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/init.h>
  17 #include <linux/leds.h>
  18 #include <linux/module.h>
  19 #include <linux/mutex.h>
  20 #include <linux/of.h>
  21 #include <linux/platform_data/leds-lp55xx.h>
  22 #include <linux/slab.h>
  23
  24 #include "leds-lp55xx-common.h"
  25
  26 #define LP5562_PROGRAM_LENGTH           32
  27 #define LP5562_MAX_LEDS                 4
  28
  29 /* ENABLE Register 00h */
  30 #define LP5562_REG_ENABLE               0x00
  31 #define LP5562_EXEC_ENG1_M              0x30
  32 #define LP5562_EXEC_ENG2_M              0x0C
  33 #define LP5562_EXEC_ENG3_M              0x03
  34 #define LP5562_EXEC_M                   0x3F
  35 #define LP5562_MASTER_ENABLE            0x40    /* Chip master enable */
  36 #define LP5562_LOGARITHMIC_PWM          0x80    /* Logarithmic PWM adjustment */
  37 #define LP5562_EXEC_RUN                 0x2A
  38 #define LP5562_ENABLE_DEFAULT   \
  39         (LP5562_MASTER_ENABLE | LP5562_LOGARITHMIC_PWM)
  40 #define LP5562_ENABLE_RUN_PROGRAM       \
  41         (LP5562_ENABLE_DEFAULT | LP5562_EXEC_RUN)
  42
  43 /* OPMODE Register 01h */
  44 #define LP5562_REG_OP_MODE              0x01
  45 #define LP5562_MODE_ENG1_M              0x30
  46 #define LP5562_MODE_ENG2_M              0x0C
  47 #define LP5562_MODE_ENG3_M              0x03
  48 #define LP5562_LOAD_ENG1                0x10
  49 #define LP5562_LOAD_ENG2                0x04
  50 #define LP5562_LOAD_ENG3                0x01
  51 #define LP5562_RUN_ENG1                 0x20
  52 #define LP5562_RUN_ENG2                 0x08
  53 #define LP5562_RUN_ENG3                 0x02
  54 #define LP5562_ENG1_IS_LOADING(mode)    \
  55         ((mode & LP5562_MODE_ENG1_M) == LP5562_LOAD_ENG1)
  56 #define LP5562_ENG2_IS_LOADING(mode)    \
  57         ((mode & LP5562_MODE_ENG2_M) == LP5562_LOAD_ENG2)
  58 #define LP5562_ENG3_IS_LOADING(mode)    \
  59         ((mode & LP5562_MODE_ENG3_M) == LP5562_LOAD_ENG3)
  60
  61 /* BRIGHTNESS Registers */
  62 #define LP5562_REG_R_PWM                0x04
  63 #define LP5562_REG_G_PWM                0x03
  64 #define LP5562_REG_B_PWM                0x02
  65 #define LP5562_REG_W_PWM                0x0E
  66
  67 /* CURRENT Registers */
  68 #define LP5562_REG_R_CURRENT            0x07
  69 #define LP5562_REG_G_CURRENT            0x06
  70 #define LP5562_REG_B_CURRENT            0x05
  71 #define LP5562_REG_W_CURRENT            0x0F
  72
  73 /* CONFIG Register 08h */
  74 #define LP5562_REG_CONFIG               0x08
  75 #define LP5562_PWM_HF                   0x40
  76 #define LP5562_PWRSAVE_EN               0x20
  77 #define LP5562_CLK_INT                  0x01    /* Internal clock */
  78 #define LP5562_DEFAULT_CFG              (LP5562_PWM_HF | LP5562_PWRSAVE_EN)
  79
  80 /* RESET Register 0Dh */
  81 #define LP5562_REG_RESET                0x0D
  82 #define LP5562_RESET                    0xFF
  83
  84 /* PROGRAM ENGINE Registers */
  85 #define LP5562_REG_PROG_MEM_ENG1        0x10
  86 #define LP5562_REG_PROG_MEM_ENG2        0x30
  87 #define LP5562_REG_PROG_MEM_ENG3        0x50
  88
  89 /* LEDMAP Register 70h */
  90 #define LP5562_REG_ENG_SEL              0x70
  91 #define LP5562_ENG_SEL_PWM              0
  92 #define LP5562_ENG_FOR_RGB_M            0x3F
  93 #define LP5562_ENG_SEL_RGB              0x1B    /* R:ENG1, G:ENG2, B:ENG3 */
  94 #define LP5562_ENG_FOR_W_M              0xC0
  95 #define LP5562_ENG1_FOR_W               0x40    /* W:ENG1 */
  96 #define LP5562_ENG2_FOR_W               0x80    /* W:ENG2 */
  97 #define LP5562_ENG3_FOR_W               0xC0    /* W:ENG3 */
  98
  99 /* Program Commands */
 100 #define LP5562_CMD_DISABLE              0x00
 101 #define LP5562_CMD_LOAD                 0x15
 102 #define LP5562_CMD_RUN                  0x2A
 103 #define LP5562_CMD_DIRECT               0x3F
 104 #define LP5562_PATTERN_OFF              0
 105
 106 static inline void lp5562_wait_opmode_done(void)
 107 {
 108         /* operation mode change needs to be longer than 153 us */
 109         usleep_range(200, 300);
 110 }
 111
 112 static inline void lp5562_wait_enable_done(void)
 113 {
 114         /* it takes more 488 us to update ENABLE register */
 115         usleep_range(500, 600);
 116 }
 117
 118 static void lp5562_set_led_current(struct lp55xx_led *led, u8 led_current)
 119 {
 120         u8 addr[] = {
 121                 LP5562_REG_R_CURRENT,
 122                 LP5562_REG_G_CURRENT,
 123                 LP5562_REG_B_CURRENT,
 124                 LP5562_REG_W_CURRENT,
 125         };
 126
 127         led->led_current = led_current;
 128         lp55xx_write(led->chip, addr[led->chan_nr], led_current);
 129 }
 130
 131 static void lp5562_load_engine(struct lp55xx_chip *chip)
 132 {
 133         enum lp55xx_engine_index idx = chip->engine_idx;
 134         u8 mask[] = {
 135                 [LP55XX_ENGINE_1] = LP5562_MODE_ENG1_M,
 136                 [LP55XX_ENGINE_2] = LP5562_MODE_ENG2_M,
 137                 [LP55XX_ENGINE_3] = LP5562_MODE_ENG3_M,
 138         };
 139
 140         u8 val[] = {
 141                 [LP55XX_ENGINE_1] = LP5562_LOAD_ENG1,
 142                 [LP55XX_ENGINE_2] = LP5562_LOAD_ENG2,
 143                 [LP55XX_ENGINE_3] = LP5562_LOAD_ENG3,
 144         };
 145
 146         lp55xx_update_bits(chip, LP5562_REG_OP_MODE, mask[idx], val[idx]);
 147
 148         lp5562_wait_opmode_done();
 149 }
 150
 151 static void lp5562_stop_engine(struct lp55xx_chip *chip)
 152 {
 153         lp55xx_write(chip, LP5562_REG_OP_MODE, LP5562_CMD_DISABLE);
 154         lp5562_wait_opmode_done();
 155 }
 156
 157 static void lp5562_run_engine(struct lp55xx_chip *chip, bool start)
 158 {
 159         int ret;
 160         u8 mode;
 161         u8 exec;
 162
 163         /* stop engine */
 164         if (!start) {
 165                 lp55xx_write(chip, LP5562_REG_ENABLE, LP5562_ENABLE_DEFAULT);
 166                 lp5562_wait_enable_done();
 167                 lp5562_stop_engine(chip);
 168                 lp55xx_write(chip, LP5562_REG_ENG_SEL, LP5562_ENG_SEL_PWM);
 169                 lp55xx_write(chip, LP5562_REG_OP_MODE, LP5562_CMD_DIRECT);
 170                 lp5562_wait_opmode_done();
 171                 return;
 172         }
 173
 174         /*
 175          * To run the engine,
 176          * operation mode and enable register should updated at the same time
 177          */
 178
 179         ret = lp55xx_read(chip, LP5562_REG_OP_MODE, &mode);
 180         if (ret)
 181                 return;
 182
 183         ret = lp55xx_read(chip, LP5562_REG_ENABLE, &exec);
 184         if (ret)
 185                 return;
 186
 187         /* change operation mode to RUN only when each engine is loading */
 188         if (LP5562_ENG1_IS_LOADING(mode)) {
 189                 mode = (mode & ~LP5562_MODE_ENG1_M) | LP5562_RUN_ENG1;
 190                 exec = (exec & ~LP5562_EXEC_ENG1_M) | LP5562_RUN_ENG1;
 191         }
 192
 193         if (LP5562_ENG2_IS_LOADING(mode)) {
 194                 mode = (mode & ~LP5562_MODE_ENG2_M) | LP5562_RUN_ENG2;
 195                 exec = (exec & ~LP5562_EXEC_ENG2_M) | LP5562_RUN_ENG2;
 196         }
 197
 198         if (LP5562_ENG3_IS_LOADING(mode)) {
 199                 mode = (mode & ~LP5562_MODE_ENG3_M) | LP5562_RUN_ENG3;
 200                 exec = (exec & ~LP5562_EXEC_ENG3_M) | LP5562_RUN_ENG3;
 201         }
 202
 203         lp55xx_write(chip, LP5562_REG_OP_MODE, mode);
 204         lp5562_wait_opmode_done();
 205
 206         lp55xx_update_bits(chip, LP5562_REG_ENABLE, LP5562_EXEC_M, exec);
 207         lp5562_wait_enable_done();
 208 }
 209
 210 static int lp5562_update_firmware(struct lp55xx_chip *chip,
 211                                         const u8 *data, size_t size)
 212 {
 213         enum lp55xx_engine_index idx = chip->engine_idx;
 214         u8 pattern[LP5562_PROGRAM_LENGTH] = {0};
 215         u8 addr[] = {
 216                 [LP55XX_ENGINE_1] = LP5562_REG_PROG_MEM_ENG1,
 217                 [LP55XX_ENGINE_2] = LP5562_REG_PROG_MEM_ENG2,
 218                 [LP55XX_ENGINE_3] = LP5562_REG_PROG_MEM_ENG3,
 219         };
 220         unsigned cmd;
 221         char c[3];
 222         int program_size;
 223         int nrchars;
 224         int offset = 0;
 225         int ret;
 226         int i;
 227
 228         /* clear program memory before updating */
 229         for (i = 0; i < LP5562_PROGRAM_LENGTH; i++)
 230                 lp55xx_write(chip, addr[idx] + i, 0);
 231
 232         i = 0;
 233         while ((offset < size - 1) && (i < LP5562_PROGRAM_LENGTH)) {
 234                 /* separate sscanfs because length is working only for %s */
 235                 ret = sscanf(data + offset, "%2s%n ", c, &nrchars);
 236                 if (ret != 1)
 237                         goto err;
 238
 239                 ret = sscanf(c, "%2x", &cmd);
 240                 if (ret != 1)
 241                         goto err;
 242
 243                 pattern[i] = (u8)cmd;
 244                 offset += nrchars;
 245                 i++;
 246         }
 247
 248         /* Each instruction is 16bit long. Check that length is even */
 249         if (i % 2)
 250                 goto err;
 251
 252         program_size = i;
 253         for (i = 0; i < program_size; i++)
 254                 lp55xx_write(chip, addr[idx] + i, pattern[i]);
 255
 256         return 0;
 257
 258 err:
 259         dev_err(&chip->cl->dev, "wrong pattern format\n");
 260         return -EINVAL;
 261 }
 262
 263 static void lp5562_firmware_loaded(struct lp55xx_chip *chip)
 264 {
 265         const struct firmware *fw = chip->fw;
 266
 267         if (fw->size > LP5562_PROGRAM_LENGTH) {
 268                 dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n",
 269                         fw->size);
 270                 return;
 271         }
 272
 273         /*
 274          * Program momery sequence
 275          *  1) set engine mode to "LOAD"
 276          *  2) write firmware data into program memory
 277          */
 278
 279         lp5562_load_engine(chip);
 280         lp5562_update_firmware(chip, fw->data, fw->size);
 281 }
 282
 283 static int lp5562_post_init_device(struct lp55xx_chip *chip)
 284 {
 285         int ret;
 286         u8 cfg = LP5562_DEFAULT_CFG;
 287
 288         /* Set all PWMs to direct control mode */
 289         ret = lp55xx_write(chip, LP5562_REG_OP_MODE, LP5562_CMD_DIRECT);
 290         if (ret)
 291                 return ret;
 292
 293         lp5562_wait_opmode_done();
 294
 295         /* Update configuration for the clock setting */
 296         if (!lp55xx_is_extclk_used(chip))
 297                 cfg |= LP5562_CLK_INT;
 298
 299         ret = lp55xx_write(chip, LP5562_REG_CONFIG, cfg);
 300         if (ret)
 301                 return ret;
 302
 303         /* Initialize all channels PWM to zero -> leds off */
 304         lp55xx_write(chip, LP5562_REG_R_PWM, 0);
 305         lp55xx_write(chip, LP5562_REG_G_PWM, 0);
 306         lp55xx_write(chip, LP5562_REG_B_PWM, 0);
 307         lp55xx_write(chip, LP5562_REG_W_PWM, 0);
 308
 309         /* Set LED map as register PWM by default */
 310         lp55xx_write(chip, LP5562_REG_ENG_SEL, LP5562_ENG_SEL_PWM);
 311
 312         return 0;
 313 }
 314
 315 static void lp5562_led_brightness_work(struct work_struct *work)
 316 {
 317         struct lp55xx_led *led = container_of(work, struct lp55xx_led,
 318                                               brightness_work);
 319         struct lp55xx_chip *chip = led->chip;
 320         u8 addr[] = {
 321                 LP5562_REG_R_PWM,
 322                 LP5562_REG_G_PWM,
 323                 LP5562_REG_B_PWM,
 324                 LP5562_REG_W_PWM,
 325         };
 326
 327         mutex_lock(&chip->lock);
 328         lp55xx_write(chip, addr[led->chan_nr], led->brightness);
 329         mutex_unlock(&chip->lock);
 330 }
 331
 332 static void lp5562_write_program_memory(struct lp55xx_chip *chip,
 333                                         u8 base, const u8 *rgb, int size)
 334 {
 335         int i;
 336
 337         if (!rgb || size <= 0)
 338                 return;
 339
 340         for (i = 0; i < size; i++)
 341                 lp55xx_write(chip, base + i, *(rgb + i));
 342
 343         lp55xx_write(chip, base + i, 0);
 344         lp55xx_write(chip, base + i + 1, 0);
 345 }
 346
 347 /* check the size of program count */
 348 static inline bool _is_pc_overflow(struct lp55xx_predef_pattern *ptn)
 349 {
 350         return (ptn->size_r >= LP5562_PROGRAM_LENGTH ||
 351                 ptn->size_g >= LP5562_PROGRAM_LENGTH ||
 352                 ptn->size_b >= LP5562_PROGRAM_LENGTH);
 353 }
 354
 355 static int lp5562_run_predef_led_pattern(struct lp55xx_chip *chip, int mode)
 356 {
 357         struct lp55xx_predef_pattern *ptn;
 358         int i;
 359
 360         if (mode == LP5562_PATTERN_OFF) {
 361                 lp5562_run_engine(chip, false);
 362                 return 0;
 363         }
 364
 365         ptn = chip->pdata->patterns + (mode - 1);
 366         if (!ptn || _is_pc_overflow(ptn)) {
 367                 dev_err(&chip->cl->dev, "invalid pattern data\n");
 368                 return -EINVAL;
 369         }
 370
 371         lp5562_stop_engine(chip);
 372
 373         /* Set LED map as RGB */
 374         lp55xx_write(chip, LP5562_REG_ENG_SEL, LP5562_ENG_SEL_RGB);
 375
 376         /* Load engines */
 377         for (i = LP55XX_ENGINE_1; i <= LP55XX_ENGINE_3; i++) {
 378                 chip->engine_idx = i;
 379                 lp5562_load_engine(chip);
 380         }
 381
 382         /* Clear program registers */
 383         lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG1, 0);
 384         lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG1 + 1, 0);
 385         lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG2, 0);
 386         lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG2 + 1, 0);
 387         lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG3, 0);
 388         lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG3 + 1, 0);
 389
 390         /* Program engines */
 391         lp5562_write_program_memory(chip, LP5562_REG_PROG_MEM_ENG1,
 392                                 ptn->r, ptn->size_r);
 393         lp5562_write_program_memory(chip, LP5562_REG_PROG_MEM_ENG2,
 394                                 ptn->g, ptn->size_g);
 395         lp5562_write_program_memory(chip, LP5562_REG_PROG_MEM_ENG3,
 396                                 ptn->b, ptn->size_b);
 397
 398         /* Run engines */
 399         lp5562_run_engine(chip, true);
 400
 401         return 0;
 402 }
 403
 404 static ssize_t lp5562_store_pattern(struct device *dev,
 405                                 struct device_attribute *attr,
 406                                 const char *buf, size_t len)
 407 {
 408         struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
 409         struct lp55xx_chip *chip = led->chip;
 410         struct lp55xx_predef_pattern *ptn = chip->pdata->patterns;
 411         int num_patterns = chip->pdata->num_patterns;
 412         unsigned long mode;
 413         int ret;
 414
 415         ret = kstrtoul(buf, 0, &mode);
 416         if (ret)
 417                 return ret;
 418
 419         if (mode > num_patterns || !ptn)
 420                 return -EINVAL;
 421
 422         mutex_lock(&chip->lock);
 423         ret = lp5562_run_predef_led_pattern(chip, mode);
 424         mutex_unlock(&chip->lock);
 425
 426         if (ret)
 427                 return ret;
 428
 429         return len;
 430 }
 431
 432 static ssize_t lp5562_store_engine_mux(struct device *dev,
 433                                      struct device_attribute *attr,
 434                                      const char *buf, size_t len)
 435 {
 436         struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
 437         struct lp55xx_chip *chip = led->chip;
 438         u8 mask;
 439         u8 val;
 440
 441         /* LED map
 442          * R ... Engine 1 (fixed)
 443          * G ... Engine 2 (fixed)
 444          * B ... Engine 3 (fixed)
 445          * W ... Engine 1 or 2 or 3
 446          */
 447
 448         if (sysfs_streq(buf, "RGB")) {
 449                 mask = LP5562_ENG_FOR_RGB_M;
 450                 val = LP5562_ENG_SEL_RGB;
 451         } else if (sysfs_streq(buf, "W")) {
 452                 enum lp55xx_engine_index idx = chip->engine_idx;
 453
 454                 mask = LP5562_ENG_FOR_W_M;
 455                 switch (idx) {
 456                 case LP55XX_ENGINE_1:
 457                         val = LP5562_ENG1_FOR_W;
 458                         break;
 459                 case LP55XX_ENGINE_2:
 460                         val = LP5562_ENG2_FOR_W;
 461                         break;
 462                 case LP55XX_ENGINE_3:
 463                         val = LP5562_ENG3_FOR_W;
 464                         break;
 465                 default:
 466                         return -EINVAL;
 467                 }
 468
 469         } else {
 470                 dev_err(dev, "choose RGB or W\n");
 471                 return -EINVAL;
 472         }
 473
 474         mutex_lock(&chip->lock);
 475         lp55xx_update_bits(chip, LP5562_REG_ENG_SEL, mask, val);
 476         mutex_unlock(&chip->lock);
 477
 478         return len;
 479 }
 480
 481 static LP55XX_DEV_ATTR_WO(led_pattern, lp5562_store_pattern);
 482 static LP55XX_DEV_ATTR_WO(engine_mux, lp5562_store_engine_mux);
 483
 484 static struct attribute *lp5562_attributes[] = {
 485         &dev_attr_led_pattern.attr,
 486         &dev_attr_engine_mux.attr,
 487         NULL,
 488 };
 489
 490 static const struct attribute_group lp5562_group = {
 491         .attrs = lp5562_attributes,
 492 };
 493
 494 /* Chip specific configurations */
 495 static struct lp55xx_device_config lp5562_cfg = {
 496         .max_channel  = LP5562_MAX_LEDS,
 497         .reset = {
 498                 .addr = LP5562_REG_RESET,
 499                 .val  = LP5562_RESET,
 500         },
 501         .enable = {
 502                 .addr = LP5562_REG_ENABLE,
 503                 .val  = LP5562_ENABLE_DEFAULT,
 504         },
 505         .post_init_device   = lp5562_post_init_device,
 506         .set_led_current    = lp5562_set_led_current,
 507         .brightness_work_fn = lp5562_led_brightness_work,
 508         .run_engine         = lp5562_run_engine,
 509         .firmware_cb        = lp5562_firmware_loaded,
 510         .dev_attr_group     = &lp5562_group,
 511 };
 512
 513 static int lp5562_probe(struct i2c_client *client,
 514                         const struct i2c_device_id *id)
 515 {
 516         int ret;
 517         struct lp55xx_chip *chip;
 518         struct lp55xx_led *led;
 519         struct lp55xx_platform_data *pdata;
 520         struct device_node *np = client->dev.of_node;
 521
 522         if (!dev_get_platdata(&client->dev)) {
 523                 if (np) {
 524                         ret = lp55xx_of_populate_pdata(&client->dev, np);
 525                         if (ret < 0)
 526                                 return ret;
 527                 } else {
 528                         dev_err(&client->dev, "no platform data\n");
 529                         return -EINVAL;
 530                 }
 531         }
 532         pdata = dev_get_platdata(&client->dev);
 533
 534         chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
 535         if (!chip)
 536                 return -ENOMEM;
 537
 538         led = devm_kzalloc(&client->dev,
 539                         sizeof(*led) * pdata->num_channels, GFP_KERNEL);
 540         if (!led)
 541                 return -ENOMEM;
 542
 543         chip->cl = client;
 544         chip->pdata = pdata;
 545         chip->cfg = &lp5562_cfg;
 546
 547         mutex_init(&chip->lock);
 548
 549         i2c_set_clientdata(client, led);
 550
 551         ret = lp55xx_init_device(chip);
 552         if (ret)
 553                 goto err_init;
 554
 555         ret = lp55xx_register_leds(led, chip);
 556         if (ret)
 557                 goto err_register_leds;
 558
 559         ret = lp55xx_register_sysfs(chip);
 560         if (ret) {
 561                 dev_err(&client->dev, "registering sysfs failed\n");
 562                 goto err_register_sysfs;
 563         }
 564
 565         return 0;
 566
 567 err_register_sysfs:
 568         lp55xx_unregister_leds(led, chip);
 569 err_register_leds:
 570         lp55xx_deinit_device(chip);
 571 err_init:
 572         return ret;
 573 }
 574
 575 static int lp5562_remove(struct i2c_client *client)
 576 {
 577         struct lp55xx_led *led = i2c_get_clientdata(client);
 578         struct lp55xx_chip *chip = led->chip;
 579
 580         lp5562_stop_engine(chip);
 581
 582         lp55xx_unregister_sysfs(chip);
 583         lp55xx_unregister_leds(led, chip);
 584         lp55xx_deinit_device(chip);
 585
 586         return 0;
 587 }
 588
 589 static const struct i2c_device_id lp5562_id[] = {
 590         { "lp5562", 0 },
 591         { }
 592 };
 593 MODULE_DEVICE_TABLE(i2c, lp5562_id);
 594
 595 #ifdef CONFIG_OF
 596 static const struct of_device_id of_lp5562_leds_match[] = {
 597         { .compatible = "ti,lp5562", },
 598         {},
 599 };
 600
 601 MODULE_DEVICE_TABLE(of, of_lp5562_leds_match);
 602 #endif
 603
 604 static struct i2c_driver lp5562_driver = {
 605         .driver = {
 606                 .name   = "lp5562",
 607                 .of_match_table = of_match_ptr(of_lp5562_leds_match),
 608         },
 609         .probe          = lp5562_probe,
 610         .remove         = lp5562_remove,
 611         .id_table       = lp5562_id,
 612 };
 613
 614 module_i2c_driver(lp5562_driver);
 615
 616 MODULE_DESCRIPTION("Texas Instruments LP5562 LED Driver");
 617 MODULE_AUTHOR("Milo Kim");
 618 MODULE_LICENSE("GPL");