drivers/leds/leds-lp5562.c

   1 /*
   2  * LP5562 LED driver
   3  *
   4  * Copyright (C) 2013 Texas Instruments
   5  *
   6  * Author: Milo(Woogyom) Kim <milo.kim@ti.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #include <linux/delay.h>
  14 #include <linux/firmware.h>
  15 #include <linux/i2c.h>
  16 #include <linux/leds.h>
  17 #include <linux/module.h>
  18 #include <linux/mutex.h>
  19 #include <linux/of.h>
  20 #include <linux/platform_data/leds-lp55xx.h>
  21 #include <linux/slab.h>
  22
  23 #include "leds-lp55xx-common.h"
  24
  25 #define LP5562_PROGRAM_LENGTH           32
  26 #define LP5562_MAX_LEDS                 4
  27
  28 /* ENABLE Register 00h */
  29 #define LP5562_REG_ENABLE               0x00
  30 #define LP5562_EXEC_ENG1_M              0x30
  31 #define LP5562_EXEC_ENG2_M              0x0C
  32 #define LP5562_EXEC_ENG3_M              0x03
  33 #define LP5562_EXEC_M                   0x3F
  34 #define LP5562_MASTER_ENABLE            0x40    /* Chip master enable */
  35 #define LP5562_LOGARITHMIC_PWM          0x80    /* Logarithmic PWM adjustment */
  36 #define LP5562_EXEC_RUN                 0x2A
  37 #define LP5562_ENABLE_DEFAULT   \
  38         (LP5562_MASTER_ENABLE | LP5562_LOGARITHMIC_PWM)
  39 #define LP5562_ENABLE_RUN_PROGRAM       \
  40         (LP5562_ENABLE_DEFAULT | LP5562_EXEC_RUN)
  41
  42 /* OPMODE Register 01h */
  43 #define LP5562_REG_OP_MODE              0x01
  44 #define LP5562_MODE_ENG1_M              0x30
  45 #define LP5562_MODE_ENG2_M              0x0C
  46 #define LP5562_MODE_ENG3_M              0x03
  47 #define LP5562_LOAD_ENG1                0x10
  48 #define LP5562_LOAD_ENG2                0x04
  49 #define LP5562_LOAD_ENG3                0x01
  50 #define LP5562_RUN_ENG1                 0x20
  51 #define LP5562_RUN_ENG2                 0x08
  52 #define LP5562_RUN_ENG3                 0x02
  53 #define LP5562_ENG1_IS_LOADING(mode)    \
  54         ((mode & LP5562_MODE_ENG1_M) == LP5562_LOAD_ENG1)
  55 #define LP5562_ENG2_IS_LOADING(mode)    \
  56         ((mode & LP5562_MODE_ENG2_M) == LP5562_LOAD_ENG2)
  57 #define LP5562_ENG3_IS_LOADING(mode)    \
  58         ((mode & LP5562_MODE_ENG3_M) == LP5562_LOAD_ENG3)
  59
  60 /* BRIGHTNESS Registers */
  61 #define LP5562_REG_R_PWM                0x04
  62 #define LP5562_REG_G_PWM                0x03
  63 #define LP5562_REG_B_PWM                0x02
  64 #define LP5562_REG_W_PWM                0x0E
  65
  66 /* CURRENT Registers */
  67 #define LP5562_REG_R_CURRENT            0x07
  68 #define LP5562_REG_G_CURRENT            0x06
  69 #define LP5562_REG_B_CURRENT            0x05
  70 #define LP5562_REG_W_CURRENT            0x0F
  71
  72 /* CONFIG Register 08h */
  73 #define LP5562_REG_CONFIG               0x08
  74 #define LP5562_PWM_HF                   0x40
  75 #define LP5562_PWRSAVE_EN               0x20
  76 #define LP5562_CLK_INT                  0x01    /* Internal clock */
  77 #define LP5562_DEFAULT_CFG              (LP5562_PWM_HF | LP5562_PWRSAVE_EN)
  78
  79 /* RESET Register 0Dh */
  80 #define LP5562_REG_RESET                0x0D
  81 #define LP5562_RESET                    0xFF
  82
  83 /* PROGRAM ENGINE Registers */
  84 #define LP5562_REG_PROG_MEM_ENG1        0x10
  85 #define LP5562_REG_PROG_MEM_ENG2        0x30
  86 #define LP5562_REG_PROG_MEM_ENG3        0x50
  87
  88 /* LEDMAP Register 70h */
  89 #define LP5562_REG_ENG_SEL              0x70
  90 #define LP5562_ENG_SEL_PWM              0
  91 #define LP5562_ENG_FOR_RGB_M            0x3F
  92 #define LP5562_ENG_SEL_RGB              0x1B    /* R:ENG1, G:ENG2, B:ENG3 */
  93 #define LP5562_ENG_FOR_W_M              0xC0
  94 #define LP5562_ENG1_FOR_W               0x40    /* W:ENG1 */
  95 #define LP5562_ENG2_FOR_W               0x80    /* W:ENG2 */
  96 #define LP5562_ENG3_FOR_W               0xC0    /* W:ENG3 */
  97
  98 /* Program Commands */
  99 #define LP5562_CMD_DISABLE              0x00
 100 #define LP5562_CMD_LOAD                 0x15
 101 #define LP5562_CMD_RUN                  0x2A
 102 #define LP5562_CMD_DIRECT               0x3F
 103 #define LP5562_PATTERN_OFF              0
 104
 105 static inline void lp5562_wait_opmode_done(void)
 106 {
 107         /* operation mode change needs to be longer than 153 us */
 108         usleep_range(200, 300);
 109 }
 110
 111 static inline void lp5562_wait_enable_done(void)
 112 {
 113         /* it takes more 488 us to update ENABLE register */
 114         usleep_range(500, 600);
 115 }
 116
 117 static void lp5562_set_led_current(struct lp55xx_led *led, u8 led_current)
 118 {
 119         static const u8 addr[] = {
 120                 LP5562_REG_R_CURRENT,
 121                 LP5562_REG_G_CURRENT,
 122                 LP5562_REG_B_CURRENT,
 123                 LP5562_REG_W_CURRENT,
 124         };
 125
 126         led->led_current = led_current;
 127         lp55xx_write(led->chip, addr[led->chan_nr], led_current);
 128 }
 129
 130 static void lp5562_load_engine(struct lp55xx_chip *chip)
 131 {
 132         enum lp55xx_engine_index idx = chip->engine_idx;
 133         static const u8 mask[] = {
 134                 [LP55XX_ENGINE_1] = LP5562_MODE_ENG1_M,
 135                 [LP55XX_ENGINE_2] = LP5562_MODE_ENG2_M,
 136                 [LP55XX_ENGINE_3] = LP5562_MODE_ENG3_M,
 137         };
 138
 139         static const u8 val[] = {
 140                 [LP55XX_ENGINE_1] = LP5562_LOAD_ENG1,
 141                 [LP55XX_ENGINE_2] = LP5562_LOAD_ENG2,
 142                 [LP55XX_ENGINE_3] = LP5562_LOAD_ENG3,
 143         };
 144
 145         lp55xx_update_bits(chip, LP5562_REG_OP_MODE, mask[idx], val[idx]);
 146
 147         lp5562_wait_opmode_done();
 148 }
 149
 150 static void lp5562_stop_engine(struct lp55xx_chip *chip)
 151 {
 152         lp55xx_write(chip, LP5562_REG_OP_MODE, LP5562_CMD_DISABLE);
 153         lp5562_wait_opmode_done();
 154 }
 155
 156 static void lp5562_run_engine(struct lp55xx_chip *chip, bool start)
 157 {
 158         int ret;
 159         u8 mode;
 160         u8 exec;
 161
 162         /* stop engine */
 163         if (!start) {
 164                 lp55xx_write(chip, LP5562_REG_ENABLE, LP5562_ENABLE_DEFAULT);
 165                 lp5562_wait_enable_done();
 166                 lp5562_stop_engine(chip);
 167                 lp55xx_write(chip, LP5562_REG_ENG_SEL, LP5562_ENG_SEL_PWM);
 168                 lp55xx_write(chip, LP5562_REG_OP_MODE, LP5562_CMD_DIRECT);
 169                 lp5562_wait_opmode_done();
 170                 return;
 171         }
 172
 173         /*
 174          * To run the engine,
 175          * operation mode and enable register should updated at the same time
 176          */
 177
 178         ret = lp55xx_read(chip, LP5562_REG_OP_MODE, &mode);
 179         if (ret)
 180                 return;
 181
 182         ret = lp55xx_read(chip, LP5562_REG_ENABLE, &exec);
 183         if (ret)
 184                 return;
 185
 186         /* change operation mode to RUN only when each engine is loading */
 187         if (LP5562_ENG1_IS_LOADING(mode)) {
 188                 mode = (mode & ~LP5562_MODE_ENG1_M) | LP5562_RUN_ENG1;
 189                 exec = (exec & ~LP5562_EXEC_ENG1_M) | LP5562_RUN_ENG1;
 190         }
 191
 192         if (LP5562_ENG2_IS_LOADING(mode)) {
 193                 mode = (mode & ~LP5562_MODE_ENG2_M) | LP5562_RUN_ENG2;
 194                 exec = (exec & ~LP5562_EXEC_ENG2_M) | LP5562_RUN_ENG2;
 195         }
 196
 197         if (LP5562_ENG3_IS_LOADING(mode)) {
 198                 mode = (mode & ~LP5562_MODE_ENG3_M) | LP5562_RUN_ENG3;
 199                 exec = (exec & ~LP5562_EXEC_ENG3_M) | LP5562_RUN_ENG3;
 200         }
 201
 202         lp55xx_write(chip, LP5562_REG_OP_MODE, mode);
 203         lp5562_wait_opmode_done();
 204
 205         lp55xx_update_bits(chip, LP5562_REG_ENABLE, LP5562_EXEC_M, exec);
 206         lp5562_wait_enable_done();
 207 }
 208
 209 static int lp5562_update_firmware(struct lp55xx_chip *chip,
 210                                         const u8 *data, size_t size)
 211 {
 212         enum lp55xx_engine_index idx = chip->engine_idx;
 213         u8 pattern[LP5562_PROGRAM_LENGTH] = {0};
 214         static const u8 addr[] = {
 215                 [LP55XX_ENGINE_1] = LP5562_REG_PROG_MEM_ENG1,
 216                 [LP55XX_ENGINE_2] = LP5562_REG_PROG_MEM_ENG2,
 217                 [LP55XX_ENGINE_3] = LP5562_REG_PROG_MEM_ENG3,
 218         };
 219         unsigned cmd;
 220         char c[3];
 221         int program_size;
 222         int nrchars;
 223         int offset = 0;
 224         int ret;
 225         int i;
 226
 227         /* clear program memory before updating */
 228         for (i = 0; i < LP5562_PROGRAM_LENGTH; i++)
 229                 lp55xx_write(chip, addr[idx] + i, 0);
 230
 231         i = 0;
 232         while ((offset < size - 1) && (i < LP5562_PROGRAM_LENGTH)) {
 233                 /* separate sscanfs because length is working only for %s */
 234                 ret = sscanf(data + offset, "%2s%n ", c, &nrchars);
 235                 if (ret != 1)
 236                         goto err;
 237
 238                 ret = sscanf(c, "%2x", &cmd);
 239                 if (ret != 1)
 240                         goto err;
 241
 242                 pattern[i] = (u8)cmd;
 243                 offset += nrchars;
 244                 i++;
 245         }
 246
 247         /* Each instruction is 16bit long. Check that length is even */
 248         if (i % 2)
 249                 goto err;
 250
 251         program_size = i;
 252         for (i = 0; i < program_size; i++)
 253                 lp55xx_write(chip, addr[idx] + i, pattern[i]);
 254
 255         return 0;
 256
 257 err:
 258         dev_err(&chip->cl->dev, "wrong pattern format\n");
 259         return -EINVAL;
 260 }
 261
 262 static void lp5562_firmware_loaded(struct lp55xx_chip *chip)
 263 {
 264         const struct firmware *fw = chip->fw;
 265
 266         /*
 267          * the firmware is encoded in ascii hex character, with 2 chars
 268          * per byte
 269          */
 270         if (fw->size > (LP5562_PROGRAM_LENGTH * 2)) {
 271                 dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n",
 272                         fw->size);
 273                 return;
 274         }
 275
 276         /*
 277          * Program memory sequence
 278          *  1) set engine mode to "LOAD"
 279          *  2) write firmware data into program memory
 280          */
 281
 282         lp5562_load_engine(chip);
 283         lp5562_update_firmware(chip, fw->data, fw->size);
 284 }
 285
 286 static int lp5562_post_init_device(struct lp55xx_chip *chip)
 287 {
 288         int ret;
 289         u8 cfg = LP5562_DEFAULT_CFG;
 290
 291         /* Set all PWMs to direct control mode */
 292         ret = lp55xx_write(chip, LP5562_REG_OP_MODE, LP5562_CMD_DIRECT);
 293         if (ret)
 294                 return ret;
 295
 296         lp5562_wait_opmode_done();
 297
 298         /* Update configuration for the clock setting */
 299         if (!lp55xx_is_extclk_used(chip))
 300                 cfg |= LP5562_CLK_INT;
 301
 302         ret = lp55xx_write(chip, LP5562_REG_CONFIG, cfg);
 303         if (ret)
 304                 return ret;
 305
 306         /* Initialize all channels PWM to zero -> leds off */
 307         lp55xx_write(chip, LP5562_REG_R_PWM, 0);
 308         lp55xx_write(chip, LP5562_REG_G_PWM, 0);
 309         lp55xx_write(chip, LP5562_REG_B_PWM, 0);
 310         lp55xx_write(chip, LP5562_REG_W_PWM, 0);
 311
 312         /* Set LED map as register PWM by default */
 313         lp55xx_write(chip, LP5562_REG_ENG_SEL, LP5562_ENG_SEL_PWM);
 314
 315         return 0;
 316 }
 317
 318 static int lp5562_led_brightness(struct lp55xx_led *led)
 319 {
 320         struct lp55xx_chip *chip = led->chip;
 321         static const u8 addr[] = {
 322                 LP5562_REG_R_PWM,
 323                 LP5562_REG_G_PWM,
 324                 LP5562_REG_B_PWM,
 325                 LP5562_REG_W_PWM,
 326         };
 327         int ret;
 328
 329         mutex_lock(&chip->lock);
 330         ret = lp55xx_write(chip, addr[led->chan_nr], led->brightness);
 331         mutex_unlock(&chip->lock);
 332
 333         return ret;
 334 }
 335
 336 static void lp5562_write_program_memory(struct lp55xx_chip *chip,
 337                                         u8 base, const u8 *rgb, int size)
 338 {
 339         int i;
 340
 341         if (!rgb || size <= 0)
 342                 return;
 343
 344         for (i = 0; i < size; i++)
 345                 lp55xx_write(chip, base + i, *(rgb + i));
 346
 347         lp55xx_write(chip, base + i, 0);
 348         lp55xx_write(chip, base + i + 1, 0);
 349 }
 350
 351 /* check the size of program count */
 352 static inline bool _is_pc_overflow(struct lp55xx_predef_pattern *ptn)
 353 {
 354         return ptn->size_r >= LP5562_PROGRAM_LENGTH ||
 355                ptn->size_g >= LP5562_PROGRAM_LENGTH ||
 356                ptn->size_b >= LP5562_PROGRAM_LENGTH;
 357 }
 358
 359 static int lp5562_run_predef_led_pattern(struct lp55xx_chip *chip, int mode)
 360 {
 361         struct lp55xx_predef_pattern *ptn;
 362         int i;
 363
 364         if (mode == LP5562_PATTERN_OFF) {
 365                 lp5562_run_engine(chip, false);
 366                 return 0;
 367         }
 368
 369         ptn = chip->pdata->patterns + (mode - 1);
 370         if (!ptn || _is_pc_overflow(ptn)) {
 371                 dev_err(&chip->cl->dev, "invalid pattern data\n");
 372                 return -EINVAL;
 373         }
 374
 375         lp5562_stop_engine(chip);
 376
 377         /* Set LED map as RGB */
 378         lp55xx_write(chip, LP5562_REG_ENG_SEL, LP5562_ENG_SEL_RGB);
 379
 380         /* Load engines */
 381         for (i = LP55XX_ENGINE_1; i <= LP55XX_ENGINE_3; i++) {
 382                 chip->engine_idx = i;
 383                 lp5562_load_engine(chip);
 384         }
 385
 386         /* Clear program registers */
 387         lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG1, 0);
 388         lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG1 + 1, 0);
 389         lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG2, 0);
 390         lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG2 + 1, 0);
 391         lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG3, 0);
 392         lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG3 + 1, 0);
 393
 394         /* Program engines */
 395         lp5562_write_program_memory(chip, LP5562_REG_PROG_MEM_ENG1,
 396                                 ptn->r, ptn->size_r);
 397         lp5562_write_program_memory(chip, LP5562_REG_PROG_MEM_ENG2,
 398                                 ptn->g, ptn->size_g);
 399         lp5562_write_program_memory(chip, LP5562_REG_PROG_MEM_ENG3,
 400                                 ptn->b, ptn->size_b);
 401
 402         /* Run engines */
 403         lp5562_run_engine(chip, true);
 404
 405         return 0;
 406 }
 407
 408 static ssize_t lp5562_store_pattern(struct device *dev,
 409                                 struct device_attribute *attr,
 410                                 const char *buf, size_t len)
 411 {
 412         struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
 413         struct lp55xx_chip *chip = led->chip;
 414         struct lp55xx_predef_pattern *ptn = chip->pdata->patterns;
 415         int num_patterns = chip->pdata->num_patterns;
 416         unsigned long mode;
 417         int ret;
 418
 419         ret = kstrtoul(buf, 0, &mode);
 420         if (ret)
 421                 return ret;
 422
 423         if (mode > num_patterns || !ptn)
 424                 return -EINVAL;
 425
 426         mutex_lock(&chip->lock);
 427         ret = lp5562_run_predef_led_pattern(chip, mode);
 428         mutex_unlock(&chip->lock);
 429
 430         if (ret)
 431                 return ret;
 432
 433         return len;
 434 }
 435
 436 static ssize_t lp5562_store_engine_mux(struct device *dev,
 437                                      struct device_attribute *attr,
 438                                      const char *buf, size_t len)
 439 {
 440         struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
 441         struct lp55xx_chip *chip = led->chip;
 442         u8 mask;
 443         u8 val;
 444
 445         /* LED map
 446          * R ... Engine 1 (fixed)
 447          * G ... Engine 2 (fixed)
 448          * B ... Engine 3 (fixed)
 449          * W ... Engine 1 or 2 or 3
 450          */
 451
 452         if (sysfs_streq(buf, "RGB")) {
 453                 mask = LP5562_ENG_FOR_RGB_M;
 454                 val = LP5562_ENG_SEL_RGB;
 455         } else if (sysfs_streq(buf, "W")) {
 456                 enum lp55xx_engine_index idx = chip->engine_idx;
 457
 458                 mask = LP5562_ENG_FOR_W_M;
 459                 switch (idx) {
 460                 case LP55XX_ENGINE_1:
 461                         val = LP5562_ENG1_FOR_W;
 462                         break;
 463                 case LP55XX_ENGINE_2:
 464                         val = LP5562_ENG2_FOR_W;
 465                         break;
 466                 case LP55XX_ENGINE_3:
 467                         val = LP5562_ENG3_FOR_W;
 468                         break;
 469                 default:
 470                         return -EINVAL;
 471                 }
 472
 473         } else {
 474                 dev_err(dev, "choose RGB or W\n");
 475                 return -EINVAL;
 476         }
 477
 478         mutex_lock(&chip->lock);
 479         lp55xx_update_bits(chip, LP5562_REG_ENG_SEL, mask, val);
 480         mutex_unlock(&chip->lock);
 481
 482         return len;
 483 }
 484
 485 static LP55XX_DEV_ATTR_WO(led_pattern, lp5562_store_pattern);
 486 static LP55XX_DEV_ATTR_WO(engine_mux, lp5562_store_engine_mux);
 487
 488 static struct attribute *lp5562_attributes[] = {
 489         &dev_attr_led_pattern.attr,
 490         &dev_attr_engine_mux.attr,
 491         NULL,
 492 };
 493
 494 static const struct attribute_group lp5562_group = {
 495         .attrs = lp5562_attributes,
 496 };
 497
 498 /* Chip specific configurations */
 499 static struct lp55xx_device_config lp5562_cfg = {
 500         .max_channel  = LP5562_MAX_LEDS,
 501         .reset = {
 502                 .addr = LP5562_REG_RESET,
 503                 .val  = LP5562_RESET,
 504         },
 505         .enable = {
 506                 .addr = LP5562_REG_ENABLE,
 507                 .val  = LP5562_ENABLE_DEFAULT,
 508         },
 509         .post_init_device   = lp5562_post_init_device,
 510         .set_led_current    = lp5562_set_led_current,
 511         .brightness_fn      = lp5562_led_brightness,
 512         .run_engine         = lp5562_run_engine,
 513         .firmware_cb        = lp5562_firmware_loaded,
 514         .dev_attr_group     = &lp5562_group,
 515 };
 516
 517 static int lp5562_probe(struct i2c_client *client,
 518                         const struct i2c_device_id *id)
 519 {
 520         int ret;
 521         struct lp55xx_chip *chip;
 522         struct lp55xx_led *led;
 523         struct lp55xx_platform_data *pdata = dev_get_platdata(&client->dev);
 524         struct device_node *np = client->dev.of_node;
 525
 526         if (!pdata) {
 527                 if (np) {
 528                         pdata = lp55xx_of_populate_pdata(&client->dev, np);
 529                         if (IS_ERR(pdata))
 530                                 return PTR_ERR(pdata);
 531                 } else {
 532                         dev_err(&client->dev, "no platform data\n");
 533                         return -EINVAL;
 534                 }
 535         }
 536
 537         chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
 538         if (!chip)
 539                 return -ENOMEM;
 540
 541         led = devm_kcalloc(&client->dev,
 542                         pdata->num_channels, sizeof(*led), GFP_KERNEL);
 543         if (!led)
 544                 return -ENOMEM;
 545
 546         chip->cl = client;
 547         chip->pdata = pdata;
 548         chip->cfg = &lp5562_cfg;
 549
 550         mutex_init(&chip->lock);
 551
 552         i2c_set_clientdata(client, led);
 553
 554         ret = lp55xx_init_device(chip);
 555         if (ret)
 556                 goto err_init;
 557
 558         ret = lp55xx_register_leds(led, chip);
 559         if (ret)
 560                 goto err_register_leds;
 561
 562         ret = lp55xx_register_sysfs(chip);
 563         if (ret) {
 564                 dev_err(&client->dev, "registering sysfs failed\n");
 565                 goto err_register_sysfs;
 566         }
 567
 568         return 0;
 569
 570 err_register_sysfs:
 571         lp55xx_unregister_leds(led, chip);
 572 err_register_leds:
 573         lp55xx_deinit_device(chip);
 574 err_init:
 575         return ret;
 576 }
 577
 578 static int lp5562_remove(struct i2c_client *client)
 579 {
 580         struct lp55xx_led *led = i2c_get_clientdata(client);
 581         struct lp55xx_chip *chip = led->chip;
 582
 583         lp5562_stop_engine(chip);
 584
 585         lp55xx_unregister_sysfs(chip);
 586         lp55xx_unregister_leds(led, chip);
 587         lp55xx_deinit_device(chip);
 588
 589         return 0;
 590 }
 591
 592 static const struct i2c_device_id lp5562_id[] = {
 593         { "lp5562", 0 },
 594         { }
 595 };
 596 MODULE_DEVICE_TABLE(i2c, lp5562_id);
 597
 598 #ifdef CONFIG_OF
 599 static const struct of_device_id of_lp5562_leds_match[] = {
 600         { .compatible = "ti,lp5562", },
 601         {},
 602 };
 603
 604 MODULE_DEVICE_TABLE(of, of_lp5562_leds_match);
 605 #endif
 606
 607 static struct i2c_driver lp5562_driver = {
 608         .driver = {
 609                 .name   = "lp5562",
 610                 .of_match_table = of_match_ptr(of_lp5562_leds_match),
 611         },
 612         .probe          = lp5562_probe,
 613         .remove         = lp5562_remove,
 614         .id_table       = lp5562_id,
 615 };
 616
 617 module_i2c_driver(lp5562_driver);
 618
 619 MODULE_DESCRIPTION("Texas Instruments LP5562 LED Driver");
 620 MODULE_AUTHOR("Milo Kim");
 621 MODULE_LICENSE("GPL");