1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * VCNL4035 Ambient Light and Proximity Sensor - 7-bit I2C slave address 0x60 4 * 5 * Copyright (c) 2018, DENX Software Engineering GmbH 6 * Author: Parthiban Nallathambi <pn@denx.de> 7 * 8 * TODO: Proximity 9 */ 10 #include <linux/bitops.h> 11 #include <linux/i2c.h> 12 #include <linux/module.h> 13 #include <linux/pm_runtime.h> 14 #include <linux/regmap.h> 15 16 #include <linux/iio/buffer.h> 17 #include <linux/iio/events.h> 18 #include <linux/iio/iio.h> 19 #include <linux/iio/sysfs.h> 20 #include <linux/iio/trigger.h> 21 #include <linux/iio/trigger_consumer.h> 22 #include <linux/iio/triggered_buffer.h> 23 24 #define VCNL4035_DRV_NAME "vcnl4035" 25 #define VCNL4035_IRQ_NAME "vcnl4035_event" 26 #define VCNL4035_REGMAP_NAME "vcnl4035_regmap" 27 28 /* Device registers */ 29 #define VCNL4035_ALS_CONF 0x00 30 #define VCNL4035_ALS_THDH 0x01 31 #define VCNL4035_ALS_THDL 0x02 32 #define VCNL4035_ALS_DATA 0x0B 33 #define VCNL4035_WHITE_DATA 0x0C 34 #define VCNL4035_INT_FLAG 0x0D 35 #define VCNL4035_DEV_ID 0x0E 36 37 /* Register masks */ 38 #define VCNL4035_MODE_ALS_MASK BIT(0) 39 #define VCNL4035_MODE_ALS_WHITE_CHAN BIT(8) 40 #define VCNL4035_MODE_ALS_INT_MASK BIT(1) 41 #define VCNL4035_ALS_IT_MASK GENMASK(7, 5) 42 #define VCNL4035_ALS_PERS_MASK GENMASK(3, 2) 43 #define VCNL4035_INT_ALS_IF_H_MASK BIT(12) 44 #define VCNL4035_INT_ALS_IF_L_MASK BIT(13) 45 46 /* Default values */ 47 #define VCNL4035_MODE_ALS_ENABLE BIT(0) 48 #define VCNL4035_MODE_ALS_DISABLE 0x00 49 #define VCNL4035_MODE_ALS_INT_ENABLE BIT(1) 50 #define VCNL4035_MODE_ALS_INT_DISABLE 0 51 #define VCNL4035_DEV_ID_VAL 0x80 52 #define VCNL4035_ALS_IT_DEFAULT 0x01 53 #define VCNL4035_ALS_PERS_DEFAULT 0x00 54 #define VCNL4035_ALS_THDH_DEFAULT 5000 55 #define VCNL4035_ALS_THDL_DEFAULT 100 56 #define VCNL4035_SLEEP_DELAY_MS 2000 57 58 struct vcnl4035_data { 59 struct i2c_client *client; 60 struct regmap *regmap; 61 unsigned int als_it_val; 62 unsigned int als_persistence; 63 unsigned int als_thresh_low; 64 unsigned int als_thresh_high; 65 struct iio_trigger *drdy_trigger0; 66 }; 67 68 static inline bool vcnl4035_is_triggered(struct vcnl4035_data *data) 69 { 70 int ret; 71 int reg; 72 73 ret = regmap_read(data->regmap, VCNL4035_INT_FLAG, ®); 74 if (ret < 0) 75 return false; 76 77 return !!(reg & 78 (VCNL4035_INT_ALS_IF_H_MASK | VCNL4035_INT_ALS_IF_L_MASK)); 79 } 80 81 static irqreturn_t vcnl4035_drdy_irq_thread(int irq, void *private) 82 { 83 struct iio_dev *indio_dev = private; 84 struct vcnl4035_data *data = iio_priv(indio_dev); 85 86 if (vcnl4035_is_triggered(data)) { 87 iio_push_event(indio_dev, IIO_UNMOD_EVENT_CODE(IIO_LIGHT, 88 0, 89 IIO_EV_TYPE_THRESH, 90 IIO_EV_DIR_EITHER), 91 iio_get_time_ns(indio_dev)); 92 iio_trigger_poll_chained(data->drdy_trigger0); 93 return IRQ_HANDLED; 94 } 95 96 return IRQ_NONE; 97 } 98 99 /* Triggered buffer */ 100 static irqreturn_t vcnl4035_trigger_consumer_handler(int irq, void *p) 101 { 102 struct iio_poll_func *pf = p; 103 struct iio_dev *indio_dev = pf->indio_dev; 104 struct vcnl4035_data *data = iio_priv(indio_dev); 105 u8 buffer[ALIGN(sizeof(u16), sizeof(s64)) + sizeof(s64)]; 106 int ret; 107 108 ret = regmap_read(data->regmap, VCNL4035_ALS_DATA, (int *)buffer); 109 if (ret < 0) { 110 dev_err(&data->client->dev, 111 "Trigger consumer can't read from sensor.\n"); 112 goto fail_read; 113 } 114 iio_push_to_buffers_with_timestamp(indio_dev, buffer, 115 iio_get_time_ns(indio_dev)); 116 117 fail_read: 118 iio_trigger_notify_done(indio_dev->trig); 119 120 return IRQ_HANDLED; 121 } 122 123 static int vcnl4035_als_drdy_set_state(struct iio_trigger *trigger, 124 bool enable_drdy) 125 { 126 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trigger); 127 struct vcnl4035_data *data = iio_priv(indio_dev); 128 int val = enable_drdy ? VCNL4035_MODE_ALS_INT_ENABLE : 129 VCNL4035_MODE_ALS_INT_DISABLE; 130 131 return regmap_update_bits(data->regmap, VCNL4035_ALS_CONF, 132 VCNL4035_MODE_ALS_INT_MASK, 133 val); 134 } 135 136 static const struct iio_trigger_ops vcnl4035_trigger_ops = { 137 .validate_device = iio_trigger_validate_own_device, 138 .set_trigger_state = vcnl4035_als_drdy_set_state, 139 }; 140 141 static int vcnl4035_set_pm_runtime_state(struct vcnl4035_data *data, bool on) 142 { 143 int ret; 144 struct device *dev = &data->client->dev; 145 146 if (on) { 147 ret = pm_runtime_resume_and_get(dev); 148 } else { 149 pm_runtime_mark_last_busy(dev); 150 ret = pm_runtime_put_autosuspend(dev); 151 } 152 153 return ret; 154 } 155 156 /* 157 * Device IT INT Time (ms) Scale (lux/step) 158 * 000 50 0.064 159 * 001 100 0.032 160 * 010 200 0.016 161 * 100 400 0.008 162 * 101 - 111 800 0.004 163 * Values are proportional, so ALS INT is selected for input due to 164 * simplicity reason. Integration time value and scaling is 165 * calculated based on device INT value 166 * 167 * Raw value needs to be scaled using ALS steps 168 */ 169 static int vcnl4035_read_raw(struct iio_dev *indio_dev, 170 struct iio_chan_spec const *chan, int *val, 171 int *val2, long mask) 172 { 173 struct vcnl4035_data *data = iio_priv(indio_dev); 174 int ret; 175 int raw_data; 176 unsigned int reg; 177 178 switch (mask) { 179 case IIO_CHAN_INFO_RAW: 180 ret = vcnl4035_set_pm_runtime_state(data, true); 181 if (ret < 0) 182 return ret; 183 184 ret = iio_device_claim_direct_mode(indio_dev); 185 if (!ret) { 186 if (chan->channel) 187 reg = VCNL4035_ALS_DATA; 188 else 189 reg = VCNL4035_WHITE_DATA; 190 ret = regmap_read(data->regmap, reg, &raw_data); 191 iio_device_release_direct_mode(indio_dev); 192 if (!ret) { 193 *val = raw_data; 194 ret = IIO_VAL_INT; 195 } 196 } 197 vcnl4035_set_pm_runtime_state(data, false); 198 return ret; 199 case IIO_CHAN_INFO_INT_TIME: 200 *val = 50; 201 if (data->als_it_val) 202 *val = data->als_it_val * 100; 203 return IIO_VAL_INT; 204 case IIO_CHAN_INFO_SCALE: 205 *val = 64; 206 if (!data->als_it_val) 207 *val2 = 1000; 208 else 209 *val2 = data->als_it_val * 2 * 1000; 210 return IIO_VAL_FRACTIONAL; 211 default: 212 return -EINVAL; 213 } 214 } 215 216 static int vcnl4035_write_raw(struct iio_dev *indio_dev, 217 struct iio_chan_spec const *chan, 218 int val, int val2, long mask) 219 { 220 int ret; 221 struct vcnl4035_data *data = iio_priv(indio_dev); 222 223 switch (mask) { 224 case IIO_CHAN_INFO_INT_TIME: 225 if (val <= 0 || val > 800) 226 return -EINVAL; 227 228 ret = vcnl4035_set_pm_runtime_state(data, true); 229 if (ret < 0) 230 return ret; 231 232 ret = regmap_update_bits(data->regmap, VCNL4035_ALS_CONF, 233 VCNL4035_ALS_IT_MASK, 234 val / 100); 235 if (!ret) 236 data->als_it_val = val / 100; 237 238 vcnl4035_set_pm_runtime_state(data, false); 239 return ret; 240 default: 241 return -EINVAL; 242 } 243 } 244 245 /* No direct ABI for persistence and threshold, so eventing */ 246 static int vcnl4035_read_thresh(struct iio_dev *indio_dev, 247 const struct iio_chan_spec *chan, enum iio_event_type type, 248 enum iio_event_direction dir, enum iio_event_info info, 249 int *val, int *val2) 250 { 251 struct vcnl4035_data *data = iio_priv(indio_dev); 252 253 switch (info) { 254 case IIO_EV_INFO_VALUE: 255 switch (dir) { 256 case IIO_EV_DIR_RISING: 257 *val = data->als_thresh_high; 258 return IIO_VAL_INT; 259 case IIO_EV_DIR_FALLING: 260 *val = data->als_thresh_low; 261 return IIO_VAL_INT; 262 default: 263 return -EINVAL; 264 } 265 break; 266 case IIO_EV_INFO_PERIOD: 267 *val = data->als_persistence; 268 return IIO_VAL_INT; 269 default: 270 return -EINVAL; 271 } 272 273 } 274 275 static int vcnl4035_write_thresh(struct iio_dev *indio_dev, 276 const struct iio_chan_spec *chan, enum iio_event_type type, 277 enum iio_event_direction dir, enum iio_event_info info, int val, 278 int val2) 279 { 280 struct vcnl4035_data *data = iio_priv(indio_dev); 281 int ret; 282 283 switch (info) { 284 case IIO_EV_INFO_VALUE: 285 /* 16 bit threshold range 0 - 65535 */ 286 if (val < 0 || val > 65535) 287 return -EINVAL; 288 if (dir == IIO_EV_DIR_RISING) { 289 if (val < data->als_thresh_low) 290 return -EINVAL; 291 ret = regmap_write(data->regmap, VCNL4035_ALS_THDH, 292 val); 293 if (ret) 294 return ret; 295 data->als_thresh_high = val; 296 } else { 297 if (val > data->als_thresh_high) 298 return -EINVAL; 299 ret = regmap_write(data->regmap, VCNL4035_ALS_THDL, 300 val); 301 if (ret) 302 return ret; 303 data->als_thresh_low = val; 304 } 305 return ret; 306 case IIO_EV_INFO_PERIOD: 307 /* allow only 1 2 4 8 as persistence value */ 308 if (val < 0 || val > 8 || hweight8(val) != 1) 309 return -EINVAL; 310 ret = regmap_update_bits(data->regmap, VCNL4035_ALS_CONF, 311 VCNL4035_ALS_PERS_MASK, val); 312 if (!ret) 313 data->als_persistence = val; 314 return ret; 315 default: 316 return -EINVAL; 317 } 318 } 319 320 static IIO_CONST_ATTR_INT_TIME_AVAIL("50 100 200 400 800"); 321 322 static struct attribute *vcnl4035_attributes[] = { 323 &iio_const_attr_integration_time_available.dev_attr.attr, 324 NULL, 325 }; 326 327 static const struct attribute_group vcnl4035_attribute_group = { 328 .attrs = vcnl4035_attributes, 329 }; 330 331 static const struct iio_info vcnl4035_info = { 332 .read_raw = vcnl4035_read_raw, 333 .write_raw = vcnl4035_write_raw, 334 .read_event_value = vcnl4035_read_thresh, 335 .write_event_value = vcnl4035_write_thresh, 336 .attrs = &vcnl4035_attribute_group, 337 }; 338 339 static const struct iio_event_spec vcnl4035_event_spec[] = { 340 { 341 .type = IIO_EV_TYPE_THRESH, 342 .dir = IIO_EV_DIR_RISING, 343 .mask_separate = BIT(IIO_EV_INFO_VALUE), 344 }, { 345 .type = IIO_EV_TYPE_THRESH, 346 .dir = IIO_EV_DIR_FALLING, 347 .mask_separate = BIT(IIO_EV_INFO_VALUE), 348 }, { 349 .type = IIO_EV_TYPE_THRESH, 350 .dir = IIO_EV_DIR_EITHER, 351 .mask_separate = BIT(IIO_EV_INFO_PERIOD), 352 }, 353 }; 354 355 enum vcnl4035_scan_index_order { 356 VCNL4035_CHAN_INDEX_LIGHT, 357 VCNL4035_CHAN_INDEX_WHITE_LED, 358 }; 359 360 static const struct iio_buffer_setup_ops iio_triggered_buffer_setup_ops = { 361 .validate_scan_mask = &iio_validate_scan_mask_onehot, 362 }; 363 364 static const struct iio_chan_spec vcnl4035_channels[] = { 365 { 366 .type = IIO_LIGHT, 367 .channel = 0, 368 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 369 BIT(IIO_CHAN_INFO_INT_TIME) | 370 BIT(IIO_CHAN_INFO_SCALE), 371 .event_spec = vcnl4035_event_spec, 372 .num_event_specs = ARRAY_SIZE(vcnl4035_event_spec), 373 .scan_index = VCNL4035_CHAN_INDEX_LIGHT, 374 .scan_type = { 375 .sign = 'u', 376 .realbits = 16, 377 .storagebits = 16, 378 .endianness = IIO_LE, 379 }, 380 }, 381 { 382 .type = IIO_INTENSITY, 383 .channel = 1, 384 .modified = 1, 385 .channel2 = IIO_MOD_LIGHT_BOTH, 386 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 387 .scan_index = VCNL4035_CHAN_INDEX_WHITE_LED, 388 .scan_type = { 389 .sign = 'u', 390 .realbits = 16, 391 .storagebits = 16, 392 .endianness = IIO_LE, 393 }, 394 }, 395 }; 396 397 static int vcnl4035_set_als_power_state(struct vcnl4035_data *data, u8 status) 398 { 399 return regmap_update_bits(data->regmap, VCNL4035_ALS_CONF, 400 VCNL4035_MODE_ALS_MASK, 401 status); 402 } 403 404 static int vcnl4035_init(struct vcnl4035_data *data) 405 { 406 int ret; 407 int id; 408 409 ret = regmap_read(data->regmap, VCNL4035_DEV_ID, &id); 410 if (ret < 0) { 411 dev_err(&data->client->dev, "Failed to read DEV_ID register\n"); 412 return ret; 413 } 414 415 if (id != VCNL4035_DEV_ID_VAL) { 416 dev_err(&data->client->dev, "Wrong id, got %x, expected %x\n", 417 id, VCNL4035_DEV_ID_VAL); 418 return -ENODEV; 419 } 420 421 ret = vcnl4035_set_als_power_state(data, VCNL4035_MODE_ALS_ENABLE); 422 if (ret < 0) 423 return ret; 424 425 /* ALS white channel enable */ 426 ret = regmap_update_bits(data->regmap, VCNL4035_ALS_CONF, 427 VCNL4035_MODE_ALS_WHITE_CHAN, 428 1); 429 if (ret) { 430 dev_err(&data->client->dev, "set white channel enable %d\n", 431 ret); 432 return ret; 433 } 434 435 /* set default integration time - 100 ms for ALS */ 436 ret = regmap_update_bits(data->regmap, VCNL4035_ALS_CONF, 437 VCNL4035_ALS_IT_MASK, 438 VCNL4035_ALS_IT_DEFAULT); 439 if (ret) { 440 dev_err(&data->client->dev, "set default ALS IT returned %d\n", 441 ret); 442 return ret; 443 } 444 data->als_it_val = VCNL4035_ALS_IT_DEFAULT; 445 446 /* set default persistence time - 1 for ALS */ 447 ret = regmap_update_bits(data->regmap, VCNL4035_ALS_CONF, 448 VCNL4035_ALS_PERS_MASK, 449 VCNL4035_ALS_PERS_DEFAULT); 450 if (ret) { 451 dev_err(&data->client->dev, "set default PERS returned %d\n", 452 ret); 453 return ret; 454 } 455 data->als_persistence = VCNL4035_ALS_PERS_DEFAULT; 456 457 /* set default HIGH threshold for ALS */ 458 ret = regmap_write(data->regmap, VCNL4035_ALS_THDH, 459 VCNL4035_ALS_THDH_DEFAULT); 460 if (ret) { 461 dev_err(&data->client->dev, "set default THDH returned %d\n", 462 ret); 463 return ret; 464 } 465 data->als_thresh_high = VCNL4035_ALS_THDH_DEFAULT; 466 467 /* set default LOW threshold for ALS */ 468 ret = regmap_write(data->regmap, VCNL4035_ALS_THDL, 469 VCNL4035_ALS_THDL_DEFAULT); 470 if (ret) { 471 dev_err(&data->client->dev, "set default THDL returned %d\n", 472 ret); 473 return ret; 474 } 475 data->als_thresh_low = VCNL4035_ALS_THDL_DEFAULT; 476 477 return 0; 478 } 479 480 static bool vcnl4035_is_volatile_reg(struct device *dev, unsigned int reg) 481 { 482 switch (reg) { 483 case VCNL4035_ALS_CONF: 484 case VCNL4035_DEV_ID: 485 return false; 486 default: 487 return true; 488 } 489 } 490 491 static const struct regmap_config vcnl4035_regmap_config = { 492 .name = VCNL4035_REGMAP_NAME, 493 .reg_bits = 8, 494 .val_bits = 16, 495 .max_register = VCNL4035_DEV_ID, 496 .cache_type = REGCACHE_RBTREE, 497 .volatile_reg = vcnl4035_is_volatile_reg, 498 .val_format_endian = REGMAP_ENDIAN_LITTLE, 499 }; 500 501 static int vcnl4035_probe_trigger(struct iio_dev *indio_dev) 502 { 503 int ret; 504 struct vcnl4035_data *data = iio_priv(indio_dev); 505 506 data->drdy_trigger0 = devm_iio_trigger_alloc( 507 indio_dev->dev.parent, 508 "%s-dev%d", indio_dev->name, iio_device_id(indio_dev)); 509 if (!data->drdy_trigger0) 510 return -ENOMEM; 511 512 data->drdy_trigger0->ops = &vcnl4035_trigger_ops; 513 iio_trigger_set_drvdata(data->drdy_trigger0, indio_dev); 514 ret = devm_iio_trigger_register(indio_dev->dev.parent, 515 data->drdy_trigger0); 516 if (ret) { 517 dev_err(&data->client->dev, "iio trigger register failed\n"); 518 return ret; 519 } 520 521 /* Trigger setup */ 522 ret = devm_iio_triggered_buffer_setup(indio_dev->dev.parent, indio_dev, 523 NULL, vcnl4035_trigger_consumer_handler, 524 &iio_triggered_buffer_setup_ops); 525 if (ret < 0) { 526 dev_err(&data->client->dev, "iio triggered buffer setup failed\n"); 527 return ret; 528 } 529 530 /* IRQ to trigger mapping */ 531 ret = devm_request_threaded_irq(&data->client->dev, data->client->irq, 532 NULL, vcnl4035_drdy_irq_thread, 533 IRQF_TRIGGER_LOW | IRQF_ONESHOT, 534 VCNL4035_IRQ_NAME, indio_dev); 535 if (ret < 0) 536 dev_err(&data->client->dev, "request irq %d for trigger0 failed\n", 537 data->client->irq); 538 return ret; 539 } 540 541 static int vcnl4035_probe(struct i2c_client *client, 542 const struct i2c_device_id *id) 543 { 544 struct vcnl4035_data *data; 545 struct iio_dev *indio_dev; 546 struct regmap *regmap; 547 int ret; 548 549 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); 550 if (!indio_dev) 551 return -ENOMEM; 552 553 regmap = devm_regmap_init_i2c(client, &vcnl4035_regmap_config); 554 if (IS_ERR(regmap)) { 555 dev_err(&client->dev, "regmap_init failed!\n"); 556 return PTR_ERR(regmap); 557 } 558 559 data = iio_priv(indio_dev); 560 i2c_set_clientdata(client, indio_dev); 561 data->client = client; 562 data->regmap = regmap; 563 564 indio_dev->info = &vcnl4035_info; 565 indio_dev->name = VCNL4035_DRV_NAME; 566 indio_dev->channels = vcnl4035_channels; 567 indio_dev->num_channels = ARRAY_SIZE(vcnl4035_channels); 568 indio_dev->modes = INDIO_DIRECT_MODE; 569 570 ret = vcnl4035_init(data); 571 if (ret < 0) { 572 dev_err(&client->dev, "vcnl4035 chip init failed\n"); 573 return ret; 574 } 575 576 if (client->irq > 0) { 577 ret = vcnl4035_probe_trigger(indio_dev); 578 if (ret < 0) { 579 dev_err(&client->dev, "vcnl4035 unable init trigger\n"); 580 goto fail_poweroff; 581 } 582 } 583 584 ret = pm_runtime_set_active(&client->dev); 585 if (ret < 0) 586 goto fail_poweroff; 587 588 ret = iio_device_register(indio_dev); 589 if (ret < 0) 590 goto fail_poweroff; 591 592 pm_runtime_enable(&client->dev); 593 pm_runtime_set_autosuspend_delay(&client->dev, VCNL4035_SLEEP_DELAY_MS); 594 pm_runtime_use_autosuspend(&client->dev); 595 596 return 0; 597 598 fail_poweroff: 599 vcnl4035_set_als_power_state(data, VCNL4035_MODE_ALS_DISABLE); 600 return ret; 601 } 602 603 static int vcnl4035_remove(struct i2c_client *client) 604 { 605 struct iio_dev *indio_dev = i2c_get_clientdata(client); 606 607 pm_runtime_dont_use_autosuspend(&client->dev); 608 pm_runtime_disable(&client->dev); 609 iio_device_unregister(indio_dev); 610 pm_runtime_set_suspended(&client->dev); 611 612 return vcnl4035_set_als_power_state(iio_priv(indio_dev), 613 VCNL4035_MODE_ALS_DISABLE); 614 } 615 616 static int __maybe_unused vcnl4035_runtime_suspend(struct device *dev) 617 { 618 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); 619 struct vcnl4035_data *data = iio_priv(indio_dev); 620 int ret; 621 622 ret = vcnl4035_set_als_power_state(data, VCNL4035_MODE_ALS_DISABLE); 623 regcache_mark_dirty(data->regmap); 624 625 return ret; 626 } 627 628 static int __maybe_unused vcnl4035_runtime_resume(struct device *dev) 629 { 630 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); 631 struct vcnl4035_data *data = iio_priv(indio_dev); 632 int ret; 633 634 regcache_sync(data->regmap); 635 ret = vcnl4035_set_als_power_state(data, VCNL4035_MODE_ALS_ENABLE); 636 if (ret < 0) 637 return ret; 638 639 /* wait for 1 ALS integration cycle */ 640 msleep(data->als_it_val * 100); 641 642 return 0; 643 } 644 645 static const struct dev_pm_ops vcnl4035_pm_ops = { 646 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, 647 pm_runtime_force_resume) 648 SET_RUNTIME_PM_OPS(vcnl4035_runtime_suspend, 649 vcnl4035_runtime_resume, NULL) 650 }; 651 652 static const struct i2c_device_id vcnl4035_id[] = { 653 { "vcnl4035", 0}, 654 { } 655 }; 656 MODULE_DEVICE_TABLE(i2c, vcnl4035_id); 657 658 static const struct of_device_id vcnl4035_of_match[] = { 659 { .compatible = "vishay,vcnl4035", }, 660 { } 661 }; 662 MODULE_DEVICE_TABLE(of, vcnl4035_of_match); 663 664 static struct i2c_driver vcnl4035_driver = { 665 .driver = { 666 .name = VCNL4035_DRV_NAME, 667 .pm = &vcnl4035_pm_ops, 668 .of_match_table = vcnl4035_of_match, 669 }, 670 .probe = vcnl4035_probe, 671 .remove = vcnl4035_remove, 672 .id_table = vcnl4035_id, 673 }; 674 675 module_i2c_driver(vcnl4035_driver); 676 677 MODULE_AUTHOR("Parthiban Nallathambi <pn@denx.de>"); 678 MODULE_DESCRIPTION("VCNL4035 Ambient Light Sensor driver"); 679 MODULE_LICENSE("GPL v2"); 680