Thomas Gleixner | d2912cb | 2019-06-04 10:11:33 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 2 | /* |
| 3 | * Simple driver for Texas Instruments LM355x LED Flash driver chip |
| 4 | * Copyright (C) 2012 Texas Instruments |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 5 | */ |
| 6 | |
| 7 | #include <linux/module.h> |
| 8 | #include <linux/delay.h> |
| 9 | #include <linux/i2c.h> |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 10 | #include <linux/leds.h> |
| 11 | #include <linux/slab.h> |
| 12 | #include <linux/platform_device.h> |
| 13 | #include <linux/fs.h> |
| 14 | #include <linux/regmap.h> |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 15 | #include <linux/platform_data/leds-lm355x.h> |
| 16 | |
| 17 | enum lm355x_type { |
| 18 | CHIP_LM3554 = 0, |
| 19 | CHIP_LM3556, |
| 20 | }; |
| 21 | |
| 22 | enum lm355x_regs { |
| 23 | REG_FLAG = 0, |
| 24 | REG_TORCH_CFG, |
| 25 | REG_TORCH_CTRL, |
| 26 | REG_STROBE_CFG, |
| 27 | REG_FLASH_CTRL, |
| 28 | REG_INDI_CFG, |
| 29 | REG_INDI_CTRL, |
| 30 | REG_OPMODE, |
| 31 | REG_MAX, |
| 32 | }; |
| 33 | |
| 34 | /* operation mode */ |
| 35 | enum lm355x_mode { |
| 36 | MODE_SHDN = 0, |
| 37 | MODE_INDIC, |
| 38 | MODE_TORCH, |
| 39 | MODE_FLASH |
| 40 | }; |
| 41 | |
| 42 | /* register map info. */ |
| 43 | struct lm355x_reg_data { |
| 44 | u8 regno; |
| 45 | u8 mask; |
| 46 | u8 shift; |
| 47 | }; |
| 48 | |
| 49 | struct lm355x_chip_data { |
| 50 | struct device *dev; |
| 51 | enum lm355x_type type; |
| 52 | |
| 53 | struct led_classdev cdev_flash; |
| 54 | struct led_classdev cdev_torch; |
| 55 | struct led_classdev cdev_indicator; |
| 56 | |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 57 | struct lm355x_platform_data *pdata; |
| 58 | struct regmap *regmap; |
| 59 | struct mutex lock; |
| 60 | |
| 61 | unsigned int last_flag; |
| 62 | struct lm355x_reg_data *regs; |
| 63 | }; |
| 64 | |
| 65 | /* specific indicator function for lm3556 */ |
| 66 | enum lm3556_indic_pulse_time { |
| 67 | PULSE_TIME_0_MS = 0, |
| 68 | PULSE_TIME_32_MS, |
| 69 | PULSE_TIME_64_MS, |
| 70 | PULSE_TIME_92_MS, |
| 71 | PULSE_TIME_128_MS, |
| 72 | PULSE_TIME_160_MS, |
| 73 | PULSE_TIME_196_MS, |
| 74 | PULSE_TIME_224_MS, |
| 75 | PULSE_TIME_256_MS, |
| 76 | PULSE_TIME_288_MS, |
| 77 | PULSE_TIME_320_MS, |
| 78 | PULSE_TIME_352_MS, |
| 79 | PULSE_TIME_384_MS, |
| 80 | PULSE_TIME_416_MS, |
| 81 | PULSE_TIME_448_MS, |
| 82 | PULSE_TIME_480_MS, |
| 83 | }; |
| 84 | |
| 85 | enum lm3556_indic_n_blank { |
| 86 | INDIC_N_BLANK_0 = 0, |
| 87 | INDIC_N_BLANK_1, |
| 88 | INDIC_N_BLANK_2, |
| 89 | INDIC_N_BLANK_3, |
| 90 | INDIC_N_BLANK_4, |
| 91 | INDIC_N_BLANK_5, |
| 92 | INDIC_N_BLANK_6, |
| 93 | INDIC_N_BLANK_7, |
| 94 | INDIC_N_BLANK_8, |
| 95 | INDIC_N_BLANK_9, |
| 96 | INDIC_N_BLANK_10, |
| 97 | INDIC_N_BLANK_11, |
| 98 | INDIC_N_BLANK_12, |
| 99 | INDIC_N_BLANK_13, |
| 100 | INDIC_N_BLANK_14, |
| 101 | INDIC_N_BLANK_15, |
| 102 | }; |
| 103 | |
| 104 | enum lm3556_indic_period { |
| 105 | INDIC_PERIOD_0 = 0, |
| 106 | INDIC_PERIOD_1, |
| 107 | INDIC_PERIOD_2, |
| 108 | INDIC_PERIOD_3, |
| 109 | INDIC_PERIOD_4, |
| 110 | INDIC_PERIOD_5, |
| 111 | INDIC_PERIOD_6, |
| 112 | INDIC_PERIOD_7, |
| 113 | }; |
| 114 | |
| 115 | #define INDIC_PATTERN_SIZE 4 |
| 116 | |
| 117 | struct indicator { |
| 118 | u8 blinking; |
| 119 | u8 period_cnt; |
| 120 | }; |
| 121 | |
| 122 | /* indicator pattern data only for lm3556 */ |
| 123 | static struct indicator indicator_pattern[INDIC_PATTERN_SIZE] = { |
| 124 | [0] = {(INDIC_N_BLANK_1 << 4) | PULSE_TIME_32_MS, INDIC_PERIOD_1}, |
| 125 | [1] = {(INDIC_N_BLANK_15 << 4) | PULSE_TIME_32_MS, INDIC_PERIOD_2}, |
| 126 | [2] = {(INDIC_N_BLANK_10 << 4) | PULSE_TIME_32_MS, INDIC_PERIOD_4}, |
| 127 | [3] = {(INDIC_N_BLANK_5 << 4) | PULSE_TIME_32_MS, INDIC_PERIOD_7}, |
| 128 | }; |
| 129 | |
| 130 | static struct lm355x_reg_data lm3554_regs[REG_MAX] = { |
| 131 | [REG_FLAG] = {0xD0, 0xBF, 0}, |
| 132 | [REG_TORCH_CFG] = {0xE0, 0x80, 7}, |
| 133 | [REG_TORCH_CTRL] = {0xA0, 0x38, 3}, |
| 134 | [REG_STROBE_CFG] = {0xE0, 0x04, 2}, |
| 135 | [REG_FLASH_CTRL] = {0xB0, 0x78, 3}, |
| 136 | [REG_INDI_CFG] = {0xE0, 0x08, 3}, |
| 137 | [REG_INDI_CTRL] = {0xA0, 0xC0, 6}, |
| 138 | [REG_OPMODE] = {0xA0, 0x03, 0}, |
| 139 | }; |
| 140 | |
| 141 | static struct lm355x_reg_data lm3556_regs[REG_MAX] = { |
| 142 | [REG_FLAG] = {0x0B, 0xFF, 0}, |
| 143 | [REG_TORCH_CFG] = {0x0A, 0x10, 4}, |
| 144 | [REG_TORCH_CTRL] = {0x09, 0x70, 4}, |
| 145 | [REG_STROBE_CFG] = {0x0A, 0x20, 5}, |
| 146 | [REG_FLASH_CTRL] = {0x09, 0x0F, 0}, |
| 147 | [REG_INDI_CFG] = {0xFF, 0xFF, 0}, |
| 148 | [REG_INDI_CTRL] = {0x09, 0x70, 4}, |
| 149 | [REG_OPMODE] = {0x0A, 0x03, 0}, |
| 150 | }; |
| 151 | |
| 152 | static char lm355x_name[][I2C_NAME_SIZE] = { |
| 153 | [CHIP_LM3554] = LM3554_NAME, |
| 154 | [CHIP_LM3556] = LM3556_NAME, |
| 155 | }; |
| 156 | |
| 157 | /* chip initialize */ |
Bill Pemberton | 98ea1ea | 2012-11-19 13:23:02 -0500 | [diff] [blame] | 158 | static int lm355x_chip_init(struct lm355x_chip_data *chip) |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 159 | { |
| 160 | int ret; |
| 161 | unsigned int reg_val; |
| 162 | struct lm355x_platform_data *pdata = chip->pdata; |
| 163 | |
| 164 | /* input and output pins configuration */ |
| 165 | switch (chip->type) { |
| 166 | case CHIP_LM3554: |
Arnd Bergmann | 985b1f5 | 2020-05-05 16:19:17 +0200 | [diff] [blame] | 167 | reg_val = (u32)pdata->pin_tx2 | (u32)pdata->ntc_pin; |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 168 | ret = regmap_update_bits(chip->regmap, 0xE0, 0x28, reg_val); |
| 169 | if (ret < 0) |
| 170 | goto out; |
Arnd Bergmann | 985b1f5 | 2020-05-05 16:19:17 +0200 | [diff] [blame] | 171 | reg_val = (u32)pdata->pass_mode; |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 172 | ret = regmap_update_bits(chip->regmap, 0xA0, 0x04, reg_val); |
| 173 | if (ret < 0) |
| 174 | goto out; |
| 175 | break; |
| 176 | |
| 177 | case CHIP_LM3556: |
Arnd Bergmann | 985b1f5 | 2020-05-05 16:19:17 +0200 | [diff] [blame] | 178 | reg_val = (u32)pdata->pin_tx2 | (u32)pdata->ntc_pin | |
| 179 | (u32)pdata->pass_mode; |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 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 */ |
Jacek Anaszewski | df8ff5d | 2015-08-20 15:53:10 +0200 | [diff] [blame] | 195 | static int lm355x_control(struct lm355x_chip_data *chip, |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 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: |
Jacek Anaszewski | df8ff5d | 2015-08-20 15:53:10 +0200 | [diff] [blame] | 292 | return -EINVAL; |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 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; |
Jacek Anaszewski | df8ff5d | 2015-08-20 15:53:10 +0200 | [diff] [blame] | 300 | return ret; |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 301 | out: |
| 302 | dev_err(chip->dev, "%s:i2c access fail to register\n", __func__); |
Jacek Anaszewski | df8ff5d | 2015-08-20 15:53:10 +0200 | [diff] [blame] | 303 | return ret; |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 304 | } |
| 305 | |
| 306 | /* torch */ |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 307 | |
Jacek Anaszewski | df8ff5d | 2015-08-20 15:53:10 +0200 | [diff] [blame] | 308 | static int lm355x_torch_brightness_set(struct led_classdev *cdev, |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 309 | enum led_brightness brightness) |
| 310 | { |
| 311 | struct lm355x_chip_data *chip = |
| 312 | container_of(cdev, struct lm355x_chip_data, cdev_torch); |
Jacek Anaszewski | df8ff5d | 2015-08-20 15:53:10 +0200 | [diff] [blame] | 313 | int ret; |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 314 | |
Jacek Anaszewski | df8ff5d | 2015-08-20 15:53:10 +0200 | [diff] [blame] | 315 | mutex_lock(&chip->lock); |
| 316 | ret = lm355x_control(chip, brightness, MODE_TORCH); |
| 317 | mutex_unlock(&chip->lock); |
| 318 | return ret; |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 319 | } |
| 320 | |
| 321 | /* flash */ |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 322 | |
Jacek Anaszewski | df8ff5d | 2015-08-20 15:53:10 +0200 | [diff] [blame] | 323 | static int lm355x_strobe_brightness_set(struct led_classdev *cdev, |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 324 | enum led_brightness brightness) |
| 325 | { |
| 326 | struct lm355x_chip_data *chip = |
| 327 | container_of(cdev, struct lm355x_chip_data, cdev_flash); |
Jacek Anaszewski | df8ff5d | 2015-08-20 15:53:10 +0200 | [diff] [blame] | 328 | int ret; |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 329 | |
Jacek Anaszewski | df8ff5d | 2015-08-20 15:53:10 +0200 | [diff] [blame] | 330 | mutex_lock(&chip->lock); |
| 331 | ret = lm355x_control(chip, brightness, MODE_FLASH); |
| 332 | mutex_unlock(&chip->lock); |
| 333 | return ret; |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 334 | } |
| 335 | |
| 336 | /* indicator */ |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 337 | |
Jacek Anaszewski | df8ff5d | 2015-08-20 15:53:10 +0200 | [diff] [blame] | 338 | static int lm355x_indicator_brightness_set(struct led_classdev *cdev, |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 339 | enum led_brightness brightness) |
| 340 | { |
| 341 | struct lm355x_chip_data *chip = |
| 342 | container_of(cdev, struct lm355x_chip_data, cdev_indicator); |
Jacek Anaszewski | df8ff5d | 2015-08-20 15:53:10 +0200 | [diff] [blame] | 343 | int ret; |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 344 | |
Jacek Anaszewski | df8ff5d | 2015-08-20 15:53:10 +0200 | [diff] [blame] | 345 | mutex_lock(&chip->lock); |
| 346 | ret = lm355x_control(chip, brightness, MODE_INDIC); |
| 347 | mutex_unlock(&chip->lock); |
| 348 | return ret; |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 349 | } |
| 350 | |
| 351 | /* indicator pattern only for lm3556*/ |
Dwaipayan Ray | 5ccfa39 | 2020-12-14 11:12:05 +0530 | [diff] [blame] | 352 | static ssize_t pattern_store(struct device *dev, |
| 353 | struct device_attribute *attr, |
| 354 | const char *buf, size_t size) |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 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__); |
Axel Lin | 14ce82e | 2012-10-07 09:05:36 -0700 | [diff] [blame] | 381 | return ret; |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 382 | } |
| 383 | |
Dwaipayan Ray | 5ccfa39 | 2020-12-14 11:12:05 +0530 | [diff] [blame] | 384 | static DEVICE_ATTR_WO(pattern); |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 385 | |
Johan Hovold | 0d25376 | 2014-06-25 10:08:47 -0700 | [diff] [blame] | 386 | static struct attribute *lm355x_indicator_attrs[] = { |
| 387 | &dev_attr_pattern.attr, |
| 388 | NULL |
| 389 | }; |
| 390 | ATTRIBUTE_GROUPS(lm355x_indicator); |
| 391 | |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 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 */ |
Uwe Kleine-König | 0712cb9 | 2022-11-18 23:40:07 +0100 | [diff] [blame] | 399 | static int lm355x_probe(struct i2c_client *client) |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 400 | { |
Uwe Kleine-König | 0712cb9 | 2022-11-18 23:40:07 +0100 | [diff] [blame] | 401 | const struct i2c_device_id *id = i2c_client_get_device_id(client); |
Jingoo Han | 87aae1e | 2013-07-30 01:07:35 -0700 | [diff] [blame] | 402 | struct lm355x_platform_data *pdata = dev_get_platdata(&client->dev); |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 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 */ |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 452 | chip->cdev_flash.name = "flash"; |
| 453 | chip->cdev_flash.max_brightness = 16; |
Jacek Anaszewski | df8ff5d | 2015-08-20 15:53:10 +0200 | [diff] [blame] | 454 | chip->cdev_flash.brightness_set_blocking = lm355x_strobe_brightness_set; |
Kim, Milo | 313bf0b | 2013-03-14 04:29:26 -0700 | [diff] [blame] | 455 | chip->cdev_flash.default_trigger = "flash"; |
Johan Hovold | b5684a7 | 2020-06-01 15:39:50 +0200 | [diff] [blame] | 456 | err = led_classdev_register(&client->dev, &chip->cdev_flash); |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 457 | if (err < 0) |
| 458 | goto err_out; |
| 459 | /* torch */ |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 460 | chip->cdev_torch.name = "torch"; |
| 461 | chip->cdev_torch.max_brightness = 8; |
Jacek Anaszewski | df8ff5d | 2015-08-20 15:53:10 +0200 | [diff] [blame] | 462 | chip->cdev_torch.brightness_set_blocking = lm355x_torch_brightness_set; |
Kim, Milo | 313bf0b | 2013-03-14 04:29:26 -0700 | [diff] [blame] | 463 | chip->cdev_torch.default_trigger = "torch"; |
Johan Hovold | b5684a7 | 2020-06-01 15:39:50 +0200 | [diff] [blame] | 464 | err = led_classdev_register(&client->dev, &chip->cdev_torch); |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 465 | if (err < 0) |
| 466 | goto err_create_torch_file; |
| 467 | /* indicator */ |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 468 | chip->cdev_indicator.name = "indicator"; |
| 469 | if (id->driver_data == CHIP_LM3554) |
| 470 | chip->cdev_indicator.max_brightness = 4; |
| 471 | else |
| 472 | chip->cdev_indicator.max_brightness = 8; |
Jacek Anaszewski | df8ff5d | 2015-08-20 15:53:10 +0200 | [diff] [blame] | 473 | chip->cdev_indicator.brightness_set_blocking = |
| 474 | lm355x_indicator_brightness_set; |
Johan Hovold | 0d25376 | 2014-06-25 10:08:47 -0700 | [diff] [blame] | 475 | /* indicator pattern control only for LM3556 */ |
| 476 | if (id->driver_data == CHIP_LM3556) |
| 477 | chip->cdev_indicator.groups = lm355x_indicator_groups; |
Johan Hovold | b5684a7 | 2020-06-01 15:39:50 +0200 | [diff] [blame] | 478 | err = led_classdev_register(&client->dev, &chip->cdev_indicator); |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 479 | if (err < 0) |
| 480 | goto err_create_indicator_file; |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 481 | |
| 482 | dev_info(&client->dev, "%s is initialized\n", |
| 483 | lm355x_name[id->driver_data]); |
| 484 | return 0; |
| 485 | |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 486 | err_create_indicator_file: |
| 487 | led_classdev_unregister(&chip->cdev_torch); |
| 488 | err_create_torch_file: |
| 489 | led_classdev_unregister(&chip->cdev_flash); |
| 490 | err_out: |
| 491 | return err; |
| 492 | } |
| 493 | |
Uwe Kleine-König | ed5c2f5 | 2022-08-15 10:02:30 +0200 | [diff] [blame] | 494 | static void lm355x_remove(struct i2c_client *client) |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 495 | { |
| 496 | struct lm355x_chip_data *chip = i2c_get_clientdata(client); |
| 497 | struct lm355x_reg_data *preg = chip->regs; |
| 498 | |
| 499 | regmap_write(chip->regmap, preg[REG_OPMODE].regno, 0); |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 500 | led_classdev_unregister(&chip->cdev_indicator); |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 501 | led_classdev_unregister(&chip->cdev_torch); |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 502 | led_classdev_unregister(&chip->cdev_flash); |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 503 | dev_info(&client->dev, "%s is removed\n", lm355x_name[chip->type]); |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 504 | } |
| 505 | |
| 506 | static const struct i2c_device_id lm355x_id[] = { |
| 507 | {LM3554_NAME, CHIP_LM3554}, |
| 508 | {LM3556_NAME, CHIP_LM3556}, |
| 509 | {} |
| 510 | }; |
| 511 | |
| 512 | MODULE_DEVICE_TABLE(i2c, lm355x_id); |
| 513 | |
| 514 | static struct i2c_driver lm355x_i2c_driver = { |
| 515 | .driver = { |
| 516 | .name = LM355x_NAME, |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 517 | .pm = NULL, |
| 518 | }, |
Uwe Kleine-König | 0712cb9 | 2022-11-18 23:40:07 +0100 | [diff] [blame] | 519 | .probe_new = lm355x_probe, |
Bill Pemberton | df07cf8 | 2012-11-19 13:20:20 -0500 | [diff] [blame] | 520 | .remove = lm355x_remove, |
G.Shark Jeong | b98d13c | 2012-09-05 15:05:58 +0800 | [diff] [blame] | 521 | .id_table = lm355x_id, |
| 522 | }; |
| 523 | |
| 524 | module_i2c_driver(lm355x_i2c_driver); |
| 525 | |
| 526 | MODULE_DESCRIPTION("Texas Instruments Flash Lighting driver for LM355x"); |
| 527 | MODULE_AUTHOR("Daniel Jeong <daniel.jeong@ti.com>"); |
| 528 | MODULE_AUTHOR("G.Shark Jeong <gshark.jeong@gmail.com>"); |
| 529 | MODULE_LICENSE("GPL v2"); |