[linux-2.6-block.git] / drivers / leds / leds-lm355x.c

// SPDX-License-Identifier: GPL-2.0-only
/*
* Simple driver for Texas Instruments LM355x LED Flash driver chip
* Copyright (C) 2012 Texas Instruments
*/

#include <linux/module.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/gpio.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-lm355x.h>

enum lm355x_type {
	CHIP_LM3554 = 0,
	CHIP_LM3556,
};

enum lm355x_regs {
	REG_FLAG = 0,
	REG_TORCH_CFG,
	REG_TORCH_CTRL,
	REG_STROBE_CFG,
	REG_FLASH_CTRL,
	REG_INDI_CFG,
	REG_INDI_CTRL,
	REG_OPMODE,
	REG_MAX,
};

/* operation mode */
enum lm355x_mode {
	MODE_SHDN = 0,
	MODE_INDIC,
	MODE_TORCH,
	MODE_FLASH
};

/* register map info. */
struct lm355x_reg_data {
	u8 regno;
	u8 mask;
	u8 shift;
};

struct lm355x_chip_data {
	struct device *dev;
	enum lm355x_type type;

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

	struct lm355x_platform_data *pdata;
	struct regmap *regmap;
	struct mutex lock;

	unsigned int last_flag;
	struct lm355x_reg_data *regs;
};

/* specific indicator function for lm3556 */
enum lm3556_indic_pulse_time {
	PULSE_TIME_0_MS = 0,
	PULSE_TIME_32_MS,
	PULSE_TIME_64_MS,
	PULSE_TIME_92_MS,
	PULSE_TIME_128_MS,
	PULSE_TIME_160_MS,
	PULSE_TIME_196_MS,
	PULSE_TIME_224_MS,
	PULSE_TIME_256_MS,
	PULSE_TIME_288_MS,
	PULSE_TIME_320_MS,
	PULSE_TIME_352_MS,
	PULSE_TIME_384_MS,
	PULSE_TIME_416_MS,
	PULSE_TIME_448_MS,
	PULSE_TIME_480_MS,
};

enum lm3556_indic_n_blank {
	INDIC_N_BLANK_0 = 0,
	INDIC_N_BLANK_1,
	INDIC_N_BLANK_2,
	INDIC_N_BLANK_3,
	INDIC_N_BLANK_4,
	INDIC_N_BLANK_5,
	INDIC_N_BLANK_6,
	INDIC_N_BLANK_7,
	INDIC_N_BLANK_8,
	INDIC_N_BLANK_9,
	INDIC_N_BLANK_10,
	INDIC_N_BLANK_11,
	INDIC_N_BLANK_12,
	INDIC_N_BLANK_13,
	INDIC_N_BLANK_14,
	INDIC_N_BLANK_15,
};

enum lm3556_indic_period {
	INDIC_PERIOD_0 = 0,
	INDIC_PERIOD_1,
	INDIC_PERIOD_2,
	INDIC_PERIOD_3,
	INDIC_PERIOD_4,
	INDIC_PERIOD_5,
	INDIC_PERIOD_6,
	INDIC_PERIOD_7,
};

#define INDIC_PATTERN_SIZE 4

struct indicator {
	u8 blinking;
	u8 period_cnt;
};

/* indicator pattern data only for lm3556 */
static struct indicator indicator_pattern[INDIC_PATTERN_SIZE] = {
	[0] = {(INDIC_N_BLANK_1 << 4) | PULSE_TIME_32_MS, INDIC_PERIOD_1},
	[1] = {(INDIC_N_BLANK_15 << 4) | PULSE_TIME_32_MS, INDIC_PERIOD_2},
	[2] = {(INDIC_N_BLANK_10 << 4) | PULSE_TIME_32_MS, INDIC_PERIOD_4},
	[3] = {(INDIC_N_BLANK_5 << 4) | PULSE_TIME_32_MS, INDIC_PERIOD_7},
};

static struct lm355x_reg_data lm3554_regs[REG_MAX] = {
	[REG_FLAG] = {0xD0, 0xBF, 0},
	[REG_TORCH_CFG] = {0xE0, 0x80, 7},
	[REG_TORCH_CTRL] = {0xA0, 0x38, 3},
	[REG_STROBE_CFG] = {0xE0, 0x04, 2},
	[REG_FLASH_CTRL] = {0xB0, 0x78, 3},
	[REG_INDI_CFG] = {0xE0, 0x08, 3},
	[REG_INDI_CTRL] = {0xA0, 0xC0, 6},
	[REG_OPMODE] = {0xA0, 0x03, 0},
};

static struct lm355x_reg_data lm3556_regs[REG_MAX] = {
	[REG_FLAG] = {0x0B, 0xFF, 0},
	[REG_TORCH_CFG] = {0x0A, 0x10, 4},
	[REG_TORCH_CTRL] = {0x09, 0x70, 4},
	[REG_STROBE_CFG] = {0x0A, 0x20, 5},
	[REG_FLASH_CTRL] = {0x09, 0x0F, 0},
	[REG_INDI_CFG] = {0xFF, 0xFF, 0},
	[REG_INDI_CTRL] = {0x09, 0x70, 4},
	[REG_OPMODE] = {0x0A, 0x03, 0},
};

static char lm355x_name[][I2C_NAME_SIZE] = {
	[CHIP_LM3554] = LM3554_NAME,
	[CHIP_LM3556] = LM3556_NAME,
};

/* chip initialize */
static int lm355x_chip_init(struct lm355x_chip_data *chip)
{
	int ret;
	unsigned int reg_val;
	struct lm355x_platform_data *pdata = chip->pdata;

	/* input and output pins configuration */
	switch (chip->type) {
	case CHIP_LM3554:
		reg_val = pdata->pin_tx2 | pdata->ntc_pin;
		ret = regmap_update_bits(chip->regmap, 0xE0, 0x28, reg_val);
		if (ret < 0)
			goto out;
		reg_val = pdata->pass_mode;
		ret = regmap_update_bits(chip->regmap, 0xA0, 0x04, reg_val);
		if (ret < 0)
			goto out;
		break;

	case CHIP_LM3556:
		reg_val = pdata->pin_tx2 | pdata->ntc_pin | pdata->pass_mode;
		ret = regmap_update_bits(chip->regmap, 0x0A, 0xC4, reg_val);
		if (ret < 0)
			goto out;
		break;
	default:
		return -ENODATA;
	}

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

/* chip control */
static int lm355x_control(struct lm355x_chip_data *chip,
			   u8 brightness, enum lm355x_mode opmode)
{
	int ret;
	unsigned int reg_val;
	struct lm355x_platform_data *pdata = chip->pdata;
	struct lm355x_reg_data *preg = chip->regs;

	ret = regmap_read(chip->regmap, preg[REG_FLAG].regno, &chip->last_flag);
	if (ret < 0)
		goto out;
	if (chip->last_flag & preg[REG_FLAG].mask)
		dev_info(chip->dev, "%s Last FLAG is 0x%x\n",
			 lm355x_name[chip->type],
			 chip->last_flag & preg[REG_FLAG].mask);
	/* brightness 0 means shutdown */
	if (!brightness)
		opmode = MODE_SHDN;

	switch (opmode) {
	case MODE_TORCH:
		ret =
		    regmap_update_bits(chip->regmap, preg[REG_TORCH_CTRL].regno,
				       preg[REG_TORCH_CTRL].mask,
				       (brightness - 1)
				       << preg[REG_TORCH_CTRL].shift);
		if (ret < 0)
			goto out;

		if (pdata->pin_tx1 != LM355x_PIN_TORCH_DISABLE) {
			ret =
			    regmap_update_bits(chip->regmap,
					       preg[REG_TORCH_CFG].regno,
					       preg[REG_TORCH_CFG].mask,
					       0x01 <<
					       preg[REG_TORCH_CFG].shift);
			if (ret < 0)
				goto out;
			opmode = MODE_SHDN;
			dev_info(chip->dev,
				 "torch brt is set - ext. torch pin mode\n");
		}
		break;

	case MODE_FLASH:

		ret =
		    regmap_update_bits(chip->regmap, preg[REG_FLASH_CTRL].regno,
				       preg[REG_FLASH_CTRL].mask,
				       (brightness - 1)
				       << preg[REG_FLASH_CTRL].shift);
		if (ret < 0)
			goto out;

		if (pdata->pin_strobe != LM355x_PIN_STROBE_DISABLE) {
			if (chip->type == CHIP_LM3554)
				reg_val = 0x00;
			else
				reg_val = 0x01;
			ret =
			    regmap_update_bits(chip->regmap,
					       preg[REG_STROBE_CFG].regno,
					       preg[REG_STROBE_CFG].mask,
					       reg_val <<
					       preg[REG_STROBE_CFG].shift);
			if (ret < 0)
				goto out;
			opmode = MODE_SHDN;
			dev_info(chip->dev,
				 "flash brt is set - ext. strobe pin mode\n");
		}
		break;

	case MODE_INDIC:
		ret =
		    regmap_update_bits(chip->regmap, preg[REG_INDI_CTRL].regno,
				       preg[REG_INDI_CTRL].mask,
				       (brightness - 1)
				       << preg[REG_INDI_CTRL].shift);
		if (ret < 0)
			goto out;

		if (pdata->pin_tx2 != LM355x_PIN_TX_DISABLE) {
			ret =
			    regmap_update_bits(chip->regmap,
					       preg[REG_INDI_CFG].regno,
					       preg[REG_INDI_CFG].mask,
					       0x01 <<
					       preg[REG_INDI_CFG].shift);
			if (ret < 0)
				goto out;
			opmode = MODE_SHDN;
		}
		break;
	case MODE_SHDN:
		break;
	default:
		return -EINVAL;
	}
	/* operation mode control */
	ret = regmap_update_bits(chip->regmap, preg[REG_OPMODE].regno,
				 preg[REG_OPMODE].mask,
				 opmode << preg[REG_OPMODE].shift);
	if (ret < 0)
		goto out;
	return ret;
out:
	dev_err(chip->dev, "%s:i2c access fail to register\n", __func__);
	return ret;
}

/* torch */

static int lm355x_torch_brightness_set(struct led_classdev *cdev,
					enum led_brightness brightness)
{
	struct lm355x_chip_data *chip =
	    container_of(cdev, struct lm355x_chip_data, cdev_torch);
	int ret;

	mutex_lock(&chip->lock);
	ret = lm355x_control(chip, brightness, MODE_TORCH);
	mutex_unlock(&chip->lock);
	return ret;
}

/* flash */

static int lm355x_strobe_brightness_set(struct led_classdev *cdev,
					 enum led_brightness brightness)
{
	struct lm355x_chip_data *chip =
	    container_of(cdev, struct lm355x_chip_data, cdev_flash);
	int ret;

	mutex_lock(&chip->lock);
	ret = lm355x_control(chip, brightness, MODE_FLASH);
	mutex_unlock(&chip->lock);
	return ret;
}

/* indicator */

static int lm355x_indicator_brightness_set(struct led_classdev *cdev,
					    enum led_brightness brightness)
{
	struct lm355x_chip_data *chip =
	    container_of(cdev, struct lm355x_chip_data, cdev_indicator);
	int ret;

	mutex_lock(&chip->lock);
	ret = lm355x_control(chip, brightness, MODE_INDIC);
	mutex_unlock(&chip->lock);
	return ret;
}

/* indicator pattern only for lm3556*/
static ssize_t lm3556_indicator_pattern_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 lm355x_chip_data *chip =
	    container_of(led_cdev, struct lm355x_chip_data, cdev_indicator);
	unsigned int state;

	ret = kstrtouint(buf, 10, &state);
	if (ret)
		goto out;
	if (state > INDIC_PATTERN_SIZE - 1)
		state = INDIC_PATTERN_SIZE - 1;

	ret = regmap_write(chip->regmap, 0x04,
			   indicator_pattern[state].blinking);
	if (ret < 0)
		goto out;

	ret = regmap_write(chip->regmap, 0x05,
			   indicator_pattern[state].period_cnt);
	if (ret < 0)
		goto out;

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

static DEVICE_ATTR(pattern, S_IWUSR, NULL, lm3556_indicator_pattern_store);

static struct attribute *lm355x_indicator_attrs[] = {
	&dev_attr_pattern.attr,
	NULL
};
ATTRIBUTE_GROUPS(lm355x_indicator);

static const struct regmap_config lm355x_regmap = {
	.reg_bits = 8,
	.val_bits = 8,
	.max_register = 0xFF,
};

/* module initialize */
static int lm355x_probe(struct i2c_client *client,
				  const struct i2c_device_id *id)
{
	struct lm355x_platform_data *pdata = dev_get_platdata(&client->dev);
	struct lm355x_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 lm355x_chip_data), GFP_KERNEL);
	if (!chip)
		return -ENOMEM;

	chip->dev = &client->dev;
	chip->type = id->driver_data;
	switch (id->driver_data) {
	case CHIP_LM3554:
		chip->regs = lm3554_regs;
		break;
	case CHIP_LM3556:
		chip->regs = lm3556_regs;
		break;
	default:
		return -ENOSYS;
	}
	chip->pdata = pdata;

	chip->regmap = devm_regmap_init_i2c(client, &lm355x_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 = lm355x_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 = lm355x_strobe_brightness_set;
	chip->cdev_flash.default_trigger = "flash";
	err = led_classdev_register((struct device *)
				    &client->dev, &chip->cdev_flash);
	if (err < 0)
		goto err_out;
	/* torch */
	chip->cdev_torch.name = "torch";
	chip->cdev_torch.max_brightness = 8;
	chip->cdev_torch.brightness_set_blocking = lm355x_torch_brightness_set;
	chip->cdev_torch.default_trigger = "torch";
	err = led_classdev_register((struct device *)
				    &client->dev, &chip->cdev_torch);
	if (err < 0)
		goto err_create_torch_file;
	/* indicator */
	chip->cdev_indicator.name = "indicator";
	if (id->driver_data == CHIP_LM3554)
		chip->cdev_indicator.max_brightness = 4;
	else
		chip->cdev_indicator.max_brightness = 8;
	chip->cdev_indicator.brightness_set_blocking =
					lm355x_indicator_brightness_set;
	/* indicator pattern control only for LM3556 */
	if (id->driver_data == CHIP_LM3556)
		chip->cdev_indicator.groups = lm355x_indicator_groups;
	err = led_classdev_register((struct device *)
				    &client->dev, &chip->cdev_indicator);
	if (err < 0)
		goto err_create_indicator_file;

	dev_info(&client->dev, "%s is initialized\n",
		 lm355x_name[id->driver_data]);
	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 lm355x_remove(struct i2c_client *client)
{
	struct lm355x_chip_data *chip = i2c_get_clientdata(client);
	struct lm355x_reg_data *preg = chip->regs;

	regmap_write(chip->regmap, preg[REG_OPMODE].regno, 0);
	led_classdev_unregister(&chip->cdev_indicator);
	led_classdev_unregister(&chip->cdev_torch);
	led_classdev_unregister(&chip->cdev_flash);
	dev_info(&client->dev, "%s is removed\n", lm355x_name[chip->type]);

	return 0;
}

static const struct i2c_device_id lm355x_id[] = {
	{LM3554_NAME, CHIP_LM3554},
	{LM3556_NAME, CHIP_LM3556},
	{}
};

MODULE_DEVICE_TABLE(i2c, lm355x_id);

static struct i2c_driver lm355x_i2c_driver = {
	.driver = {
		   .name = LM355x_NAME,
		   .pm = NULL,
		   },
	.probe = lm355x_probe,
	.remove = lm355x_remove,
	.id_table = lm355x_id,
};

module_i2c_driver(lm355x_i2c_driver);

MODULE_DESCRIPTION("Texas Instruments Flash Lighting driver for LM355x");
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
b98d13c7 SJ	2	/*
	3	* Simple driver for Texas Instruments LM355x LED Flash driver chip
	4	* Copyright (C) 2012 Texas Instruments
b98d13c7 SJ	5	*/
	6
	7	#include <linux/module.h>
	8	#include <linux/delay.h>
	9	#include <linux/i2c.h>
	10	#include <linux/gpio.h>
	11	#include <linux/leds.h>
	12	#include <linux/slab.h>
	13	#include <linux/platform_device.h>
	14	#include <linux/fs.h>
	15	#include <linux/regmap.h>
b98d13c7 SJ	16	#include <linux/platform_data/leds-lm355x.h>
	17
	18	enum lm355x_type {
	19	CHIP_LM3554 = 0,
	20	CHIP_LM3556,
	21	};
	22
	23	enum lm355x_regs {
	24	REG_FLAG = 0,
	25	REG_TORCH_CFG,
	26	REG_TORCH_CTRL,
	27	REG_STROBE_CFG,
	28	REG_FLASH_CTRL,
	29	REG_INDI_CFG,
	30	REG_INDI_CTRL,
	31	REG_OPMODE,
	32	REG_MAX,
	33	};
	34
	35	/* operation mode */
	36	enum lm355x_mode {
	37	MODE_SHDN = 0,
	38	MODE_INDIC,
	39	MODE_TORCH,
	40	MODE_FLASH
	41	};
	42
	43	/* register map info. */
	44	struct lm355x_reg_data {
	45	u8 regno;
	46	u8 mask;
	47	u8 shift;
	48	};
	49
	50	struct lm355x_chip_data {
	51	struct device *dev;
	52	enum lm355x_type type;
	53
	54	struct led_classdev cdev_flash;
	55	struct led_classdev cdev_torch;
	56	struct led_classdev cdev_indicator;
	57
b98d13c7 SJ	58	struct lm355x_platform_data *pdata;
	59	struct regmap *regmap;
	60	struct mutex lock;
	61
	62	unsigned int last_flag;
	63	struct lm355x_reg_data *regs;
	64	};
	65
	66	/* specific indicator function for lm3556 */
	67	enum lm3556_indic_pulse_time {
	68	PULSE_TIME_0_MS = 0,
	69	PULSE_TIME_32_MS,
	70	PULSE_TIME_64_MS,
	71	PULSE_TIME_92_MS,
	72	PULSE_TIME_128_MS,
	73	PULSE_TIME_160_MS,
	74	PULSE_TIME_196_MS,
	75	PULSE_TIME_224_MS,
	76	PULSE_TIME_256_MS,
	77	PULSE_TIME_288_MS,
	78	PULSE_TIME_320_MS,
	79	PULSE_TIME_352_MS,
	80	PULSE_TIME_384_MS,
	81	PULSE_TIME_416_MS,
	82	PULSE_TIME_448_MS,
	83	PULSE_TIME_480_MS,
	84	};
	85
	86	enum lm3556_indic_n_blank {
	87	INDIC_N_BLANK_0 = 0,
	88	INDIC_N_BLANK_1,
	89	INDIC_N_BLANK_2,
	90	INDIC_N_BLANK_3,
	91	INDIC_N_BLANK_4,
	92	INDIC_N_BLANK_5,
	93	INDIC_N_BLANK_6,
	94	INDIC_N_BLANK_7,
	95	INDIC_N_BLANK_8,
	96	INDIC_N_BLANK_9,
	97	INDIC_N_BLANK_10,
	98	INDIC_N_BLANK_11,
	99	INDIC_N_BLANK_12,
	100	INDIC_N_BLANK_13,
	101	INDIC_N_BLANK_14,
	102	INDIC_N_BLANK_15,
	103	};
	104
	105	enum lm3556_indic_period {
	106	INDIC_PERIOD_0 = 0,
	107	INDIC_PERIOD_1,
	108	INDIC_PERIOD_2,
	109	INDIC_PERIOD_3,
	110	INDIC_PERIOD_4,
	111	INDIC_PERIOD_5,
	112	INDIC_PERIOD_6,
	113	INDIC_PERIOD_7,
	114	};
	115
	116	#define INDIC_PATTERN_SIZE 4
	117
	118	struct indicator {
	119	u8 blinking;
	120	u8 period_cnt;
	121	};
122
123	/* indicator pattern data only for lm3556 */
124	static struct indicator indicator_pattern[INDIC_PATTERN_SIZE] = {
125	[0] = {(INDIC_N_BLANK_1 << 4) \| PULSE_TIME_32_MS, INDIC_PERIOD_1},
126	[1] = {(INDIC_N_BLANK_15 << 4) \| PULSE_TIME_32_MS, INDIC_PERIOD_2},
127	[2] = {(INDIC_N_BLANK_10 << 4) \| PULSE_TIME_32_MS, INDIC_PERIOD_4},
128	[3] = {(INDIC_N_BLANK_5 << 4) \| PULSE_TIME_32_MS, INDIC_PERIOD_7},
129	};
130
131	static struct lm355x_reg_data lm3554_regs[REG_MAX] = {
132	[REG_FLAG] = {0xD0, 0xBF, 0},
133	[REG_TORCH_CFG] = {0xE0, 0x80, 7},
134	[REG_TORCH_CTRL] = {0xA0, 0x38, 3},
135	[REG_STROBE_CFG] = {0xE0, 0x04, 2},
136	[REG_FLASH_CTRL] = {0xB0, 0x78, 3},
137	[REG_INDI_CFG] = {0xE0, 0x08, 3},
138	[REG_INDI_CTRL] = {0xA0, 0xC0, 6},
139	[REG_OPMODE] = {0xA0, 0x03, 0},
140	};
141
142	static struct lm355x_reg_data lm3556_regs[REG_MAX] = {
143	[REG_FLAG] = {0x0B, 0xFF, 0},
144	[REG_TORCH_CFG] = {0x0A, 0x10, 4},
145	[REG_TORCH_CTRL] = {0x09, 0x70, 4},
146	[REG_STROBE_CFG] = {0x0A, 0x20, 5},
147	[REG_FLASH_CTRL] = {0x09, 0x0F, 0},
148	[REG_INDI_CFG] = {0xFF, 0xFF, 0},
149	[REG_INDI_CTRL] = {0x09, 0x70, 4},
150	[REG_OPMODE] = {0x0A, 0x03, 0},
151	};
152
153	static char lm355x_name[][I2C_NAME_SIZE] = {
154	[CHIP_LM3554] = LM3554_NAME,
155	[CHIP_LM3556] = LM3556_NAME,
156	};
157
158	/* chip initialize */
98ea1ea2	159	static int lm355x_chip_init(struct lm355x_chip_data *chip)
b98d13c7 SJ	160	{
	161	int ret;
	162	unsigned int reg_val;
	163	struct lm355x_platform_data *pdata = chip->pdata;
	164
	165	/* input and output pins configuration */
	166	switch (chip->type) {
	167	case CHIP_LM3554:
	168	reg_val = pdata->pin_tx2 \| pdata->ntc_pin;
	169	ret = regmap_update_bits(chip->regmap, 0xE0, 0x28, reg_val);
	170	if (ret < 0)
	171	goto out;
	172	reg_val = pdata->pass_mode;
	173	ret = regmap_update_bits(chip->regmap, 0xA0, 0x04, reg_val);
	174	if (ret < 0)
	175	goto out;
	176	break;
	177
	178	case CHIP_LM3556:
	179	reg_val = pdata->pin_tx2 \| pdata->ntc_pin \| pdata->pass_mode;
	180	ret = regmap_update_bits(chip->regmap, 0x0A, 0xC4, reg_val);
	181	if (ret < 0)
	182	goto out;
	183	break;
	184	default:
	185	return -ENODATA;
	186	}
	187
	188	return ret;
	189	out:
	190	dev_err(chip->dev, "%s:i2c access fail to register\n", __func__);
	191	return ret;
	192	}
	193
	194	/* chip control */
df8ff5d2	195	static int lm355x_control(struct lm355x_chip_data *chip,
b98d13c7 SJ	196	u8 brightness, enum lm355x_mode opmode)
	197	{
	198	int ret;
	199	unsigned int reg_val;
	200	struct lm355x_platform_data *pdata = chip->pdata;
	201	struct lm355x_reg_data *preg = chip->regs;
	202
	203	ret = regmap_read(chip->regmap, preg[REG_FLAG].regno, &chip->last_flag);
	204	if (ret < 0)
	205	goto out;
	206	if (chip->last_flag & preg[REG_FLAG].mask)
	207	dev_info(chip->dev, "%s Last FLAG is 0x%x\n",
	208	lm355x_name[chip->type],
	209	chip->last_flag & preg[REG_FLAG].mask);
	210	/* brightness 0 means shutdown */
	211	if (!brightness)
	212	opmode = MODE_SHDN;
	213
	214	switch (opmode) {
	215	case MODE_TORCH:
	216	ret =
	217	regmap_update_bits(chip->regmap, preg[REG_TORCH_CTRL].regno,
	218	preg[REG_TORCH_CTRL].mask,
	219	(brightness - 1)
	220	<< preg[REG_TORCH_CTRL].shift);
	221	if (ret < 0)
	222	goto out;
	223
	224	if (pdata->pin_tx1 != LM355x_PIN_TORCH_DISABLE) {
	225	ret =
	226	regmap_update_bits(chip->regmap,
	227	preg[REG_TORCH_CFG].regno,
	228	preg[REG_TORCH_CFG].mask,
	229	0x01 <<
	230	preg[REG_TORCH_CFG].shift);
	231	if (ret < 0)
	232	goto out;
	233	opmode = MODE_SHDN;
	234	dev_info(chip->dev,
	235	"torch brt is set - ext. torch pin mode\n");
	236	}
	237	break;
	238
	239	case MODE_FLASH:
	240
	241	ret =
	242	regmap_update_bits(chip->regmap, preg[REG_FLASH_CTRL].regno,
	243	preg[REG_FLASH_CTRL].mask,
	244	(brightness - 1)
	245	<< preg[REG_FLASH_CTRL].shift);
	246	if (ret < 0)
	247	goto out;
	248
	249	if (pdata->pin_strobe != LM355x_PIN_STROBE_DISABLE) {
	250	if (chip->type == CHIP_LM3554)
	251	reg_val = 0x00;
	252	else
	253	reg_val = 0x01;
	254	ret =
	255	regmap_update_bits(chip->regmap,
	256	preg[REG_STROBE_CFG].regno,
	257	preg[REG_STROBE_CFG].mask,
	258	reg_val <<
	259	preg[REG_STROBE_CFG].shift);
260	if (ret < 0)
261	goto out;
262	opmode = MODE_SHDN;
263	dev_info(chip->dev,
264	"flash brt is set - ext. strobe pin mode\n");
265	}
266	break;
267
268	case MODE_INDIC:
269	ret =
270	regmap_update_bits(chip->regmap, preg[REG_INDI_CTRL].regno,
271	preg[REG_INDI_CTRL].mask,
272	(brightness - 1)
273	<< preg[REG_INDI_CTRL].shift);
274	if (ret < 0)
275	goto out;
276
277	if (pdata->pin_tx2 != LM355x_PIN_TX_DISABLE) {
278	ret =
279	regmap_update_bits(chip->regmap,
280	preg[REG_INDI_CFG].regno,
281	preg[REG_INDI_CFG].mask,
282	0x01 <<
283	preg[REG_INDI_CFG].shift);
284	if (ret < 0)
285	goto out;
286	opmode = MODE_SHDN;
287	}
288	break;
289	case MODE_SHDN:
290	break;
291	default:
df8ff5d2	292	return -EINVAL;
b98d13c7 SJ	293	}
	294	/* operation mode control */
	295	ret = regmap_update_bits(chip->regmap, preg[REG_OPMODE].regno,
	296	preg[REG_OPMODE].mask,
	297	opmode << preg[REG_OPMODE].shift);
	298	if (ret < 0)
	299	goto out;
df8ff5d2	300	return ret;
b98d13c7 SJ	301	out:
b98d13c7 SJ	302	dev_err(chip->dev, "%s:i2c access fail to register\n", __func__);
df8ff5d2	303	return ret;
b98d13c7 SJ	304	}
	305
	306	/* torch */
b98d13c7	307
df8ff5d2	308	static int lm355x_torch_brightness_set(struct led_classdev *cdev,
b98d13c7 SJ	309	enum led_brightness brightness)
	310	{
	311	struct lm355x_chip_data *chip =
	312	container_of(cdev, struct lm355x_chip_data, cdev_torch);
df8ff5d2	313	int ret;
b98d13c7 SJ	314
b98d13c7 SJ	315	mutex_lock(&chip->lock);
df8ff5d2	316	ret = lm355x_control(chip, brightness, MODE_TORCH);
b98d13c7	317	mutex_unlock(&chip->lock);
df8ff5d2	318	return ret;
b98d13c7 SJ	319	}
b98d13c7 SJ	320
df8ff5d2 JA	321	/* flash */
	322
	323	static int lm355x_strobe_brightness_set(struct led_classdev *cdev,
b98d13c7 SJ	324	enum led_brightness brightness)
	325	{
	326	struct lm355x_chip_data *chip =
	327	container_of(cdev, struct lm355x_chip_data, cdev_flash);
df8ff5d2	328	int ret;
b98d13c7 SJ	329
b98d13c7 SJ	330	mutex_lock(&chip->lock);
df8ff5d2	331	ret = lm355x_control(chip, brightness, MODE_FLASH);
b98d13c7	332	mutex_unlock(&chip->lock);
df8ff5d2	333	return ret;
b98d13c7 SJ	334	}
b98d13c7 SJ	335
df8ff5d2 JA	336	/* indicator */
	337
	338	static int lm355x_indicator_brightness_set(struct led_classdev *cdev,
b98d13c7 SJ	339	enum led_brightness brightness)
	340	{
	341	struct lm355x_chip_data *chip =
	342	container_of(cdev, struct lm355x_chip_data, cdev_indicator);
df8ff5d2	343	int ret;
b98d13c7	344
df8ff5d2 JA	345	mutex_lock(&chip->lock);
	346	ret = lm355x_control(chip, brightness, MODE_INDIC);
	347	mutex_unlock(&chip->lock);
	348	return ret;
b98d13c7 SJ	349	}
	350
	351	/* indicator pattern only for lm3556*/
	352	static ssize_t lm3556_indicator_pattern_store(struct device *dev,
0c0d9067	353	struct device_attribute *attr,
b98d13c7 SJ	354	const char *buf, size_t size)
	355	{
	356	ssize_t ret;
	357	struct led_classdev *led_cdev = dev_get_drvdata(dev);
	358	struct lm355x_chip_data *chip =
	359	container_of(led_cdev, struct lm355x_chip_data, cdev_indicator);
	360	unsigned int state;
	361
	362	ret = kstrtouint(buf, 10, &state);
	363	if (ret)
	364	goto out;
	365	if (state > INDIC_PATTERN_SIZE - 1)
	366	state = INDIC_PATTERN_SIZE - 1;
	367
	368	ret = regmap_write(chip->regmap, 0x04,
	369	indicator_pattern[state].blinking);
	370	if (ret < 0)
	371	goto out;
	372
	373	ret = regmap_write(chip->regmap, 0x05,
	374	indicator_pattern[state].period_cnt);
	375	if (ret < 0)
	376	goto out;
	377
	378	return size;
	379	out:
	380	dev_err(chip->dev, "%s:i2c access fail to register\n", __func__);
14ce82e5	381	return ret;
b98d13c7 SJ	382	}
b98d13c7 SJ	383
5bbf150c	384	static DEVICE_ATTR(pattern, S_IWUSR, NULL, lm3556_indicator_pattern_store);
b98d13c7	385
0d25376c JH	386	static struct attribute *lm355x_indicator_attrs[] = {
	387	&dev_attr_pattern.attr,
	388	NULL
	389	};
	390	ATTRIBUTE_GROUPS(lm355x_indicator);
	391
b98d13c7 SJ	392	static const struct regmap_config lm355x_regmap = {
	393	.reg_bits = 8,
	394	.val_bits = 8,
	395	.max_register = 0xFF,
	396	};
	397
	398	/* module initialize */
98ea1ea2	399	static int lm355x_probe(struct i2c_client *client,
b98d13c7 SJ	400	const struct i2c_device_id *id)
b98d13c7 SJ	401	{
87aae1ea	402	struct lm355x_platform_data *pdata = dev_get_platdata(&client->dev);
b98d13c7 SJ	403	struct lm355x_chip_data *chip;
	404
	405	int err;
	406
	407	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
	408	dev_err(&client->dev, "i2c functionality check fail.\n");
	409	return -EOPNOTSUPP;
	410	}
	411
	412	if (pdata == NULL) {
	413	dev_err(&client->dev, "needs Platform Data.\n");
	414	return -ENODATA;
	415	}
	416
	417	chip = devm_kzalloc(&client->dev,
	418	sizeof(struct lm355x_chip_data), GFP_KERNEL);
	419	if (!chip)
	420	return -ENOMEM;
	421
	422	chip->dev = &client->dev;
	423	chip->type = id->driver_data;
	424	switch (id->driver_data) {
	425	case CHIP_LM3554:
	426	chip->regs = lm3554_regs;
	427	break;
	428	case CHIP_LM3556:
	429	chip->regs = lm3556_regs;
	430	break;
	431	default:
	432	return -ENOSYS;
	433	}
	434	chip->pdata = pdata;
	435
	436	chip->regmap = devm_regmap_init_i2c(client, &lm355x_regmap);
	437	if (IS_ERR(chip->regmap)) {
	438	err = PTR_ERR(chip->regmap);
	439	dev_err(&client->dev,
	440	"Failed to allocate register map: %d\n", err);
	441	return err;
	442	}
	443
	444	mutex_init(&chip->lock);
	445	i2c_set_clientdata(client, chip);
	446
	447	err = lm355x_chip_init(chip);
	448	if (err < 0)
	449	goto err_out;
	450
	451	/* flash */
b98d13c7 SJ	452	chip->cdev_flash.name = "flash";
b98d13c7 SJ	453	chip->cdev_flash.max_brightness = 16;
df8ff5d2	454	chip->cdev_flash.brightness_set_blocking = lm355x_strobe_brightness_set;
313bf0b1	455	chip->cdev_flash.default_trigger = "flash";
b98d13c7 SJ	456	err = led_classdev_register((struct device *)
	457	&client->dev, &chip->cdev_flash);
	458	if (err < 0)
	459	goto err_out;
	460	/* torch */
b98d13c7 SJ	461	chip->cdev_torch.name = "torch";
b98d13c7 SJ	462	chip->cdev_torch.max_brightness = 8;
df8ff5d2	463	chip->cdev_torch.brightness_set_blocking = lm355x_torch_brightness_set;
313bf0b1	464	chip->cdev_torch.default_trigger = "torch";
b98d13c7 SJ	465	err = led_classdev_register((struct device *)
	466	&client->dev, &chip->cdev_torch);
	467	if (err < 0)
	468	goto err_create_torch_file;
	469	/* indicator */
b98d13c7 SJ	470	chip->cdev_indicator.name = "indicator";
	471	if (id->driver_data == CHIP_LM3554)
	472	chip->cdev_indicator.max_brightness = 4;
	473	else
	474	chip->cdev_indicator.max_brightness = 8;
df8ff5d2 JA	475	chip->cdev_indicator.brightness_set_blocking =
df8ff5d2 JA	476	lm355x_indicator_brightness_set;
0d25376c JH	477	/* indicator pattern control only for LM3556 */
	478	if (id->driver_data == CHIP_LM3556)
	479	chip->cdev_indicator.groups = lm355x_indicator_groups;
b98d13c7 SJ	480	err = led_classdev_register((struct device *)
	481	&client->dev, &chip->cdev_indicator);
	482	if (err < 0)
	483	goto err_create_indicator_file;
b98d13c7 SJ	484
	485	dev_info(&client->dev, "%s is initialized\n",
	486	lm355x_name[id->driver_data]);
	487	return 0;
	488
b98d13c7 SJ	489	err_create_indicator_file:
	490	led_classdev_unregister(&chip->cdev_torch);
	491	err_create_torch_file:
	492	led_classdev_unregister(&chip->cdev_flash);
	493	err_out:
	494	return err;
	495	}
	496
678e8a6b	497	static int lm355x_remove(struct i2c_client *client)
b98d13c7 SJ	498	{
	499	struct lm355x_chip_data *chip = i2c_get_clientdata(client);
	500	struct lm355x_reg_data *preg = chip->regs;
	501
	502	regmap_write(chip->regmap, preg[REG_OPMODE].regno, 0);
b98d13c7	503	led_classdev_unregister(&chip->cdev_indicator);
b98d13c7	504	led_classdev_unregister(&chip->cdev_torch);
b98d13c7	505	led_classdev_unregister(&chip->cdev_flash);
b98d13c7 SJ	506	dev_info(&client->dev, "%s is removed\n", lm355x_name[chip->type]);
	507
	508	return 0;
	509	}
	510
	511	static const struct i2c_device_id lm355x_id[] = {
	512	{LM3554_NAME, CHIP_LM3554},
	513	{LM3556_NAME, CHIP_LM3556},
	514	{}
	515	};
	516
	517	MODULE_DEVICE_TABLE(i2c, lm355x_id);
	518
	519	static struct i2c_driver lm355x_i2c_driver = {
	520	.driver = {
	521	.name = LM355x_NAME,
b98d13c7 SJ	522	.pm = NULL,
	523	},
	524	.probe = lm355x_probe,
df07cf81	525	.remove = lm355x_remove,
b98d13c7 SJ	526	.id_table = lm355x_id,
	527	};
	528
	529	module_i2c_driver(lm355x_i2c_driver);
	530
	531	MODULE_DESCRIPTION("Texas Instruments Flash Lighting driver for LM355x");
	532	MODULE_AUTHOR("Daniel Jeong <daniel.jeong@ti.com>");
	533	MODULE_AUTHOR("G.Shark Jeong <gshark.jeong@gmail.com>");
	534	MODULE_LICENSE("GPL v2");