G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 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> |
| 19 | #include <linux/workqueue.h> |
| 20 | #include <linux/platform_data/leds-lm355x.h> |
| 21 | |
| 22 | enum lm355x_type { |
| 23 | CHIP_LM3554 = 0, |
| 24 | CHIP_LM3556, |
| 25 | }; |
| 26 | |
| 27 | enum lm355x_regs { |
| 28 | REG_FLAG = 0, |
| 29 | REG_TORCH_CFG, |
| 30 | REG_TORCH_CTRL, |
| 31 | REG_STROBE_CFG, |
| 32 | REG_FLASH_CTRL, |
| 33 | REG_INDI_CFG, |
| 34 | REG_INDI_CTRL, |
| 35 | REG_OPMODE, |
| 36 | REG_MAX, |
| 37 | }; |
| 38 | |
| 39 | /* operation mode */ |
| 40 | enum lm355x_mode { |
| 41 | MODE_SHDN = 0, |
| 42 | MODE_INDIC, |
| 43 | MODE_TORCH, |
| 44 | MODE_FLASH |
| 45 | }; |
| 46 | |
| 47 | /* register map info. */ |
| 48 | struct lm355x_reg_data { |
| 49 | u8 regno; |
| 50 | u8 mask; |
| 51 | u8 shift; |
| 52 | }; |
| 53 | |
| 54 | struct lm355x_chip_data { |
| 55 | struct device *dev; |
| 56 | enum lm355x_type type; |
| 57 | |
| 58 | struct led_classdev cdev_flash; |
| 59 | struct led_classdev cdev_torch; |
| 60 | struct led_classdev cdev_indicator; |
| 61 | |
| 62 | struct work_struct work_flash; |
| 63 | struct work_struct work_torch; |
| 64 | struct work_struct work_indicator; |
| 65 | |
| 66 | u8 br_flash; |
| 67 | u8 br_torch; |
| 68 | u8 br_indicator; |
| 69 | |
| 70 | struct lm355x_platform_data *pdata; |
| 71 | struct regmap *regmap; |
| 72 | struct mutex lock; |
| 73 | |
| 74 | unsigned int last_flag; |
| 75 | struct lm355x_reg_data *regs; |
| 76 | }; |
| 77 | |
| 78 | /* specific indicator function for lm3556 */ |
| 79 | enum lm3556_indic_pulse_time { |
| 80 | PULSE_TIME_0_MS = 0, |
| 81 | PULSE_TIME_32_MS, |
| 82 | PULSE_TIME_64_MS, |
| 83 | PULSE_TIME_92_MS, |
| 84 | PULSE_TIME_128_MS, |
| 85 | PULSE_TIME_160_MS, |
| 86 | PULSE_TIME_196_MS, |
| 87 | PULSE_TIME_224_MS, |
| 88 | PULSE_TIME_256_MS, |
| 89 | PULSE_TIME_288_MS, |
| 90 | PULSE_TIME_320_MS, |
| 91 | PULSE_TIME_352_MS, |
| 92 | PULSE_TIME_384_MS, |
| 93 | PULSE_TIME_416_MS, |
| 94 | PULSE_TIME_448_MS, |
| 95 | PULSE_TIME_480_MS, |
| 96 | }; |
| 97 | |
| 98 | enum lm3556_indic_n_blank { |
| 99 | INDIC_N_BLANK_0 = 0, |
| 100 | INDIC_N_BLANK_1, |
| 101 | INDIC_N_BLANK_2, |
| 102 | INDIC_N_BLANK_3, |
| 103 | INDIC_N_BLANK_4, |
| 104 | INDIC_N_BLANK_5, |
| 105 | INDIC_N_BLANK_6, |
| 106 | INDIC_N_BLANK_7, |
| 107 | INDIC_N_BLANK_8, |
| 108 | INDIC_N_BLANK_9, |
| 109 | INDIC_N_BLANK_10, |
| 110 | INDIC_N_BLANK_11, |
| 111 | INDIC_N_BLANK_12, |
| 112 | INDIC_N_BLANK_13, |
| 113 | INDIC_N_BLANK_14, |
| 114 | INDIC_N_BLANK_15, |
| 115 | }; |
| 116 | |
| 117 | enum lm3556_indic_period { |
| 118 | INDIC_PERIOD_0 = 0, |
| 119 | INDIC_PERIOD_1, |
| 120 | INDIC_PERIOD_2, |
| 121 | INDIC_PERIOD_3, |
| 122 | INDIC_PERIOD_4, |
| 123 | INDIC_PERIOD_5, |
| 124 | INDIC_PERIOD_6, |
| 125 | INDIC_PERIOD_7, |
| 126 | }; |
| 127 | |
| 128 | #define INDIC_PATTERN_SIZE 4 |
| 129 | |
| 130 | struct indicator { |
| 131 | u8 blinking; |
| 132 | u8 period_cnt; |
| 133 | }; |
| 134 | |
| 135 | /* indicator pattern data only for lm3556 */ |
| 136 | static struct indicator indicator_pattern[INDIC_PATTERN_SIZE] = { |
| 137 | [0] = {(INDIC_N_BLANK_1 << 4) | PULSE_TIME_32_MS, INDIC_PERIOD_1}, |
| 138 | [1] = {(INDIC_N_BLANK_15 << 4) | PULSE_TIME_32_MS, INDIC_PERIOD_2}, |
| 139 | [2] = {(INDIC_N_BLANK_10 << 4) | PULSE_TIME_32_MS, INDIC_PERIOD_4}, |
| 140 | [3] = {(INDIC_N_BLANK_5 << 4) | PULSE_TIME_32_MS, INDIC_PERIOD_7}, |
| 141 | }; |
| 142 | |
| 143 | static struct lm355x_reg_data lm3554_regs[REG_MAX] = { |
| 144 | [REG_FLAG] = {0xD0, 0xBF, 0}, |
| 145 | [REG_TORCH_CFG] = {0xE0, 0x80, 7}, |
| 146 | [REG_TORCH_CTRL] = {0xA0, 0x38, 3}, |
| 147 | [REG_STROBE_CFG] = {0xE0, 0x04, 2}, |
| 148 | [REG_FLASH_CTRL] = {0xB0, 0x78, 3}, |
| 149 | [REG_INDI_CFG] = {0xE0, 0x08, 3}, |
| 150 | [REG_INDI_CTRL] = {0xA0, 0xC0, 6}, |
| 151 | [REG_OPMODE] = {0xA0, 0x03, 0}, |
| 152 | }; |
| 153 | |
| 154 | static struct lm355x_reg_data lm3556_regs[REG_MAX] = { |
| 155 | [REG_FLAG] = {0x0B, 0xFF, 0}, |
| 156 | [REG_TORCH_CFG] = {0x0A, 0x10, 4}, |
| 157 | [REG_TORCH_CTRL] = {0x09, 0x70, 4}, |
| 158 | [REG_STROBE_CFG] = {0x0A, 0x20, 5}, |
| 159 | [REG_FLASH_CTRL] = {0x09, 0x0F, 0}, |
| 160 | [REG_INDI_CFG] = {0xFF, 0xFF, 0}, |
| 161 | [REG_INDI_CTRL] = {0x09, 0x70, 4}, |
| 162 | [REG_OPMODE] = {0x0A, 0x03, 0}, |
| 163 | }; |
| 164 | |
| 165 | static char lm355x_name[][I2C_NAME_SIZE] = { |
| 166 | [CHIP_LM3554] = LM3554_NAME, |
| 167 | [CHIP_LM3556] = LM3556_NAME, |
| 168 | }; |
| 169 | |
| 170 | /* chip initialize */ |
Bill Pemberton | 98ea1ea | 2012-11-19 13:23:02 -0500 | [diff] [blame] | 171 | static int lm355x_chip_init(struct lm355x_chip_data *chip) |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 172 | { |
| 173 | int ret; |
| 174 | unsigned int reg_val; |
| 175 | struct lm355x_platform_data *pdata = chip->pdata; |
| 176 | |
| 177 | /* input and output pins configuration */ |
| 178 | switch (chip->type) { |
| 179 | case CHIP_LM3554: |
| 180 | reg_val = pdata->pin_tx2 | pdata->ntc_pin; |
| 181 | ret = regmap_update_bits(chip->regmap, 0xE0, 0x28, reg_val); |
| 182 | if (ret < 0) |
| 183 | goto out; |
| 184 | reg_val = pdata->pass_mode; |
| 185 | ret = regmap_update_bits(chip->regmap, 0xA0, 0x04, reg_val); |
| 186 | if (ret < 0) |
| 187 | goto out; |
| 188 | break; |
| 189 | |
| 190 | case CHIP_LM3556: |
| 191 | reg_val = pdata->pin_tx2 | pdata->ntc_pin | pdata->pass_mode; |
| 192 | ret = regmap_update_bits(chip->regmap, 0x0A, 0xC4, reg_val); |
| 193 | if (ret < 0) |
| 194 | goto out; |
| 195 | break; |
| 196 | default: |
| 197 | return -ENODATA; |
| 198 | } |
| 199 | |
| 200 | return ret; |
| 201 | out: |
| 202 | dev_err(chip->dev, "%s:i2c access fail to register\n", __func__); |
| 203 | return ret; |
| 204 | } |
| 205 | |
| 206 | /* chip control */ |
| 207 | static void lm355x_control(struct lm355x_chip_data *chip, |
| 208 | u8 brightness, enum lm355x_mode opmode) |
| 209 | { |
| 210 | int ret; |
| 211 | unsigned int reg_val; |
| 212 | struct lm355x_platform_data *pdata = chip->pdata; |
| 213 | struct lm355x_reg_data *preg = chip->regs; |
| 214 | |
| 215 | ret = regmap_read(chip->regmap, preg[REG_FLAG].regno, &chip->last_flag); |
| 216 | if (ret < 0) |
| 217 | goto out; |
| 218 | if (chip->last_flag & preg[REG_FLAG].mask) |
| 219 | dev_info(chip->dev, "%s Last FLAG is 0x%x\n", |
| 220 | lm355x_name[chip->type], |
| 221 | chip->last_flag & preg[REG_FLAG].mask); |
| 222 | /* brightness 0 means shutdown */ |
| 223 | if (!brightness) |
| 224 | opmode = MODE_SHDN; |
| 225 | |
| 226 | switch (opmode) { |
| 227 | case MODE_TORCH: |
| 228 | ret = |
| 229 | regmap_update_bits(chip->regmap, preg[REG_TORCH_CTRL].regno, |
| 230 | preg[REG_TORCH_CTRL].mask, |
| 231 | (brightness - 1) |
| 232 | << preg[REG_TORCH_CTRL].shift); |
| 233 | if (ret < 0) |
| 234 | goto out; |
| 235 | |
| 236 | if (pdata->pin_tx1 != LM355x_PIN_TORCH_DISABLE) { |
| 237 | ret = |
| 238 | regmap_update_bits(chip->regmap, |
| 239 | preg[REG_TORCH_CFG].regno, |
| 240 | preg[REG_TORCH_CFG].mask, |
| 241 | 0x01 << |
| 242 | preg[REG_TORCH_CFG].shift); |
| 243 | if (ret < 0) |
| 244 | goto out; |
| 245 | opmode = MODE_SHDN; |
| 246 | dev_info(chip->dev, |
| 247 | "torch brt is set - ext. torch pin mode\n"); |
| 248 | } |
| 249 | break; |
| 250 | |
| 251 | case MODE_FLASH: |
| 252 | |
| 253 | ret = |
| 254 | regmap_update_bits(chip->regmap, preg[REG_FLASH_CTRL].regno, |
| 255 | preg[REG_FLASH_CTRL].mask, |
| 256 | (brightness - 1) |
| 257 | << preg[REG_FLASH_CTRL].shift); |
| 258 | if (ret < 0) |
| 259 | goto out; |
| 260 | |
| 261 | if (pdata->pin_strobe != LM355x_PIN_STROBE_DISABLE) { |
| 262 | if (chip->type == CHIP_LM3554) |
| 263 | reg_val = 0x00; |
| 264 | else |
| 265 | reg_val = 0x01; |
| 266 | ret = |
| 267 | regmap_update_bits(chip->regmap, |
| 268 | preg[REG_STROBE_CFG].regno, |
| 269 | preg[REG_STROBE_CFG].mask, |
| 270 | reg_val << |
| 271 | preg[REG_STROBE_CFG].shift); |
| 272 | if (ret < 0) |
| 273 | goto out; |
| 274 | opmode = MODE_SHDN; |
| 275 | dev_info(chip->dev, |
| 276 | "flash brt is set - ext. strobe pin mode\n"); |
| 277 | } |
| 278 | break; |
| 279 | |
| 280 | case MODE_INDIC: |
| 281 | ret = |
| 282 | regmap_update_bits(chip->regmap, preg[REG_INDI_CTRL].regno, |
| 283 | preg[REG_INDI_CTRL].mask, |
| 284 | (brightness - 1) |
| 285 | << preg[REG_INDI_CTRL].shift); |
| 286 | if (ret < 0) |
| 287 | goto out; |
| 288 | |
| 289 | if (pdata->pin_tx2 != LM355x_PIN_TX_DISABLE) { |
| 290 | ret = |
| 291 | regmap_update_bits(chip->regmap, |
| 292 | preg[REG_INDI_CFG].regno, |
| 293 | preg[REG_INDI_CFG].mask, |
| 294 | 0x01 << |
| 295 | preg[REG_INDI_CFG].shift); |
| 296 | if (ret < 0) |
| 297 | goto out; |
| 298 | opmode = MODE_SHDN; |
| 299 | } |
| 300 | break; |
| 301 | case MODE_SHDN: |
| 302 | break; |
| 303 | default: |
| 304 | return; |
| 305 | } |
| 306 | /* operation mode control */ |
| 307 | ret = regmap_update_bits(chip->regmap, preg[REG_OPMODE].regno, |
| 308 | preg[REG_OPMODE].mask, |
| 309 | opmode << preg[REG_OPMODE].shift); |
| 310 | if (ret < 0) |
| 311 | goto out; |
| 312 | return; |
| 313 | out: |
| 314 | dev_err(chip->dev, "%s:i2c access fail to register\n", __func__); |
| 315 | return; |
| 316 | } |
| 317 | |
| 318 | /* torch */ |
| 319 | static void lm355x_deferred_torch_brightness_set(struct work_struct *work) |
| 320 | { |
| 321 | struct lm355x_chip_data *chip = |
| 322 | container_of(work, struct lm355x_chip_data, work_torch); |
| 323 | |
| 324 | mutex_lock(&chip->lock); |
| 325 | lm355x_control(chip, chip->br_torch, MODE_TORCH); |
| 326 | mutex_unlock(&chip->lock); |
| 327 | } |
| 328 | |
| 329 | static void lm355x_torch_brightness_set(struct led_classdev *cdev, |
| 330 | enum led_brightness brightness) |
| 331 | { |
| 332 | struct lm355x_chip_data *chip = |
| 333 | container_of(cdev, struct lm355x_chip_data, cdev_torch); |
| 334 | |
| 335 | chip->br_torch = brightness; |
| 336 | schedule_work(&chip->work_torch); |
| 337 | } |
| 338 | |
| 339 | /* flash */ |
| 340 | static void lm355x_deferred_strobe_brightness_set(struct work_struct *work) |
| 341 | { |
| 342 | struct lm355x_chip_data *chip = |
| 343 | container_of(work, struct lm355x_chip_data, work_flash); |
| 344 | |
| 345 | mutex_lock(&chip->lock); |
| 346 | lm355x_control(chip, chip->br_flash, MODE_FLASH); |
| 347 | mutex_unlock(&chip->lock); |
| 348 | } |
| 349 | |
| 350 | static void lm355x_strobe_brightness_set(struct led_classdev *cdev, |
| 351 | enum led_brightness brightness) |
| 352 | { |
| 353 | struct lm355x_chip_data *chip = |
| 354 | container_of(cdev, struct lm355x_chip_data, cdev_flash); |
| 355 | |
| 356 | chip->br_flash = brightness; |
| 357 | schedule_work(&chip->work_flash); |
| 358 | } |
| 359 | |
| 360 | /* indicator */ |
| 361 | static void lm355x_deferred_indicator_brightness_set(struct work_struct *work) |
| 362 | { |
| 363 | struct lm355x_chip_data *chip = |
| 364 | container_of(work, struct lm355x_chip_data, work_indicator); |
| 365 | |
| 366 | mutex_lock(&chip->lock); |
| 367 | lm355x_control(chip, chip->br_indicator, MODE_INDIC); |
| 368 | mutex_unlock(&chip->lock); |
| 369 | } |
| 370 | |
| 371 | static void lm355x_indicator_brightness_set(struct led_classdev *cdev, |
| 372 | enum led_brightness brightness) |
| 373 | { |
| 374 | struct lm355x_chip_data *chip = |
| 375 | container_of(cdev, struct lm355x_chip_data, cdev_indicator); |
| 376 | |
| 377 | chip->br_indicator = brightness; |
| 378 | schedule_work(&chip->work_indicator); |
| 379 | } |
| 380 | |
| 381 | /* indicator pattern only for lm3556*/ |
| 382 | static ssize_t lm3556_indicator_pattern_store(struct device *dev, |
| 383 | struct device_attribute *devAttr, |
| 384 | const char *buf, size_t size) |
| 385 | { |
| 386 | ssize_t ret; |
| 387 | struct led_classdev *led_cdev = dev_get_drvdata(dev); |
| 388 | struct lm355x_chip_data *chip = |
| 389 | container_of(led_cdev, struct lm355x_chip_data, cdev_indicator); |
| 390 | unsigned int state; |
| 391 | |
| 392 | ret = kstrtouint(buf, 10, &state); |
| 393 | if (ret) |
| 394 | goto out; |
| 395 | if (state > INDIC_PATTERN_SIZE - 1) |
| 396 | state = INDIC_PATTERN_SIZE - 1; |
| 397 | |
| 398 | ret = regmap_write(chip->regmap, 0x04, |
| 399 | indicator_pattern[state].blinking); |
| 400 | if (ret < 0) |
| 401 | goto out; |
| 402 | |
| 403 | ret = regmap_write(chip->regmap, 0x05, |
| 404 | indicator_pattern[state].period_cnt); |
| 405 | if (ret < 0) |
| 406 | goto out; |
| 407 | |
| 408 | return size; |
| 409 | out: |
| 410 | dev_err(chip->dev, "%s:i2c access fail to register\n", __func__); |
Axel Lin | 14ce82e | 2012-10-07 09:05:36 -0700 | [diff] [blame] | 411 | return ret; |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 412 | } |
| 413 | |
Axel Lin | 5bbf150 | 2012-10-29 01:40:21 -0700 | [diff] [blame] | 414 | static DEVICE_ATTR(pattern, S_IWUSR, NULL, lm3556_indicator_pattern_store); |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 415 | |
| 416 | static const struct regmap_config lm355x_regmap = { |
| 417 | .reg_bits = 8, |
| 418 | .val_bits = 8, |
| 419 | .max_register = 0xFF, |
| 420 | }; |
| 421 | |
| 422 | /* module initialize */ |
Bill Pemberton | 98ea1ea | 2012-11-19 13:23:02 -0500 | [diff] [blame] | 423 | static int lm355x_probe(struct i2c_client *client, |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 424 | const struct i2c_device_id *id) |
| 425 | { |
| 426 | struct lm355x_platform_data *pdata = client->dev.platform_data; |
| 427 | struct lm355x_chip_data *chip; |
| 428 | |
| 429 | int err; |
| 430 | |
| 431 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { |
| 432 | dev_err(&client->dev, "i2c functionality check fail.\n"); |
| 433 | return -EOPNOTSUPP; |
| 434 | } |
| 435 | |
| 436 | if (pdata == NULL) { |
| 437 | dev_err(&client->dev, "needs Platform Data.\n"); |
| 438 | return -ENODATA; |
| 439 | } |
| 440 | |
| 441 | chip = devm_kzalloc(&client->dev, |
| 442 | sizeof(struct lm355x_chip_data), GFP_KERNEL); |
| 443 | if (!chip) |
| 444 | return -ENOMEM; |
| 445 | |
| 446 | chip->dev = &client->dev; |
| 447 | chip->type = id->driver_data; |
| 448 | switch (id->driver_data) { |
| 449 | case CHIP_LM3554: |
| 450 | chip->regs = lm3554_regs; |
| 451 | break; |
| 452 | case CHIP_LM3556: |
| 453 | chip->regs = lm3556_regs; |
| 454 | break; |
| 455 | default: |
| 456 | return -ENOSYS; |
| 457 | } |
| 458 | chip->pdata = pdata; |
| 459 | |
| 460 | chip->regmap = devm_regmap_init_i2c(client, &lm355x_regmap); |
| 461 | if (IS_ERR(chip->regmap)) { |
| 462 | err = PTR_ERR(chip->regmap); |
| 463 | dev_err(&client->dev, |
| 464 | "Failed to allocate register map: %d\n", err); |
| 465 | return err; |
| 466 | } |
| 467 | |
| 468 | mutex_init(&chip->lock); |
| 469 | i2c_set_clientdata(client, chip); |
| 470 | |
| 471 | err = lm355x_chip_init(chip); |
| 472 | if (err < 0) |
| 473 | goto err_out; |
| 474 | |
| 475 | /* flash */ |
| 476 | INIT_WORK(&chip->work_flash, lm355x_deferred_strobe_brightness_set); |
| 477 | chip->cdev_flash.name = "flash"; |
| 478 | chip->cdev_flash.max_brightness = 16; |
| 479 | chip->cdev_flash.brightness_set = lm355x_strobe_brightness_set; |
| 480 | err = led_classdev_register((struct device *) |
| 481 | &client->dev, &chip->cdev_flash); |
| 482 | if (err < 0) |
| 483 | goto err_out; |
| 484 | /* torch */ |
| 485 | INIT_WORK(&chip->work_torch, lm355x_deferred_torch_brightness_set); |
| 486 | chip->cdev_torch.name = "torch"; |
| 487 | chip->cdev_torch.max_brightness = 8; |
| 488 | chip->cdev_torch.brightness_set = lm355x_torch_brightness_set; |
| 489 | err = led_classdev_register((struct device *) |
| 490 | &client->dev, &chip->cdev_torch); |
| 491 | if (err < 0) |
| 492 | goto err_create_torch_file; |
| 493 | /* indicator */ |
| 494 | INIT_WORK(&chip->work_indicator, |
| 495 | lm355x_deferred_indicator_brightness_set); |
| 496 | chip->cdev_indicator.name = "indicator"; |
| 497 | if (id->driver_data == CHIP_LM3554) |
| 498 | chip->cdev_indicator.max_brightness = 4; |
| 499 | else |
| 500 | chip->cdev_indicator.max_brightness = 8; |
| 501 | chip->cdev_indicator.brightness_set = lm355x_indicator_brightness_set; |
| 502 | err = led_classdev_register((struct device *) |
| 503 | &client->dev, &chip->cdev_indicator); |
| 504 | if (err < 0) |
| 505 | goto err_create_indicator_file; |
| 506 | /* indicator pattern control only for LM3554 */ |
| 507 | if (id->driver_data == CHIP_LM3556) { |
| 508 | err = |
| 509 | device_create_file(chip->cdev_indicator.dev, |
| 510 | &dev_attr_pattern); |
| 511 | if (err < 0) |
| 512 | goto err_create_pattern_file; |
| 513 | } |
| 514 | |
| 515 | dev_info(&client->dev, "%s is initialized\n", |
| 516 | lm355x_name[id->driver_data]); |
| 517 | return 0; |
| 518 | |
| 519 | err_create_pattern_file: |
| 520 | led_classdev_unregister(&chip->cdev_indicator); |
| 521 | err_create_indicator_file: |
| 522 | led_classdev_unregister(&chip->cdev_torch); |
| 523 | err_create_torch_file: |
| 524 | led_classdev_unregister(&chip->cdev_flash); |
| 525 | err_out: |
| 526 | return err; |
| 527 | } |
| 528 | |
Bill Pemberton | 678e8a6 | 2012-11-19 13:26:00 -0500 | [diff] [blame] | 529 | static int lm355x_remove(struct i2c_client *client) |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 530 | { |
| 531 | struct lm355x_chip_data *chip = i2c_get_clientdata(client); |
| 532 | struct lm355x_reg_data *preg = chip->regs; |
| 533 | |
| 534 | regmap_write(chip->regmap, preg[REG_OPMODE].regno, 0); |
| 535 | if (chip->type == CHIP_LM3556) |
| 536 | device_remove_file(chip->cdev_indicator.dev, &dev_attr_pattern); |
| 537 | led_classdev_unregister(&chip->cdev_indicator); |
| 538 | flush_work(&chip->work_indicator); |
| 539 | led_classdev_unregister(&chip->cdev_torch); |
| 540 | flush_work(&chip->work_torch); |
| 541 | led_classdev_unregister(&chip->cdev_flash); |
| 542 | flush_work(&chip->work_flash); |
| 543 | dev_info(&client->dev, "%s is removed\n", lm355x_name[chip->type]); |
| 544 | |
| 545 | return 0; |
| 546 | } |
| 547 | |
| 548 | static const struct i2c_device_id lm355x_id[] = { |
| 549 | {LM3554_NAME, CHIP_LM3554}, |
| 550 | {LM3556_NAME, CHIP_LM3556}, |
| 551 | {} |
| 552 | }; |
| 553 | |
| 554 | MODULE_DEVICE_TABLE(i2c, lm355x_id); |
| 555 | |
| 556 | static struct i2c_driver lm355x_i2c_driver = { |
| 557 | .driver = { |
| 558 | .name = LM355x_NAME, |
| 559 | .owner = THIS_MODULE, |
| 560 | .pm = NULL, |
| 561 | }, |
| 562 | .probe = lm355x_probe, |
Bill Pemberton | df07cf8 | 2012-11-19 13:20:20 -0500 | [diff] [blame] | 563 | .remove = lm355x_remove, |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 564 | .id_table = lm355x_id, |
| 565 | }; |
| 566 | |
| 567 | module_i2c_driver(lm355x_i2c_driver); |
| 568 | |
| 569 | MODULE_DESCRIPTION("Texas Instruments Flash Lighting driver for LM355x"); |
| 570 | MODULE_AUTHOR("Daniel Jeong <daniel.jeong@ti.com>"); |
| 571 | MODULE_AUTHOR("G.Shark Jeong <gshark.jeong@gmail.com>"); |
| 572 | MODULE_LICENSE("GPL v2"); |