drivers/video/backlight/lm3630a_bl.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3 * Simple driver for Texas Instruments LM3630A Backlight driver chip
   4 * Copyright (C) 2012 Texas Instruments
   5 */
   6 #include <linux/module.h>
   7 #include <linux/slab.h>
   8 #include <linux/i2c.h>
   9 #include <linux/backlight.h>
  10 #include <linux/err.h>
  11 #include <linux/delay.h>
  12 #include <linux/uaccess.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/regmap.h>
  15 #include <linux/gpio/consumer.h>
  16 #include <linux/pwm.h>
  17 #include <linux/platform_data/lm3630a_bl.h>
  18
  19 #define REG_CTRL        0x00
  20 #define REG_BOOST       0x02
  21 #define REG_CONFIG      0x01
  22 #define REG_BRT_A       0x03
  23 #define REG_BRT_B       0x04
  24 #define REG_I_A         0x05
  25 #define REG_I_B         0x06
  26 #define REG_INT_STATUS  0x09
  27 #define REG_INT_EN      0x0A
  28 #define REG_FAULT       0x0B
  29 #define REG_PWM_OUTLOW  0x12
  30 #define REG_PWM_OUTHIGH 0x13
  31 #define REG_FILTER_STRENGTH     0x50
  32 #define REG_MAX         0x50
  33
  34 #define INT_DEBOUNCE_MSEC       10
  35
  36 #define LM3630A_BANK_0          0
  37 #define LM3630A_BANK_1          1
  38
  39 #define LM3630A_NUM_SINKS       2
  40 #define LM3630A_SINK_0          0
  41 #define LM3630A_SINK_1          1
  42
  43 struct lm3630a_chip {
  44         struct device *dev;
  45         struct delayed_work work;
  46
  47         int irq;
  48         struct workqueue_struct *irqthread;
  49         struct lm3630a_platform_data *pdata;
  50         struct backlight_device *bleda;
  51         struct backlight_device *bledb;
  52         struct gpio_desc *enable_gpio;
  53         struct regmap *regmap;
  54         struct pwm_device *pwmd;
  55         struct pwm_state pwmd_state;
  56 };
  57
  58 /* i2c access */
  59 static int lm3630a_read(struct lm3630a_chip *pchip, unsigned int reg)
  60 {
  61         int rval;
  62         unsigned int reg_val;
  63
  64         rval = regmap_read(pchip->regmap, reg, &reg_val);
  65         if (rval < 0)
  66                 return rval;
  67         return reg_val & 0xFF;
  68 }
  69
  70 static int lm3630a_write(struct lm3630a_chip *pchip,
  71                          unsigned int reg, unsigned int data)
  72 {
  73         return regmap_write(pchip->regmap, reg, data);
  74 }
  75
  76 static int lm3630a_update(struct lm3630a_chip *pchip,
  77                           unsigned int reg, unsigned int mask,
  78                           unsigned int data)
  79 {
  80         return regmap_update_bits(pchip->regmap, reg, mask, data);
  81 }
  82
  83 /* initialize chip */
  84 static int lm3630a_chip_init(struct lm3630a_chip *pchip)
  85 {
  86         int rval;
  87         struct lm3630a_platform_data *pdata = pchip->pdata;
  88
  89         usleep_range(1000, 2000);
  90         /* set Filter Strength Register */
  91         rval = lm3630a_write(pchip, REG_FILTER_STRENGTH, 0x03);
  92         /* set Cofig. register */
  93         rval |= lm3630a_update(pchip, REG_CONFIG, 0x07, pdata->pwm_ctrl);
  94         /* set boost control */
  95         rval |= lm3630a_write(pchip, REG_BOOST, 0x38);
  96         /* set current A */
  97         rval |= lm3630a_update(pchip, REG_I_A, 0x1F, 0x1F);
  98         /* set current B */
  99         rval |= lm3630a_write(pchip, REG_I_B, 0x1F);
 100         /* set control */
 101         rval |= lm3630a_update(pchip, REG_CTRL, 0x14, pdata->leda_ctrl);
 102         rval |= lm3630a_update(pchip, REG_CTRL, 0x0B, pdata->ledb_ctrl);
 103         usleep_range(1000, 2000);
 104         /* set brightness A and B */
 105         rval |= lm3630a_write(pchip, REG_BRT_A, pdata->leda_init_brt);
 106         rval |= lm3630a_write(pchip, REG_BRT_B, pdata->ledb_init_brt);
 107
 108         if (rval < 0)
 109                 dev_err(pchip->dev, "i2c failed to access register\n");
 110         return rval;
 111 }
 112
 113 /* interrupt handling */
 114 static void lm3630a_delayed_func(struct work_struct *work)
 115 {
 116         int rval;
 117         struct lm3630a_chip *pchip;
 118
 119         pchip = container_of(work, struct lm3630a_chip, work.work);
 120
 121         rval = lm3630a_read(pchip, REG_INT_STATUS);
 122         if (rval < 0) {
 123                 dev_err(pchip->dev,
 124                         "i2c failed to access REG_INT_STATUS Register\n");
 125                 return;
 126         }
 127
 128         dev_info(pchip->dev, "REG_INT_STATUS Register is 0x%x\n", rval);
 129 }
 130
 131 static irqreturn_t lm3630a_isr_func(int irq, void *chip)
 132 {
 133         int rval;
 134         struct lm3630a_chip *pchip = chip;
 135         unsigned long delay = msecs_to_jiffies(INT_DEBOUNCE_MSEC);
 136
 137         queue_delayed_work(pchip->irqthread, &pchip->work, delay);
 138
 139         rval = lm3630a_update(pchip, REG_CTRL, 0x80, 0x00);
 140         if (rval < 0) {
 141                 dev_err(pchip->dev, "i2c failed to access register\n");
 142                 return IRQ_NONE;
 143         }
 144         return IRQ_HANDLED;
 145 }
 146
 147 static int lm3630a_intr_config(struct lm3630a_chip *pchip)
 148 {
 149         int rval;
 150
 151         rval = lm3630a_write(pchip, REG_INT_EN, 0x87);
 152         if (rval < 0)
 153                 return rval;
 154
 155         INIT_DELAYED_WORK(&pchip->work, lm3630a_delayed_func);
 156         pchip->irqthread = create_singlethread_workqueue("lm3630a-irqthd");
 157         if (!pchip->irqthread) {
 158                 dev_err(pchip->dev, "create irq thread fail\n");
 159                 return -ENOMEM;
 160         }
 161         if (request_threaded_irq
 162             (pchip->irq, NULL, lm3630a_isr_func,
 163              IRQF_TRIGGER_FALLING | IRQF_ONESHOT, "lm3630a_irq", pchip)) {
 164                 dev_err(pchip->dev, "request threaded irq fail\n");
 165                 destroy_workqueue(pchip->irqthread);
 166                 return -ENOMEM;
 167         }
 168         return rval;
 169 }
 170
 171 static int lm3630a_pwm_ctrl(struct lm3630a_chip *pchip, int br, int br_max)
 172 {
 173         int err;
 174
 175         pchip->pwmd_state.period = pchip->pdata->pwm_period;
 176
 177         err = pwm_set_relative_duty_cycle(&pchip->pwmd_state, br, br_max);
 178         if (err)
 179                 return err;
 180
 181         pchip->pwmd_state.enabled = pchip->pwmd_state.duty_cycle ? true : false;
 182
 183         return pwm_apply_state(pchip->pwmd, &pchip->pwmd_state);
 184 }
 185
 186 /* update and get brightness */
 187 static int lm3630a_bank_a_update_status(struct backlight_device *bl)
 188 {
 189         int ret;
 190         struct lm3630a_chip *pchip = bl_get_data(bl);
 191         enum lm3630a_pwm_ctrl pwm_ctrl = pchip->pdata->pwm_ctrl;
 192
 193         /* pwm control */
 194         if ((pwm_ctrl & LM3630A_PWM_BANK_A) != 0)
 195                 return lm3630a_pwm_ctrl(pchip, bl->props.brightness,
 196                                         bl->props.max_brightness);
 197
 198         /* disable sleep */
 199         ret = lm3630a_update(pchip, REG_CTRL, 0x80, 0x00);
 200         if (ret < 0)
 201                 goto out_i2c_err;
 202         usleep_range(1000, 2000);
 203         /* minimum brightness is 0x04 */
 204         ret = lm3630a_write(pchip, REG_BRT_A, bl->props.brightness);
 205
 206         if (backlight_is_blank(bl) || (backlight_get_brightness(bl) < 0x4))
 207                 /* turn the string off  */
 208                 ret |= lm3630a_update(pchip, REG_CTRL, LM3630A_LEDA_ENABLE, 0);
 209         else
 210                 ret |= lm3630a_update(pchip, REG_CTRL,
 211                                       LM3630A_LEDA_ENABLE, LM3630A_LEDA_ENABLE);
 212         if (ret < 0)
 213                 goto out_i2c_err;
 214         return 0;
 215
 216 out_i2c_err:
 217         dev_err(pchip->dev, "i2c failed to access (%pe)\n", ERR_PTR(ret));
 218         return ret;
 219 }
 220
 221 static int lm3630a_bank_a_get_brightness(struct backlight_device *bl)
 222 {
 223         int brightness, rval;
 224         struct lm3630a_chip *pchip = bl_get_data(bl);
 225         enum lm3630a_pwm_ctrl pwm_ctrl = pchip->pdata->pwm_ctrl;
 226
 227         if ((pwm_ctrl & LM3630A_PWM_BANK_A) != 0) {
 228                 rval = lm3630a_read(pchip, REG_PWM_OUTHIGH);
 229                 if (rval < 0)
 230                         goto out_i2c_err;
 231                 brightness = (rval & 0x01) << 8;
 232                 rval = lm3630a_read(pchip, REG_PWM_OUTLOW);
 233                 if (rval < 0)
 234                         goto out_i2c_err;
 235                 brightness |= rval;
 236                 goto out;
 237         }
 238
 239         /* disable sleep */
 240         rval = lm3630a_update(pchip, REG_CTRL, 0x80, 0x00);
 241         if (rval < 0)
 242                 goto out_i2c_err;
 243         usleep_range(1000, 2000);
 244         rval = lm3630a_read(pchip, REG_BRT_A);
 245         if (rval < 0)
 246                 goto out_i2c_err;
 247         brightness = rval;
 248
 249 out:
 250         bl->props.brightness = brightness;
 251         return bl->props.brightness;
 252 out_i2c_err:
 253         dev_err(pchip->dev, "i2c failed to access register\n");
 254         return 0;
 255 }
 256
 257 static const struct backlight_ops lm3630a_bank_a_ops = {
 258         .options = BL_CORE_SUSPENDRESUME,
 259         .update_status = lm3630a_bank_a_update_status,
 260         .get_brightness = lm3630a_bank_a_get_brightness,
 261 };
 262
 263 /* update and get brightness */
 264 static int lm3630a_bank_b_update_status(struct backlight_device *bl)
 265 {
 266         int ret;
 267         struct lm3630a_chip *pchip = bl_get_data(bl);
 268         enum lm3630a_pwm_ctrl pwm_ctrl = pchip->pdata->pwm_ctrl;
 269
 270         /* pwm control */
 271         if ((pwm_ctrl & LM3630A_PWM_BANK_B) != 0)
 272                 return lm3630a_pwm_ctrl(pchip, bl->props.brightness,
 273                                         bl->props.max_brightness);
 274
 275         /* disable sleep */
 276         ret = lm3630a_update(pchip, REG_CTRL, 0x80, 0x00);
 277         if (ret < 0)
 278                 goto out_i2c_err;
 279         usleep_range(1000, 2000);
 280         /* minimum brightness is 0x04 */
 281         ret = lm3630a_write(pchip, REG_BRT_B, bl->props.brightness);
 282
 283         if (backlight_is_blank(bl) || (backlight_get_brightness(bl) < 0x4))
 284                 /* turn the string off  */
 285                 ret |= lm3630a_update(pchip, REG_CTRL, LM3630A_LEDB_ENABLE, 0);
 286         else
 287                 ret |= lm3630a_update(pchip, REG_CTRL,
 288                                       LM3630A_LEDB_ENABLE, LM3630A_LEDB_ENABLE);
 289         if (ret < 0)
 290                 goto out_i2c_err;
 291         return 0;
 292
 293 out_i2c_err:
 294         dev_err(pchip->dev, "i2c failed to access (%pe)\n", ERR_PTR(ret));
 295         return ret;
 296 }
 297
 298 static int lm3630a_bank_b_get_brightness(struct backlight_device *bl)
 299 {
 300         int brightness, rval;
 301         struct lm3630a_chip *pchip = bl_get_data(bl);
 302         enum lm3630a_pwm_ctrl pwm_ctrl = pchip->pdata->pwm_ctrl;
 303
 304         if ((pwm_ctrl & LM3630A_PWM_BANK_B) != 0) {
 305                 rval = lm3630a_read(pchip, REG_PWM_OUTHIGH);
 306                 if (rval < 0)
 307                         goto out_i2c_err;
 308                 brightness = (rval & 0x01) << 8;
 309                 rval = lm3630a_read(pchip, REG_PWM_OUTLOW);
 310                 if (rval < 0)
 311                         goto out_i2c_err;
 312                 brightness |= rval;
 313                 goto out;
 314         }
 315
 316         /* disable sleep */
 317         rval = lm3630a_update(pchip, REG_CTRL, 0x80, 0x00);
 318         if (rval < 0)
 319                 goto out_i2c_err;
 320         usleep_range(1000, 2000);
 321         rval = lm3630a_read(pchip, REG_BRT_B);
 322         if (rval < 0)
 323                 goto out_i2c_err;
 324         brightness = rval;
 325
 326 out:
 327         bl->props.brightness = brightness;
 328         return bl->props.brightness;
 329 out_i2c_err:
 330         dev_err(pchip->dev, "i2c failed to access register\n");
 331         return 0;
 332 }
 333
 334 static const struct backlight_ops lm3630a_bank_b_ops = {
 335         .options = BL_CORE_SUSPENDRESUME,
 336         .update_status = lm3630a_bank_b_update_status,
 337         .get_brightness = lm3630a_bank_b_get_brightness,
 338 };
 339
 340 static int lm3630a_backlight_register(struct lm3630a_chip *pchip)
 341 {
 342         struct lm3630a_platform_data *pdata = pchip->pdata;
 343         struct backlight_properties props;
 344         const char *label;
 345
 346         props.type = BACKLIGHT_RAW;
 347         if (pdata->leda_ctrl != LM3630A_LEDA_DISABLE) {
 348                 props.brightness = pdata->leda_init_brt;
 349                 props.max_brightness = pdata->leda_max_brt;
 350                 label = pdata->leda_label ? pdata->leda_label : "lm3630a_leda";
 351                 pchip->bleda =
 352                     devm_backlight_device_register(pchip->dev, label,
 353                                                    pchip->dev, pchip,
 354                                                    &lm3630a_bank_a_ops, &props);
 355                 if (IS_ERR(pchip->bleda))
 356                         return PTR_ERR(pchip->bleda);
 357         }
 358
 359         if ((pdata->ledb_ctrl != LM3630A_LEDB_DISABLE) &&
 360             (pdata->ledb_ctrl != LM3630A_LEDB_ON_A)) {
 361                 props.brightness = pdata->ledb_init_brt;
 362                 props.max_brightness = pdata->ledb_max_brt;
 363                 label = pdata->ledb_label ? pdata->ledb_label : "lm3630a_ledb";
 364                 pchip->bledb =
 365                     devm_backlight_device_register(pchip->dev, label,
 366                                                    pchip->dev, pchip,
 367                                                    &lm3630a_bank_b_ops, &props);
 368                 if (IS_ERR(pchip->bledb))
 369                         return PTR_ERR(pchip->bledb);
 370         }
 371         return 0;
 372 }
 373
 374 static const struct regmap_config lm3630a_regmap = {
 375         .reg_bits = 8,
 376         .val_bits = 8,
 377         .max_register = REG_MAX,
 378 };
 379
 380 static int lm3630a_parse_led_sources(struct fwnode_handle *node,
 381                                      int default_led_sources)
 382 {
 383         u32 sources[LM3630A_NUM_SINKS];
 384         int ret, num_sources, i;
 385
 386         num_sources = fwnode_property_count_u32(node, "led-sources");
 387         if (num_sources < 0)
 388                 return default_led_sources;
 389         else if (num_sources > ARRAY_SIZE(sources))
 390                 return -EINVAL;
 391
 392         ret = fwnode_property_read_u32_array(node, "led-sources", sources,
 393                                              num_sources);
 394         if (ret)
 395                 return ret;
 396
 397         for (i = 0; i < num_sources; i++) {
 398                 if (sources[i] != LM3630A_SINK_0 && sources[i] != LM3630A_SINK_1)
 399                         return -EINVAL;
 400
 401                 ret |= BIT(sources[i]);
 402         }
 403
 404         return ret;
 405 }
 406
 407 static int lm3630a_parse_bank(struct lm3630a_platform_data *pdata,
 408                               struct fwnode_handle *node, int *seen_led_sources)
 409 {
 410         int led_sources, ret;
 411         const char *label;
 412         u32 bank, val;
 413         bool linear;
 414
 415         ret = fwnode_property_read_u32(node, "reg", &bank);
 416         if (ret)
 417                 return ret;
 418
 419         if (bank != LM3630A_BANK_0 && bank != LM3630A_BANK_1)
 420                 return -EINVAL;
 421
 422         led_sources = lm3630a_parse_led_sources(node, BIT(bank));
 423         if (led_sources < 0)
 424                 return led_sources;
 425
 426         if (*seen_led_sources & led_sources)
 427                 return -EINVAL;
 428
 429         *seen_led_sources |= led_sources;
 430
 431         linear = fwnode_property_read_bool(node,
 432                                            "ti,linear-mapping-mode");
 433         if (bank) {
 434                 if (led_sources & BIT(LM3630A_SINK_0) ||
 435                     !(led_sources & BIT(LM3630A_SINK_1)))
 436                         return -EINVAL;
 437
 438                 pdata->ledb_ctrl = linear ?
 439                         LM3630A_LEDB_ENABLE_LINEAR :
 440                         LM3630A_LEDB_ENABLE;
 441         } else {
 442                 if (!(led_sources & BIT(LM3630A_SINK_0)))
 443                         return -EINVAL;
 444
 445                 pdata->leda_ctrl = linear ?
 446                         LM3630A_LEDA_ENABLE_LINEAR :
 447                         LM3630A_LEDA_ENABLE;
 448
 449                 if (led_sources & BIT(LM3630A_SINK_1))
 450                         pdata->ledb_ctrl = LM3630A_LEDB_ON_A;
 451         }
 452
 453         ret = fwnode_property_read_string(node, "label", &label);
 454         if (!ret) {
 455                 if (bank)
 456                         pdata->ledb_label = label;
 457                 else
 458                         pdata->leda_label = label;
 459         }
 460
 461         ret = fwnode_property_read_u32(node, "default-brightness",
 462                                        &val);
 463         if (!ret) {
 464                 if (bank)
 465                         pdata->ledb_init_brt = val;
 466                 else
 467                         pdata->leda_init_brt = val;
 468         }
 469
 470         ret = fwnode_property_read_u32(node, "max-brightness", &val);
 471         if (!ret) {
 472                 if (bank)
 473                         pdata->ledb_max_brt = val;
 474                 else
 475                         pdata->leda_max_brt = val;
 476         }
 477
 478         return 0;
 479 }
 480
 481 static int lm3630a_parse_node(struct lm3630a_chip *pchip,
 482                               struct lm3630a_platform_data *pdata)
 483 {
 484         int ret = -ENODEV, seen_led_sources = 0;
 485         struct fwnode_handle *node;
 486
 487         device_for_each_child_node(pchip->dev, node) {
 488                 ret = lm3630a_parse_bank(pdata, node, &seen_led_sources);
 489                 if (ret) {
 490                         fwnode_handle_put(node);
 491                         return ret;
 492                 }
 493         }
 494
 495         return ret;
 496 }
 497
 498 static int lm3630a_probe(struct i2c_client *client)
 499 {
 500         struct lm3630a_platform_data *pdata = dev_get_platdata(&client->dev);
 501         struct lm3630a_chip *pchip;
 502         int rval;
 503
 504         if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 505                 dev_err(&client->dev, "fail : i2c functionality check\n");
 506                 return -EOPNOTSUPP;
 507         }
 508
 509         pchip = devm_kzalloc(&client->dev, sizeof(struct lm3630a_chip),
 510                              GFP_KERNEL);
 511         if (!pchip)
 512                 return -ENOMEM;
 513         pchip->dev = &client->dev;
 514
 515         pchip->regmap = devm_regmap_init_i2c(client, &lm3630a_regmap);
 516         if (IS_ERR(pchip->regmap)) {
 517                 rval = PTR_ERR(pchip->regmap);
 518                 dev_err(&client->dev, "fail : allocate reg. map: %d\n", rval);
 519                 return rval;
 520         }
 521
 522         i2c_set_clientdata(client, pchip);
 523         if (pdata == NULL) {
 524                 pdata = devm_kzalloc(pchip->dev,
 525                                      sizeof(struct lm3630a_platform_data),
 526                                      GFP_KERNEL);
 527                 if (pdata == NULL)
 528                         return -ENOMEM;
 529
 530                 /* default values */
 531                 pdata->leda_max_brt = LM3630A_MAX_BRIGHTNESS;
 532                 pdata->ledb_max_brt = LM3630A_MAX_BRIGHTNESS;
 533                 pdata->leda_init_brt = LM3630A_MAX_BRIGHTNESS;
 534                 pdata->ledb_init_brt = LM3630A_MAX_BRIGHTNESS;
 535
 536                 rval = lm3630a_parse_node(pchip, pdata);
 537                 if (rval) {
 538                         dev_err(&client->dev, "fail : parse node\n");
 539                         return rval;
 540                 }
 541         }
 542         pchip->pdata = pdata;
 543
 544         pchip->enable_gpio = devm_gpiod_get_optional(&client->dev, "enable",
 545                                                 GPIOD_OUT_HIGH);
 546         if (IS_ERR(pchip->enable_gpio)) {
 547                 rval = PTR_ERR(pchip->enable_gpio);
 548                 return rval;
 549         }
 550
 551         /* chip initialize */
 552         rval = lm3630a_chip_init(pchip);
 553         if (rval < 0) {
 554                 dev_err(&client->dev, "fail : init chip\n");
 555                 return rval;
 556         }
 557         /* backlight register */
 558         rval = lm3630a_backlight_register(pchip);
 559         if (rval < 0) {
 560                 dev_err(&client->dev, "fail : backlight register.\n");
 561                 return rval;
 562         }
 563         /* pwm */
 564         if (pdata->pwm_ctrl != LM3630A_PWM_DISABLE) {
 565                 pchip->pwmd = devm_pwm_get(pchip->dev, "lm3630a-pwm");
 566                 if (IS_ERR(pchip->pwmd)) {
 567                         dev_err(&client->dev, "fail : get pwm device\n");
 568                         return PTR_ERR(pchip->pwmd);
 569                 }
 570
 571                 pwm_init_state(pchip->pwmd, &pchip->pwmd_state);
 572         }
 573
 574         /* interrupt enable  : irq 0 is not allowed */
 575         pchip->irq = client->irq;
 576         if (pchip->irq) {
 577                 rval = lm3630a_intr_config(pchip);
 578                 if (rval < 0)
 579                         return rval;
 580         }
 581         dev_info(&client->dev, "LM3630A backlight register OK.\n");
 582         return 0;
 583 }
 584
 585 static void lm3630a_remove(struct i2c_client *client)
 586 {
 587         int rval;
 588         struct lm3630a_chip *pchip = i2c_get_clientdata(client);
 589
 590         rval = lm3630a_write(pchip, REG_BRT_A, 0);
 591         if (rval < 0)
 592                 dev_err(pchip->dev, "i2c failed to access register\n");
 593
 594         rval = lm3630a_write(pchip, REG_BRT_B, 0);
 595         if (rval < 0)
 596                 dev_err(pchip->dev, "i2c failed to access register\n");
 597
 598         if (pchip->irq) {
 599                 free_irq(pchip->irq, pchip);
 600                 destroy_workqueue(pchip->irqthread);
 601         }
 602 }
 603
 604 static const struct i2c_device_id lm3630a_id[] = {
 605         {LM3630A_NAME, 0},
 606         {}
 607 };
 608
 609 MODULE_DEVICE_TABLE(i2c, lm3630a_id);
 610
 611 static const struct of_device_id lm3630a_match_table[] = {
 612         { .compatible = "ti,lm3630a", },
 613         { },
 614 };
 615
 616 MODULE_DEVICE_TABLE(of, lm3630a_match_table);
 617
 618 static struct i2c_driver lm3630a_i2c_driver = {
 619         .driver = {
 620                    .name = LM3630A_NAME,
 621                    .of_match_table = lm3630a_match_table,
 622                    },
 623         .probe = lm3630a_probe,
 624         .remove = lm3630a_remove,
 625         .id_table = lm3630a_id,
 626 };
 627
 628 module_i2c_driver(lm3630a_i2c_driver);
 629
 630 MODULE_DESCRIPTION("Texas Instruments Backlight driver for LM3630A");
 631 MODULE_AUTHOR("Daniel Jeong <[email protected]>");
 632 MODULE_AUTHOR("LDD MLP <[email protected]>");
 633 MODULE_LICENSE("GPL v2");