[mirror_ubuntu-jammy-kernel.git] / drivers / leds / leds-lm3642.c

// SPDX-License-Identifier: GPL-2.0-only
/*
* Simple driver for Texas Instruments LM3642 LED Flash driver chip
* Copyright (C) 2012 Texas Instruments
*/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/leds.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/fs.h>
#include <linux/regmap.h>
#include <linux/platform_data/leds-lm3642.h>

#define	REG_FILT_TIME			(0x0)
#define	REG_IVFM_MODE			(0x1)
#define	REG_TORCH_TIME			(0x6)
#define	REG_FLASH			(0x8)
#define	REG_I_CTRL			(0x9)
#define	REG_ENABLE			(0xA)
#define	REG_FLAG			(0xB)
#define	REG_MAX				(0xB)

#define	UVLO_EN_SHIFT			(7)
#define	IVM_D_TH_SHIFT			(2)
#define	TORCH_RAMP_UP_TIME_SHIFT	(3)
#define	TORCH_RAMP_DN_TIME_SHIFT	(0)
#define	INDUCTOR_I_LIMIT_SHIFT		(6)
#define	FLASH_RAMP_TIME_SHIFT		(3)
#define	FLASH_TOUT_TIME_SHIFT		(0)
#define	TORCH_I_SHIFT			(4)
#define	FLASH_I_SHIFT			(0)
#define	IVFM_SHIFT			(7)
#define	TX_PIN_EN_SHIFT			(6)
#define	STROBE_PIN_EN_SHIFT		(5)
#define	TORCH_PIN_EN_SHIFT		(4)
#define	MODE_BITS_SHIFT			(0)

#define	UVLO_EN_MASK			(0x1)
#define	IVM_D_TH_MASK			(0x7)
#define	TORCH_RAMP_UP_TIME_MASK		(0x7)
#define	TORCH_RAMP_DN_TIME_MASK		(0x7)
#define	INDUCTOR_I_LIMIT_MASK		(0x1)
#define	FLASH_RAMP_TIME_MASK		(0x7)
#define	FLASH_TOUT_TIME_MASK		(0x7)
#define	TORCH_I_MASK			(0x7)
#define	FLASH_I_MASK			(0xF)
#define	IVFM_MASK			(0x1)
#define	TX_PIN_EN_MASK			(0x1)
#define	STROBE_PIN_EN_MASK		(0x1)
#define	TORCH_PIN_EN_MASK		(0x1)
#define	MODE_BITS_MASK			(0x73)
#define EX_PIN_CONTROL_MASK		(0x71)
#define EX_PIN_ENABLE_MASK		(0x70)

enum lm3642_mode {
	MODES_STASNDBY = 0,
	MODES_INDIC,
	MODES_TORCH,
	MODES_FLASH
};

struct lm3642_chip_data {
	struct device *dev;

	struct led_classdev cdev_flash;
	struct led_classdev cdev_torch;
	struct led_classdev cdev_indicator;

	u8 br_flash;
	u8 br_torch;
	u8 br_indicator;

	enum lm3642_torch_pin_enable torch_pin;
	enum lm3642_strobe_pin_enable strobe_pin;
	enum lm3642_tx_pin_enable tx_pin;

	struct lm3642_platform_data *pdata;
	struct regmap *regmap;
	struct mutex lock;

	unsigned int last_flag;
};

/* chip initialize */
static int lm3642_chip_init(struct lm3642_chip_data *chip)
{
	int ret;
	struct lm3642_platform_data *pdata = chip->pdata;

	/* set enable register */
	ret = regmap_update_bits(chip->regmap, REG_ENABLE, EX_PIN_ENABLE_MASK,
				 pdata->tx_pin);
	if (ret < 0)
		dev_err(chip->dev, "Failed to update REG_ENABLE Register\n");
	return ret;
}

/* chip control */
static int lm3642_control(struct lm3642_chip_data *chip,
			  u8 brightness, enum lm3642_mode opmode)
{
	int ret;

	ret = regmap_read(chip->regmap, REG_FLAG, &chip->last_flag);
	if (ret < 0) {
		dev_err(chip->dev, "Failed to read REG_FLAG Register\n");
		return ret;
	}

	if (chip->last_flag)
		dev_info(chip->dev, "Last FLAG is 0x%x\n", chip->last_flag);

	/* brightness 0 means off-state */
	if (!brightness)
		opmode = MODES_STASNDBY;

	switch (opmode) {
	case MODES_TORCH:
		ret = regmap_update_bits(chip->regmap, REG_I_CTRL,
					 TORCH_I_MASK << TORCH_I_SHIFT,
					 (brightness - 1) << TORCH_I_SHIFT);

		if (chip->torch_pin)
			opmode |= (TORCH_PIN_EN_MASK << TORCH_PIN_EN_SHIFT);
		break;

	case MODES_FLASH:
		ret = regmap_update_bits(chip->regmap, REG_I_CTRL,
					 FLASH_I_MASK << FLASH_I_SHIFT,
					 (brightness - 1) << FLASH_I_SHIFT);

		if (chip->strobe_pin)
			opmode |= (STROBE_PIN_EN_MASK << STROBE_PIN_EN_SHIFT);
		break;

	case MODES_INDIC:
		ret = regmap_update_bits(chip->regmap, REG_I_CTRL,
					 TORCH_I_MASK << TORCH_I_SHIFT,
					 (brightness - 1) << TORCH_I_SHIFT);
		break;

	case MODES_STASNDBY:

		break;

	default:
		return -EINVAL;
	}
	if (ret < 0) {
		dev_err(chip->dev, "Failed to write REG_I_CTRL Register\n");
		return ret;
	}

	if (chip->tx_pin)
		opmode |= (TX_PIN_EN_MASK << TX_PIN_EN_SHIFT);

	ret = regmap_update_bits(chip->regmap, REG_ENABLE,
				 MODE_BITS_MASK << MODE_BITS_SHIFT,
				 opmode << MODE_BITS_SHIFT);
	return ret;
}

/* torch */

/* torch pin config for lm3642 */
static ssize_t torch_pin_store(struct device *dev,
			       struct device_attribute *attr,
			       const char *buf, size_t size)
{
	ssize_t ret;
	struct led_classdev *led_cdev = dev_get_drvdata(dev);
	struct lm3642_chip_data *chip =
	    container_of(led_cdev, struct lm3642_chip_data, cdev_indicator);
	unsigned int state;

	ret = kstrtouint(buf, 10, &state);
	if (ret)
		return ret;
	if (state != 0)
		state = 0x01 << TORCH_PIN_EN_SHIFT;

	chip->torch_pin = state;
	ret = regmap_update_bits(chip->regmap, REG_ENABLE,
				 TORCH_PIN_EN_MASK << TORCH_PIN_EN_SHIFT,
				 state);
	if (ret < 0) {
		dev_err(chip->dev, "%s:i2c access fail to register\n", __func__);
		return ret;
	}

	return size;
}

static DEVICE_ATTR_WO(torch_pin);

static int lm3642_torch_brightness_set(struct led_classdev *cdev,
					enum led_brightness brightness)
{
	struct lm3642_chip_data *chip =
	    container_of(cdev, struct lm3642_chip_data, cdev_torch);
	int ret;

	mutex_lock(&chip->lock);
	chip->br_torch = brightness;
	ret = lm3642_control(chip, chip->br_torch, MODES_TORCH);
	mutex_unlock(&chip->lock);
	return ret;
}

/* flash */

/* strobe pin config for lm3642*/
static ssize_t strobe_pin_store(struct device *dev,
				struct device_attribute *attr,
				const char *buf, size_t size)
{
	ssize_t ret;
	struct led_classdev *led_cdev = dev_get_drvdata(dev);
	struct lm3642_chip_data *chip =
	    container_of(led_cdev, struct lm3642_chip_data, cdev_indicator);
	unsigned int state;

	ret = kstrtouint(buf, 10, &state);
	if (ret)
		return ret;
	if (state != 0)
		state = 0x01 << STROBE_PIN_EN_SHIFT;

	chip->strobe_pin = state;
	ret = regmap_update_bits(chip->regmap, REG_ENABLE,
				 STROBE_PIN_EN_MASK << STROBE_PIN_EN_SHIFT,
				 state);
	if (ret < 0) {
		dev_err(chip->dev, "%s:i2c access fail to register\n", __func__);
		return ret;
	}

	return size;
}

static DEVICE_ATTR_WO(strobe_pin);

static int lm3642_strobe_brightness_set(struct led_classdev *cdev,
					 enum led_brightness brightness)
{
	struct lm3642_chip_data *chip =
	    container_of(cdev, struct lm3642_chip_data, cdev_flash);
	int ret;

	mutex_lock(&chip->lock);
	chip->br_flash = brightness;
	ret = lm3642_control(chip, chip->br_flash, MODES_FLASH);
	mutex_unlock(&chip->lock);
	return ret;
}

/* indicator */
static int lm3642_indicator_brightness_set(struct led_classdev *cdev,
					    enum led_brightness brightness)
{
	struct lm3642_chip_data *chip =
	    container_of(cdev, struct lm3642_chip_data, cdev_indicator);
	int ret;

	mutex_lock(&chip->lock);
	chip->br_indicator = brightness;
	ret = lm3642_control(chip, chip->br_indicator, MODES_INDIC);
	mutex_unlock(&chip->lock);
	return ret;
}

static const struct regmap_config lm3642_regmap = {
	.reg_bits = 8,
	.val_bits = 8,
	.max_register = REG_MAX,
};

static struct attribute *lm3642_flash_attrs[] = {
	&dev_attr_strobe_pin.attr,
	NULL
};
ATTRIBUTE_GROUPS(lm3642_flash);

static struct attribute *lm3642_torch_attrs[] = {
	&dev_attr_torch_pin.attr,
	NULL
};
ATTRIBUTE_GROUPS(lm3642_torch);

static int lm3642_probe(struct i2c_client *client,
				  const struct i2c_device_id *id)
{
	struct lm3642_platform_data *pdata = dev_get_platdata(&client->dev);
	struct lm3642_chip_data *chip;

	int err;

	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
		dev_err(&client->dev, "i2c functionality check fail.\n");
		return -EOPNOTSUPP;
	}

	if (pdata == NULL) {
		dev_err(&client->dev, "needs Platform Data.\n");
		return -ENODATA;
	}

	chip = devm_kzalloc(&client->dev,
			    sizeof(struct lm3642_chip_data), GFP_KERNEL);
	if (!chip)
		return -ENOMEM;

	chip->dev = &client->dev;
	chip->pdata = pdata;

	chip->tx_pin = pdata->tx_pin;
	chip->torch_pin = pdata->torch_pin;
	chip->strobe_pin = pdata->strobe_pin;

	chip->regmap = devm_regmap_init_i2c(client, &lm3642_regmap);
	if (IS_ERR(chip->regmap)) {
		err = PTR_ERR(chip->regmap);
		dev_err(&client->dev, "Failed to allocate register map: %d\n",
			err);
		return err;
	}

	mutex_init(&chip->lock);
	i2c_set_clientdata(client, chip);

	err = lm3642_chip_init(chip);
	if (err < 0)
		goto err_out;

	/* flash */
	chip->cdev_flash.name = "flash";
	chip->cdev_flash.max_brightness = 16;
	chip->cdev_flash.brightness_set_blocking = lm3642_strobe_brightness_set;
	chip->cdev_flash.default_trigger = "flash";
	chip->cdev_flash.groups = lm3642_flash_groups,
	err = led_classdev_register(&client->dev, &chip->cdev_flash);
	if (err < 0) {
		dev_err(chip->dev, "failed to register flash\n");
		goto err_out;
	}

	/* torch */
	chip->cdev_torch.name = "torch";
	chip->cdev_torch.max_brightness = 8;
	chip->cdev_torch.brightness_set_blocking = lm3642_torch_brightness_set;
	chip->cdev_torch.default_trigger = "torch";
	chip->cdev_torch.groups = lm3642_torch_groups,
	err = led_classdev_register(&client->dev, &chip->cdev_torch);
	if (err < 0) {
		dev_err(chip->dev, "failed to register torch\n");
		goto err_create_torch_file;
	}

	/* indicator */
	chip->cdev_indicator.name = "indicator";
	chip->cdev_indicator.max_brightness = 8;
	chip->cdev_indicator.brightness_set_blocking =
						lm3642_indicator_brightness_set;
	err = led_classdev_register(&client->dev, &chip->cdev_indicator);
	if (err < 0) {
		dev_err(chip->dev, "failed to register indicator\n");
		goto err_create_indicator_file;
	}

	dev_info(&client->dev, "LM3642 is initialized\n");
	return 0;

err_create_indicator_file:
	led_classdev_unregister(&chip->cdev_torch);
err_create_torch_file:
	led_classdev_unregister(&chip->cdev_flash);
err_out:
	return err;
}

static int lm3642_remove(struct i2c_client *client)
{
	struct lm3642_chip_data *chip = i2c_get_clientdata(client);

	led_classdev_unregister(&chip->cdev_indicator);
	led_classdev_unregister(&chip->cdev_torch);
	led_classdev_unregister(&chip->cdev_flash);
	regmap_write(chip->regmap, REG_ENABLE, 0);
	return 0;
}

static const struct i2c_device_id lm3642_id[] = {
	{LM3642_NAME, 0},
	{}
};

MODULE_DEVICE_TABLE(i2c, lm3642_id);

static struct i2c_driver lm3642_i2c_driver = {
	.driver = {
		   .name = LM3642_NAME,
		   .pm = NULL,
		   },
	.probe = lm3642_probe,
	.remove = lm3642_remove,
	.id_table = lm3642_id,
};

module_i2c_driver(lm3642_i2c_driver);

MODULE_DESCRIPTION("Texas Instruments Flash Lighting driver for LM3642");
MODULE_AUTHOR("Daniel Jeong <daniel.jeong@ti.com>");
MODULE_AUTHOR("G.Shark Jeong <gshark.jeong@gmail.com>");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
8b7cfbec SJ	2	/*
	3	* Simple driver for Texas Instruments LM3642 LED Flash driver chip
	4	* Copyright (C) 2012 Texas Instruments
8b7cfbec SJ	5	*/
	6	#include <linux/module.h>
	7	#include <linux/delay.h>
	8	#include <linux/i2c.h>
	9	#include <linux/leds.h>
	10	#include <linux/slab.h>
	11	#include <linux/platform_device.h>
	12	#include <linux/fs.h>
	13	#include <linux/regmap.h>
8b7cfbec SJ	14	#include <linux/platform_data/leds-lm3642.h>
	15
	16	#define REG_FILT_TIME (0x0)
	17	#define REG_IVFM_MODE (0x1)
	18	#define REG_TORCH_TIME (0x6)
	19	#define REG_FLASH (0x8)
	20	#define REG_I_CTRL (0x9)
	21	#define REG_ENABLE (0xA)
	22	#define REG_FLAG (0xB)
	23	#define REG_MAX (0xB)
	24
	25	#define UVLO_EN_SHIFT (7)
	26	#define IVM_D_TH_SHIFT (2)
	27	#define TORCH_RAMP_UP_TIME_SHIFT (3)
	28	#define TORCH_RAMP_DN_TIME_SHIFT (0)
	29	#define INDUCTOR_I_LIMIT_SHIFT (6)
	30	#define FLASH_RAMP_TIME_SHIFT (3)
	31	#define FLASH_TOUT_TIME_SHIFT (0)
	32	#define TORCH_I_SHIFT (4)
	33	#define FLASH_I_SHIFT (0)
	34	#define IVFM_SHIFT (7)
	35	#define TX_PIN_EN_SHIFT (6)
	36	#define STROBE_PIN_EN_SHIFT (5)
	37	#define TORCH_PIN_EN_SHIFT (4)
	38	#define MODE_BITS_SHIFT (0)
	39
	40	#define UVLO_EN_MASK (0x1)
	41	#define IVM_D_TH_MASK (0x7)
	42	#define TORCH_RAMP_UP_TIME_MASK (0x7)
	43	#define TORCH_RAMP_DN_TIME_MASK (0x7)
	44	#define INDUCTOR_I_LIMIT_MASK (0x1)
	45	#define FLASH_RAMP_TIME_MASK (0x7)
	46	#define FLASH_TOUT_TIME_MASK (0x7)
	47	#define TORCH_I_MASK (0x7)
	48	#define FLASH_I_MASK (0xF)
	49	#define IVFM_MASK (0x1)
	50	#define TX_PIN_EN_MASK (0x1)
	51	#define STROBE_PIN_EN_MASK (0x1)
	52	#define TORCH_PIN_EN_MASK (0x1)
	53	#define MODE_BITS_MASK (0x73)
	54	#define EX_PIN_CONTROL_MASK (0x71)
	55	#define EX_PIN_ENABLE_MASK (0x70)
	56
	57	enum lm3642_mode {
	58	MODES_STASNDBY = 0,
	59	MODES_INDIC,
	60	MODES_TORCH,
	61	MODES_FLASH
	62	};
	63
	64	struct lm3642_chip_data {
	65	struct device *dev;
	66
	67	struct led_classdev cdev_flash;
	68	struct led_classdev cdev_torch;
	69	struct led_classdev cdev_indicator;
	70
8b7cfbec SJ	71	u8 br_flash;
	72	u8 br_torch;
	73	u8 br_indicator;
	74
	75	enum lm3642_torch_pin_enable torch_pin;
	76	enum lm3642_strobe_pin_enable strobe_pin;
	77	enum lm3642_tx_pin_enable tx_pin;
	78
	79	struct lm3642_platform_data *pdata;
	80	struct regmap *regmap;
	81	struct mutex lock;
	82
	83	unsigned int last_flag;
	84	};
	85
	86	/* chip initialize */
98ea1ea2	87	static int lm3642_chip_init(struct lm3642_chip_data *chip)
8b7cfbec	88	{
8b7cfbec SJ	89	int ret;
	90	struct lm3642_platform_data *pdata = chip->pdata;
	91
	92	/* set enable register */
e76a322a AL	93	ret = regmap_update_bits(chip->regmap, REG_ENABLE, EX_PIN_ENABLE_MASK,
e76a322a AL	94	pdata->tx_pin);
8b7cfbec	95	if (ret < 0)
e76a322a	96	dev_err(chip->dev, "Failed to update REG_ENABLE Register\n");
8b7cfbec SJ	97	return ret;
	98	}
	99
	100	/* chip control */
	101	static int lm3642_control(struct lm3642_chip_data *chip,
	102	u8 brightness, enum lm3642_mode opmode)
	103	{
	104	int ret;
	105
	106	ret = regmap_read(chip->regmap, REG_FLAG, &chip->last_flag);
	107	if (ret < 0) {
	108	dev_err(chip->dev, "Failed to read REG_FLAG Register\n");
867b6824	109	return ret;
8b7cfbec SJ	110	}
	111
	112	if (chip->last_flag)
	113	dev_info(chip->dev, "Last FLAG is 0x%x\n", chip->last_flag);
	114
	115	/* brightness 0 means off-state */
	116	if (!brightness)
	117	opmode = MODES_STASNDBY;
	118
	119	switch (opmode) {
	120	case MODES_TORCH:
	121	ret = regmap_update_bits(chip->regmap, REG_I_CTRL,
	122	TORCH_I_MASK << TORCH_I_SHIFT,
	123	(brightness - 1) << TORCH_I_SHIFT);
	124
	125	if (chip->torch_pin)
	126	opmode \|= (TORCH_PIN_EN_MASK << TORCH_PIN_EN_SHIFT);
	127	break;
	128
	129	case MODES_FLASH:
	130	ret = regmap_update_bits(chip->regmap, REG_I_CTRL,
	131	FLASH_I_MASK << FLASH_I_SHIFT,
	132	(brightness - 1) << FLASH_I_SHIFT);
	133
	134	if (chip->strobe_pin)
	135	opmode \|= (STROBE_PIN_EN_MASK << STROBE_PIN_EN_SHIFT);
	136	break;
	137
	138	case MODES_INDIC:
	139	ret = regmap_update_bits(chip->regmap, REG_I_CTRL,
	140	TORCH_I_MASK << TORCH_I_SHIFT,
	141	(brightness - 1) << TORCH_I_SHIFT);
	142	break;
	143
	144	case MODES_STASNDBY:
	145
	146	break;
	147
	148	default:
867b6824	149	return -EINVAL;
8b7cfbec SJ	150	}
	151	if (ret < 0) {
	152	dev_err(chip->dev, "Failed to write REG_I_CTRL Register\n");
867b6824	153	return ret;
8b7cfbec SJ	154	}
	155
	156	if (chip->tx_pin)
	157	opmode \|= (TX_PIN_EN_MASK << TX_PIN_EN_SHIFT);
	158
	159	ret = regmap_update_bits(chip->regmap, REG_ENABLE,
	160	MODE_BITS_MASK << MODE_BITS_SHIFT,
	161	opmode << MODE_BITS_SHIFT);
8b7cfbec SJ	162	return ret;
	163	}
	164
	165	/* torch */
	166
867b6824	167	/* torch pin config for lm3642 */
5ccfa39d DR	168	static ssize_t torch_pin_store(struct device *dev,
	169	struct device_attribute *attr,
	170	const char *buf, size_t size)
8b7cfbec SJ	171	{
	172	ssize_t ret;
	173	struct led_classdev *led_cdev = dev_get_drvdata(dev);
	174	struct lm3642_chip_data *chip =
	175	container_of(led_cdev, struct lm3642_chip_data, cdev_indicator);
	176	unsigned int state;
	177
	178	ret = kstrtouint(buf, 10, &state);
	179	if (ret)
867b6824	180	return ret;
8b7cfbec SJ	181	if (state != 0)
	182	state = 0x01 << TORCH_PIN_EN_SHIFT;
	183
	184	chip->torch_pin = state;
	185	ret = regmap_update_bits(chip->regmap, REG_ENABLE,
	186	TORCH_PIN_EN_MASK << TORCH_PIN_EN_SHIFT,
	187	state);
867b6824 PM	188	if (ret < 0) {
	189	dev_err(chip->dev, "%s:i2c access fail to register\n", __func__);
	190	return ret;
	191	}
8b7cfbec SJ	192
8b7cfbec SJ	193	return size;
8b7cfbec SJ	194	}
8b7cfbec SJ	195
5ccfa39d	196	static DEVICE_ATTR_WO(torch_pin);
8b7cfbec	197
bb58cc81	198	static int lm3642_torch_brightness_set(struct led_classdev *cdev,
8b7cfbec SJ	199	enum led_brightness brightness)
	200	{
	201	struct lm3642_chip_data *chip =
	202	container_of(cdev, struct lm3642_chip_data, cdev_torch);
bb58cc81	203	int ret;
8b7cfbec	204
bb58cc81	205	mutex_lock(&chip->lock);
8b7cfbec	206	chip->br_torch = brightness;
bb58cc81 AL	207	ret = lm3642_control(chip, chip->br_torch, MODES_TORCH);
	208	mutex_unlock(&chip->lock);
	209	return ret;
8b7cfbec SJ	210	}
	211
	212	/* flash */
	213
	214	/* strobe pin config for lm3642*/
5ccfa39d DR	215	static ssize_t strobe_pin_store(struct device *dev,
	216	struct device_attribute *attr,
	217	const char *buf, size_t size)
8b7cfbec SJ	218	{
	219	ssize_t ret;
	220	struct led_classdev *led_cdev = dev_get_drvdata(dev);
	221	struct lm3642_chip_data *chip =
	222	container_of(led_cdev, struct lm3642_chip_data, cdev_indicator);
	223	unsigned int state;
	224
	225	ret = kstrtouint(buf, 10, &state);
	226	if (ret)
867b6824	227	return ret;
8b7cfbec SJ	228	if (state != 0)
	229	state = 0x01 << STROBE_PIN_EN_SHIFT;
	230
	231	chip->strobe_pin = state;
	232	ret = regmap_update_bits(chip->regmap, REG_ENABLE,
	233	STROBE_PIN_EN_MASK << STROBE_PIN_EN_SHIFT,
	234	state);
867b6824 PM	235	if (ret < 0) {
	236	dev_err(chip->dev, "%s:i2c access fail to register\n", __func__);
	237	return ret;
	238	}
8b7cfbec SJ	239
8b7cfbec SJ	240	return size;
8b7cfbec SJ	241	}
8b7cfbec SJ	242
5ccfa39d	243	static DEVICE_ATTR_WO(strobe_pin);
8b7cfbec	244
bb58cc81	245	static int lm3642_strobe_brightness_set(struct led_classdev *cdev,
8b7cfbec SJ	246	enum led_brightness brightness)
	247	{
	248	struct lm3642_chip_data *chip =
	249	container_of(cdev, struct lm3642_chip_data, cdev_flash);
bb58cc81	250	int ret;
8b7cfbec SJ	251
8b7cfbec SJ	252	mutex_lock(&chip->lock);
bb58cc81 AL	253	chip->br_flash = brightness;
bb58cc81 AL	254	ret = lm3642_control(chip, chip->br_flash, MODES_FLASH);
8b7cfbec	255	mutex_unlock(&chip->lock);
bb58cc81	256	return ret;
8b7cfbec SJ	257	}
8b7cfbec SJ	258
bb58cc81 AL	259	/* indicator */
bb58cc81 AL	260	static int lm3642_indicator_brightness_set(struct led_classdev *cdev,
8b7cfbec SJ	261	enum led_brightness brightness)
	262	{
	263	struct lm3642_chip_data *chip =
	264	container_of(cdev, struct lm3642_chip_data, cdev_indicator);
bb58cc81	265	int ret;
8b7cfbec	266
bb58cc81	267	mutex_lock(&chip->lock);
8b7cfbec	268	chip->br_indicator = brightness;
bb58cc81 AL	269	ret = lm3642_control(chip, chip->br_indicator, MODES_INDIC);
	270	mutex_unlock(&chip->lock);
	271	return ret;
8b7cfbec SJ	272	}
	273
	274	static const struct regmap_config lm3642_regmap = {
	275	.reg_bits = 8,
	276	.val_bits = 8,
	277	.max_register = REG_MAX,
	278	};
	279
fe29a3b0 JH	280	static struct attribute *lm3642_flash_attrs[] = {
	281	&dev_attr_strobe_pin.attr,
	282	NULL
	283	};
	284	ATTRIBUTE_GROUPS(lm3642_flash);
	285
	286	static struct attribute *lm3642_torch_attrs[] = {
	287	&dev_attr_torch_pin.attr,
	288	NULL
	289	};
	290	ATTRIBUTE_GROUPS(lm3642_torch);
	291
98ea1ea2	292	static int lm3642_probe(struct i2c_client *client,
8b7cfbec SJ	293	const struct i2c_device_id *id)
8b7cfbec SJ	294	{
87aae1ea	295	struct lm3642_platform_data *pdata = dev_get_platdata(&client->dev);
8b7cfbec SJ	296	struct lm3642_chip_data *chip;
	297
	298	int err;
	299
	300	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
	301	dev_err(&client->dev, "i2c functionality check fail.\n");
	302	return -EOPNOTSUPP;
	303	}
	304
	305	if (pdata == NULL) {
	306	dev_err(&client->dev, "needs Platform Data.\n");
	307	return -ENODATA;
	308	}
	309
	310	chip = devm_kzalloc(&client->dev,
	311	sizeof(struct lm3642_chip_data), GFP_KERNEL);
	312	if (!chip)
	313	return -ENOMEM;
	314
	315	chip->dev = &client->dev;
	316	chip->pdata = pdata;
	317
	318	chip->tx_pin = pdata->tx_pin;
	319	chip->torch_pin = pdata->torch_pin;
	320	chip->strobe_pin = pdata->strobe_pin;
	321
	322	chip->regmap = devm_regmap_init_i2c(client, &lm3642_regmap);
	323	if (IS_ERR(chip->regmap)) {
	324	err = PTR_ERR(chip->regmap);
	325	dev_err(&client->dev, "Failed to allocate register map: %d\n",
	326	err);
	327	return err;
	328	}
	329
	330	mutex_init(&chip->lock);
	331	i2c_set_clientdata(client, chip);
	332
	333	err = lm3642_chip_init(chip);
	334	if (err < 0)
	335	goto err_out;
	336
	337	/* flash */
8b7cfbec SJ	338	chip->cdev_flash.name = "flash";
8b7cfbec SJ	339	chip->cdev_flash.max_brightness = 16;
bb58cc81	340	chip->cdev_flash.brightness_set_blocking = lm3642_strobe_brightness_set;
313bf0b1	341	chip->cdev_flash.default_trigger = "flash";
fe29a3b0	342	chip->cdev_flash.groups = lm3642_flash_groups,
b5684a73	343	err = led_classdev_register(&client->dev, &chip->cdev_flash);
8b7cfbec SJ	344	if (err < 0) {
	345	dev_err(chip->dev, "failed to register flash\n");
	346	goto err_out;
	347	}
8b7cfbec SJ	348
8b7cfbec SJ	349	/* torch */
8b7cfbec SJ	350	chip->cdev_torch.name = "torch";
8b7cfbec SJ	351	chip->cdev_torch.max_brightness = 8;
bb58cc81	352	chip->cdev_torch.brightness_set_blocking = lm3642_torch_brightness_set;
313bf0b1	353	chip->cdev_torch.default_trigger = "torch";
fe29a3b0	354	chip->cdev_torch.groups = lm3642_torch_groups,
b5684a73	355	err = led_classdev_register(&client->dev, &chip->cdev_torch);
8b7cfbec SJ	356	if (err < 0) {
	357	dev_err(chip->dev, "failed to register torch\n");
	358	goto err_create_torch_file;
	359	}
8b7cfbec SJ	360
8b7cfbec SJ	361	/* indicator */
8b7cfbec SJ	362	chip->cdev_indicator.name = "indicator";
8b7cfbec SJ	363	chip->cdev_indicator.max_brightness = 8;
bb58cc81 AL	364	chip->cdev_indicator.brightness_set_blocking =
bb58cc81 AL	365	lm3642_indicator_brightness_set;
b5684a73	366	err = led_classdev_register(&client->dev, &chip->cdev_indicator);
8b7cfbec SJ	367	if (err < 0) {
	368	dev_err(chip->dev, "failed to register indicator\n");
	369	goto err_create_indicator_file;
	370	}
	371
	372	dev_info(&client->dev, "LM3642 is initialized\n");
	373	return 0;
	374
	375	err_create_indicator_file:
8b7cfbec SJ	376	led_classdev_unregister(&chip->cdev_torch);
8b7cfbec SJ	377	err_create_torch_file:
8b7cfbec SJ	378	led_classdev_unregister(&chip->cdev_flash);
	379	err_out:
	380	return err;
	381	}
	382
678e8a6b	383	static int lm3642_remove(struct i2c_client *client)
8b7cfbec SJ	384	{
	385	struct lm3642_chip_data *chip = i2c_get_clientdata(client);
	386
	387	led_classdev_unregister(&chip->cdev_indicator);
8b7cfbec	388	led_classdev_unregister(&chip->cdev_torch);
8b7cfbec	389	led_classdev_unregister(&chip->cdev_flash);
8b7cfbec SJ	390	regmap_write(chip->regmap, REG_ENABLE, 0);
	391	return 0;
	392	}
	393
	394	static const struct i2c_device_id lm3642_id[] = {
	395	{LM3642_NAME, 0},
	396	{}
	397	};
	398
	399	MODULE_DEVICE_TABLE(i2c, lm3642_id);
	400
	401	static struct i2c_driver lm3642_i2c_driver = {
	402	.driver = {
	403	.name = LM3642_NAME,
8b7cfbec SJ	404	.pm = NULL,
	405	},
	406	.probe = lm3642_probe,
df07cf81	407	.remove = lm3642_remove,
8b7cfbec SJ	408	.id_table = lm3642_id,
	409	};
	410
	411	module_i2c_driver(lm3642_i2c_driver);
	412
	413	MODULE_DESCRIPTION("Texas Instruments Flash Lighting driver for LM3642");
	414	MODULE_AUTHOR("Daniel Jeong <daniel.jeong@ti.com>");
	415	MODULE_AUTHOR("G.Shark Jeong <gshark.jeong@gmail.com>");
	416	MODULE_LICENSE("GPL v2");