1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Sensortek STK3310/STK3311 Ambient Light and Proximity Sensor 4 * 5 * Copyright (c) 2015, Intel Corporation. 6 * 7 * IIO driver for STK3310/STK3311. 7-bit I2C address: 0x48. 8 */ 9 10 #include <linux/i2c.h> 11 #include <linux/interrupt.h> 12 #include <linux/kernel.h> 13 #include <linux/module.h> 14 #include <linux/mod_devicetable.h> 15 #include <linux/regmap.h> 16 #include <linux/iio/events.h> 17 #include <linux/iio/iio.h> 18 #include <linux/iio/sysfs.h> 19 20 #define STK3310_REG_STATE 0x00 21 #define STK3310_REG_PSCTRL 0x01 22 #define STK3310_REG_ALSCTRL 0x02 23 #define STK3310_REG_INT 0x04 24 #define STK3310_REG_THDH_PS 0x06 25 #define STK3310_REG_THDL_PS 0x08 26 #define STK3310_REG_FLAG 0x10 27 #define STK3310_REG_PS_DATA_MSB 0x11 28 #define STK3310_REG_PS_DATA_LSB 0x12 29 #define STK3310_REG_ALS_DATA_MSB 0x13 30 #define STK3310_REG_ALS_DATA_LSB 0x14 31 #define STK3310_REG_ID 0x3E 32 #define STK3310_MAX_REG 0x80 33 34 #define STK3310_STATE_EN_PS BIT(0) 35 #define STK3310_STATE_EN_ALS BIT(1) 36 #define STK3310_STATE_STANDBY 0x00 37 38 #define STK3310_CHIP_ID_VAL 0x13 39 #define STK3311_CHIP_ID_VAL 0x1D 40 #define STK3311A_CHIP_ID_VAL 0x15 41 #define STK3311S34_CHIP_ID_VAL 0x1E 42 #define STK3311X_CHIP_ID_VAL 0x12 43 #define STK3335_CHIP_ID_VAL 0x51 44 #define STK3310_PSINT_EN 0x01 45 #define STK3310_PS_MAX_VAL 0xFFFF 46 47 #define STK3310_DRIVER_NAME "stk3310" 48 #define STK3310_REGMAP_NAME "stk3310_regmap" 49 #define STK3310_EVENT "stk3310_event" 50 51 #define STK3310_SCALE_AVAILABLE "6.4 1.6 0.4 0.1" 52 53 #define STK3310_IT_AVAILABLE \ 54 "0.000185 0.000370 0.000741 0.001480 0.002960 0.005920 0.011840 " \ 55 "0.023680 0.047360 0.094720 0.189440 0.378880 0.757760 1.515520 " \ 56 "3.031040 6.062080" 57 58 #define STK3310_REGFIELD(name) \ 59 do { \ 60 data->reg_##name = \ 61 devm_regmap_field_alloc(&client->dev, regmap, \ 62 stk3310_reg_field_##name); \ 63 if (IS_ERR(data->reg_##name)) { \ 64 dev_err(&client->dev, "reg field alloc failed.\n"); \ 65 return PTR_ERR(data->reg_##name); \ 66 } \ 67 } while (0) 68 69 static const struct reg_field stk3310_reg_field_state = 70 REG_FIELD(STK3310_REG_STATE, 0, 2); 71 static const struct reg_field stk3310_reg_field_als_gain = 72 REG_FIELD(STK3310_REG_ALSCTRL, 4, 5); 73 static const struct reg_field stk3310_reg_field_ps_gain = 74 REG_FIELD(STK3310_REG_PSCTRL, 4, 5); 75 static const struct reg_field stk3310_reg_field_als_it = 76 REG_FIELD(STK3310_REG_ALSCTRL, 0, 3); 77 static const struct reg_field stk3310_reg_field_ps_it = 78 REG_FIELD(STK3310_REG_PSCTRL, 0, 3); 79 static const struct reg_field stk3310_reg_field_int_ps = 80 REG_FIELD(STK3310_REG_INT, 0, 2); 81 static const struct reg_field stk3310_reg_field_flag_psint = 82 REG_FIELD(STK3310_REG_FLAG, 4, 4); 83 static const struct reg_field stk3310_reg_field_flag_nf = 84 REG_FIELD(STK3310_REG_FLAG, 0, 0); 85 86 static const u8 stk3310_chip_ids[] = { 87 STK3310_CHIP_ID_VAL, 88 STK3311A_CHIP_ID_VAL, 89 STK3311S34_CHIP_ID_VAL, 90 STK3311X_CHIP_ID_VAL, 91 STK3311_CHIP_ID_VAL, 92 STK3335_CHIP_ID_VAL, 93 }; 94 95 /* Estimate maximum proximity values with regard to measurement scale. */ 96 static const int stk3310_ps_max[4] = { 97 STK3310_PS_MAX_VAL / 640, 98 STK3310_PS_MAX_VAL / 160, 99 STK3310_PS_MAX_VAL / 40, 100 STK3310_PS_MAX_VAL / 10 101 }; 102 103 static const int stk3310_scale_table[][2] = { 104 {6, 400000}, {1, 600000}, {0, 400000}, {0, 100000} 105 }; 106 107 /* Integration time in seconds, microseconds */ 108 static const int stk3310_it_table[][2] = { 109 {0, 185}, {0, 370}, {0, 741}, {0, 1480}, 110 {0, 2960}, {0, 5920}, {0, 11840}, {0, 23680}, 111 {0, 47360}, {0, 94720}, {0, 189440}, {0, 378880}, 112 {0, 757760}, {1, 515520}, {3, 31040}, {6, 62080}, 113 }; 114 115 struct stk3310_data { 116 struct i2c_client *client; 117 struct mutex lock; 118 bool als_enabled; 119 bool ps_enabled; 120 uint32_t ps_near_level; 121 u64 timestamp; 122 struct regmap *regmap; 123 struct regmap_field *reg_state; 124 struct regmap_field *reg_als_gain; 125 struct regmap_field *reg_ps_gain; 126 struct regmap_field *reg_als_it; 127 struct regmap_field *reg_ps_it; 128 struct regmap_field *reg_int_ps; 129 struct regmap_field *reg_flag_psint; 130 struct regmap_field *reg_flag_nf; 131 }; 132 133 static const struct iio_event_spec stk3310_events[] = { 134 /* Proximity event */ 135 { 136 .type = IIO_EV_TYPE_THRESH, 137 .dir = IIO_EV_DIR_RISING, 138 .mask_separate = BIT(IIO_EV_INFO_VALUE) | 139 BIT(IIO_EV_INFO_ENABLE), 140 }, 141 /* Out-of-proximity event */ 142 { 143 .type = IIO_EV_TYPE_THRESH, 144 .dir = IIO_EV_DIR_FALLING, 145 .mask_separate = BIT(IIO_EV_INFO_VALUE) | 146 BIT(IIO_EV_INFO_ENABLE), 147 }, 148 }; 149 150 static ssize_t stk3310_read_near_level(struct iio_dev *indio_dev, 151 uintptr_t priv, 152 const struct iio_chan_spec *chan, 153 char *buf) 154 { 155 struct stk3310_data *data = iio_priv(indio_dev); 156 157 return sprintf(buf, "%u\n", data->ps_near_level); 158 } 159 160 static const struct iio_chan_spec_ext_info stk3310_ext_info[] = { 161 { 162 .name = "nearlevel", 163 .shared = IIO_SEPARATE, 164 .read = stk3310_read_near_level, 165 }, 166 { /* sentinel */ } 167 }; 168 169 static const struct iio_chan_spec stk3310_channels[] = { 170 { 171 .type = IIO_LIGHT, 172 .info_mask_separate = 173 BIT(IIO_CHAN_INFO_RAW) | 174 BIT(IIO_CHAN_INFO_SCALE) | 175 BIT(IIO_CHAN_INFO_INT_TIME), 176 }, 177 { 178 .type = IIO_PROXIMITY, 179 .info_mask_separate = 180 BIT(IIO_CHAN_INFO_RAW) | 181 BIT(IIO_CHAN_INFO_SCALE) | 182 BIT(IIO_CHAN_INFO_INT_TIME), 183 .event_spec = stk3310_events, 184 .num_event_specs = ARRAY_SIZE(stk3310_events), 185 .ext_info = stk3310_ext_info, 186 } 187 }; 188 189 static IIO_CONST_ATTR(in_illuminance_scale_available, STK3310_SCALE_AVAILABLE); 190 191 static IIO_CONST_ATTR(in_proximity_scale_available, STK3310_SCALE_AVAILABLE); 192 193 static IIO_CONST_ATTR(in_illuminance_integration_time_available, 194 STK3310_IT_AVAILABLE); 195 196 static IIO_CONST_ATTR(in_proximity_integration_time_available, 197 STK3310_IT_AVAILABLE); 198 199 static struct attribute *stk3310_attributes[] = { 200 &iio_const_attr_in_illuminance_scale_available.dev_attr.attr, 201 &iio_const_attr_in_proximity_scale_available.dev_attr.attr, 202 &iio_const_attr_in_illuminance_integration_time_available.dev_attr.attr, 203 &iio_const_attr_in_proximity_integration_time_available.dev_attr.attr, 204 NULL, 205 }; 206 207 static const struct attribute_group stk3310_attribute_group = { 208 .attrs = stk3310_attributes 209 }; 210 211 static int stk3310_check_chip_id(const u8 chip_id) 212 { 213 for (int i = 0; i < ARRAY_SIZE(stk3310_chip_ids); i++) { 214 if (chip_id == stk3310_chip_ids[i]) 215 return 0; 216 } 217 218 return -ENODEV; 219 } 220 221 static int stk3310_get_index(const int table[][2], int table_size, 222 int val, int val2) 223 { 224 int i; 225 226 for (i = 0; i < table_size; i++) { 227 if (val == table[i][0] && val2 == table[i][1]) 228 return i; 229 } 230 231 return -EINVAL; 232 } 233 234 static int stk3310_read_event(struct iio_dev *indio_dev, 235 const struct iio_chan_spec *chan, 236 enum iio_event_type type, 237 enum iio_event_direction dir, 238 enum iio_event_info info, 239 int *val, int *val2) 240 { 241 u8 reg; 242 __be16 buf; 243 int ret; 244 struct stk3310_data *data = iio_priv(indio_dev); 245 246 if (info != IIO_EV_INFO_VALUE) 247 return -EINVAL; 248 249 /* Only proximity interrupts are implemented at the moment. */ 250 if (dir == IIO_EV_DIR_RISING) 251 reg = STK3310_REG_THDH_PS; 252 else if (dir == IIO_EV_DIR_FALLING) 253 reg = STK3310_REG_THDL_PS; 254 else 255 return -EINVAL; 256 257 mutex_lock(&data->lock); 258 ret = regmap_bulk_read(data->regmap, reg, &buf, 2); 259 mutex_unlock(&data->lock); 260 if (ret < 0) { 261 dev_err(&data->client->dev, "register read failed\n"); 262 return ret; 263 } 264 *val = be16_to_cpu(buf); 265 266 return IIO_VAL_INT; 267 } 268 269 static int stk3310_write_event(struct iio_dev *indio_dev, 270 const struct iio_chan_spec *chan, 271 enum iio_event_type type, 272 enum iio_event_direction dir, 273 enum iio_event_info info, 274 int val, int val2) 275 { 276 u8 reg; 277 __be16 buf; 278 int ret; 279 unsigned int index; 280 struct stk3310_data *data = iio_priv(indio_dev); 281 struct i2c_client *client = data->client; 282 283 ret = regmap_field_read(data->reg_ps_gain, &index); 284 if (ret < 0) 285 return ret; 286 287 if (val < 0 || val > stk3310_ps_max[index]) 288 return -EINVAL; 289 290 if (dir == IIO_EV_DIR_RISING) 291 reg = STK3310_REG_THDH_PS; 292 else if (dir == IIO_EV_DIR_FALLING) 293 reg = STK3310_REG_THDL_PS; 294 else 295 return -EINVAL; 296 297 buf = cpu_to_be16(val); 298 ret = regmap_bulk_write(data->regmap, reg, &buf, 2); 299 if (ret < 0) 300 dev_err(&client->dev, "failed to set PS threshold!\n"); 301 302 return ret; 303 } 304 305 static int stk3310_read_event_config(struct iio_dev *indio_dev, 306 const struct iio_chan_spec *chan, 307 enum iio_event_type type, 308 enum iio_event_direction dir) 309 { 310 unsigned int event_val; 311 int ret; 312 struct stk3310_data *data = iio_priv(indio_dev); 313 314 ret = regmap_field_read(data->reg_int_ps, &event_val); 315 if (ret < 0) 316 return ret; 317 318 return event_val; 319 } 320 321 static int stk3310_write_event_config(struct iio_dev *indio_dev, 322 const struct iio_chan_spec *chan, 323 enum iio_event_type type, 324 enum iio_event_direction dir, 325 int state) 326 { 327 int ret; 328 struct stk3310_data *data = iio_priv(indio_dev); 329 struct i2c_client *client = data->client; 330 331 if (state < 0 || state > 7) 332 return -EINVAL; 333 334 /* Set INT_PS value */ 335 mutex_lock(&data->lock); 336 ret = regmap_field_write(data->reg_int_ps, state); 337 if (ret < 0) 338 dev_err(&client->dev, "failed to set interrupt mode\n"); 339 mutex_unlock(&data->lock); 340 341 return ret; 342 } 343 344 static int stk3310_read_raw(struct iio_dev *indio_dev, 345 struct iio_chan_spec const *chan, 346 int *val, int *val2, long mask) 347 { 348 u8 reg; 349 __be16 buf; 350 int ret; 351 unsigned int index; 352 struct stk3310_data *data = iio_priv(indio_dev); 353 struct i2c_client *client = data->client; 354 355 if (chan->type != IIO_LIGHT && chan->type != IIO_PROXIMITY) 356 return -EINVAL; 357 358 switch (mask) { 359 case IIO_CHAN_INFO_RAW: 360 if (chan->type == IIO_LIGHT) 361 reg = STK3310_REG_ALS_DATA_MSB; 362 else 363 reg = STK3310_REG_PS_DATA_MSB; 364 365 mutex_lock(&data->lock); 366 ret = regmap_bulk_read(data->regmap, reg, &buf, 2); 367 if (ret < 0) { 368 dev_err(&client->dev, "register read failed\n"); 369 mutex_unlock(&data->lock); 370 return ret; 371 } 372 *val = be16_to_cpu(buf); 373 mutex_unlock(&data->lock); 374 return IIO_VAL_INT; 375 case IIO_CHAN_INFO_INT_TIME: 376 if (chan->type == IIO_LIGHT) 377 ret = regmap_field_read(data->reg_als_it, &index); 378 else 379 ret = regmap_field_read(data->reg_ps_it, &index); 380 if (ret < 0) 381 return ret; 382 383 *val = stk3310_it_table[index][0]; 384 *val2 = stk3310_it_table[index][1]; 385 return IIO_VAL_INT_PLUS_MICRO; 386 case IIO_CHAN_INFO_SCALE: 387 if (chan->type == IIO_LIGHT) 388 ret = regmap_field_read(data->reg_als_gain, &index); 389 else 390 ret = regmap_field_read(data->reg_ps_gain, &index); 391 if (ret < 0) 392 return ret; 393 394 *val = stk3310_scale_table[index][0]; 395 *val2 = stk3310_scale_table[index][1]; 396 return IIO_VAL_INT_PLUS_MICRO; 397 } 398 399 return -EINVAL; 400 } 401 402 static int stk3310_write_raw(struct iio_dev *indio_dev, 403 struct iio_chan_spec const *chan, 404 int val, int val2, long mask) 405 { 406 int ret; 407 int index; 408 struct stk3310_data *data = iio_priv(indio_dev); 409 410 if (chan->type != IIO_LIGHT && chan->type != IIO_PROXIMITY) 411 return -EINVAL; 412 413 switch (mask) { 414 case IIO_CHAN_INFO_INT_TIME: 415 index = stk3310_get_index(stk3310_it_table, 416 ARRAY_SIZE(stk3310_it_table), 417 val, val2); 418 if (index < 0) 419 return -EINVAL; 420 mutex_lock(&data->lock); 421 if (chan->type == IIO_LIGHT) 422 ret = regmap_field_write(data->reg_als_it, index); 423 else 424 ret = regmap_field_write(data->reg_ps_it, index); 425 if (ret < 0) 426 dev_err(&data->client->dev, 427 "sensor configuration failed\n"); 428 mutex_unlock(&data->lock); 429 return ret; 430 431 case IIO_CHAN_INFO_SCALE: 432 index = stk3310_get_index(stk3310_scale_table, 433 ARRAY_SIZE(stk3310_scale_table), 434 val, val2); 435 if (index < 0) 436 return -EINVAL; 437 mutex_lock(&data->lock); 438 if (chan->type == IIO_LIGHT) 439 ret = regmap_field_write(data->reg_als_gain, index); 440 else 441 ret = regmap_field_write(data->reg_ps_gain, index); 442 if (ret < 0) 443 dev_err(&data->client->dev, 444 "sensor configuration failed\n"); 445 mutex_unlock(&data->lock); 446 return ret; 447 } 448 449 return -EINVAL; 450 } 451 452 static const struct iio_info stk3310_info = { 453 .read_raw = stk3310_read_raw, 454 .write_raw = stk3310_write_raw, 455 .attrs = &stk3310_attribute_group, 456 .read_event_value = stk3310_read_event, 457 .write_event_value = stk3310_write_event, 458 .read_event_config = stk3310_read_event_config, 459 .write_event_config = stk3310_write_event_config, 460 }; 461 462 static int stk3310_set_state(struct stk3310_data *data, u8 state) 463 { 464 int ret; 465 struct i2c_client *client = data->client; 466 467 /* 3-bit state; 0b100 is not supported. */ 468 if (state > 7 || state == 4) 469 return -EINVAL; 470 471 mutex_lock(&data->lock); 472 ret = regmap_field_write(data->reg_state, state); 473 if (ret < 0) { 474 dev_err(&client->dev, "failed to change sensor state\n"); 475 } else if (state != STK3310_STATE_STANDBY) { 476 /* Don't reset the 'enabled' flags if we're going in standby */ 477 data->ps_enabled = !!(state & STK3310_STATE_EN_PS); 478 data->als_enabled = !!(state & STK3310_STATE_EN_ALS); 479 } 480 mutex_unlock(&data->lock); 481 482 return ret; 483 } 484 485 static int stk3310_init(struct iio_dev *indio_dev) 486 { 487 int ret; 488 int chipid; 489 u8 state; 490 struct stk3310_data *data = iio_priv(indio_dev); 491 struct i2c_client *client = data->client; 492 493 ret = regmap_read(data->regmap, STK3310_REG_ID, &chipid); 494 if (ret < 0) 495 return ret; 496 497 ret = stk3310_check_chip_id(chipid); 498 if (ret < 0) 499 dev_warn(&client->dev, "unknown chip id: 0x%x\n", chipid); 500 501 state = STK3310_STATE_EN_ALS | STK3310_STATE_EN_PS; 502 ret = stk3310_set_state(data, state); 503 if (ret < 0) { 504 dev_err(&client->dev, "failed to enable sensor"); 505 return ret; 506 } 507 508 /* Enable PS interrupts */ 509 ret = regmap_field_write(data->reg_int_ps, STK3310_PSINT_EN); 510 if (ret < 0) 511 dev_err(&client->dev, "failed to enable interrupts!\n"); 512 513 return ret; 514 } 515 516 static bool stk3310_is_volatile_reg(struct device *dev, unsigned int reg) 517 { 518 switch (reg) { 519 case STK3310_REG_ALS_DATA_MSB: 520 case STK3310_REG_ALS_DATA_LSB: 521 case STK3310_REG_PS_DATA_LSB: 522 case STK3310_REG_PS_DATA_MSB: 523 case STK3310_REG_FLAG: 524 return true; 525 default: 526 return false; 527 } 528 } 529 530 static const struct regmap_config stk3310_regmap_config = { 531 .name = STK3310_REGMAP_NAME, 532 .reg_bits = 8, 533 .val_bits = 8, 534 .max_register = STK3310_MAX_REG, 535 .cache_type = REGCACHE_RBTREE, 536 .volatile_reg = stk3310_is_volatile_reg, 537 }; 538 539 static int stk3310_regmap_init(struct stk3310_data *data) 540 { 541 struct regmap *regmap; 542 struct i2c_client *client; 543 544 client = data->client; 545 regmap = devm_regmap_init_i2c(client, &stk3310_regmap_config); 546 if (IS_ERR(regmap)) { 547 dev_err(&client->dev, "regmap initialization failed.\n"); 548 return PTR_ERR(regmap); 549 } 550 data->regmap = regmap; 551 552 STK3310_REGFIELD(state); 553 STK3310_REGFIELD(als_gain); 554 STK3310_REGFIELD(ps_gain); 555 STK3310_REGFIELD(als_it); 556 STK3310_REGFIELD(ps_it); 557 STK3310_REGFIELD(int_ps); 558 STK3310_REGFIELD(flag_psint); 559 STK3310_REGFIELD(flag_nf); 560 561 return 0; 562 } 563 564 static irqreturn_t stk3310_irq_handler(int irq, void *private) 565 { 566 struct iio_dev *indio_dev = private; 567 struct stk3310_data *data = iio_priv(indio_dev); 568 569 data->timestamp = iio_get_time_ns(indio_dev); 570 571 return IRQ_WAKE_THREAD; 572 } 573 574 static irqreturn_t stk3310_irq_event_handler(int irq, void *private) 575 { 576 int ret; 577 unsigned int dir; 578 u64 event; 579 580 struct iio_dev *indio_dev = private; 581 struct stk3310_data *data = iio_priv(indio_dev); 582 583 /* Read FLAG_NF to figure out what threshold has been met. */ 584 mutex_lock(&data->lock); 585 ret = regmap_field_read(data->reg_flag_nf, &dir); 586 if (ret < 0) { 587 dev_err(&data->client->dev, "register read failed: %d\n", ret); 588 goto out; 589 } 590 event = IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 1, 591 IIO_EV_TYPE_THRESH, 592 (dir ? IIO_EV_DIR_FALLING : 593 IIO_EV_DIR_RISING)); 594 iio_push_event(indio_dev, event, data->timestamp); 595 596 /* Reset the interrupt flag */ 597 ret = regmap_field_write(data->reg_flag_psint, 0); 598 if (ret < 0) 599 dev_err(&data->client->dev, "failed to reset interrupts\n"); 600 out: 601 mutex_unlock(&data->lock); 602 603 return IRQ_HANDLED; 604 } 605 606 static int stk3310_probe(struct i2c_client *client) 607 { 608 int ret; 609 struct iio_dev *indio_dev; 610 struct stk3310_data *data; 611 612 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); 613 if (!indio_dev) { 614 dev_err(&client->dev, "iio allocation failed!\n"); 615 return -ENOMEM; 616 } 617 618 data = iio_priv(indio_dev); 619 data->client = client; 620 i2c_set_clientdata(client, indio_dev); 621 622 device_property_read_u32(&client->dev, "proximity-near-level", 623 &data->ps_near_level); 624 625 mutex_init(&data->lock); 626 627 ret = stk3310_regmap_init(data); 628 if (ret < 0) 629 return ret; 630 631 indio_dev->info = &stk3310_info; 632 indio_dev->name = STK3310_DRIVER_NAME; 633 indio_dev->modes = INDIO_DIRECT_MODE; 634 indio_dev->channels = stk3310_channels; 635 indio_dev->num_channels = ARRAY_SIZE(stk3310_channels); 636 637 ret = stk3310_init(indio_dev); 638 if (ret < 0) 639 return ret; 640 641 if (client->irq > 0) { 642 ret = devm_request_threaded_irq(&client->dev, client->irq, 643 stk3310_irq_handler, 644 stk3310_irq_event_handler, 645 IRQF_TRIGGER_FALLING | 646 IRQF_ONESHOT, 647 STK3310_EVENT, indio_dev); 648 if (ret < 0) { 649 dev_err(&client->dev, "request irq %d failed\n", 650 client->irq); 651 goto err_standby; 652 } 653 } 654 655 ret = iio_device_register(indio_dev); 656 if (ret < 0) { 657 dev_err(&client->dev, "device_register failed\n"); 658 goto err_standby; 659 } 660 661 return 0; 662 663 err_standby: 664 stk3310_set_state(data, STK3310_STATE_STANDBY); 665 return ret; 666 } 667 668 static void stk3310_remove(struct i2c_client *client) 669 { 670 struct iio_dev *indio_dev = i2c_get_clientdata(client); 671 672 iio_device_unregister(indio_dev); 673 stk3310_set_state(iio_priv(indio_dev), STK3310_STATE_STANDBY); 674 } 675 676 static int stk3310_suspend(struct device *dev) 677 { 678 struct stk3310_data *data; 679 680 data = iio_priv(i2c_get_clientdata(to_i2c_client(dev))); 681 682 return stk3310_set_state(data, STK3310_STATE_STANDBY); 683 } 684 685 static int stk3310_resume(struct device *dev) 686 { 687 u8 state = 0; 688 struct stk3310_data *data; 689 690 data = iio_priv(i2c_get_clientdata(to_i2c_client(dev))); 691 if (data->ps_enabled) 692 state |= STK3310_STATE_EN_PS; 693 if (data->als_enabled) 694 state |= STK3310_STATE_EN_ALS; 695 696 return stk3310_set_state(data, state); 697 } 698 699 static DEFINE_SIMPLE_DEV_PM_OPS(stk3310_pm_ops, stk3310_suspend, 700 stk3310_resume); 701 702 static const struct i2c_device_id stk3310_i2c_id[] = { 703 { "STK3310" }, 704 { "STK3311" }, 705 { "STK3335" }, 706 {} 707 }; 708 MODULE_DEVICE_TABLE(i2c, stk3310_i2c_id); 709 710 static const struct acpi_device_id stk3310_acpi_id[] = { 711 {"STK3310", 0}, 712 {"STK3311", 0}, 713 {} 714 }; 715 716 MODULE_DEVICE_TABLE(acpi, stk3310_acpi_id); 717 718 static const struct of_device_id stk3310_of_match[] = { 719 { .compatible = "sensortek,stk3310", }, 720 { .compatible = "sensortek,stk3311", }, 721 { .compatible = "sensortek,stk3335", }, 722 {} 723 }; 724 MODULE_DEVICE_TABLE(of, stk3310_of_match); 725 726 static struct i2c_driver stk3310_driver = { 727 .driver = { 728 .name = "stk3310", 729 .of_match_table = stk3310_of_match, 730 .pm = pm_sleep_ptr(&stk3310_pm_ops), 731 .acpi_match_table = stk3310_acpi_id, 732 }, 733 .probe = stk3310_probe, 734 .remove = stk3310_remove, 735 .id_table = stk3310_i2c_id, 736 }; 737 738 module_i2c_driver(stk3310_driver); 739 740 MODULE_AUTHOR("Tiberiu Breana <tiberiu.a.breana@intel.com>"); 741 MODULE_DESCRIPTION("STK3310 Ambient Light and Proximity Sensor driver"); 742 MODULE_LICENSE("GPL v2"); 743