCNL4200,
	};

	struct vcnl4200_channel {
	u8 reg;
	ktime_t last_measurement;
	ktime_t sampling_rate;
	struct mutex lock;
	};

	struct vcnl4000_data {
	struct i2c_client *client;
	enum vcnl4000_device_ids id;
	int rev;
	int al_scale;
	const struct vcnl4000_chip_spec *chip_spec;
	struct mutex vcnl4000_lock;
	struct vcnl4200_channel vcnl4200_al;
	struct vcnl4200_channel vcnl4200_ps;
	};

	struct vcnl4000_chip_spec {
	const char *prod;
	int (init)(struct vcnl4000_data data);
	int (measure_light)(struct vcnl4000_data data, int *val);
	int (measure_proximity)(struct vcnl4000_data data, int *val);
	};

	static const struct i2c_device_id vcnl4000_id[] = {
	{ "vcnl4000", VCNL4000 },
	{ "vcnl4010", VCNL4010 },
	{ "vcnl4020", VCNL4010 },
	{ "vcnl4040", VCNL4040 },
	{ "vcnl4200", VCNL4200 },
	{ }
	};
	MODULE_DEVICE_TABLE(i2c, vcnl4000_id);

	static int vcnl4000_init(struct vcnl4000_data *data)
	{
	int ret, prod_id;

	ret = i2c_smbus_read_byte_data(data->client, VCNL4000_PROD_REV);
	if (ret < 0)
	return ret;

	prod_id = ret >> 4;
	switch (prod_id) {
	case VCNL4000_PROD_ID:
	if (data->id != VCNL4000)
	dev_warn(&data->client->dev,
	"wrong device id, use vcnl4000");
	break;
	case VCNL4010_PROD_ID:
	if (data->id != VCNL4010)
	dev_warn(&data->client->dev,
	"wrong device id, use vcnl4010/4020");
	break;
	default:
	return -ENODEV;
	}

	data->rev = ret & 0xf;
	data->al_scale = 250000;
	mutex_init(&data->vcnl4000_lock);

	return 0;
	};

	static int vcnl4200_init(struct vcnl4000_data *data)
	{
	int ret, id;

	ret = i2c_smbus_read_word_data(data->client, VCNL4200_DEV_ID);
	if (ret < 0)
	return ret;

	id = ret & 0xff;

	if (id != VCNL4200_PROD_ID) {
	ret = i2c_smbus_read_word_data(data->client, VCNL4040_DEV_ID);
	if (ret < 0)
	return ret;

	id = ret & 0xff;

	if (id != VCNL4040_PROD_ID)
	return -ENODEV;
	}

	dev_dbg(&data->client->dev, "device id 0x%x", id);

	data->rev = (ret >> 8) & 0xf;

	/* Set defaults and enable both channels */
	ret = i2c_smbus_write_word_data(data->client, VCNL4200_AL_CONF, 0);
	if (ret < 0)
	return ret;
	ret = i2c_smbus_write_word_data(data->client, VCNL4200_PS_CONF1, 0);
	if (ret < 0)
	return ret;

	data->al_scale = 24000;
	data->vcnl4200_al.reg = VCNL4200_AL_DATA;
	data->vcnl4200_ps.reg = VCNL4200_PS_DATA;
	switch (id) {
	case VCNL4200_PROD_ID:
	/* Integration time is 50ms, but the experiments */
	/* show 54ms in total. */
	data->vcnl4200_al.sampling_rate = ktime_set(0, 54000 * 1000);
	data->vcnl4200_ps.sampling_rate = ktime_set(0, 4200 * 1000);
	break;
	case VCNL4040_PROD_ID:
	/* Integration time is 80ms, add 10ms. */
	data->vcnl4200_al.sampling_rate = ktime_set(0, 100000 * 1000);
	data->vcnl4200_ps.sampling_rate = ktime_set(0, 100000 * 1000);
	break;
	}
	data->vcnl4200_al.last_measurement = ktime_set(0, 0);
	data->vcnl4200_ps.last_measurement = ktime_set(0, 0);
	mutex_init(&data->vcnl4200_al.lock);
	mutex_init(&data->vcnl4200_ps.lock);

	return 0;
	};

	static int vcnl4000_measure(struct vcnl4000_data *data, u8 req_mask,
	u8 rdy_mask, u8 data_reg, int *val)
	{
	int tries = 20;
	__be16 buf;
	int ret;

	mutex_lock(&data->vcnl4000_lock);

	ret = i2c_smbus_write_byte_data(data->client, VCNL4000_COMMAND,
	req_mask);
	if (ret < 0)
	goto fail;

	/* wait for data to become ready */
	while (tries--) {
	ret = i2c_smbus_read_byte_data(data->client, VCNL4000_COMMAND);
	if (ret < 0)
	goto fail;
	if (ret & rdy_mask)
	break;
	msleep(20); /* measurement takes up to 100 ms */
	}

	if (tries < 0) {
	dev_err(&data->client->dev,
	"vcnl4000_measure() failed, data not ready\n");
	ret = -EIO;
	goto fail;
	}

	ret = i2c_smbus_read_i2c_block_data(data->client,
	data_reg, sizeof(buf), (u8 *) &buf);
	if (ret < 0)
	goto fail;

	mutex_unlock(&data->vcnl4000_lock);
	*val = be16_to_cpu(buf);

	return 0;

	fail:
	mutex_unlock(&data->vcnl4000_lock);
	return ret;
	}

	static int vcnl4200_measure(struct vcnl4000_data *data,
	struct vcnl4200_channel chan, int val)
	{
	int ret;
	s64 delta;
	ktime_t next_measurement;

	mutex_lock(&chan->lock);

	next_measurement = ktime_add(chan->last_measurement,
	chan->sampling_rate);
	delta = ktime_us_delta(next_measurement, ktime_get());
	if (delta > 0)
	usleep_range(delta, delta + 500);
	chan->last_measurement = ktime_get();

	mutex_unlock(&chan->lock);

	ret = i2c_smbus_read_word_data(data->client, chan->reg);
	if (ret < 0)
	return ret;

	*val = ret;

	return 0;
	}

	static int vcnl4000_measure_light(struct vcnl4000_data data, int val)
	{
	return vcnl4000_measure(data,
	VCNL4000_AL_OD, VCNL4000_AL_RDY,
	VCNL4000_AL_RESULT_HI, val);
	}

	static int vcnl4200_measure_light(struct vcnl4000_data data, int val)
	{
	return vcnl4200_measure(data, &data->vcnl4200_al, val);
	}

	static int vcnl4000_measure_proximity(struct vcnl4000_data data, int val)
	{
	return vcnl4000_measure(data,
	VCNL4000_PS_OD, VCNL4000_PS_RDY,
	VCNL4000_PS_RESULT_HI, val);
	}

	static int vcnl4200_measure_proximity(struct vcnl4000_data data, int val)
	{
	return vcnl4200_measure(data, &data->vcnl4200_ps, val);
	}

	static const struct vcnl4000_chip_spec vcnl4000_chip_spec_cfg[] = {
	[VCNL4000] = {
	.prod = "VCNL4000",
	.init = vcnl4000_init,
	.measure_light = vcnl4000_measure_light,
	.measure_proximity = vcnl4000_measure_proximity,
	},
	[VCNL4010] = {
	.prod = "VCNL4010/4020",
	.init = vcnl4000_init,
	.measure_light = vcnl4000_measure_light,
	.measure_proximity = vcnl4000_measure_proximity,
	},
	[VCNL4040] = {
	.prod = "VCNL4040",
	.init = vcnl4200_init,
	.measure_light = vcnl4200_measure_light,
	.measure_proximity = vcnl4200_measure_proximity,
	},
	[VCNL4200] = {
	.prod = "VCNL4200",
	.init = vcnl4200_init,
	.measure_light = vcnl4200_measure_light,
	.measure_proximity = vcnl4200_measure_proximity,
	},
	};

	static const struct iio_chan_spec vcnl4000_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 vcnl4000_read_raw(struct iio_dev *indio_dev,
	struct iio_chan_spec const *chan,
	int val, int val2, long mask)
	{
	int ret;
	struct vcnl4000_data *data = iio_priv(indio_dev);

	switch (mask) {
	case IIO_CHAN_INFO_RAW:
	switch (chan->type) {
	case IIO_LIGHT:
	ret = data->chip_spec->measure_light(data, val);
	if (ret < 0)
	return ret;
	return IIO_VAL_INT;
	case IIO_PROXIMITY:
	ret = data->chip_spec->measure_proximity(data, val);
	if (ret < 0)
	return ret;
	return IIO_VAL_INT;
	default:
	return -EINVAL;
	}
	case IIO_CHAN_INFO_SCALE:
	if (chan->type != IIO_LIGHT)
	return -EINVAL;

	*val = 0;
	*val2 = data->al_scale;
	return IIO_VAL_INT_PLUS_MICRO;
	default:
	return -EINVAL;
	}
	}

	static const struct iio_info vcnl4000_info = {
	.read_raw = vcnl4000_read_raw,
	};

	static int vcnl4000_probe(struct i2c_client *client,
	const struct i2c_device_id *id)
	{
	struct vcnl4000_data *data;
	struct iio_dev *indio_dev;
	int ret;

	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
	if (!indio_dev)
	return -ENOMEM;

	data = iio_priv(indio_dev);
	i2c_set_clientdata(client, indio_dev);
	data->client = client;
	data->id = id->driver_data;
	data->chip_spec = &vcnl4000_chip_spec_cfg[data->id];

	ret = data->chip_spec->init(data);
	if (ret < 0)
	return ret;

	dev_dbg(&client->dev, "%s Ambient light/proximity sensor, Rev: %02x\n",
	data->chip_spec->prod, data->rev);

	indio_dev->dev.parent = &client->dev;
	indio_dev->info = &vcnl4000_info;
	indio_dev->channels = vcnl4000_channels;
	indio_dev->num_channels = ARRAY_SIZE(vcnl4000_channels);
	indio_dev->name = VCNL4000_DRV_NAME;
	indio_dev->modes = INDIO_DIRECT_MODE;

	return devm_iio_device_register(&client->dev, indio_dev);
	}

	static const struct of_device_id vcnl_4000_of_match[] = {
	{
	.compatible = "vishay,vcnl4000",
	.data = (void *)VCNL4000,
	},
	{
	.compatible = "vishay,vcnl4010",
	.data = (void *)VCNL4010,
	},
	{
	.compatible = "vishay,vcnl4020",
	.data = (void *)VCNL4010,
	},
	{
	.compatible = "vishay,vcnl4040",
	.data = (void *)VCNL4040,
	},
	{
	.compatible = "vishay,vcnl4200",
	.data = (void *)VCNL4200,
	},
	{},
	};
	MODULE_DEVICE_TABLE(of, vcnl_4000_of_match);

	static struct i2c_driver vcnl4000_driver = {
	.driver = {
	.name = VCNL4000_DRV_NAME,
	.of_match_table = vcnl_4000_of_match,
	},
	.probe = vcnl4000_probe,
	.id_table = vcnl4000_id,
	};

	module_i2c_driver(vcnl4000_driver);

	MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
	MODULE_DESCRIPTION("Vishay VCNL4000 proximity/ambient light sensor driver");
	MODULE_LICENSE("GPL");