[linux-2.6-block.git] / drivers / iio / light / vcnl4000.c

/*
 * vcnl4000.c - Support for Vishay VCNL4000/4010/4020/4200 combined ambient
 * light and proximity sensor
 *
 * Copyright 2012 Peter Meerwald <pmeerw@pmeerw.net>
 *
 * This file is subject to the terms and conditions of version 2 of
 * the GNU General Public License.  See the file COPYING in the main
 * directory of this archive for more details.
 *
 * IIO driver for:
 *   VCNL4000/10/20 (7-bit I2C slave address 0x13)
 *   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, 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 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 */

/* 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,
	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 },
	{ "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;

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

	if ((ret & 0xff) != VCNL4200_PROD_ID)
		return -ENODEV;

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

	/* Set defaults and enable both channels */
	ret = i2c_smbus_write_byte_data(data->client, VCNL4200_AL_CONF, 0x00);
	if (ret < 0)
		return ret;
	ret = i2c_smbus_write_byte_data(data->client, VCNL4200_PS_CONF1, 0x00);
	if (ret < 0)
		return ret;

	data->al_scale = 24000;
	data->vcnl4200_al.reg = VCNL4200_AL_DATA;
	data->vcnl4200_ps.reg = VCNL4200_PS_DATA;
	/* 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);
	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,
	},
	[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 struct i2c_driver vcnl4000_driver = {
	.driver = {
		.name   = VCNL4000_DRV_NAME,
	},
	.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");
Commit	Line	Data
62a1efb9	1	/*
be38866f	2	* vcnl4000.c - Support for Vishay VCNL4000/4010/4020/4200 combined ambient
d978bfdd	3	* light and proximity sensor
62a1efb9 PM	4	*
	5	* Copyright 2012 Peter Meerwald <pmeerw@pmeerw.net>
	6	*
	7	* This file is subject to the terms and conditions of version 2 of
	8	* the GNU General Public License. See the file COPYING in the main
	9	* directory of this archive for more details.
	10	*
be38866f TN	11	* IIO driver for:
	12	* VCNL4000/10/20 (7-bit I2C slave address 0x13)
	13	* VCNL4200 (7-bit I2C slave address 0x51)
62a1efb9 PM	14	*
	15	* TODO:
	16	* allow to adjust IR current
	17	* proximity threshold and event handling
d978bfdd	18	* periodic ALS/proximity measurement (VCNL4010/20)
be38866f	19	* interrupts (VCNL4010/20, VCNL4200)
62a1efb9 PM	20	*/
	21
	22	#include <linux/module.h>
	23	#include <linux/i2c.h>
	24	#include <linux/err.h>
	25	#include <linux/delay.h>
	26
	27	#include <linux/iio/iio.h>
	28	#include <linux/iio/sysfs.h>
	29
	30	#define VCNL4000_DRV_NAME "vcnl4000"
1ebc787a TN	31	#define VCNL4000_PROD_ID 0x01
1ebc787a TN	32	#define VCNL4010_PROD_ID 0x02 /* for VCNL4020, VCNL4010 */
be38866f	33	#define VCNL4200_PROD_ID 0x58
62a1efb9 PM	34
	35	#define VCNL4000_COMMAND 0x80 /* Command register */
	36	#define VCNL4000_PROD_REV 0x81 /* Product ID and Revision ID */
	37	#define VCNL4000_LED_CURRENT 0x83 /* IR LED current for proximity mode */
	38	#define VCNL4000_AL_PARAM 0x84 /* Ambient light parameter register */
	39	#define VCNL4000_AL_RESULT_HI 0x85 /* Ambient light result register, MSB */
	40	#define VCNL4000_AL_RESULT_LO 0x86 /* Ambient light result register, LSB */
	41	#define VCNL4000_PS_RESULT_HI 0x87 /* Proximity result register, MSB */
	42	#define VCNL4000_PS_RESULT_LO 0x88 /* Proximity result register, LSB */
	43	#define VCNL4000_PS_MEAS_FREQ 0x89 /* Proximity test signal frequency */
	44	#define VCNL4000_PS_MOD_ADJ 0x8a /* Proximity modulator timing adjustment */
	45
be38866f TN	46	#define VCNL4200_AL_CONF 0x00 /* Ambient light configuration */
	47	#define VCNL4200_PS_CONF1 0x03 /* Proximity configuration */
	48	#define VCNL4200_PS_DATA 0x08 /* Proximity data */
	49	#define VCNL4200_AL_DATA 0x09 /* Ambient light data */
	50	#define VCNL4200_DEV_ID 0x0e /* Device ID, slave address and version */
	51
62a1efb9	52	/* Bit masks for COMMAND register */
ff6a5259 PMS	53	#define VCNL4000_AL_RDY BIT(6) /* ALS data ready? */
	54	#define VCNL4000_PS_RDY BIT(5) /* proximity data ready? */
	55	#define VCNL4000_AL_OD BIT(4) /* start on-demand ALS measurement */
	56	#define VCNL4000_PS_OD BIT(3) /* start on-demand proximity measurement */
62a1efb9	57
1ebc787a TN	58	enum vcnl4000_device_ids {
1ebc787a TN	59	VCNL4000,
50c50b97	60	VCNL4010,
be38866f TN	61	VCNL4200,
	62	};
	63
	64	struct vcnl4200_channel {
	65	u8 reg;
	66	ktime_t last_measurement;
	67	ktime_t sampling_rate;
	68	struct mutex lock;
1ebc787a TN	69	};
1ebc787a TN	70
62a1efb9 PM	71	struct vcnl4000_data {
62a1efb9 PM	72	struct i2c_client *client;
1ebc787a TN	73	enum vcnl4000_device_ids id;
	74	int rev;
	75	int al_scale;
	76	const struct vcnl4000_chip_spec *chip_spec;
be38866f TN	77	struct mutex vcnl4000_lock;
	78	struct vcnl4200_channel vcnl4200_al;
	79	struct vcnl4200_channel vcnl4200_ps;
62a1efb9 PM	80	};
62a1efb9 PM	81
1ebc787a TN	82	struct vcnl4000_chip_spec {
	83	const char *prod;
	84	int (init)(struct vcnl4000_data data);
	85	int (measure_light)(struct vcnl4000_data data, int *val);
	86	int (measure_proximity)(struct vcnl4000_data data, int *val);
	87	};
	88
62a1efb9	89	static const struct i2c_device_id vcnl4000_id[] = {
1ebc787a	90	{ "vcnl4000", VCNL4000 },
50c50b97 TN	91	{ "vcnl4010", VCNL4010 },
50c50b97 TN	92	{ "vcnl4020", VCNL4010 },
be38866f	93	{ "vcnl4200", VCNL4200 },
62a1efb9 PM	94	{ }
	95	};
	96	MODULE_DEVICE_TABLE(i2c, vcnl4000_id);
	97
1ebc787a TN	98	static int vcnl4000_init(struct vcnl4000_data *data)
	99	{
	100	int ret, prod_id;
	101
	102	ret = i2c_smbus_read_byte_data(data->client, VCNL4000_PROD_REV);
	103	if (ret < 0)
	104	return ret;
	105
	106	prod_id = ret >> 4;
58bf9ace TN	107	switch (prod_id) {
	108	case VCNL4000_PROD_ID:
	109	if (data->id != VCNL4000)
	110	dev_warn(&data->client->dev,
	111	"wrong device id, use vcnl4000");
	112	break;
	113	case VCNL4010_PROD_ID:
	114	if (data->id != VCNL4010)
	115	dev_warn(&data->client->dev,
	116	"wrong device id, use vcnl4010/4020");
	117	break;
	118	default:
1ebc787a	119	return -ENODEV;
58bf9ace	120	}
1ebc787a TN	121
	122	data->rev = ret & 0xf;
	123	data->al_scale = 250000;
be38866f TN	124	mutex_init(&data->vcnl4000_lock);
	125
	126	return 0;
	127	};
	128
	129	static int vcnl4200_init(struct vcnl4000_data *data)
	130	{
	131	int ret;
	132
	133	ret = i2c_smbus_read_word_data(data->client, VCNL4200_DEV_ID);
	134	if (ret < 0)
	135	return ret;
	136
	137	if ((ret & 0xff) != VCNL4200_PROD_ID)
	138	return -ENODEV;
	139
	140	data->rev = (ret >> 8) & 0xf;
	141
	142	/* Set defaults and enable both channels */
	143	ret = i2c_smbus_write_byte_data(data->client, VCNL4200_AL_CONF, 0x00);
	144	if (ret < 0)
	145	return ret;
	146	ret = i2c_smbus_write_byte_data(data->client, VCNL4200_PS_CONF1, 0x00);
	147	if (ret < 0)
	148	return ret;
	149
	150	data->al_scale = 24000;
	151	data->vcnl4200_al.reg = VCNL4200_AL_DATA;
	152	data->vcnl4200_ps.reg = VCNL4200_PS_DATA;
	153	/* Integration time is 50ms, but the experiments show 54ms in total. */
	154	data->vcnl4200_al.sampling_rate = ktime_set(0, 54000 * 1000);
	155	data->vcnl4200_ps.sampling_rate = ktime_set(0, 4200 * 1000);
	156	data->vcnl4200_al.last_measurement = ktime_set(0, 0);
	157	data->vcnl4200_ps.last_measurement = ktime_set(0, 0);
	158	mutex_init(&data->vcnl4200_al.lock);
	159	mutex_init(&data->vcnl4200_ps.lock);
1ebc787a TN	160
	161	return 0;
	162	};
	163
62a1efb9 PM	164	static int vcnl4000_measure(struct vcnl4000_data *data, u8 req_mask,
	165	u8 rdy_mask, u8 data_reg, int *val)
	166	{
	167	int tries = 20;
91f197e0	168	__be16 buf;
62a1efb9 PM	169	int ret;
62a1efb9 PM	170
be38866f	171	mutex_lock(&data->vcnl4000_lock);
ff34ed6d	172
62a1efb9 PM	173	ret = i2c_smbus_write_byte_data(data->client, VCNL4000_COMMAND,
	174	req_mask);
	175	if (ret < 0)
ff34ed6d	176	goto fail;
62a1efb9 PM	177
	178	/* wait for data to become ready */
	179	while (tries--) {
	180	ret = i2c_smbus_read_byte_data(data->client, VCNL4000_COMMAND);
	181	if (ret < 0)
ff34ed6d	182	goto fail;
62a1efb9 PM	183	if (ret & rdy_mask)
	184	break;
	185	msleep(20); /* measurement takes up to 100 ms */
	186	}
	187
	188	if (tries < 0) {
	189	dev_err(&data->client->dev,
	190	"vcnl4000_measure() failed, data not ready\n");
ff34ed6d PMS	191	ret = -EIO;
ff34ed6d PMS	192	goto fail;
62a1efb9 PM	193	}
	194
	195	ret = i2c_smbus_read_i2c_block_data(data->client,
	196	data_reg, sizeof(buf), (u8 *) &buf);
	197	if (ret < 0)
ff34ed6d	198	goto fail;
62a1efb9	199
be38866f	200	mutex_unlock(&data->vcnl4000_lock);
62a1efb9 PM	201	*val = be16_to_cpu(buf);
	202
	203	return 0;
ff34ed6d PMS	204
ff34ed6d PMS	205	fail:
be38866f	206	mutex_unlock(&data->vcnl4000_lock);
ff34ed6d	207	return ret;
62a1efb9 PM	208	}
62a1efb9 PM	209
be38866f TN	210	static int vcnl4200_measure(struct vcnl4000_data *data,
	211	struct vcnl4200_channel chan, int val)
	212	{
	213	int ret;
	214	s64 delta;
	215	ktime_t next_measurement;
	216
	217	mutex_lock(&chan->lock);
	218
	219	next_measurement = ktime_add(chan->last_measurement,
	220	chan->sampling_rate);
	221	delta = ktime_us_delta(next_measurement, ktime_get());
	222	if (delta > 0)
	223	usleep_range(delta, delta + 500);
	224	chan->last_measurement = ktime_get();
	225
	226	mutex_unlock(&chan->lock);
	227
	228	ret = i2c_smbus_read_word_data(data->client, chan->reg);
	229	if (ret < 0)
	230	return ret;
	231
	232	*val = ret;
	233
	234	return 0;
	235	}
	236
1ebc787a TN	237	static int vcnl4000_measure_light(struct vcnl4000_data data, int val)
	238	{
	239	return vcnl4000_measure(data,
	240	VCNL4000_AL_OD, VCNL4000_AL_RDY,
	241	VCNL4000_AL_RESULT_HI, val);
	242	}
	243
be38866f TN	244	static int vcnl4200_measure_light(struct vcnl4000_data data, int val)
	245	{
	246	return vcnl4200_measure(data, &data->vcnl4200_al, val);
	247	}
	248
1ebc787a TN	249	static int vcnl4000_measure_proximity(struct vcnl4000_data data, int val)
	250	{
	251	return vcnl4000_measure(data,
	252	VCNL4000_PS_OD, VCNL4000_PS_RDY,
	253	VCNL4000_PS_RESULT_HI, val);
	254	}
	255
be38866f TN	256	static int vcnl4200_measure_proximity(struct vcnl4000_data data, int val)
	257	{
	258	return vcnl4200_measure(data, &data->vcnl4200_ps, val);
	259	}
	260
1ebc787a TN	261	static const struct vcnl4000_chip_spec vcnl4000_chip_spec_cfg[] = {
	262	[VCNL4000] = {
	263	.prod = "VCNL4000",
	264	.init = vcnl4000_init,
	265	.measure_light = vcnl4000_measure_light,
	266	.measure_proximity = vcnl4000_measure_proximity,
	267	},
50c50b97 TN	268	[VCNL4010] = {
	269	.prod = "VCNL4010/4020",
	270	.init = vcnl4000_init,
	271	.measure_light = vcnl4000_measure_light,
	272	.measure_proximity = vcnl4000_measure_proximity,
	273	},
be38866f TN	274	[VCNL4200] = {
	275	.prod = "VCNL4200",
	276	.init = vcnl4200_init,
	277	.measure_light = vcnl4200_measure_light,
	278	.measure_proximity = vcnl4200_measure_proximity,
	279	},
1ebc787a TN	280	};
1ebc787a TN	281
62a1efb9 PM	282	static const struct iio_chan_spec vcnl4000_channels[] = {
	283	{
	284	.type = IIO_LIGHT,
bb7c5940 JC	285	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) \|
bb7c5940 JC	286	BIT(IIO_CHAN_INFO_SCALE),
62a1efb9 PM	287	}, {
62a1efb9 PM	288	.type = IIO_PROXIMITY,
bb7c5940	289	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
62a1efb9 PM	290	}
	291	};
	292
	293	static int vcnl4000_read_raw(struct iio_dev *indio_dev,
	294	struct iio_chan_spec const *chan,
	295	int val, int val2, long mask)
	296	{
5d693139	297	int ret;
62a1efb9 PM	298	struct vcnl4000_data *data = iio_priv(indio_dev);
	299
	300	switch (mask) {
	301	case IIO_CHAN_INFO_RAW:
	302	switch (chan->type) {
	303	case IIO_LIGHT:
1ebc787a	304	ret = data->chip_spec->measure_light(data, val);
62a1efb9 PM	305	if (ret < 0)
62a1efb9 PM	306	return ret;
5d693139	307	return IIO_VAL_INT;
62a1efb9	308	case IIO_PROXIMITY:
1ebc787a	309	ret = data->chip_spec->measure_proximity(data, val);
62a1efb9 PM	310	if (ret < 0)
62a1efb9 PM	311	return ret;
5d693139	312	return IIO_VAL_INT;
62a1efb9	313	default:
5d693139	314	return -EINVAL;
62a1efb9	315	}
62a1efb9	316	case IIO_CHAN_INFO_SCALE:
5d693139 PMS	317	if (chan->type != IIO_LIGHT)
	318	return -EINVAL;
	319
	320	*val = 0;
1ebc787a	321	*val2 = data->al_scale;
5d693139	322	return IIO_VAL_INT_PLUS_MICRO;
62a1efb9	323	default:
5d693139	324	return -EINVAL;
62a1efb9	325	}
62a1efb9 PM	326	}
	327
	328	static const struct iio_info vcnl4000_info = {
	329	.read_raw = vcnl4000_read_raw,
62a1efb9 PM	330	};
62a1efb9 PM	331
fc52692c GKH	332	static int vcnl4000_probe(struct i2c_client *client,
fc52692c GKH	333	const struct i2c_device_id *id)
62a1efb9 PM	334	{
	335	struct vcnl4000_data *data;
	336	struct iio_dev *indio_dev;
1ebc787a	337	int ret;
62a1efb9	338
2669d723	339	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
62a1efb9 PM	340	if (!indio_dev)
	341	return -ENOMEM;
	342
	343	data = iio_priv(indio_dev);
	344	i2c_set_clientdata(client, indio_dev);
	345	data->client = client;
1ebc787a TN	346	data->id = id->driver_data;
1ebc787a TN	347	data->chip_spec = &vcnl4000_chip_spec_cfg[data->id];
62a1efb9	348
1ebc787a	349	ret = data->chip_spec->init(data);
62a1efb9	350	if (ret < 0)
2669d723	351	return ret;
62a1efb9	352
d978bfdd	353	dev_dbg(&client->dev, "%s Ambient light/proximity sensor, Rev: %02x\n",
1ebc787a	354	data->chip_spec->prod, data->rev);
62a1efb9 PM	355
	356	indio_dev->dev.parent = &client->dev;
	357	indio_dev->info = &vcnl4000_info;
	358	indio_dev->channels = vcnl4000_channels;
	359	indio_dev->num_channels = ARRAY_SIZE(vcnl4000_channels);
	360	indio_dev->name = VCNL4000_DRV_NAME;
	361	indio_dev->modes = INDIO_DIRECT_MODE;
	362
691dab42	363	return devm_iio_device_register(&client->dev, indio_dev);
62a1efb9 PM	364	}
	365
	366	static struct i2c_driver vcnl4000_driver = {
	367	.driver = {
	368	.name = VCNL4000_DRV_NAME,
62a1efb9 PM	369	},
62a1efb9 PM	370	.probe = vcnl4000_probe,
62a1efb9 PM	371	.id_table = vcnl4000_id,
	372	};
	373
	374	module_i2c_driver(vcnl4000_driver);
	375
	376	MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
	377	MODULE_DESCRIPTION("Vishay VCNL4000 proximity/ambient light sensor driver");
	378	MODULE_LICENSE("GPL");