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Commit 55707294 authored by Parthiban Nallathambi's avatar Parthiban Nallathambi Committed by Jonathan Cameron
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iio: light: Add support for vishay vcnl4035 



Add support for VCNL4035, which is capable of Ambient light
sensing (ALS) and proximity function. This patch adds support
only for ALS function

Signed-off-by: default avatarParthiban Nallathambi <pn@denx.de>
Reviewed-by: default avatarAndy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent efeb87d8

drivers/iio/light/Kconfig

+13 −0
Original line number Diff line number Diff line
@@ -460,6 +460,19 @@ config VCNL4000 
	 To compile this driver as a module, choose M here: the

	 module will be called vcnl4000.



config VCNL4035

	tristate "VCNL4035 combined ALS and proximity sensor"

	select IIO_TRIGGERED_BUFFER

	select REGMAP_I2C

	depends on I2C

	help

	 Say Y here if you want to build a driver for the Vishay VCNL4035,

	 combined ambient light (ALS) and proximity sensor. Currently only ALS

	 function is available.



	 To compile this driver as a module, choose M here: the

	 module will be called vcnl4035.



config VEML6070

	tristate "VEML6070 UV A light sensor"

	depends on I2C

drivers/iio/light/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -45,6 +45,7 @@ obj-$(CONFIG_TSL2772) += tsl2772.o 
obj-$(CONFIG_TSL4531)		+= tsl4531.o

obj-$(CONFIG_US5182D)		+= us5182d.o

obj-$(CONFIG_VCNL4000)		+= vcnl4000.o

obj-$(CONFIG_VCNL4035)		+= vcnl4035.o

obj-$(CONFIG_VEML6070)		+= veml6070.o

obj-$(CONFIG_VL6180)		+= vl6180.o

obj-$(CONFIG_ZOPT2201)		+= zopt2201.o

drivers/iio/light/vcnl4035.c

0 → 100644
+676 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

/*

 * VCNL4035 Ambient Light and Proximity Sensor - 7-bit I2C slave address 0x60

 *

 * Copyright (c) 2018, DENX Software Engineering GmbH

 * Author: Parthiban Nallathambi <pn@denx.de>

 *

 * TODO: Proximity

 */

#include <linux/bitops.h>

#include <linux/i2c.h>

#include <linux/module.h>

#include <linux/pm_runtime.h>

#include <linux/regmap.h>



#include <linux/iio/buffer.h>

#include <linux/iio/events.h>

#include <linux/iio/iio.h>

#include <linux/iio/sysfs.h>

#include <linux/iio/trigger.h>

#include <linux/iio/trigger_consumer.h>

#include <linux/iio/triggered_buffer.h>



#define VCNL4035_DRV_NAME	"vcnl4035"

#define VCNL4035_IRQ_NAME	"vcnl4035_event"

#define VCNL4035_REGMAP_NAME	"vcnl4035_regmap"



/* Device registers */

#define VCNL4035_ALS_CONF	0x00

#define VCNL4035_ALS_THDH	0x01

#define VCNL4035_ALS_THDL	0x02

#define VCNL4035_ALS_DATA	0x0B

#define VCNL4035_WHITE_DATA	0x0C

#define VCNL4035_INT_FLAG	0x0D

#define VCNL4035_DEV_ID		0x0E



/* Register masks */

#define VCNL4035_MODE_ALS_MASK		BIT(0)

#define VCNL4035_MODE_ALS_WHITE_CHAN	BIT(8)

#define VCNL4035_MODE_ALS_INT_MASK	BIT(1)

#define VCNL4035_ALS_IT_MASK		GENMASK(7, 5)

#define VCNL4035_ALS_PERS_MASK		GENMASK(3, 2)

#define VCNL4035_INT_ALS_IF_H_MASK	BIT(12)

#define VCNL4035_INT_ALS_IF_L_MASK	BIT(13)



/* Default values */

#define VCNL4035_MODE_ALS_ENABLE	BIT(0)

#define VCNL4035_MODE_ALS_DISABLE	0x00

#define VCNL4035_MODE_ALS_INT_ENABLE	BIT(1)

#define VCNL4035_MODE_ALS_INT_DISABLE	0

#define VCNL4035_DEV_ID_VAL		0x80

#define VCNL4035_ALS_IT_DEFAULT		0x01

#define VCNL4035_ALS_PERS_DEFAULT	0x00

#define VCNL4035_ALS_THDH_DEFAULT	5000

#define VCNL4035_ALS_THDL_DEFAULT	100

#define VCNL4035_SLEEP_DELAY_MS		2000



struct vcnl4035_data {

	struct i2c_client *client;

	struct regmap *regmap;

	unsigned int als_it_val;

	unsigned int als_persistence;

	unsigned int als_thresh_low;

	unsigned int als_thresh_high;

	struct iio_trigger *drdy_trigger0;

};



static inline bool vcnl4035_is_triggered(struct vcnl4035_data *data)

{

	int ret;

	int reg;



	ret = regmap_read(data->regmap, VCNL4035_INT_FLAG, &reg);

	if (ret < 0)

		return false;



	return !!(reg &

		(VCNL4035_INT_ALS_IF_H_MASK | VCNL4035_INT_ALS_IF_L_MASK));

}



static irqreturn_t vcnl4035_drdy_irq_thread(int irq, void *private)

{

	struct iio_dev *indio_dev = private;

	struct vcnl4035_data *data = iio_priv(indio_dev);



	if (vcnl4035_is_triggered(data)) {

		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));

		iio_trigger_poll_chained(data->drdy_trigger0);

		return IRQ_HANDLED;

	}



	return IRQ_NONE;

}



/* Triggered buffer */

static irqreturn_t vcnl4035_trigger_consumer_handler(int irq, void *p)

{

	struct iio_poll_func *pf = p;

	struct iio_dev *indio_dev = pf->indio_dev;

	struct vcnl4035_data *data = iio_priv(indio_dev);

	u8 buffer[ALIGN(sizeof(u16), sizeof(s64)) + sizeof(s64)];

	int ret;



	ret = regmap_read(data->regmap, VCNL4035_ALS_DATA, (int *)buffer);

	if (ret < 0) {

		dev_err(&data->client->dev,

			"Trigger consumer can't read from sensor.\n");

		goto fail_read;

	}

	iio_push_to_buffers_with_timestamp(indio_dev, buffer,

					iio_get_time_ns(indio_dev));



fail_read:

	iio_trigger_notify_done(indio_dev->trig);



	return IRQ_HANDLED;

}



static int vcnl4035_als_drdy_set_state(struct iio_trigger *trigger,

					bool enable_drdy)

{

	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trigger);

	struct vcnl4035_data *data = iio_priv(indio_dev);

	int val = enable_drdy ? VCNL4035_MODE_ALS_INT_ENABLE :

					VCNL4035_MODE_ALS_INT_DISABLE;



	return regmap_update_bits(data->regmap, VCNL4035_ALS_CONF,

				 VCNL4035_MODE_ALS_INT_MASK,

				 val);

}



static const struct iio_trigger_ops vcnl4035_trigger_ops = {

	.validate_device = iio_trigger_validate_own_device,

	.set_trigger_state = vcnl4035_als_drdy_set_state,

};



static int vcnl4035_set_pm_runtime_state(struct vcnl4035_data *data, bool on)

{

	int ret;

	struct device *dev = &data->client->dev;



	if (on) {

		ret = pm_runtime_get_sync(dev);

		if (ret < 0)

			pm_runtime_put_noidle(dev);

	} else {

		pm_runtime_mark_last_busy(dev);

		ret = pm_runtime_put_autosuspend(dev);

	}



	return ret;

}



/*

 *	Device IT	INT Time (ms)	Scale (lux/step)

 *	000		50		0.064

 *	001		100		0.032

 *	010		200		0.016

 *	100		400		0.008

 *	101 - 111	800		0.004

 * Values are proportional, so ALS INT is selected for input due to

 * simplicity reason. Integration time value and scaling is

 * calculated based on device INT value

 *

 * Raw value needs to be scaled using ALS steps

 */

static int vcnl4035_read_raw(struct iio_dev *indio_dev,

			    struct iio_chan_spec const *chan, int *val,

			    int *val2, long mask)

{

	struct vcnl4035_data *data = iio_priv(indio_dev);

	int ret;

	int raw_data;

	unsigned int reg;



	switch (mask) {

	case IIO_CHAN_INFO_RAW:

		ret = vcnl4035_set_pm_runtime_state(data, true);

		if  (ret < 0)

			return ret;



		ret = iio_device_claim_direct_mode(indio_dev);

		if (!ret) {

			if (chan->channel)

				reg = VCNL4035_ALS_DATA;

			else

				reg = VCNL4035_WHITE_DATA;

			ret = regmap_read(data->regmap, reg, &raw_data);

			iio_device_release_direct_mode(indio_dev);

			if (!ret) {

				*val = raw_data;

				ret = IIO_VAL_INT;

			}

		}

		vcnl4035_set_pm_runtime_state(data, false);

		return ret;

	case IIO_CHAN_INFO_INT_TIME:

		*val = 50;

		if (data->als_it_val)

			*val = data->als_it_val * 100;

		return IIO_VAL_INT;

	case IIO_CHAN_INFO_SCALE:

		*val = 64;

		if (!data->als_it_val)

			*val2 = 1000;

		else

			*val2 = data->als_it_val * 2 * 1000;

		return IIO_VAL_FRACTIONAL;

	default:

		return -EINVAL;

	}

}



static int vcnl4035_write_raw(struct iio_dev *indio_dev,

				struct iio_chan_spec const *chan,

				int val, int val2, long mask)

{

	int ret;

	struct vcnl4035_data *data = iio_priv(indio_dev);



	switch (mask) {

	case IIO_CHAN_INFO_INT_TIME:

		if (val <= 0 || val > 800)

			return -EINVAL;



		ret = vcnl4035_set_pm_runtime_state(data, true);

		if  (ret < 0)

			return ret;



		ret = regmap_update_bits(data->regmap, VCNL4035_ALS_CONF,

					 VCNL4035_ALS_IT_MASK,

					 val / 100);

		if (!ret)

			data->als_it_val = val / 100;



		vcnl4035_set_pm_runtime_state(data, false);

		return ret;

	default:

		return -EINVAL;

	}

}



/* No direct ABI for persistence and threshold, so eventing */

static int vcnl4035_read_thresh(struct iio_dev *indio_dev,

		const struct iio_chan_spec *chan, enum iio_event_type type,

		enum iio_event_direction dir, enum iio_event_info info,

		int *val, int *val2)

{

	struct vcnl4035_data *data = iio_priv(indio_dev);



	switch (info) {

	case IIO_EV_INFO_VALUE:

		switch (dir) {

		case IIO_EV_DIR_RISING:

			*val = data->als_thresh_high;

			return IIO_VAL_INT;

		case IIO_EV_DIR_FALLING:

			*val = data->als_thresh_low;

			return IIO_VAL_INT;

		default:

			return -EINVAL;

		}

		break;

	case IIO_EV_INFO_PERIOD:

		*val = data->als_persistence;

		return IIO_VAL_INT;

	default:

		return -EINVAL;

	}



}



static int vcnl4035_write_thresh(struct iio_dev *indio_dev,

		const struct iio_chan_spec *chan, enum iio_event_type type,

		enum iio_event_direction dir, enum iio_event_info info, int val,

		int val2)

{

	struct vcnl4035_data *data = iio_priv(indio_dev);

	int ret;



	switch (info) {

	case IIO_EV_INFO_VALUE:

		/* 16 bit threshold range 0 - 65535 */

		if (val < 0 || val > 65535)

			return -EINVAL;

		if (dir == IIO_EV_DIR_RISING) {

			if (val < data->als_thresh_low)

				return -EINVAL;

			ret = regmap_write(data->regmap, VCNL4035_ALS_THDH,

					   val);

			if (ret)

				return ret;

			data->als_thresh_high = val;

		} else {

			if (val > data->als_thresh_high)

				return -EINVAL;

			ret = regmap_write(data->regmap, VCNL4035_ALS_THDL,

					   val);

			if (ret)

				return ret;

			data->als_thresh_low = val;

		}

		return ret;

	case IIO_EV_INFO_PERIOD:

		/* allow only 1 2 4 8 as persistence value */

		if (val < 0 || val > 8 || hweight8(val) != 1)

			return -EINVAL;

		ret = regmap_update_bits(data->regmap, VCNL4035_ALS_CONF,

					 VCNL4035_ALS_PERS_MASK, val);

		if (!ret)

			data->als_persistence = val;

		return ret;

	default:

		return -EINVAL;

	}

}



static IIO_CONST_ATTR_INT_TIME_AVAIL("50 100 200 400 800");



static struct attribute *vcnl4035_attributes[] = {

	&iio_const_attr_integration_time_available.dev_attr.attr,

	NULL,

};



static const struct attribute_group vcnl4035_attribute_group = {

	.attrs = vcnl4035_attributes,

};



static const struct iio_info vcnl4035_info = {

	.read_raw		= vcnl4035_read_raw,

	.write_raw		= vcnl4035_write_raw,

	.read_event_value	= vcnl4035_read_thresh,

	.write_event_value	= vcnl4035_write_thresh,

	.attrs			= &vcnl4035_attribute_group,

};



static const struct iio_event_spec vcnl4035_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_PERIOD),

	},

};



enum vcnl4035_scan_index_order {

	VCNL4035_CHAN_INDEX_LIGHT,

	VCNL4035_CHAN_INDEX_WHITE_LED,

};



static const struct iio_buffer_setup_ops iio_triggered_buffer_setup_ops = {

	.validate_scan_mask = &iio_validate_scan_mask_onehot,

};



static const struct iio_chan_spec vcnl4035_channels[] = {

	{

		.type = IIO_LIGHT,

		.channel = 0,

		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |

				BIT(IIO_CHAN_INFO_INT_TIME) |

				BIT(IIO_CHAN_INFO_SCALE),

		.event_spec = vcnl4035_event_spec,

		.num_event_specs = ARRAY_SIZE(vcnl4035_event_spec),

		.scan_index = VCNL4035_CHAN_INDEX_LIGHT,

		.scan_type = {

			.sign = 'u',

			.realbits = 16,

			.storagebits = 16,

			.endianness = IIO_LE,

		},

	},

	{

		.type = IIO_INTENSITY,

		.channel = 1,

		.modified = 1,

		.channel2 = IIO_MOD_LIGHT_BOTH,

		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),

		.scan_index = VCNL4035_CHAN_INDEX_WHITE_LED,

		.scan_type = {

			.sign = 'u',

			.realbits = 16,

			.storagebits = 16,

			.endianness = IIO_LE,

		},

	},

};



static int vcnl4035_set_als_power_state(struct vcnl4035_data *data, u8 status)

{

	return regmap_update_bits(data->regmap, VCNL4035_ALS_CONF,

					VCNL4035_MODE_ALS_MASK,

					status);

}



static int vcnl4035_init(struct vcnl4035_data *data)

{

	int ret;

	int id;



	ret = regmap_read(data->regmap, VCNL4035_DEV_ID, &id);

	if (ret < 0) {

		dev_err(&data->client->dev, "Failed to read DEV_ID register\n");

		return ret;

	}



	if (id != VCNL4035_DEV_ID_VAL) {

		dev_err(&data->client->dev, "Wrong id, got %x, expected %x\n",

			id, VCNL4035_DEV_ID_VAL);

		return -ENODEV;

	}



	ret = vcnl4035_set_als_power_state(data, VCNL4035_MODE_ALS_ENABLE);

	if (ret < 0)

		return ret;



	/* ALS white channel enable */

	ret = regmap_update_bits(data->regmap, VCNL4035_ALS_CONF,

				 VCNL4035_MODE_ALS_WHITE_CHAN,

				 1);

	if (ret) {

		dev_err(&data->client->dev, "set white channel enable %d\n",

			ret);

		return ret;

	}



	/* set default integration time - 100 ms for ALS */

	ret = regmap_update_bits(data->regmap, VCNL4035_ALS_CONF,

				 VCNL4035_ALS_IT_MASK,

				 VCNL4035_ALS_IT_DEFAULT);

	if (ret) {

		dev_err(&data->client->dev, "set default ALS IT returned %d\n",

			ret);

		return ret;

	}

	data->als_it_val = VCNL4035_ALS_IT_DEFAULT;



	/* set default persistence time - 1 for ALS */

	ret = regmap_update_bits(data->regmap, VCNL4035_ALS_CONF,

				 VCNL4035_ALS_PERS_MASK,

				 VCNL4035_ALS_PERS_DEFAULT);

	if (ret) {

		dev_err(&data->client->dev, "set default PERS returned %d\n",

			ret);

		return ret;

	}

	data->als_persistence = VCNL4035_ALS_PERS_DEFAULT;



	/* set default HIGH threshold for ALS */

	ret = regmap_write(data->regmap, VCNL4035_ALS_THDH,

				VCNL4035_ALS_THDH_DEFAULT);

	if (ret) {

		dev_err(&data->client->dev, "set default THDH returned %d\n",

			ret);

		return ret;

	}

	data->als_thresh_high = VCNL4035_ALS_THDH_DEFAULT;



	/* set default LOW threshold for ALS */

	ret = regmap_write(data->regmap, VCNL4035_ALS_THDL,

				VCNL4035_ALS_THDL_DEFAULT);

	if (ret) {

		dev_err(&data->client->dev, "set default THDL returned %d\n",

			ret);

		return ret;

	}

	data->als_thresh_low = VCNL4035_ALS_THDL_DEFAULT;



	return 0;

}



static bool vcnl4035_is_volatile_reg(struct device *dev, unsigned int reg)

{

	switch (reg) {

	case VCNL4035_ALS_CONF:

	case VCNL4035_DEV_ID:

		return false;

	default:

		return true;

	}

}



static const struct regmap_config vcnl4035_regmap_config = {

	.name		= VCNL4035_REGMAP_NAME,

	.reg_bits	= 8,

	.val_bits	= 16,

	.max_register	= VCNL4035_DEV_ID,

	.cache_type	= REGCACHE_RBTREE,

	.volatile_reg	= vcnl4035_is_volatile_reg,

	.val_format_endian = REGMAP_ENDIAN_LITTLE,

};



static int vcnl4035_probe_trigger(struct iio_dev *indio_dev)

{

	int ret;

	struct vcnl4035_data *data = iio_priv(indio_dev);



	data->drdy_trigger0 = devm_iio_trigger_alloc(

			indio_dev->dev.parent,

			"%s-dev%d", indio_dev->name, indio_dev->id);

	if (!data->drdy_trigger0)

		return -ENOMEM;



	data->drdy_trigger0->dev.parent = indio_dev->dev.parent;

	data->drdy_trigger0->ops = &vcnl4035_trigger_ops;

	iio_trigger_set_drvdata(data->drdy_trigger0, indio_dev);

	ret = devm_iio_trigger_register(indio_dev->dev.parent,

					data->drdy_trigger0);

	if (ret) {

		dev_err(&data->client->dev, "iio trigger register failed\n");

		return ret;

	}



	/* Trigger setup */

	ret = devm_iio_triggered_buffer_setup(indio_dev->dev.parent, indio_dev,

					NULL, vcnl4035_trigger_consumer_handler,

					&iio_triggered_buffer_setup_ops);

	if (ret < 0) {

		dev_err(&data->client->dev, "iio triggered buffer setup failed\n");

		return ret;

	}



	/* IRQ to trigger mapping */

	ret = devm_request_threaded_irq(&data->client->dev, data->client->irq,

			NULL, vcnl4035_drdy_irq_thread,

			IRQF_TRIGGER_LOW | IRQF_ONESHOT,

			VCNL4035_IRQ_NAME, indio_dev);

	if (ret < 0)

		dev_err(&data->client->dev, "request irq %d for trigger0 failed\n",

				data->client->irq);

	return ret;

}



static int vcnl4035_probe(struct i2c_client *client,

				const struct i2c_device_id *id)

{

	struct vcnl4035_data *data;

	struct iio_dev *indio_dev;

	struct regmap *regmap;

	int ret;



	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));

	if (!indio_dev)

		return -ENOMEM;



	regmap = devm_regmap_init_i2c(client, &vcnl4035_regmap_config);

	if (IS_ERR(regmap)) {

		dev_err(&client->dev, "regmap_init failed!\n");

		return PTR_ERR(regmap);

	}



	data = iio_priv(indio_dev);

	i2c_set_clientdata(client, indio_dev);

	data->client = client;

	data->regmap = regmap;



	indio_dev->dev.parent = &client->dev;

	indio_dev->info = &vcnl4035_info;

	indio_dev->name = VCNL4035_DRV_NAME;

	indio_dev->channels = vcnl4035_channels;

	indio_dev->num_channels = ARRAY_SIZE(vcnl4035_channels);

	indio_dev->modes = INDIO_DIRECT_MODE;



	ret = vcnl4035_init(data);

	if (ret < 0) {

		dev_err(&client->dev, "vcnl4035 chip init failed\n");

		return ret;

	}



	if (client->irq > 0) {

		ret = vcnl4035_probe_trigger(indio_dev);

		if (ret < 0) {

			dev_err(&client->dev, "vcnl4035 unable init trigger\n");

			goto fail_poweroff;

		}

	}



	ret = pm_runtime_set_active(&client->dev);

	if (ret < 0)

		goto fail_poweroff;



	ret = iio_device_register(indio_dev);

	if (ret < 0)

		goto fail_poweroff;



	pm_runtime_enable(&client->dev);

	pm_runtime_set_autosuspend_delay(&client->dev, VCNL4035_SLEEP_DELAY_MS);

	pm_runtime_use_autosuspend(&client->dev);



	return 0;



fail_poweroff:

	vcnl4035_set_als_power_state(data, VCNL4035_MODE_ALS_DISABLE);

	return ret;

}



static int vcnl4035_remove(struct i2c_client *client)

{

	struct iio_dev *indio_dev = i2c_get_clientdata(client);



	pm_runtime_dont_use_autosuspend(&client->dev);

	pm_runtime_disable(&client->dev);

	iio_device_unregister(indio_dev);

	pm_runtime_set_suspended(&client->dev);



	return vcnl4035_set_als_power_state(iio_priv(indio_dev),

					VCNL4035_MODE_ALS_DISABLE);

}



static int __maybe_unused vcnl4035_runtime_suspend(struct device *dev)

{

	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));

	struct vcnl4035_data *data = iio_priv(indio_dev);

	int ret;



	ret = vcnl4035_set_als_power_state(data, VCNL4035_MODE_ALS_DISABLE);

	regcache_mark_dirty(data->regmap);



	return ret;

}



static int __maybe_unused vcnl4035_runtime_resume(struct device *dev)

{

	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));

	struct vcnl4035_data *data = iio_priv(indio_dev);

	int ret;



	regcache_sync(data->regmap);

	ret = vcnl4035_set_als_power_state(data, VCNL4035_MODE_ALS_ENABLE);

	if (ret < 0)

		return ret;



	/* wait for 1 ALS integration cycle */

	msleep(data->als_it_val * 100);



	return 0;

}



static const struct dev_pm_ops vcnl4035_pm_ops = {

	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,

				pm_runtime_force_resume)

	SET_RUNTIME_PM_OPS(vcnl4035_runtime_suspend,

			   vcnl4035_runtime_resume, NULL)

};



static const struct of_device_id vcnl4035_of_match[] = {

	{ .compatible = "vishay,vcnl4035", },

	{ }

};

MODULE_DEVICE_TABLE(of, vcnl4035_of_match);



static struct i2c_driver vcnl4035_driver = {

	.driver = {

		.name   = VCNL4035_DRV_NAME,

		.pm	= &vcnl4035_pm_ops,

		.of_match_table = vcnl4035_of_match,

	},

	.probe  = vcnl4035_probe,

	.remove	= vcnl4035_remove,

};



module_i2c_driver(vcnl4035_driver);



MODULE_AUTHOR("Parthiban Nallathambi <pn@denx.de>");

MODULE_DESCRIPTION("VCNL4035 Ambient Light Sensor driver");

MODULE_LICENSE("GPL v2");