[linux-2.6-block.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");
		goto out;
	}

	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 ret;
	}
	if (ret < 0) {
		dev_err(chip->dev, "Failed to write REG_I_CTRL Register\n");
		goto out;
	}

	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);
out:
	return ret;
}

/* torch */

/* torch pin config for lm3642*/
static ssize_t lm3642_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)
		goto out_strtoint;
	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)
		goto out;

	return size;
out:
	dev_err(chip->dev, "%s:i2c access fail to register\n", __func__);
	return ret;
out_strtoint:
	dev_err(chip->dev, "%s: fail to change str to int\n", __func__);
	return ret;
}

static DEVICE_ATTR(torch_pin, S_IWUSR, NULL, lm3642_torch_pin_store);

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 lm3642_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)
		goto out_strtoint;
	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)
		goto out;

	return size;
out:
	dev_err(chip->dev, "%s:i2c access fail to register\n", __func__);
	return ret;
out_strtoint:
	dev_err(chip->dev, "%s: fail to change str to int\n", __func__);
	return ret;
}

static DEVICE_ATTR(strobe_pin, S_IWUSR, NULL, lm3642_strobe_pin_store);

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((struct device *)
				    &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((struct device *)
				    &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((struct device *)
				    &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");
	109	goto out;
	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:
	149	return ret;
	150	}
	151	if (ret < 0) {
	152	dev_err(chip->dev, "Failed to write REG_I_CTRL Register\n");
	153	goto out;
	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);
162	out:
163	return ret;
164	}
165
166	/* torch */
167
168	/* torch pin config for lm3642*/
169	static ssize_t lm3642_torch_pin_store(struct device *dev,
85b4b756	170	struct device_attribute *attr,
8b7cfbec SJ	171	const char *buf, size_t size)
	172	{
	173	ssize_t ret;
	174	struct led_classdev *led_cdev = dev_get_drvdata(dev);
	175	struct lm3642_chip_data *chip =
	176	container_of(led_cdev, struct lm3642_chip_data, cdev_indicator);
	177	unsigned int state;
	178
	179	ret = kstrtouint(buf, 10, &state);
	180	if (ret)
	181	goto out_strtoint;
	182	if (state != 0)
	183	state = 0x01 << TORCH_PIN_EN_SHIFT;
	184
	185	chip->torch_pin = state;
	186	ret = regmap_update_bits(chip->regmap, REG_ENABLE,
	187	TORCH_PIN_EN_MASK << TORCH_PIN_EN_SHIFT,
	188	state);
	189	if (ret < 0)
	190	goto out;
	191
	192	return size;
	193	out:
	194	dev_err(chip->dev, "%s:i2c access fail to register\n", __func__);
eccb6638	195	return ret;
8b7cfbec SJ	196	out_strtoint:
8b7cfbec SJ	197	dev_err(chip->dev, "%s: fail to change str to int\n", __func__);
eccb6638	198	return ret;
8b7cfbec SJ	199	}
8b7cfbec SJ	200
5cce0105	201	static DEVICE_ATTR(torch_pin, S_IWUSR, NULL, lm3642_torch_pin_store);
8b7cfbec	202
bb58cc81	203	static int lm3642_torch_brightness_set(struct led_classdev *cdev,
8b7cfbec SJ	204	enum led_brightness brightness)
	205	{
	206	struct lm3642_chip_data *chip =
	207	container_of(cdev, struct lm3642_chip_data, cdev_torch);
bb58cc81	208	int ret;
8b7cfbec	209
bb58cc81	210	mutex_lock(&chip->lock);
8b7cfbec	211	chip->br_torch = brightness;
bb58cc81 AL	212	ret = lm3642_control(chip, chip->br_torch, MODES_TORCH);
	213	mutex_unlock(&chip->lock);
	214	return ret;
8b7cfbec SJ	215	}
	216
	217	/* flash */
	218
	219	/* strobe pin config for lm3642*/
	220	static ssize_t lm3642_strobe_pin_store(struct device *dev,
85b4b756	221	struct device_attribute *attr,
8b7cfbec SJ	222	const char *buf, size_t size)
	223	{
	224	ssize_t ret;
	225	struct led_classdev *led_cdev = dev_get_drvdata(dev);
	226	struct lm3642_chip_data *chip =
	227	container_of(led_cdev, struct lm3642_chip_data, cdev_indicator);
	228	unsigned int state;
	229
	230	ret = kstrtouint(buf, 10, &state);
	231	if (ret)
	232	goto out_strtoint;
	233	if (state != 0)
	234	state = 0x01 << STROBE_PIN_EN_SHIFT;
	235
	236	chip->strobe_pin = state;
	237	ret = regmap_update_bits(chip->regmap, REG_ENABLE,
	238	STROBE_PIN_EN_MASK << STROBE_PIN_EN_SHIFT,
	239	state);
	240	if (ret < 0)
	241	goto out;
	242
	243	return size;
	244	out:
	245	dev_err(chip->dev, "%s:i2c access fail to register\n", __func__);
eccb6638	246	return ret;
8b7cfbec SJ	247	out_strtoint:
8b7cfbec SJ	248	dev_err(chip->dev, "%s: fail to change str to int\n", __func__);
eccb6638	249	return ret;
8b7cfbec SJ	250	}
8b7cfbec SJ	251
5cce0105	252	static DEVICE_ATTR(strobe_pin, S_IWUSR, NULL, lm3642_strobe_pin_store);
8b7cfbec	253
bb58cc81	254	static int lm3642_strobe_brightness_set(struct led_classdev *cdev,
8b7cfbec SJ	255	enum led_brightness brightness)
	256	{
	257	struct lm3642_chip_data *chip =
	258	container_of(cdev, struct lm3642_chip_data, cdev_flash);
bb58cc81	259	int ret;
8b7cfbec SJ	260
8b7cfbec SJ	261	mutex_lock(&chip->lock);
bb58cc81 AL	262	chip->br_flash = brightness;
bb58cc81 AL	263	ret = lm3642_control(chip, chip->br_flash, MODES_FLASH);
8b7cfbec	264	mutex_unlock(&chip->lock);
bb58cc81	265	return ret;
8b7cfbec SJ	266	}
8b7cfbec SJ	267
bb58cc81 AL	268	/* indicator */
bb58cc81 AL	269	static int lm3642_indicator_brightness_set(struct led_classdev *cdev,
8b7cfbec SJ	270	enum led_brightness brightness)
	271	{
	272	struct lm3642_chip_data *chip =
	273	container_of(cdev, struct lm3642_chip_data, cdev_indicator);
bb58cc81	274	int ret;
8b7cfbec	275
bb58cc81	276	mutex_lock(&chip->lock);
8b7cfbec	277	chip->br_indicator = brightness;
bb58cc81 AL	278	ret = lm3642_control(chip, chip->br_indicator, MODES_INDIC);
	279	mutex_unlock(&chip->lock);
	280	return ret;
8b7cfbec SJ	281	}
	282
	283	static const struct regmap_config lm3642_regmap = {
	284	.reg_bits = 8,
	285	.val_bits = 8,
	286	.max_register = REG_MAX,
	287	};
	288
fe29a3b0 JH	289	static struct attribute *lm3642_flash_attrs[] = {
	290	&dev_attr_strobe_pin.attr,
	291	NULL
	292	};
	293	ATTRIBUTE_GROUPS(lm3642_flash);
	294
	295	static struct attribute *lm3642_torch_attrs[] = {
	296	&dev_attr_torch_pin.attr,
	297	NULL
	298	};
	299	ATTRIBUTE_GROUPS(lm3642_torch);
	300
98ea1ea2	301	static int lm3642_probe(struct i2c_client *client,
8b7cfbec SJ	302	const struct i2c_device_id *id)
8b7cfbec SJ	303	{
87aae1ea	304	struct lm3642_platform_data *pdata = dev_get_platdata(&client->dev);
8b7cfbec SJ	305	struct lm3642_chip_data *chip;
	306
	307	int err;
	308
	309	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
	310	dev_err(&client->dev, "i2c functionality check fail.\n");
	311	return -EOPNOTSUPP;
	312	}
	313
	314	if (pdata == NULL) {
	315	dev_err(&client->dev, "needs Platform Data.\n");
	316	return -ENODATA;
	317	}
	318
	319	chip = devm_kzalloc(&client->dev,
	320	sizeof(struct lm3642_chip_data), GFP_KERNEL);
	321	if (!chip)
	322	return -ENOMEM;
	323
	324	chip->dev = &client->dev;
	325	chip->pdata = pdata;
	326
	327	chip->tx_pin = pdata->tx_pin;
	328	chip->torch_pin = pdata->torch_pin;
	329	chip->strobe_pin = pdata->strobe_pin;
	330
	331	chip->regmap = devm_regmap_init_i2c(client, &lm3642_regmap);
	332	if (IS_ERR(chip->regmap)) {
	333	err = PTR_ERR(chip->regmap);
	334	dev_err(&client->dev, "Failed to allocate register map: %d\n",
	335	err);
	336	return err;
	337	}
	338
	339	mutex_init(&chip->lock);
	340	i2c_set_clientdata(client, chip);
	341
	342	err = lm3642_chip_init(chip);
	343	if (err < 0)
	344	goto err_out;
	345
	346	/* flash */
8b7cfbec SJ	347	chip->cdev_flash.name = "flash";
8b7cfbec SJ	348	chip->cdev_flash.max_brightness = 16;
bb58cc81	349	chip->cdev_flash.brightness_set_blocking = lm3642_strobe_brightness_set;
313bf0b1	350	chip->cdev_flash.default_trigger = "flash";
fe29a3b0	351	chip->cdev_flash.groups = lm3642_flash_groups,
8b7cfbec SJ	352	err = led_classdev_register((struct device *)
	353	&client->dev, &chip->cdev_flash);
	354	if (err < 0) {
	355	dev_err(chip->dev, "failed to register flash\n");
	356	goto err_out;
	357	}
8b7cfbec SJ	358
8b7cfbec SJ	359	/* torch */
8b7cfbec SJ	360	chip->cdev_torch.name = "torch";
8b7cfbec SJ	361	chip->cdev_torch.max_brightness = 8;
bb58cc81	362	chip->cdev_torch.brightness_set_blocking = lm3642_torch_brightness_set;
313bf0b1	363	chip->cdev_torch.default_trigger = "torch";
fe29a3b0	364	chip->cdev_torch.groups = lm3642_torch_groups,
8b7cfbec SJ	365	err = led_classdev_register((struct device *)
	366	&client->dev, &chip->cdev_torch);
	367	if (err < 0) {
	368	dev_err(chip->dev, "failed to register torch\n");
	369	goto err_create_torch_file;
	370	}
8b7cfbec SJ	371
8b7cfbec SJ	372	/* indicator */
8b7cfbec SJ	373	chip->cdev_indicator.name = "indicator";
8b7cfbec SJ	374	chip->cdev_indicator.max_brightness = 8;
bb58cc81 AL	375	chip->cdev_indicator.brightness_set_blocking =
bb58cc81 AL	376	lm3642_indicator_brightness_set;
8b7cfbec SJ	377	err = led_classdev_register((struct device *)
	378	&client->dev, &chip->cdev_indicator);
	379	if (err < 0) {
	380	dev_err(chip->dev, "failed to register indicator\n");
	381	goto err_create_indicator_file;
	382	}
	383
	384	dev_info(&client->dev, "LM3642 is initialized\n");
	385	return 0;
	386
	387	err_create_indicator_file:
8b7cfbec SJ	388	led_classdev_unregister(&chip->cdev_torch);
8b7cfbec SJ	389	err_create_torch_file:
8b7cfbec SJ	390	led_classdev_unregister(&chip->cdev_flash);
	391	err_out:
	392	return err;
	393	}
	394
678e8a6b	395	static int lm3642_remove(struct i2c_client *client)
8b7cfbec SJ	396	{
	397	struct lm3642_chip_data *chip = i2c_get_clientdata(client);
	398
	399	led_classdev_unregister(&chip->cdev_indicator);
8b7cfbec	400	led_classdev_unregister(&chip->cdev_torch);
8b7cfbec	401	led_classdev_unregister(&chip->cdev_flash);
8b7cfbec SJ	402	regmap_write(chip->regmap, REG_ENABLE, 0);
	403	return 0;
	404	}
	405
	406	static const struct i2c_device_id lm3642_id[] = {
	407	{LM3642_NAME, 0},
	408	{}
	409	};
	410
	411	MODULE_DEVICE_TABLE(i2c, lm3642_id);
	412
	413	static struct i2c_driver lm3642_i2c_driver = {
	414	.driver = {
	415	.name = LM3642_NAME,
8b7cfbec SJ	416	.pm = NULL,
	417	},
	418	.probe = lm3642_probe,
df07cf81	419	.remove = lm3642_remove,
8b7cfbec SJ	420	.id_table = lm3642_id,
	421	};
	422
	423	module_i2c_driver(lm3642_i2c_driver);
	424
	425	MODULE_DESCRIPTION("Texas Instruments Flash Lighting driver for LM3642");
	426	MODULE_AUTHOR("Daniel Jeong <daniel.jeong@ti.com>");
	427	MODULE_AUTHOR("G.Shark Jeong <gshark.jeong@gmail.com>");
	428	MODULE_LICENSE("GPL v2");