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         if (bl->props.brightness < 0x4)
 206                 ret |= lm3630a_update(pchip, REG_CTRL, LM3630A_LEDA_ENABLE, 0);
 207         else
 208                 ret |= lm3630a_update(pchip, REG_CTRL,
 209                                       LM3630A_LEDA_ENABLE, LM3630A_LEDA_ENABLE);
 210         if (ret < 0)
 211                 goto out_i2c_err;
 212         return 0;
 213
 214 out_i2c_err:
 215         dev_err(pchip->dev, "i2c failed to access (%pe)\n", ERR_PTR(ret));
 216         return ret;
 217 }
 218
 219 static int lm3630a_bank_a_get_brightness(struct backlight_device *bl)
 220 {
 221         int brightness, rval;
 222         struct lm3630a_chip *pchip = bl_get_data(bl);
 223         enum lm3630a_pwm_ctrl pwm_ctrl = pchip->pdata->pwm_ctrl;
 224
 225         if ((pwm_ctrl & LM3630A_PWM_BANK_A) != 0) {
 226                 rval = lm3630a_read(pchip, REG_PWM_OUTHIGH);
 227                 if (rval < 0)
 228                         goto out_i2c_err;
 229                 brightness = (rval & 0x01) << 8;
 230                 rval = lm3630a_read(pchip, REG_PWM_OUTLOW);
 231                 if (rval < 0)
 232                         goto out_i2c_err;
 233                 brightness |= rval;
 234                 goto out;
 235         }
 236
 237         /* disable sleep */
 238         rval = lm3630a_update(pchip, REG_CTRL, 0x80, 0x00);
 239         if (rval < 0)
 240                 goto out_i2c_err;
 241         usleep_range(1000, 2000);
 242         rval = lm3630a_read(pchip, REG_BRT_A);
 243         if (rval < 0)
 244                 goto out_i2c_err;
 245         brightness = rval;
 246
 247 out:
 248         bl->props.brightness = brightness;
 249         return bl->props.brightness;
 250 out_i2c_err:
 251         dev_err(pchip->dev, "i2c failed to access register\n");
 252         return 0;
 253 }
 254
 255 static const struct backlight_ops lm3630a_bank_a_ops = {
 256         .options = BL_CORE_SUSPENDRESUME,
 257         .update_status = lm3630a_bank_a_update_status,
 258         .get_brightness = lm3630a_bank_a_get_brightness,
 259 };
 260
 261 /* update and get brightness */
 262 static int lm3630a_bank_b_update_status(struct backlight_device *bl)
 263 {
 264         int ret;
 265         struct lm3630a_chip *pchip = bl_get_data(bl);
 266         enum lm3630a_pwm_ctrl pwm_ctrl = pchip->pdata->pwm_ctrl;
 267
 268         /* pwm control */
 269         if ((pwm_ctrl & LM3630A_PWM_BANK_B) != 0)
 270                 return lm3630a_pwm_ctrl(pchip, bl->props.brightness,
 271                                         bl->props.max_brightness);
 272
 273         /* disable sleep */
 274         ret = lm3630a_update(pchip, REG_CTRL, 0x80, 0x00);
 275         if (ret < 0)
 276                 goto out_i2c_err;
 277         usleep_range(1000, 2000);
 278         /* minimum brightness is 0x04 */
 279         ret = lm3630a_write(pchip, REG_BRT_B, bl->props.brightness);
 280         if (bl->props.brightness < 0x4)
 281                 ret |= lm3630a_update(pchip, REG_CTRL, LM3630A_LEDB_ENABLE, 0);
 282         else
 283                 ret |= lm3630a_update(pchip, REG_CTRL,
 284                                       LM3630A_LEDB_ENABLE, LM3630A_LEDB_ENABLE);
 285         if (ret < 0)
 286                 goto out_i2c_err;
 287         return 0;
 288
 289 out_i2c_err:
 290         dev_err(pchip->dev, "i2c failed to access (%pe)\n", ERR_PTR(ret));
 291         return ret;
 292 }
 293
 294 static int lm3630a_bank_b_get_brightness(struct backlight_device *bl)
 295 {
 296         int brightness, rval;
 297         struct lm3630a_chip *pchip = bl_get_data(bl);
 298         enum lm3630a_pwm_ctrl pwm_ctrl = pchip->pdata->pwm_ctrl;
 299
 300         if ((pwm_ctrl & LM3630A_PWM_BANK_B) != 0) {
 301                 rval = lm3630a_read(pchip, REG_PWM_OUTHIGH);
 302                 if (rval < 0)
 303                         goto out_i2c_err;
 304                 brightness = (rval & 0x01) << 8;
 305                 rval = lm3630a_read(pchip, REG_PWM_OUTLOW);
 306                 if (rval < 0)
 307                         goto out_i2c_err;
 308                 brightness |= rval;
 309                 goto out;
 310         }
 311
 312         /* disable sleep */
 313         rval = lm3630a_update(pchip, REG_CTRL, 0x80, 0x00);
 314         if (rval < 0)
 315                 goto out_i2c_err;
 316         usleep_range(1000, 2000);
 317         rval = lm3630a_read(pchip, REG_BRT_B);
 318         if (rval < 0)
 319                 goto out_i2c_err;
 320         brightness = rval;
 321
 322 out:
 323         bl->props.brightness = brightness;
 324         return bl->props.brightness;
 325 out_i2c_err:
 326         dev_err(pchip->dev, "i2c failed to access register\n");
 327         return 0;
 328 }
 329
 330 static const struct backlight_ops lm3630a_bank_b_ops = {
 331         .options = BL_CORE_SUSPENDRESUME,
 332         .update_status = lm3630a_bank_b_update_status,
 333         .get_brightness = lm3630a_bank_b_get_brightness,
 334 };
 335
 336 static int lm3630a_backlight_register(struct lm3630a_chip *pchip)
 337 {
 338         struct lm3630a_platform_data *pdata = pchip->pdata;
 339         struct backlight_properties props;
 340         const char *label;
 341
 342         props.type = BACKLIGHT_RAW;
 343         if (pdata->leda_ctrl != LM3630A_LEDA_DISABLE) {
 344                 props.brightness = pdata->leda_init_brt;
 345                 props.max_brightness = pdata->leda_max_brt;
 346                 label = pdata->leda_label ? pdata->leda_label : "lm3630a_leda";
 347                 pchip->bleda =
 348                     devm_backlight_device_register(pchip->dev, label,
 349                                                    pchip->dev, pchip,
 350                                                    &lm3630a_bank_a_ops, &props);
 351                 if (IS_ERR(pchip->bleda))
 352                         return PTR_ERR(pchip->bleda);
 353         }
 354
 355         if ((pdata->ledb_ctrl != LM3630A_LEDB_DISABLE) &&
 356             (pdata->ledb_ctrl != LM3630A_LEDB_ON_A)) {
 357                 props.brightness = pdata->ledb_init_brt;
 358                 props.max_brightness = pdata->ledb_max_brt;
 359                 label = pdata->ledb_label ? pdata->ledb_label : "lm3630a_ledb";
 360                 pchip->bledb =
 361                     devm_backlight_device_register(pchip->dev, label,
 362                                                    pchip->dev, pchip,
 363                                                    &lm3630a_bank_b_ops, &props);
 364                 if (IS_ERR(pchip->bledb))
 365                         return PTR_ERR(pchip->bledb);
 366         }
 367         return 0;
 368 }
 369
 370 static const struct regmap_config lm3630a_regmap = {
 371         .reg_bits = 8,
 372         .val_bits = 8,
 373         .max_register = REG_MAX,
 374 };
 375
 376 static int lm3630a_parse_led_sources(struct fwnode_handle *node,
 377                                      int default_led_sources)
 378 {
 379         u32 sources[LM3630A_NUM_SINKS];
 380         int ret, num_sources, i;
 381
 382         num_sources = fwnode_property_count_u32(node, "led-sources");
 383         if (num_sources < 0)
 384                 return default_led_sources;
 385         else if (num_sources > ARRAY_SIZE(sources))
 386                 return -EINVAL;
 387
 388         ret = fwnode_property_read_u32_array(node, "led-sources", sources,
 389                                              num_sources);
 390         if (ret)
 391                 return ret;
 392
 393         for (i = 0; i < num_sources; i++) {
 394                 if (sources[i] != LM3630A_SINK_0 && sources[i] != LM3630A_SINK_1)
 395                         return -EINVAL;
 396
 397                 ret |= BIT(sources[i]);
 398         }
 399
 400         return ret;
 401 }
 402
 403 static int lm3630a_parse_bank(struct lm3630a_platform_data *pdata,
 404                               struct fwnode_handle *node, int *seen_led_sources)
 405 {
 406         int led_sources, ret;
 407         const char *label;
 408         u32 bank, val;
 409         bool linear;
 410
 411         ret = fwnode_property_read_u32(node, "reg", &bank);
 412         if (ret)
 413                 return ret;
 414
 415         if (bank != LM3630A_BANK_0 && bank != LM3630A_BANK_1)
 416                 return -EINVAL;
 417
 418         led_sources = lm3630a_parse_led_sources(node, BIT(bank));
 419         if (led_sources < 0)
 420                 return led_sources;
 421
 422         if (*seen_led_sources & led_sources)
 423                 return -EINVAL;
 424
 425         *seen_led_sources |= led_sources;
 426
 427         linear = fwnode_property_read_bool(node,
 428                                            "ti,linear-mapping-mode");
 429         if (bank) {
 430                 if (led_sources & BIT(LM3630A_SINK_0) ||
 431                     !(led_sources & BIT(LM3630A_SINK_1)))
 432                         return -EINVAL;
 433
 434                 pdata->ledb_ctrl = linear ?
 435                         LM3630A_LEDB_ENABLE_LINEAR :
 436                         LM3630A_LEDB_ENABLE;
 437         } else {
 438                 if (!(led_sources & BIT(LM3630A_SINK_0)))
 439                         return -EINVAL;
 440
 441                 pdata->leda_ctrl = linear ?
 442                         LM3630A_LEDA_ENABLE_LINEAR :
 443                         LM3630A_LEDA_ENABLE;
 444
 445                 if (led_sources & BIT(LM3630A_SINK_1))
 446                         pdata->ledb_ctrl = LM3630A_LEDB_ON_A;
 447         }
 448
 449         ret = fwnode_property_read_string(node, "label", &label);
 450         if (!ret) {
 451                 if (bank)
 452                         pdata->ledb_label = label;
 453                 else
 454                         pdata->leda_label = label;
 455         }
 456
 457         ret = fwnode_property_read_u32(node, "default-brightness",
 458                                        &val);
 459         if (!ret) {
 460                 if (bank)
 461                         pdata->ledb_init_brt = val;
 462                 else
 463                         pdata->leda_init_brt = val;
 464         }
 465
 466         ret = fwnode_property_read_u32(node, "max-brightness", &val);
 467         if (!ret) {
 468                 if (bank)
 469                         pdata->ledb_max_brt = val;
 470                 else
 471                         pdata->leda_max_brt = val;
 472         }
 473
 474         return 0;
 475 }
 476
 477 static int lm3630a_parse_node(struct lm3630a_chip *pchip,
 478                               struct lm3630a_platform_data *pdata)
 479 {
 480         int ret = -ENODEV, seen_led_sources = 0;
 481         struct fwnode_handle *node;
 482
 483         device_for_each_child_node(pchip->dev, node) {
 484                 ret = lm3630a_parse_bank(pdata, node, &seen_led_sources);
 485                 if (ret) {
 486                         fwnode_handle_put(node);
 487                         return ret;
 488                 }
 489         }
 490
 491         return ret;
 492 }
 493
 494 static int lm3630a_probe(struct i2c_client *client,
 495                          const struct i2c_device_id *id)
 496 {
 497         struct lm3630a_platform_data *pdata = dev_get_platdata(&client->dev);
 498         struct lm3630a_chip *pchip;
 499         int rval;
 500
 501         if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 502                 dev_err(&client->dev, "fail : i2c functionality check\n");
 503                 return -EOPNOTSUPP;
 504         }
 505
 506         pchip = devm_kzalloc(&client->dev, sizeof(struct lm3630a_chip),
 507                              GFP_KERNEL);
 508         if (!pchip)
 509                 return -ENOMEM;
 510         pchip->dev = &client->dev;
 511
 512         pchip->regmap = devm_regmap_init_i2c(client, &lm3630a_regmap);
 513         if (IS_ERR(pchip->regmap)) {
 514                 rval = PTR_ERR(pchip->regmap);
 515                 dev_err(&client->dev, "fail : allocate reg. map: %d\n", rval);
 516                 return rval;
 517         }
 518
 519         i2c_set_clientdata(client, pchip);
 520         if (pdata == NULL) {
 521                 pdata = devm_kzalloc(pchip->dev,
 522                                      sizeof(struct lm3630a_platform_data),
 523                                      GFP_KERNEL);
 524                 if (pdata == NULL)
 525                         return -ENOMEM;
 526
 527                 /* default values */
 528                 pdata->leda_max_brt = LM3630A_MAX_BRIGHTNESS;
 529                 pdata->ledb_max_brt = LM3630A_MAX_BRIGHTNESS;
 530                 pdata->leda_init_brt = LM3630A_MAX_BRIGHTNESS;
 531                 pdata->ledb_init_brt = LM3630A_MAX_BRIGHTNESS;
 532
 533                 rval = lm3630a_parse_node(pchip, pdata);
 534                 if (rval) {
 535                         dev_err(&client->dev, "fail : parse node\n");
 536                         return rval;
 537                 }
 538         }
 539         pchip->pdata = pdata;
 540
 541         pchip->enable_gpio = devm_gpiod_get_optional(&client->dev, "enable",
 542                                                 GPIOD_OUT_HIGH);
 543         if (IS_ERR(pchip->enable_gpio)) {
 544                 rval = PTR_ERR(pchip->enable_gpio);
 545                 return rval;
 546         }
 547
 548         /* chip initialize */
 549         rval = lm3630a_chip_init(pchip);
 550         if (rval < 0) {
 551                 dev_err(&client->dev, "fail : init chip\n");
 552                 return rval;
 553         }
 554         /* backlight register */
 555         rval = lm3630a_backlight_register(pchip);
 556         if (rval < 0) {
 557                 dev_err(&client->dev, "fail : backlight register.\n");
 558                 return rval;
 559         }
 560         /* pwm */
 561         if (pdata->pwm_ctrl != LM3630A_PWM_DISABLE) {
 562                 pchip->pwmd = devm_pwm_get(pchip->dev, "lm3630a-pwm");
 563                 if (IS_ERR(pchip->pwmd)) {
 564                         dev_err(&client->dev, "fail : get pwm device\n");
 565                         return PTR_ERR(pchip->pwmd);
 566                 }
 567
 568                 pwm_init_state(pchip->pwmd, &pchip->pwmd_state);
 569         }
 570
 571         /* interrupt enable  : irq 0 is not allowed */
 572         pchip->irq = client->irq;
 573         if (pchip->irq) {
 574                 rval = lm3630a_intr_config(pchip);
 575                 if (rval < 0)
 576                         return rval;
 577         }
 578         dev_info(&client->dev, "LM3630A backlight register OK.\n");
 579         return 0;
 580 }
 581
 582 static int lm3630a_remove(struct i2c_client *client)
 583 {
 584         int rval;
 585         struct lm3630a_chip *pchip = i2c_get_clientdata(client);
 586
 587         rval = lm3630a_write(pchip, REG_BRT_A, 0);
 588         if (rval < 0)
 589                 dev_err(pchip->dev, "i2c failed to access register\n");
 590
 591         rval = lm3630a_write(pchip, REG_BRT_B, 0);
 592         if (rval < 0)
 593                 dev_err(pchip->dev, "i2c failed to access register\n");
 594
 595         if (pchip->irq) {
 596                 free_irq(pchip->irq, pchip);
 597                 flush_workqueue(pchip->irqthread);
 598                 destroy_workqueue(pchip->irqthread);
 599         }
 600         return 0;
 601 }
 602
 603 static const struct i2c_device_id lm3630a_id[] = {
 604         {LM3630A_NAME, 0},
 605         {}
 606 };
 607
 608 MODULE_DEVICE_TABLE(i2c, lm3630a_id);
 609
 610 static const struct of_device_id lm3630a_match_table[] = {
 611         { .compatible = "ti,lm3630a", },
 612         { },
 613 };
 614
 615 MODULE_DEVICE_TABLE(of, lm3630a_match_table);
 616
 617 static struct i2c_driver lm3630a_i2c_driver = {
 618         .driver = {
 619                    .name = LM3630A_NAME,
 620                    .of_match_table = lm3630a_match_table,
 621                    },
 622         .probe = lm3630a_probe,
 623         .remove = lm3630a_remove,
 624         .id_table = lm3630a_id,
 625 };
 626
 627 module_i2c_driver(lm3630a_i2c_driver);
 628
 629 MODULE_DESCRIPTION("Texas Instruments Backlight driver for LM3630A");
 630 MODULE_AUTHOR("Daniel Jeong <gshark.jeong@gmail.com>");
 631 MODULE_AUTHOR("LDD MLP <ldd-mlp@list.ti.com>");
 632 MODULE_LICENSE("GPL v2");