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 STK3013_CHIP_ID_VAL 0x31 39 #define STK3310_CHIP_ID_VAL 0x13 40 #define STK3311_CHIP_ID_VAL 0x1D 41 #define STK3311A_CHIP_ID_VAL 0x15 42 #define STK3311S34_CHIP_ID_VAL 0x1E 43 #define STK3311X_CHIP_ID_VAL 0x12 44 #define STK3335_CHIP_ID_VAL 0x51 45 #define STK3310_PSINT_EN 0x01 46 #define STK3310_PS_MAX_VAL 0xFFFF 47 48 #define STK3310_DRIVER_NAME "stk3310" 49 #define STK3310_REGMAP_NAME "stk3310_regmap" 50 #define STK3310_EVENT "stk3310_event" 51 52 #define STK3310_SCALE_AVAILABLE "6.4 1.6 0.4 0.1" 53 54 #define STK3310_IT_AVAILABLE \ 55 "0.000185 0.000370 0.000741 0.001480 0.002960 0.005920 0.011840 " \ 56 "0.023680 0.047360 0.094720 0.189440 0.378880 0.757760 1.515520 " \ 57 "3.031040 6.062080" 58 59 #define STK3310_REGFIELD(name) \ 60 do { \ 61 data->reg_##name = \ 62 devm_regmap_field_alloc(&client->dev, regmap, \ 63 stk3310_reg_field_##name); \ 64 if (IS_ERR(data->reg_##name)) { \ 65 dev_err(&client->dev, "reg field alloc failed.\n"); \ 66 return PTR_ERR(data->reg_##name); \ 67 } \ 68 } while (0) 69 70 static const struct reg_field stk3310_reg_field_state = 71 REG_FIELD(STK3310_REG_STATE, 0, 2); 72 static const struct reg_field stk3310_reg_field_als_gain = 73 REG_FIELD(STK3310_REG_ALSCTRL, 4, 5); 74 static const struct reg_field stk3310_reg_field_ps_gain = 75 REG_FIELD(STK3310_REG_PSCTRL, 4, 5); 76 static const struct reg_field stk3310_reg_field_als_it = 77 REG_FIELD(STK3310_REG_ALSCTRL, 0, 3); 78 static const struct reg_field stk3310_reg_field_ps_it = 79 REG_FIELD(STK3310_REG_PSCTRL, 0, 3); 80 static const struct reg_field stk3310_reg_field_int_ps = 81 REG_FIELD(STK3310_REG_INT, 0, 2); 82 static const struct reg_field stk3310_reg_field_flag_psint = 83 REG_FIELD(STK3310_REG_FLAG, 4, 4); 84 static const struct reg_field stk3310_reg_field_flag_nf = 85 REG_FIELD(STK3310_REG_FLAG, 0, 0); 86 87 static const u8 stk3310_chip_ids[] = { 88 STK3013_CHIP_ID_VAL, 89 STK3310_CHIP_ID_VAL, 90 STK3311A_CHIP_ID_VAL, 91 STK3311S34_CHIP_ID_VAL, 92 STK3311X_CHIP_ID_VAL, 93 STK3311_CHIP_ID_VAL, 94 STK3335_CHIP_ID_VAL, 95 }; 96 97 /* Estimate maximum proximity values with regard to measurement scale. */ 98 static const int stk3310_ps_max[4] = { 99 STK3310_PS_MAX_VAL / 640, 100 STK3310_PS_MAX_VAL / 160, 101 STK3310_PS_MAX_VAL / 40, 102 STK3310_PS_MAX_VAL / 10 103 }; 104 105 static const int stk3310_scale_table[][2] = { 106 {6, 400000}, {1, 600000}, {0, 400000}, {0, 100000} 107 }; 108 109 /* Integration time in seconds, microseconds */ 110 static const int stk3310_it_table[][2] = { 111 {0, 185}, {0, 370}, {0, 741}, {0, 1480}, 112 {0, 2960}, {0, 5920}, {0, 11840}, {0, 23680}, 113 {0, 47360}, {0, 94720}, {0, 189440}, {0, 378880}, 114 {0, 757760}, {1, 515520}, {3, 31040}, {6, 62080}, 115 }; 116 117 struct stk3310_data { 118 struct i2c_client *client; 119 struct mutex lock; 120 bool als_enabled; 121 bool ps_enabled; 122 uint32_t ps_near_level; 123 u64 timestamp; 124 struct regmap *regmap; 125 struct regmap_field *reg_state; 126 struct regmap_field *reg_als_gain; 127 struct regmap_field *reg_ps_gain; 128 struct regmap_field *reg_als_it; 129 struct regmap_field *reg_ps_it; 130 struct regmap_field *reg_int_ps; 131 struct regmap_field *reg_flag_psint; 132 struct regmap_field *reg_flag_nf; 133 }; 134 135 static const struct iio_event_spec stk3310_events[] = { 136 /* Proximity event */ 137 { 138 .type = IIO_EV_TYPE_THRESH, 139 .dir = IIO_EV_DIR_RISING, 140 .mask_separate = BIT(IIO_EV_INFO_VALUE) | 141 BIT(IIO_EV_INFO_ENABLE), 142 }, 143 /* Out-of-proximity event */ 144 { 145 .type = IIO_EV_TYPE_THRESH, 146 .dir = IIO_EV_DIR_FALLING, 147 .mask_separate = BIT(IIO_EV_INFO_VALUE) | 148 BIT(IIO_EV_INFO_ENABLE), 149 }, 150 }; 151 152 static ssize_t stk3310_read_near_level(struct iio_dev *indio_dev, 153 uintptr_t priv, 154 const struct iio_chan_spec *chan, 155 char *buf) 156 { 157 struct stk3310_data *data = iio_priv(indio_dev); 158 159 return sprintf(buf, "%u\n", data->ps_near_level); 160 } 161 162 static const struct iio_chan_spec_ext_info stk3310_ext_info[] = { 163 { 164 .name = "nearlevel", 165 .shared = IIO_SEPARATE, 166 .read = stk3310_read_near_level, 167 }, 168 { /* sentinel */ } 169 }; 170 171 static const struct iio_chan_spec stk3310_channels[] = { 172 { 173 .type = IIO_LIGHT, 174 .info_mask_separate = 175 BIT(IIO_CHAN_INFO_RAW) | 176 BIT(IIO_CHAN_INFO_SCALE) | 177 BIT(IIO_CHAN_INFO_INT_TIME), 178 }, 179 { 180 .type = IIO_PROXIMITY, 181 .info_mask_separate = 182 BIT(IIO_CHAN_INFO_RAW) | 183 BIT(IIO_CHAN_INFO_SCALE) | 184 BIT(IIO_CHAN_INFO_INT_TIME), 185 .event_spec = stk3310_events, 186 .num_event_specs = ARRAY_SIZE(stk3310_events), 187 .ext_info = stk3310_ext_info, 188 } 189 }; 190 191 static IIO_CONST_ATTR(in_illuminance_scale_available, STK3310_SCALE_AVAILABLE); 192 193 static IIO_CONST_ATTR(in_proximity_scale_available, STK3310_SCALE_AVAILABLE); 194 195 static IIO_CONST_ATTR(in_illuminance_integration_time_available, 196 STK3310_IT_AVAILABLE); 197 198 static IIO_CONST_ATTR(in_proximity_integration_time_available, 199 STK3310_IT_AVAILABLE); 200 201 static struct attribute *stk3310_attributes[] = { 202 &iio_const_attr_in_illuminance_scale_available.dev_attr.attr, 203 &iio_const_attr_in_proximity_scale_available.dev_attr.attr, 204 &iio_const_attr_in_illuminance_integration_time_available.dev_attr.attr, 205 &iio_const_attr_in_proximity_integration_time_available.dev_attr.attr, 206 NULL, 207 }; 208 209 static const struct attribute_group stk3310_attribute_group = { 210 .attrs = stk3310_attributes 211 }; 212 213 static int stk3310_check_chip_id(const u8 chip_id) 214 { 215 for (int i = 0; i < ARRAY_SIZE(stk3310_chip_ids); i++) { 216 if (chip_id == stk3310_chip_ids[i]) 217 return 0; 218 } 219 220 return -ENODEV; 221 } 222 223 static int stk3310_get_index(const int table[][2], int table_size, 224 int val, int val2) 225 { 226 int i; 227 228 for (i = 0; i < table_size; i++) { 229 if (val == table[i][0] && val2 == table[i][1]) 230 return i; 231 } 232 233 return -EINVAL; 234 } 235 236 static int stk3310_read_event(struct iio_dev *indio_dev, 237 const struct iio_chan_spec *chan, 238 enum iio_event_type type, 239 enum iio_event_direction dir, 240 enum iio_event_info info, 241 int *val, int *val2) 242 { 243 u8 reg; 244 __be16 buf; 245 int ret; 246 struct stk3310_data *data = iio_priv(indio_dev); 247 248 if (info != IIO_EV_INFO_VALUE) 249 return -EINVAL; 250 251 /* Only proximity interrupts are implemented at the moment. */ 252 if (dir == IIO_EV_DIR_RISING) 253 reg = STK3310_REG_THDH_PS; 254 else if (dir == IIO_EV_DIR_FALLING) 255 reg = STK3310_REG_THDL_PS; 256 else 257 return -EINVAL; 258 259 mutex_lock(&data->lock); 260 ret = regmap_bulk_read(data->regmap, reg, &buf, 2); 261 mutex_unlock(&data->lock); 262 if (ret < 0) { 263 dev_err(&data->client->dev, "register read failed\n"); 264 return ret; 265 } 266 *val = be16_to_cpu(buf); 267 268 return IIO_VAL_INT; 269 } 270 271 static int stk3310_write_event(struct iio_dev *indio_dev, 272 const struct iio_chan_spec *chan, 273 enum iio_event_type type, 274 enum iio_event_direction dir, 275 enum iio_event_info info, 276 int val, int val2) 277 { 278 u8 reg; 279 __be16 buf; 280 int ret; 281 unsigned int index; 282 struct stk3310_data *data = iio_priv(indio_dev); 283 struct i2c_client *client = data->client; 284 285 ret = regmap_field_read(data->reg_ps_gain, &index); 286 if (ret < 0) 287 return ret; 288 289 if (val < 0 || val > stk3310_ps_max[index]) 290 return -EINVAL; 291 292 if (dir == IIO_EV_DIR_RISING) 293 reg = STK3310_REG_THDH_PS; 294 else if (dir == IIO_EV_DIR_FALLING) 295 reg = STK3310_REG_THDL_PS; 296 else 297 return -EINVAL; 298 299 buf = cpu_to_be16(val); 300 ret = regmap_bulk_write(data->regmap, reg, &buf, 2); 301 if (ret < 0) 302 dev_err(&client->dev, "failed to set PS threshold!\n"); 303 304 return ret; 305 } 306 307 static int stk3310_read_event_config(struct iio_dev *indio_dev, 308 const struct iio_chan_spec *chan, 309 enum iio_event_type type, 310 enum iio_event_direction dir) 311 { 312 unsigned int event_val; 313 int ret; 314 struct stk3310_data *data = iio_priv(indio_dev); 315 316 ret = regmap_field_read(data->reg_int_ps, &event_val); 317 if (ret < 0) 318 return ret; 319 320 return event_val; 321 } 322 323 static int stk3310_write_event_config(struct iio_dev *indio_dev, 324 const struct iio_chan_spec *chan, 325 enum iio_event_type type, 326 enum iio_event_direction dir, 327 int state) 328 { 329 int ret; 330 struct stk3310_data *data = iio_priv(indio_dev); 331 struct i2c_client *client = data->client; 332 333 if (state < 0 || state > 7) 334 return -EINVAL; 335 336 /* Set INT_PS value */ 337 mutex_lock(&data->lock); 338 ret = regmap_field_write(data->reg_int_ps, state); 339 if (ret < 0) 340 dev_err(&client->dev, "failed to set interrupt mode\n"); 341 mutex_unlock(&data->lock); 342 343 return ret; 344 } 345 346 static int stk3310_read_raw(struct iio_dev *indio_dev, 347 struct iio_chan_spec const *chan, 348 int *val, int *val2, long mask) 349 { 350 u8 reg; 351 __be16 buf; 352 int ret; 353 unsigned int index; 354 struct stk3310_data *data = iio_priv(indio_dev); 355 struct i2c_client *client = data->client; 356 357 if (chan->type != IIO_LIGHT && chan->type != IIO_PROXIMITY) 358 return -EINVAL; 359 360 switch (mask) { 361 case IIO_CHAN_INFO_RAW: 362 if (chan->type == IIO_LIGHT) 363 reg = STK3310_REG_ALS_DATA_MSB; 364 else 365 reg = STK3310_REG_PS_DATA_MSB; 366 367 mutex_lock(&data->lock); 368 ret = regmap_bulk_read(data->regmap, reg, &buf, 2); 369 if (ret < 0) { 370 dev_err(&client->dev, "register read failed\n"); 371 mutex_unlock(&data->lock); 372 return ret; 373 } 374 *val = be16_to_cpu(buf); 375 mutex_unlock(&data->lock); 376 return IIO_VAL_INT; 377 case IIO_CHAN_INFO_INT_TIME: 378 if (chan->type == IIO_LIGHT) 379 ret = regmap_field_read(data->reg_als_it, &index); 380 else 381 ret = regmap_field_read(data->reg_ps_it, &index); 382 if (ret < 0) 383 return ret; 384 385 *val = stk3310_it_table[index][0]; 386 *val2 = stk3310_it_table[index][1]; 387 return IIO_VAL_INT_PLUS_MICRO; 388 case IIO_CHAN_INFO_SCALE: 389 if (chan->type == IIO_LIGHT) 390 ret = regmap_field_read(data->reg_als_gain, &index); 391 else 392 ret = regmap_field_read(data->reg_ps_gain, &index); 393 if (ret < 0) 394 return ret; 395 396 *val = stk3310_scale_table[index][0]; 397 *val2 = stk3310_scale_table[index][1]; 398 return IIO_VAL_INT_PLUS_MICRO; 399 } 400 401 return -EINVAL; 402 } 403 404 static int stk3310_write_raw(struct iio_dev *indio_dev, 405 struct iio_chan_spec const *chan, 406 int val, int val2, long mask) 407 { 408 int ret; 409 int index; 410 struct stk3310_data *data = iio_priv(indio_dev); 411 412 if (chan->type != IIO_LIGHT && chan->type != IIO_PROXIMITY) 413 return -EINVAL; 414 415 switch (mask) { 416 case IIO_CHAN_INFO_INT_TIME: 417 index = stk3310_get_index(stk3310_it_table, 418 ARRAY_SIZE(stk3310_it_table), 419 val, val2); 420 if (index < 0) 421 return -EINVAL; 422 mutex_lock(&data->lock); 423 if (chan->type == IIO_LIGHT) 424 ret = regmap_field_write(data->reg_als_it, index); 425 else 426 ret = regmap_field_write(data->reg_ps_it, index); 427 if (ret < 0) 428 dev_err(&data->client->dev, 429 "sensor configuration failed\n"); 430 mutex_unlock(&data->lock); 431 return ret; 432 433 case IIO_CHAN_INFO_SCALE: 434 index = stk3310_get_index(stk3310_scale_table, 435 ARRAY_SIZE(stk3310_scale_table), 436 val, val2); 437 if (index < 0) 438 return -EINVAL; 439 mutex_lock(&data->lock); 440 if (chan->type == IIO_LIGHT) 441 ret = regmap_field_write(data->reg_als_gain, index); 442 else 443 ret = regmap_field_write(data->reg_ps_gain, index); 444 if (ret < 0) 445 dev_err(&data->client->dev, 446 "sensor configuration failed\n"); 447 mutex_unlock(&data->lock); 448 return ret; 449 } 450 451 return -EINVAL; 452 } 453 454 static const struct iio_info stk3310_info = { 455 .read_raw = stk3310_read_raw, 456 .write_raw = stk3310_write_raw, 457 .attrs = &stk3310_attribute_group, 458 .read_event_value = stk3310_read_event, 459 .write_event_value = stk3310_write_event, 460 .read_event_config = stk3310_read_event_config, 461 .write_event_config = stk3310_write_event_config, 462 }; 463 464 static int stk3310_set_state(struct stk3310_data *data, u8 state) 465 { 466 int ret; 467 struct i2c_client *client = data->client; 468 469 /* 3-bit state; 0b100 is not supported. */ 470 if (state > 7 || state == 4) 471 return -EINVAL; 472 473 mutex_lock(&data->lock); 474 ret = regmap_field_write(data->reg_state, state); 475 if (ret < 0) { 476 dev_err(&client->dev, "failed to change sensor state\n"); 477 } else if (state != STK3310_STATE_STANDBY) { 478 /* Don't reset the 'enabled' flags if we're going in standby */ 479 data->ps_enabled = !!(state & STK3310_STATE_EN_PS); 480 data->als_enabled = !!(state & STK3310_STATE_EN_ALS); 481 } 482 mutex_unlock(&data->lock); 483 484 return ret; 485 } 486 487 static int stk3310_init(struct iio_dev *indio_dev) 488 { 489 int ret; 490 int chipid; 491 u8 state; 492 struct stk3310_data *data = iio_priv(indio_dev); 493 struct i2c_client *client = data->client; 494 495 ret = regmap_read(data->regmap, STK3310_REG_ID, &chipid); 496 if (ret < 0) 497 return ret; 498 499 ret = stk3310_check_chip_id(chipid); 500 if (ret < 0) 501 dev_info(&client->dev, "new unknown chip id: 0x%x\n", chipid); 502 503 state = STK3310_STATE_EN_ALS | STK3310_STATE_EN_PS; 504 ret = stk3310_set_state(data, state); 505 if (ret < 0) { 506 dev_err(&client->dev, "failed to enable sensor"); 507 return ret; 508 } 509 510 /* Enable PS interrupts */ 511 ret = regmap_field_write(data->reg_int_ps, STK3310_PSINT_EN); 512 if (ret < 0) 513 dev_err(&client->dev, "failed to enable interrupts!\n"); 514 515 return ret; 516 } 517 518 static bool stk3310_is_volatile_reg(struct device *dev, unsigned int reg) 519 { 520 switch (reg) { 521 case STK3310_REG_ALS_DATA_MSB: 522 case STK3310_REG_ALS_DATA_LSB: 523 case STK3310_REG_PS_DATA_LSB: 524 case STK3310_REG_PS_DATA_MSB: 525 case STK3310_REG_FLAG: 526 return true; 527 default: 528 return false; 529 } 530 } 531 532 static const struct regmap_config stk3310_regmap_config = { 533 .name = STK3310_REGMAP_NAME, 534 .reg_bits = 8, 535 .val_bits = 8, 536 .max_register = STK3310_MAX_REG, 537 .cache_type = REGCACHE_RBTREE, 538 .volatile_reg = stk3310_is_volatile_reg, 539 }; 540 541 static int stk3310_regmap_init(struct stk3310_data *data) 542 { 543 struct regmap *regmap; 544 struct i2c_client *client; 545 546 client = data->client; 547 regmap = devm_regmap_init_i2c(client, &stk3310_regmap_config); 548 if (IS_ERR(regmap)) { 549 dev_err(&client->dev, "regmap initialization failed.\n"); 550 return PTR_ERR(regmap); 551 } 552 data->regmap = regmap; 553 554 STK3310_REGFIELD(state); 555 STK3310_REGFIELD(als_gain); 556 STK3310_REGFIELD(ps_gain); 557 STK3310_REGFIELD(als_it); 558 STK3310_REGFIELD(ps_it); 559 STK3310_REGFIELD(int_ps); 560 STK3310_REGFIELD(flag_psint); 561 STK3310_REGFIELD(flag_nf); 562 563 return 0; 564 } 565 566 static irqreturn_t stk3310_irq_handler(int irq, void *private) 567 { 568 struct iio_dev *indio_dev = private; 569 struct stk3310_data *data = iio_priv(indio_dev); 570 571 data->timestamp = iio_get_time_ns(indio_dev); 572 573 return IRQ_WAKE_THREAD; 574 } 575 576 static irqreturn_t stk3310_irq_event_handler(int irq, void *private) 577 { 578 int ret; 579 unsigned int dir; 580 u64 event; 581 582 struct iio_dev *indio_dev = private; 583 struct stk3310_data *data = iio_priv(indio_dev); 584 585 /* Read FLAG_NF to figure out what threshold has been met. */ 586 mutex_lock(&data->lock); 587 ret = regmap_field_read(data->reg_flag_nf, &dir); 588 if (ret < 0) { 589 dev_err(&data->client->dev, "register read failed: %d\n", ret); 590 goto out; 591 } 592 event = IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 1, 593 IIO_EV_TYPE_THRESH, 594 (dir ? IIO_EV_DIR_FALLING : 595 IIO_EV_DIR_RISING)); 596 iio_push_event(indio_dev, event, data->timestamp); 597 598 /* Reset the interrupt flag */ 599 ret = regmap_field_write(data->reg_flag_psint, 0); 600 if (ret < 0) 601 dev_err(&data->client->dev, "failed to reset interrupts\n"); 602 out: 603 mutex_unlock(&data->lock); 604 605 return IRQ_HANDLED; 606 } 607 608 static int stk3310_probe(struct i2c_client *client) 609 { 610 int ret; 611 struct iio_dev *indio_dev; 612 struct stk3310_data *data; 613 614 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); 615 if (!indio_dev) { 616 dev_err(&client->dev, "iio allocation failed!\n"); 617 return -ENOMEM; 618 } 619 620 data = iio_priv(indio_dev); 621 data->client = client; 622 i2c_set_clientdata(client, indio_dev); 623 624 device_property_read_u32(&client->dev, "proximity-near-level", 625 &data->ps_near_level); 626 627 mutex_init(&data->lock); 628 629 ret = stk3310_regmap_init(data); 630 if (ret < 0) 631 return ret; 632 633 indio_dev->info = &stk3310_info; 634 indio_dev->name = STK3310_DRIVER_NAME; 635 indio_dev->modes = INDIO_DIRECT_MODE; 636 indio_dev->channels = stk3310_channels; 637 indio_dev->num_channels = ARRAY_SIZE(stk3310_channels); 638 639 ret = stk3310_init(indio_dev); 640 if (ret < 0) 641 return ret; 642 643 if (client->irq > 0) { 644 ret = devm_request_threaded_irq(&client->dev, client->irq, 645 stk3310_irq_handler, 646 stk3310_irq_event_handler, 647 IRQF_TRIGGER_FALLING | 648 IRQF_ONESHOT, 649 STK3310_EVENT, indio_dev); 650 if (ret < 0) { 651 dev_err(&client->dev, "request irq %d failed\n", 652 client->irq); 653 goto err_standby; 654 } 655 } 656 657 ret = iio_device_register(indio_dev); 658 if (ret < 0) { 659 dev_err(&client->dev, "device_register failed\n"); 660 goto err_standby; 661 } 662 663 return 0; 664 665 err_standby: 666 stk3310_set_state(data, STK3310_STATE_STANDBY); 667 return ret; 668 } 669 670 static void stk3310_remove(struct i2c_client *client) 671 { 672 struct iio_dev *indio_dev = i2c_get_clientdata(client); 673 674 iio_device_unregister(indio_dev); 675 stk3310_set_state(iio_priv(indio_dev), STK3310_STATE_STANDBY); 676 } 677 678 static int stk3310_suspend(struct device *dev) 679 { 680 struct stk3310_data *data; 681 682 data = iio_priv(i2c_get_clientdata(to_i2c_client(dev))); 683 684 return stk3310_set_state(data, STK3310_STATE_STANDBY); 685 } 686 687 static int stk3310_resume(struct device *dev) 688 { 689 u8 state = 0; 690 struct stk3310_data *data; 691 692 data = iio_priv(i2c_get_clientdata(to_i2c_client(dev))); 693 if (data->ps_enabled) 694 state |= STK3310_STATE_EN_PS; 695 if (data->als_enabled) 696 state |= STK3310_STATE_EN_ALS; 697 698 return stk3310_set_state(data, state); 699 } 700 701 static DEFINE_SIMPLE_DEV_PM_OPS(stk3310_pm_ops, stk3310_suspend, 702 stk3310_resume); 703 704 static const struct i2c_device_id stk3310_i2c_id[] = { 705 { "STK3013" }, 706 { "STK3310" }, 707 { "STK3311" }, 708 { "STK3335" }, 709 {} 710 }; 711 MODULE_DEVICE_TABLE(i2c, stk3310_i2c_id); 712 713 static const struct acpi_device_id stk3310_acpi_id[] = { 714 {"STK3013", 0}, 715 {"STK3310", 0}, 716 {"STK3311", 0}, 717 {} 718 }; 719 720 MODULE_DEVICE_TABLE(acpi, stk3310_acpi_id); 721 722 static const struct of_device_id stk3310_of_match[] = { 723 { .compatible = "sensortek,stk3013", }, 724 { .compatible = "sensortek,stk3310", }, 725 { .compatible = "sensortek,stk3311", }, 726 { .compatible = "sensortek,stk3335", }, 727 {} 728 }; 729 MODULE_DEVICE_TABLE(of, stk3310_of_match); 730 731 static struct i2c_driver stk3310_driver = { 732 .driver = { 733 .name = "stk3310", 734 .of_match_table = stk3310_of_match, 735 .pm = pm_sleep_ptr(&stk3310_pm_ops), 736 .acpi_match_table = stk3310_acpi_id, 737 }, 738 .probe = stk3310_probe, 739 .remove = stk3310_remove, 740 .id_table = stk3310_i2c_id, 741 }; 742 743 module_i2c_driver(stk3310_driver); 744 745 MODULE_AUTHOR("Tiberiu Breana <tiberiu.a.breana@intel.com>"); 746 MODULE_DESCRIPTION("STK3310 Ambient Light and Proximity Sensor driver"); 747 MODULE_LICENSE("GPL v2"); 748