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

/*
* Simple driver for Texas Instruments LM355x LED Flash driver chip
* Copyright (C) 2012 Texas Instruments
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/

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