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/bitfield.h> 12 #include <linux/i2c.h> 13 #include <linux/module.h> 14 #include <linux/pm_runtime.h> 15 #include <linux/regmap.h> 16 17 #include <linux/iio/buffer.h> 18 #include <linux/iio/events.h> 19 #include <linux/iio/iio.h> 20 #include <linux/iio/sysfs.h> 21 #include <linux/iio/trigger.h> 22 #include <linux/iio/trigger_consumer.h> 23 #include <linux/iio/triggered_buffer.h> 24 25 #define VCNL4035_DRV_NAME "vcnl4035" 26 #define VCNL4035_IRQ_NAME "vcnl4035_event" 27 #define VCNL4035_REGMAP_NAME "vcnl4035_regmap" 28 29 /* Device registers */ 30 #define VCNL4035_ALS_CONF 0x00 31 #define VCNL4035_ALS_THDH 0x01 32 #define VCNL4035_ALS_THDL 0x02 33 #define VCNL4035_ALS_DATA 0x0B 34 #define VCNL4035_WHITE_DATA 0x0C 35 #define VCNL4035_INT_FLAG 0x0D 36 #define VCNL4035_DEV_ID 0x0E 37 38 /* Register masks */ 39 #define VCNL4035_MODE_ALS_MASK BIT(0) 40 #define VCNL4035_MODE_ALS_WHITE_CHAN BIT(8) 41 #define VCNL4035_MODE_ALS_INT_MASK BIT(1) 42 #define VCNL4035_ALS_IT_MASK GENMASK(7, 5) 43 #define VCNL4035_ALS_PERS_MASK GENMASK(3, 2) 44 #define VCNL4035_INT_ALS_IF_H_MASK BIT(12) 45 #define VCNL4035_INT_ALS_IF_L_MASK BIT(13) 46 #define VCNL4035_DEV_ID_MASK GENMASK(7, 0) 47 48 /* Default values */ 49 #define VCNL4035_MODE_ALS_ENABLE BIT(0) 50 #define VCNL4035_MODE_ALS_DISABLE 0x00 51 #define VCNL4035_MODE_ALS_INT_ENABLE BIT(1) 52 #define VCNL4035_MODE_ALS_INT_DISABLE 0 53 #define VCNL4035_DEV_ID_VAL 0x80 54 #define VCNL4035_ALS_IT_DEFAULT 0x01 55 #define VCNL4035_ALS_PERS_DEFAULT 0x00 56 #define VCNL4035_ALS_THDH_DEFAULT 5000 57 #define VCNL4035_ALS_THDL_DEFAULT 100 58 #define VCNL4035_SLEEP_DELAY_MS 2000 59 60 struct vcnl4035_data { 61 struct i2c_client *client; 62 struct regmap *regmap; 63 unsigned int als_it_val; 64 unsigned int als_persistence; 65 unsigned int als_thresh_low; 66 unsigned int als_thresh_high; 67 struct iio_trigger *drdy_trigger0; 68 }; 69 70 static inline bool vcnl4035_is_triggered(struct vcnl4035_data *data) 71 { 72 int ret; 73 int reg; 74 75 ret = regmap_read(data->regmap, VCNL4035_INT_FLAG, ®); 76 if (ret < 0) 77 return false; 78 79 return !!(reg & 80 (VCNL4035_INT_ALS_IF_H_MASK | VCNL4035_INT_ALS_IF_L_MASK)); 81 } 82 83 static irqreturn_t vcnl4035_drdy_irq_thread(int irq, void *private) 84 { 85 struct iio_dev *indio_dev = private; 86 struct vcnl4035_data *data = iio_priv(indio_dev); 87 88 if (vcnl4035_is_triggered(data)) { 89 iio_push_event(indio_dev, IIO_UNMOD_EVENT_CODE(IIO_LIGHT, 90 0, 91 IIO_EV_TYPE_THRESH, 92 IIO_EV_DIR_EITHER), 93 iio_get_time_ns(indio_dev)); 94 iio_trigger_poll_nested(data->drdy_trigger0); 95 return IRQ_HANDLED; 96 } 97 98 return IRQ_NONE; 99 } 100 101 /* Triggered buffer */ 102 static irqreturn_t vcnl4035_trigger_consumer_handler(int irq, void *p) 103 { 104 struct iio_poll_func *pf = p; 105 struct iio_dev *indio_dev = pf->indio_dev; 106 struct vcnl4035_data *data = iio_priv(indio_dev); 107 /* Ensure naturally aligned timestamp */ 108 u8 buffer[ALIGN(sizeof(u16), sizeof(s64)) + sizeof(s64)] __aligned(8) = { }; 109 int ret; 110 111 ret = regmap_read(data->regmap, VCNL4035_ALS_DATA, (int *)buffer); 112 if (ret < 0) { 113 dev_err(&data->client->dev, 114 "Trigger consumer can't read from sensor.\n"); 115 goto fail_read; 116 } 117 iio_push_to_buffers_with_timestamp(indio_dev, buffer, 118 iio_get_time_ns(indio_dev)); 119 120 fail_read: 121 iio_trigger_notify_done(indio_dev->trig); 122 123 return IRQ_HANDLED; 124 } 125 126 static int vcnl4035_als_drdy_set_state(struct iio_trigger *trigger, 127 bool enable_drdy) 128 { 129 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trigger); 130 struct vcnl4035_data *data = iio_priv(indio_dev); 131 int val = enable_drdy ? VCNL4035_MODE_ALS_INT_ENABLE : 132 VCNL4035_MODE_ALS_INT_DISABLE; 133 134 return regmap_update_bits(data->regmap, VCNL4035_ALS_CONF, 135 VCNL4035_MODE_ALS_INT_MASK, 136 val); 137 } 138 139 static const struct iio_trigger_ops vcnl4035_trigger_ops = { 140 .validate_device = iio_trigger_validate_own_device, 141 .set_trigger_state = vcnl4035_als_drdy_set_state, 142 }; 143 144 static int vcnl4035_set_pm_runtime_state(struct vcnl4035_data *data, bool on) 145 { 146 int ret; 147 struct device *dev = &data->client->dev; 148 149 if (on) { 150 ret = pm_runtime_resume_and_get(dev); 151 } else { 152 pm_runtime_mark_last_busy(dev); 153 ret = pm_runtime_put_autosuspend(dev); 154 } 155 156 return ret; 157 } 158 159 static int vcnl4035_read_info_raw(struct iio_dev *indio_dev, 160 struct iio_chan_spec const *chan, int *val) 161 { 162 struct vcnl4035_data *data = iio_priv(indio_dev); 163 int ret; 164 int raw_data; 165 unsigned int reg; 166 167 if (!iio_device_claim_direct(indio_dev)) 168 return -EBUSY; 169 170 if (chan->channel) 171 reg = VCNL4035_ALS_DATA; 172 else 173 reg = VCNL4035_WHITE_DATA; 174 ret = regmap_read(data->regmap, reg, &raw_data); 175 iio_device_release_direct(indio_dev); 176 if (ret) 177 return ret; 178 179 *val = raw_data; 180 181 return IIO_VAL_INT; 182 } 183 184 /* 185 * Device IT INT Time (ms) Scale (lux/step) 186 * 000 50 0.064 187 * 001 100 0.032 188 * 010 200 0.016 189 * 100 400 0.008 190 * 101 - 111 800 0.004 191 * Values are proportional, so ALS INT is selected for input due to 192 * simplicity reason. Integration time value and scaling is 193 * calculated based on device INT value 194 * 195 * Raw value needs to be scaled using ALS steps 196 */ 197 static int vcnl4035_read_raw(struct iio_dev *indio_dev, 198 struct iio_chan_spec const *chan, int *val, 199 int *val2, long mask) 200 { 201 struct vcnl4035_data *data = iio_priv(indio_dev); 202 int ret; 203 204 switch (mask) { 205 case IIO_CHAN_INFO_RAW: 206 ret = vcnl4035_set_pm_runtime_state(data, true); 207 if (ret < 0) 208 return ret; 209 ret = vcnl4035_read_info_raw(indio_dev, chan, val); 210 vcnl4035_set_pm_runtime_state(data, false); 211 return ret; 212 case IIO_CHAN_INFO_INT_TIME: 213 *val = 50; 214 if (data->als_it_val) 215 *val = data->als_it_val * 100; 216 return IIO_VAL_INT; 217 case IIO_CHAN_INFO_SCALE: 218 *val = 64; 219 if (!data->als_it_val) 220 *val2 = 1000; 221 else 222 *val2 = data->als_it_val * 2 * 1000; 223 return IIO_VAL_FRACTIONAL; 224 default: 225 return -EINVAL; 226 } 227 } 228 229 static int vcnl4035_write_raw(struct iio_dev *indio_dev, 230 struct iio_chan_spec const *chan, 231 int val, int val2, long mask) 232 { 233 int ret; 234 struct vcnl4035_data *data = iio_priv(indio_dev); 235 236 switch (mask) { 237 case IIO_CHAN_INFO_INT_TIME: 238 if (val <= 0 || val > 800) 239 return -EINVAL; 240 241 ret = vcnl4035_set_pm_runtime_state(data, true); 242 if (ret < 0) 243 return ret; 244 245 ret = regmap_update_bits(data->regmap, VCNL4035_ALS_CONF, 246 VCNL4035_ALS_IT_MASK, 247 val / 100); 248 if (!ret) 249 data->als_it_val = val / 100; 250 251 vcnl4035_set_pm_runtime_state(data, false); 252 return ret; 253 default: 254 return -EINVAL; 255 } 256 } 257 258 /* No direct ABI for persistence and threshold, so eventing */ 259 static int vcnl4035_read_thresh(struct iio_dev *indio_dev, 260 const struct iio_chan_spec *chan, enum iio_event_type type, 261 enum iio_event_direction dir, enum iio_event_info info, 262 int *val, int *val2) 263 { 264 struct vcnl4035_data *data = iio_priv(indio_dev); 265 266 switch (info) { 267 case IIO_EV_INFO_VALUE: 268 switch (dir) { 269 case IIO_EV_DIR_RISING: 270 *val = data->als_thresh_high; 271 return IIO_VAL_INT; 272 case IIO_EV_DIR_FALLING: 273 *val = data->als_thresh_low; 274 return IIO_VAL_INT; 275 default: 276 return -EINVAL; 277 } 278 break; 279 case IIO_EV_INFO_PERIOD: 280 *val = data->als_persistence; 281 return IIO_VAL_INT; 282 default: 283 return -EINVAL; 284 } 285 286 } 287 288 static int vcnl4035_write_thresh(struct iio_dev *indio_dev, 289 const struct iio_chan_spec *chan, enum iio_event_type type, 290 enum iio_event_direction dir, enum iio_event_info info, int val, 291 int val2) 292 { 293 struct vcnl4035_data *data = iio_priv(indio_dev); 294 int ret; 295 296 switch (info) { 297 case IIO_EV_INFO_VALUE: 298 /* 16 bit threshold range 0 - 65535 */ 299 if (val < 0 || val > 65535) 300 return -EINVAL; 301 if (dir == IIO_EV_DIR_RISING) { 302 if (val < data->als_thresh_low) 303 return -EINVAL; 304 ret = regmap_write(data->regmap, VCNL4035_ALS_THDH, 305 val); 306 if (ret) 307 return ret; 308 data->als_thresh_high = val; 309 } else { 310 if (val > data->als_thresh_high) 311 return -EINVAL; 312 ret = regmap_write(data->regmap, VCNL4035_ALS_THDL, 313 val); 314 if (ret) 315 return ret; 316 data->als_thresh_low = val; 317 } 318 return ret; 319 case IIO_EV_INFO_PERIOD: 320 /* allow only 1 2 4 8 as persistence value */ 321 if (val < 0 || val > 8 || hweight8(val) != 1) 322 return -EINVAL; 323 ret = regmap_update_bits(data->regmap, VCNL4035_ALS_CONF, 324 VCNL4035_ALS_PERS_MASK, val); 325 if (!ret) 326 data->als_persistence = val; 327 return ret; 328 default: 329 return -EINVAL; 330 } 331 } 332 333 static IIO_CONST_ATTR_INT_TIME_AVAIL("50 100 200 400 800"); 334 335 static struct attribute *vcnl4035_attributes[] = { 336 &iio_const_attr_integration_time_available.dev_attr.attr, 337 NULL, 338 }; 339 340 static const struct attribute_group vcnl4035_attribute_group = { 341 .attrs = vcnl4035_attributes, 342 }; 343 344 static const struct iio_info vcnl4035_info = { 345 .read_raw = vcnl4035_read_raw, 346 .write_raw = vcnl4035_write_raw, 347 .read_event_value = vcnl4035_read_thresh, 348 .write_event_value = vcnl4035_write_thresh, 349 .attrs = &vcnl4035_attribute_group, 350 }; 351 352 static const struct iio_event_spec vcnl4035_event_spec[] = { 353 { 354 .type = IIO_EV_TYPE_THRESH, 355 .dir = IIO_EV_DIR_RISING, 356 .mask_separate = BIT(IIO_EV_INFO_VALUE), 357 }, { 358 .type = IIO_EV_TYPE_THRESH, 359 .dir = IIO_EV_DIR_FALLING, 360 .mask_separate = BIT(IIO_EV_INFO_VALUE), 361 }, { 362 .type = IIO_EV_TYPE_THRESH, 363 .dir = IIO_EV_DIR_EITHER, 364 .mask_separate = BIT(IIO_EV_INFO_PERIOD), 365 }, 366 }; 367 368 enum vcnl4035_scan_index_order { 369 VCNL4035_CHAN_INDEX_LIGHT, 370 VCNL4035_CHAN_INDEX_WHITE_LED, 371 }; 372 373 static const struct iio_buffer_setup_ops iio_triggered_buffer_setup_ops = { 374 .validate_scan_mask = &iio_validate_scan_mask_onehot, 375 }; 376 377 static const struct iio_chan_spec vcnl4035_channels[] = { 378 { 379 .type = IIO_LIGHT, 380 .channel = 0, 381 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 382 BIT(IIO_CHAN_INFO_INT_TIME) | 383 BIT(IIO_CHAN_INFO_SCALE), 384 .event_spec = vcnl4035_event_spec, 385 .num_event_specs = ARRAY_SIZE(vcnl4035_event_spec), 386 .scan_index = VCNL4035_CHAN_INDEX_LIGHT, 387 .scan_type = { 388 .sign = 'u', 389 .realbits = 16, 390 .storagebits = 16, 391 .endianness = IIO_LE, 392 }, 393 }, 394 { 395 .type = IIO_INTENSITY, 396 .channel = 1, 397 .modified = 1, 398 .channel2 = IIO_MOD_LIGHT_BOTH, 399 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 400 .scan_index = VCNL4035_CHAN_INDEX_WHITE_LED, 401 .scan_type = { 402 .sign = 'u', 403 .realbits = 16, 404 .storagebits = 16, 405 .endianness = IIO_LE, 406 }, 407 }, 408 }; 409 410 static int vcnl4035_set_als_power_state(struct vcnl4035_data *data, u8 status) 411 { 412 return regmap_update_bits(data->regmap, VCNL4035_ALS_CONF, 413 VCNL4035_MODE_ALS_MASK, 414 status); 415 } 416 417 static int vcnl4035_init(struct vcnl4035_data *data) 418 { 419 int ret; 420 int id; 421 422 ret = regmap_read(data->regmap, VCNL4035_DEV_ID, &id); 423 if (ret < 0) { 424 dev_err(&data->client->dev, "Failed to read DEV_ID register\n"); 425 return ret; 426 } 427 428 id = FIELD_GET(VCNL4035_DEV_ID_MASK, id); 429 if (id != VCNL4035_DEV_ID_VAL) { 430 dev_err(&data->client->dev, "Wrong id, got %x, expected %x\n", 431 id, VCNL4035_DEV_ID_VAL); 432 return -ENODEV; 433 } 434 435 ret = vcnl4035_set_als_power_state(data, VCNL4035_MODE_ALS_ENABLE); 436 if (ret < 0) 437 return ret; 438 439 /* ALS white channel enable */ 440 ret = regmap_update_bits(data->regmap, VCNL4035_ALS_CONF, 441 VCNL4035_MODE_ALS_WHITE_CHAN, 442 1); 443 if (ret) { 444 dev_err(&data->client->dev, "set white channel enable %d\n", 445 ret); 446 return ret; 447 } 448 449 /* set default integration time - 100 ms for ALS */ 450 ret = regmap_update_bits(data->regmap, VCNL4035_ALS_CONF, 451 VCNL4035_ALS_IT_MASK, 452 VCNL4035_ALS_IT_DEFAULT); 453 if (ret) { 454 dev_err(&data->client->dev, "set default ALS IT returned %d\n", 455 ret); 456 return ret; 457 } 458 data->als_it_val = VCNL4035_ALS_IT_DEFAULT; 459 460 /* set default persistence time - 1 for ALS */ 461 ret = regmap_update_bits(data->regmap, VCNL4035_ALS_CONF, 462 VCNL4035_ALS_PERS_MASK, 463 VCNL4035_ALS_PERS_DEFAULT); 464 if (ret) { 465 dev_err(&data->client->dev, "set default PERS returned %d\n", 466 ret); 467 return ret; 468 } 469 data->als_persistence = VCNL4035_ALS_PERS_DEFAULT; 470 471 /* set default HIGH threshold for ALS */ 472 ret = regmap_write(data->regmap, VCNL4035_ALS_THDH, 473 VCNL4035_ALS_THDH_DEFAULT); 474 if (ret) { 475 dev_err(&data->client->dev, "set default THDH returned %d\n", 476 ret); 477 return ret; 478 } 479 data->als_thresh_high = VCNL4035_ALS_THDH_DEFAULT; 480 481 /* set default LOW threshold for ALS */ 482 ret = regmap_write(data->regmap, VCNL4035_ALS_THDL, 483 VCNL4035_ALS_THDL_DEFAULT); 484 if (ret) { 485 dev_err(&data->client->dev, "set default THDL returned %d\n", 486 ret); 487 return ret; 488 } 489 data->als_thresh_low = VCNL4035_ALS_THDL_DEFAULT; 490 491 return 0; 492 } 493 494 static bool vcnl4035_is_volatile_reg(struct device *dev, unsigned int reg) 495 { 496 switch (reg) { 497 case VCNL4035_ALS_CONF: 498 case VCNL4035_DEV_ID: 499 return false; 500 default: 501 return true; 502 } 503 } 504 505 static const struct regmap_config vcnl4035_regmap_config = { 506 .name = VCNL4035_REGMAP_NAME, 507 .reg_bits = 8, 508 .val_bits = 16, 509 .max_register = VCNL4035_DEV_ID, 510 .cache_type = REGCACHE_RBTREE, 511 .volatile_reg = vcnl4035_is_volatile_reg, 512 .val_format_endian = REGMAP_ENDIAN_LITTLE, 513 }; 514 515 static int vcnl4035_probe_trigger(struct iio_dev *indio_dev) 516 { 517 int ret; 518 struct vcnl4035_data *data = iio_priv(indio_dev); 519 520 data->drdy_trigger0 = devm_iio_trigger_alloc( 521 indio_dev->dev.parent, 522 "%s-dev%d", indio_dev->name, iio_device_id(indio_dev)); 523 if (!data->drdy_trigger0) 524 return -ENOMEM; 525 526 data->drdy_trigger0->ops = &vcnl4035_trigger_ops; 527 iio_trigger_set_drvdata(data->drdy_trigger0, indio_dev); 528 ret = devm_iio_trigger_register(indio_dev->dev.parent, 529 data->drdy_trigger0); 530 if (ret) { 531 dev_err(&data->client->dev, "iio trigger register failed\n"); 532 return ret; 533 } 534 535 /* Trigger setup */ 536 ret = devm_iio_triggered_buffer_setup(indio_dev->dev.parent, indio_dev, 537 NULL, vcnl4035_trigger_consumer_handler, 538 &iio_triggered_buffer_setup_ops); 539 if (ret < 0) { 540 dev_err(&data->client->dev, "iio triggered buffer setup failed\n"); 541 return ret; 542 } 543 544 /* IRQ to trigger mapping */ 545 ret = devm_request_threaded_irq(&data->client->dev, data->client->irq, 546 NULL, vcnl4035_drdy_irq_thread, 547 IRQF_TRIGGER_LOW | IRQF_ONESHOT, 548 VCNL4035_IRQ_NAME, indio_dev); 549 if (ret < 0) 550 dev_err(&data->client->dev, "request irq %d for trigger0 failed\n", 551 data->client->irq); 552 return ret; 553 } 554 555 static int vcnl4035_probe(struct i2c_client *client) 556 { 557 struct vcnl4035_data *data; 558 struct iio_dev *indio_dev; 559 struct regmap *regmap; 560 int ret; 561 562 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); 563 if (!indio_dev) 564 return -ENOMEM; 565 566 regmap = devm_regmap_init_i2c(client, &vcnl4035_regmap_config); 567 if (IS_ERR(regmap)) { 568 dev_err(&client->dev, "regmap_init failed!\n"); 569 return PTR_ERR(regmap); 570 } 571 572 data = iio_priv(indio_dev); 573 i2c_set_clientdata(client, indio_dev); 574 data->client = client; 575 data->regmap = regmap; 576 577 indio_dev->info = &vcnl4035_info; 578 indio_dev->name = VCNL4035_DRV_NAME; 579 indio_dev->channels = vcnl4035_channels; 580 indio_dev->num_channels = ARRAY_SIZE(vcnl4035_channels); 581 indio_dev->modes = INDIO_DIRECT_MODE; 582 583 ret = vcnl4035_init(data); 584 if (ret < 0) { 585 dev_err(&client->dev, "vcnl4035 chip init failed\n"); 586 return ret; 587 } 588 589 if (client->irq > 0) { 590 ret = vcnl4035_probe_trigger(indio_dev); 591 if (ret < 0) { 592 dev_err(&client->dev, "vcnl4035 unable init trigger\n"); 593 goto fail_poweroff; 594 } 595 } 596 597 ret = pm_runtime_set_active(&client->dev); 598 if (ret < 0) 599 goto fail_poweroff; 600 601 ret = iio_device_register(indio_dev); 602 if (ret < 0) 603 goto fail_poweroff; 604 605 pm_runtime_enable(&client->dev); 606 pm_runtime_set_autosuspend_delay(&client->dev, VCNL4035_SLEEP_DELAY_MS); 607 pm_runtime_use_autosuspend(&client->dev); 608 609 return 0; 610 611 fail_poweroff: 612 vcnl4035_set_als_power_state(data, VCNL4035_MODE_ALS_DISABLE); 613 return ret; 614 } 615 616 static void vcnl4035_remove(struct i2c_client *client) 617 { 618 struct iio_dev *indio_dev = i2c_get_clientdata(client); 619 int ret; 620 621 pm_runtime_dont_use_autosuspend(&client->dev); 622 pm_runtime_disable(&client->dev); 623 iio_device_unregister(indio_dev); 624 pm_runtime_set_suspended(&client->dev); 625 626 ret = vcnl4035_set_als_power_state(iio_priv(indio_dev), 627 VCNL4035_MODE_ALS_DISABLE); 628 if (ret) 629 dev_warn(&client->dev, "Failed to put device into standby (%pe)\n", 630 ERR_PTR(ret)); 631 } 632 633 static int vcnl4035_runtime_suspend(struct device *dev) 634 { 635 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); 636 struct vcnl4035_data *data = iio_priv(indio_dev); 637 int ret; 638 639 ret = vcnl4035_set_als_power_state(data, VCNL4035_MODE_ALS_DISABLE); 640 regcache_mark_dirty(data->regmap); 641 642 return ret; 643 } 644 645 static int vcnl4035_runtime_resume(struct device *dev) 646 { 647 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); 648 struct vcnl4035_data *data = iio_priv(indio_dev); 649 int ret; 650 651 regcache_sync(data->regmap); 652 ret = vcnl4035_set_als_power_state(data, VCNL4035_MODE_ALS_ENABLE); 653 if (ret < 0) 654 return ret; 655 656 /* wait for 1 ALS integration cycle */ 657 msleep(data->als_it_val * 100); 658 659 return 0; 660 } 661 662 static DEFINE_RUNTIME_DEV_PM_OPS(vcnl4035_pm_ops, vcnl4035_runtime_suspend, 663 vcnl4035_runtime_resume, NULL); 664 665 static const struct i2c_device_id vcnl4035_id[] = { 666 { "vcnl4035" }, 667 { } 668 }; 669 MODULE_DEVICE_TABLE(i2c, vcnl4035_id); 670 671 static const struct of_device_id vcnl4035_of_match[] = { 672 { .compatible = "vishay,vcnl4035", }, 673 { } 674 }; 675 MODULE_DEVICE_TABLE(of, vcnl4035_of_match); 676 677 static struct i2c_driver vcnl4035_driver = { 678 .driver = { 679 .name = VCNL4035_DRV_NAME, 680 .pm = pm_ptr(&vcnl4035_pm_ops), 681 .of_match_table = vcnl4035_of_match, 682 }, 683 .probe = vcnl4035_probe, 684 .remove = vcnl4035_remove, 685 .id_table = vcnl4035_id, 686 }; 687 688 module_i2c_driver(vcnl4035_driver); 689 690 MODULE_AUTHOR("Parthiban Nallathambi <pn@denx.de>"); 691 MODULE_DESCRIPTION("VCNL4035 Ambient Light Sensor driver"); 692 MODULE_LICENSE("GPL v2"); 693