1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Device driver for monitoring ambient light intensity in (lux) and proximity 4 * detection (prox) within the TAOS TSL2571, TSL2671, TMD2671, TSL2771, TMD2771, 5 * TSL2572, TSL2672, TMD2672, TSL2772, and TMD2772 devices. 6 * 7 * Copyright (c) 2012, TAOS Corporation. 8 * Copyright (c) 2017-2018 Brian Masney <masneyb@onstation.org> 9 */ 10 11 #include <linux/delay.h> 12 #include <linux/errno.h> 13 #include <linux/i2c.h> 14 #include <linux/interrupt.h> 15 #include <linux/kernel.h> 16 #include <linux/module.h> 17 #include <linux/mutex.h> 18 #include <linux/slab.h> 19 #include <linux/iio/events.h> 20 #include <linux/iio/iio.h> 21 #include <linux/iio/sysfs.h> 22 #include <linux/platform_data/tsl2772.h> 23 #include <linux/regulator/consumer.h> 24 25 /* Cal defs */ 26 #define PROX_STAT_CAL 0 27 #define PROX_STAT_SAMP 1 28 #define MAX_SAMPLES_CAL 200 29 30 /* TSL2772 Device ID */ 31 #define TRITON_ID 0x00 32 #define SWORDFISH_ID 0x30 33 #define HALIBUT_ID 0x20 34 35 /* Lux calculation constants */ 36 #define TSL2772_LUX_CALC_OVER_FLOW 65535 37 38 /* 39 * TAOS Register definitions - Note: depending on device, some of these register 40 * are not used and the register address is benign. 41 */ 42 43 /* Register offsets */ 44 #define TSL2772_MAX_CONFIG_REG 16 45 46 /* Device Registers and Masks */ 47 #define TSL2772_CNTRL 0x00 48 #define TSL2772_ALS_TIME 0X01 49 #define TSL2772_PRX_TIME 0x02 50 #define TSL2772_WAIT_TIME 0x03 51 #define TSL2772_ALS_MINTHRESHLO 0X04 52 #define TSL2772_ALS_MINTHRESHHI 0X05 53 #define TSL2772_ALS_MAXTHRESHLO 0X06 54 #define TSL2772_ALS_MAXTHRESHHI 0X07 55 #define TSL2772_PRX_MINTHRESHLO 0X08 56 #define TSL2772_PRX_MINTHRESHHI 0X09 57 #define TSL2772_PRX_MAXTHRESHLO 0X0A 58 #define TSL2772_PRX_MAXTHRESHHI 0X0B 59 #define TSL2772_PERSISTENCE 0x0C 60 #define TSL2772_ALS_PRX_CONFIG 0x0D 61 #define TSL2772_PRX_COUNT 0x0E 62 #define TSL2772_GAIN 0x0F 63 #define TSL2772_NOTUSED 0x10 64 #define TSL2772_REVID 0x11 65 #define TSL2772_CHIPID 0x12 66 #define TSL2772_STATUS 0x13 67 #define TSL2772_ALS_CHAN0LO 0x14 68 #define TSL2772_ALS_CHAN0HI 0x15 69 #define TSL2772_ALS_CHAN1LO 0x16 70 #define TSL2772_ALS_CHAN1HI 0x17 71 #define TSL2772_PRX_LO 0x18 72 #define TSL2772_PRX_HI 0x19 73 74 /* tsl2772 cmd reg masks */ 75 #define TSL2772_CMD_REG 0x80 76 #define TSL2772_CMD_SPL_FN 0x60 77 #define TSL2772_CMD_REPEAT_PROTO 0x00 78 #define TSL2772_CMD_AUTOINC_PROTO 0x20 79 80 #define TSL2772_CMD_PROX_INT_CLR 0X05 81 #define TSL2772_CMD_ALS_INT_CLR 0x06 82 #define TSL2772_CMD_PROXALS_INT_CLR 0X07 83 84 /* tsl2772 cntrl reg masks */ 85 #define TSL2772_CNTL_ADC_ENBL 0x02 86 #define TSL2772_CNTL_PWR_ON 0x01 87 88 /* tsl2772 status reg masks */ 89 #define TSL2772_STA_ADC_VALID 0x01 90 #define TSL2772_STA_PRX_VALID 0x02 91 #define TSL2772_STA_ADC_PRX_VALID (TSL2772_STA_ADC_VALID | \ 92 TSL2772_STA_PRX_VALID) 93 #define TSL2772_STA_ALS_INTR 0x10 94 #define TSL2772_STA_PRX_INTR 0x20 95 96 /* tsl2772 cntrl reg masks */ 97 #define TSL2772_CNTL_REG_CLEAR 0x00 98 #define TSL2772_CNTL_PROX_INT_ENBL 0X20 99 #define TSL2772_CNTL_ALS_INT_ENBL 0X10 100 #define TSL2772_CNTL_WAIT_TMR_ENBL 0X08 101 #define TSL2772_CNTL_PROX_DET_ENBL 0X04 102 #define TSL2772_CNTL_PWRON 0x01 103 #define TSL2772_CNTL_ALSPON_ENBL 0x03 104 #define TSL2772_CNTL_INTALSPON_ENBL 0x13 105 #define TSL2772_CNTL_PROXPON_ENBL 0x0F 106 #define TSL2772_CNTL_INTPROXPON_ENBL 0x2F 107 108 #define TSL2772_ALS_GAIN_TRIM_MIN 250 109 #define TSL2772_ALS_GAIN_TRIM_MAX 4000 110 111 #define TSL2772_MAX_PROX_LEDS 2 112 113 #define TSL2772_BOOT_MIN_SLEEP_TIME 10000 114 #define TSL2772_BOOT_MAX_SLEEP_TIME 28000 115 116 /* Device family members */ 117 enum { 118 tsl2571, 119 tsl2671, 120 tmd2671, 121 tsl2771, 122 tmd2771, 123 tsl2572, 124 tsl2672, 125 tmd2672, 126 tsl2772, 127 tmd2772, 128 apds9930, 129 }; 130 131 enum { 132 TSL2772_CHIP_UNKNOWN = 0, 133 TSL2772_CHIP_WORKING = 1, 134 TSL2772_CHIP_SUSPENDED = 2 135 }; 136 137 enum { 138 TSL2772_SUPPLY_VDD = 0, 139 TSL2772_SUPPLY_VDDIO = 1, 140 TSL2772_NUM_SUPPLIES = 2 141 }; 142 143 /* Per-device data */ 144 struct tsl2772_als_info { 145 u16 als_ch0; 146 u16 als_ch1; 147 u16 lux; 148 }; 149 150 struct tsl2772_chip_info { 151 int chan_table_elements; 152 struct iio_chan_spec channel_with_events[4]; 153 struct iio_chan_spec channel_without_events[4]; 154 const struct iio_info *info; 155 }; 156 157 static const int tsl2772_led_currents[][2] = { 158 { 100000, TSL2772_100_mA }, 159 { 50000, TSL2772_50_mA }, 160 { 25000, TSL2772_25_mA }, 161 { 13000, TSL2772_13_mA }, 162 { 0, 0 } 163 }; 164 165 struct tsl2772_chip { 166 kernel_ulong_t id; 167 struct mutex prox_mutex; 168 struct mutex als_mutex; 169 struct i2c_client *client; 170 struct regulator_bulk_data supplies[TSL2772_NUM_SUPPLIES]; 171 u16 prox_data; 172 struct tsl2772_als_info als_cur_info; 173 struct tsl2772_settings settings; 174 struct tsl2772_platform_data *pdata; 175 int als_gain_time_scale; 176 int als_saturation; 177 int tsl2772_chip_status; 178 u8 tsl2772_config[TSL2772_MAX_CONFIG_REG]; 179 const struct tsl2772_chip_info *chip_info; 180 const struct iio_info *info; 181 s64 event_timestamp; 182 /* 183 * This structure is intentionally large to accommodate 184 * updates via sysfs. 185 * Sized to 9 = max 8 segments + 1 termination segment 186 */ 187 struct tsl2772_lux tsl2772_device_lux[TSL2772_MAX_LUX_TABLE_SIZE]; 188 }; 189 190 /* 191 * Different devices require different coefficents, and these numbers were 192 * derived from the 'Lux Equation' section of the various device datasheets. 193 * All of these coefficients assume a Glass Attenuation (GA) factor of 1. 194 * The coefficients are multiplied by 1000 to avoid floating point operations. 195 * The two rows in each table correspond to the Lux1 and Lux2 equations from 196 * the datasheets. 197 */ 198 static const struct tsl2772_lux tsl2x71_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = { 199 { 53000, 106000 }, 200 { 31800, 53000 }, 201 { 0, 0 }, 202 }; 203 204 static const struct tsl2772_lux tmd2x71_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = { 205 { 24000, 48000 }, 206 { 14400, 24000 }, 207 { 0, 0 }, 208 }; 209 210 static const struct tsl2772_lux tsl2x72_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = { 211 { 60000, 112200 }, 212 { 37800, 60000 }, 213 { 0, 0 }, 214 }; 215 216 static const struct tsl2772_lux tmd2x72_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = { 217 { 20000, 35000 }, 218 { 12600, 20000 }, 219 { 0, 0 }, 220 }; 221 222 static const struct tsl2772_lux apds9930_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = { 223 { 52000, 96824 }, 224 { 38792, 67132 }, 225 { 0, 0 }, 226 }; 227 228 static const struct tsl2772_lux *tsl2772_default_lux_table_group[] = { 229 [tsl2571] = tsl2x71_lux_table, 230 [tsl2671] = tsl2x71_lux_table, 231 [tmd2671] = tmd2x71_lux_table, 232 [tsl2771] = tsl2x71_lux_table, 233 [tmd2771] = tmd2x71_lux_table, 234 [tsl2572] = tsl2x72_lux_table, 235 [tsl2672] = tsl2x72_lux_table, 236 [tmd2672] = tmd2x72_lux_table, 237 [tsl2772] = tsl2x72_lux_table, 238 [tmd2772] = tmd2x72_lux_table, 239 [apds9930] = apds9930_lux_table, 240 }; 241 242 static const struct tsl2772_settings tsl2772_default_settings = { 243 .als_time = 255, /* 2.72 / 2.73 ms */ 244 .als_gain = 0, 245 .prox_time = 255, /* 2.72 / 2.73 ms */ 246 .prox_gain = 0, 247 .wait_time = 255, 248 .als_prox_config = 0, 249 .als_gain_trim = 1000, 250 .als_cal_target = 150, 251 .als_persistence = 1, 252 .als_interrupt_en = false, 253 .als_thresh_low = 200, 254 .als_thresh_high = 256, 255 .prox_persistence = 1, 256 .prox_interrupt_en = false, 257 .prox_thres_low = 0, 258 .prox_thres_high = 512, 259 .prox_max_samples_cal = 30, 260 .prox_pulse_count = 8, 261 .prox_diode = TSL2772_DIODE1, 262 .prox_power = TSL2772_100_mA 263 }; 264 265 static const s16 tsl2772_als_gain[] = { 266 1, 267 8, 268 16, 269 120 270 }; 271 272 static const s16 tsl2772_prox_gain[] = { 273 1, 274 2, 275 4, 276 8 277 }; 278 279 static const int tsl2772_int_time_avail[][6] = { 280 [tsl2571] = { 0, 2720, 0, 2720, 0, 696000 }, 281 [tsl2671] = { 0, 2720, 0, 2720, 0, 696000 }, 282 [tmd2671] = { 0, 2720, 0, 2720, 0, 696000 }, 283 [tsl2771] = { 0, 2720, 0, 2720, 0, 696000 }, 284 [tmd2771] = { 0, 2720, 0, 2720, 0, 696000 }, 285 [tsl2572] = { 0, 2730, 0, 2730, 0, 699000 }, 286 [tsl2672] = { 0, 2730, 0, 2730, 0, 699000 }, 287 [tmd2672] = { 0, 2730, 0, 2730, 0, 699000 }, 288 [tsl2772] = { 0, 2730, 0, 2730, 0, 699000 }, 289 [tmd2772] = { 0, 2730, 0, 2730, 0, 699000 }, 290 [apds9930] = { 0, 2730, 0, 2730, 0, 699000 }, 291 }; 292 293 static int tsl2772_int_calibscale_avail[] = { 1, 8, 16, 120 }; 294 295 static int tsl2772_prox_calibscale_avail[] = { 1, 2, 4, 8 }; 296 297 /* Channel variations */ 298 enum { 299 ALS, 300 PRX, 301 ALSPRX, 302 PRX2, 303 ALSPRX2, 304 }; 305 306 static const u8 device_channel_config[] = { 307 [tsl2571] = ALS, 308 [tsl2671] = PRX, 309 [tmd2671] = PRX, 310 [tsl2771] = ALSPRX, 311 [tmd2771] = ALSPRX, 312 [tsl2572] = ALS, 313 [tsl2672] = PRX2, 314 [tmd2672] = PRX2, 315 [tsl2772] = ALSPRX2, 316 [tmd2772] = ALSPRX2, 317 [apds9930] = ALSPRX2, 318 }; 319 320 static int tsl2772_read_status(struct tsl2772_chip *chip) 321 { 322 int ret; 323 324 ret = i2c_smbus_read_byte_data(chip->client, 325 TSL2772_CMD_REG | TSL2772_STATUS); 326 if (ret < 0) 327 dev_err(&chip->client->dev, 328 "%s: failed to read STATUS register: %d\n", __func__, 329 ret); 330 331 return ret; 332 } 333 334 static int tsl2772_write_control_reg(struct tsl2772_chip *chip, u8 data) 335 { 336 int ret; 337 338 ret = i2c_smbus_write_byte_data(chip->client, 339 TSL2772_CMD_REG | TSL2772_CNTRL, data); 340 if (ret < 0) { 341 dev_err(&chip->client->dev, 342 "%s: failed to write to control register %x: %d\n", 343 __func__, data, ret); 344 } 345 346 return ret; 347 } 348 349 static int tsl2772_read_autoinc_regs(struct tsl2772_chip *chip, int lower_reg, 350 int upper_reg) 351 { 352 u8 buf[2]; 353 int ret; 354 355 ret = i2c_smbus_write_byte(chip->client, 356 TSL2772_CMD_REG | TSL2772_CMD_AUTOINC_PROTO | 357 lower_reg); 358 if (ret < 0) { 359 dev_err(&chip->client->dev, 360 "%s: failed to enable auto increment protocol: %d\n", 361 __func__, ret); 362 return ret; 363 } 364 365 ret = i2c_smbus_read_byte_data(chip->client, 366 TSL2772_CMD_REG | lower_reg); 367 if (ret < 0) { 368 dev_err(&chip->client->dev, 369 "%s: failed to read from register %x: %d\n", __func__, 370 lower_reg, ret); 371 return ret; 372 } 373 buf[0] = ret; 374 375 ret = i2c_smbus_read_byte_data(chip->client, 376 TSL2772_CMD_REG | upper_reg); 377 if (ret < 0) { 378 dev_err(&chip->client->dev, 379 "%s: failed to read from register %x: %d\n", __func__, 380 upper_reg, ret); 381 return ret; 382 } 383 buf[1] = ret; 384 385 ret = i2c_smbus_write_byte(chip->client, 386 TSL2772_CMD_REG | TSL2772_CMD_REPEAT_PROTO | 387 lower_reg); 388 if (ret < 0) { 389 dev_err(&chip->client->dev, 390 "%s: failed to enable repeated byte protocol: %d\n", 391 __func__, ret); 392 return ret; 393 } 394 395 return le16_to_cpup((const __le16 *)&buf[0]); 396 } 397 398 /** 399 * tsl2772_get_lux() - Reads and calculates current lux value. 400 * @indio_dev: pointer to IIO device 401 * 402 * The raw ch0 and ch1 values of the ambient light sensed in the last 403 * integration cycle are read from the device. The raw values are multiplied 404 * by a device-specific scale factor, and divided by the integration time and 405 * device gain. The code supports multiple lux equations through the lux table 406 * coefficients. A lux gain trim is applied to each lux equation, and then the 407 * maximum lux within the interval 0..65535 is selected. 408 */ 409 static int tsl2772_get_lux(struct iio_dev *indio_dev) 410 { 411 struct tsl2772_chip *chip = iio_priv(indio_dev); 412 struct tsl2772_lux *p; 413 int max_lux, ret; 414 bool overflow; 415 416 mutex_lock(&chip->als_mutex); 417 418 if (chip->tsl2772_chip_status != TSL2772_CHIP_WORKING) { 419 dev_err(&chip->client->dev, "%s: device is not enabled\n", 420 __func__); 421 ret = -EBUSY; 422 goto out_unlock; 423 } 424 425 ret = tsl2772_read_status(chip); 426 if (ret < 0) 427 goto out_unlock; 428 429 if (!(ret & TSL2772_STA_ADC_VALID)) { 430 dev_err(&chip->client->dev, 431 "%s: data not valid yet\n", __func__); 432 ret = chip->als_cur_info.lux; /* return LAST VALUE */ 433 goto out_unlock; 434 } 435 436 ret = tsl2772_read_autoinc_regs(chip, TSL2772_ALS_CHAN0LO, 437 TSL2772_ALS_CHAN0HI); 438 if (ret < 0) 439 goto out_unlock; 440 chip->als_cur_info.als_ch0 = ret; 441 442 ret = tsl2772_read_autoinc_regs(chip, TSL2772_ALS_CHAN1LO, 443 TSL2772_ALS_CHAN1HI); 444 if (ret < 0) 445 goto out_unlock; 446 chip->als_cur_info.als_ch1 = ret; 447 448 if (chip->als_cur_info.als_ch0 >= chip->als_saturation) { 449 max_lux = TSL2772_LUX_CALC_OVER_FLOW; 450 goto update_struct_with_max_lux; 451 } 452 453 if (!chip->als_cur_info.als_ch0) { 454 /* have no data, so return LAST VALUE */ 455 ret = chip->als_cur_info.lux; 456 goto out_unlock; 457 } 458 459 max_lux = 0; 460 overflow = false; 461 for (p = (struct tsl2772_lux *)chip->tsl2772_device_lux; p->ch0 != 0; 462 p++) { 463 int lux; 464 465 lux = ((chip->als_cur_info.als_ch0 * p->ch0) - 466 (chip->als_cur_info.als_ch1 * p->ch1)) / 467 chip->als_gain_time_scale; 468 469 /* 470 * The als_gain_trim can have a value within the range 250..4000 471 * and is a multiplier for the lux. A trim of 1000 makes no 472 * changes to the lux, less than 1000 scales it down, and 473 * greater than 1000 scales it up. 474 */ 475 lux = (lux * chip->settings.als_gain_trim) / 1000; 476 477 if (lux > TSL2772_LUX_CALC_OVER_FLOW) { 478 overflow = true; 479 continue; 480 } 481 482 max_lux = max(max_lux, lux); 483 } 484 485 if (overflow && max_lux == 0) 486 max_lux = TSL2772_LUX_CALC_OVER_FLOW; 487 488 update_struct_with_max_lux: 489 chip->als_cur_info.lux = max_lux; 490 ret = max_lux; 491 492 out_unlock: 493 mutex_unlock(&chip->als_mutex); 494 495 return ret; 496 } 497 498 /** 499 * tsl2772_get_prox() - Reads proximity data registers and updates 500 * chip->prox_data. 501 * 502 * @indio_dev: pointer to IIO device 503 */ 504 static int tsl2772_get_prox(struct iio_dev *indio_dev) 505 { 506 struct tsl2772_chip *chip = iio_priv(indio_dev); 507 int ret; 508 509 mutex_lock(&chip->prox_mutex); 510 511 ret = tsl2772_read_status(chip); 512 if (ret < 0) 513 goto prox_poll_err; 514 515 switch (chip->id) { 516 case tsl2571: 517 case tsl2671: 518 case tmd2671: 519 case tsl2771: 520 case tmd2771: 521 if (!(ret & TSL2772_STA_ADC_VALID)) { 522 ret = -EINVAL; 523 goto prox_poll_err; 524 } 525 break; 526 case tsl2572: 527 case tsl2672: 528 case tmd2672: 529 case tsl2772: 530 case tmd2772: 531 case apds9930: 532 if (!(ret & TSL2772_STA_PRX_VALID)) { 533 ret = -EINVAL; 534 goto prox_poll_err; 535 } 536 break; 537 } 538 539 ret = tsl2772_read_autoinc_regs(chip, TSL2772_PRX_LO, TSL2772_PRX_HI); 540 if (ret < 0) 541 goto prox_poll_err; 542 chip->prox_data = ret; 543 544 prox_poll_err: 545 mutex_unlock(&chip->prox_mutex); 546 547 return ret; 548 } 549 550 static int tsl2772_read_prox_led_current(struct tsl2772_chip *chip) 551 { 552 struct device_node *of_node = chip->client->dev.of_node; 553 int ret, tmp, i; 554 555 ret = of_property_read_u32(of_node, "led-max-microamp", &tmp); 556 if (ret < 0) 557 return ret; 558 559 for (i = 0; tsl2772_led_currents[i][0] != 0; i++) { 560 if (tmp == tsl2772_led_currents[i][0]) { 561 chip->settings.prox_power = tsl2772_led_currents[i][1]; 562 return 0; 563 } 564 } 565 566 dev_err(&chip->client->dev, "Invalid value %d for led-max-microamp\n", 567 tmp); 568 569 return -EINVAL; 570 571 } 572 573 static int tsl2772_read_prox_diodes(struct tsl2772_chip *chip) 574 { 575 struct device_node *of_node = chip->client->dev.of_node; 576 int i, ret, num_leds, prox_diode_mask; 577 u32 leds[TSL2772_MAX_PROX_LEDS]; 578 579 ret = of_property_count_u32_elems(of_node, "amstaos,proximity-diodes"); 580 if (ret < 0) 581 return ret; 582 583 num_leds = ret; 584 if (num_leds > TSL2772_MAX_PROX_LEDS) 585 num_leds = TSL2772_MAX_PROX_LEDS; 586 587 ret = of_property_read_u32_array(of_node, "amstaos,proximity-diodes", 588 leds, num_leds); 589 if (ret < 0) { 590 dev_err(&chip->client->dev, 591 "Invalid value for amstaos,proximity-diodes: %d.\n", 592 ret); 593 return ret; 594 } 595 596 prox_diode_mask = 0; 597 for (i = 0; i < num_leds; i++) { 598 if (leds[i] == 0) 599 prox_diode_mask |= TSL2772_DIODE0; 600 else if (leds[i] == 1) 601 prox_diode_mask |= TSL2772_DIODE1; 602 else { 603 dev_err(&chip->client->dev, 604 "Invalid value %d in amstaos,proximity-diodes.\n", 605 leds[i]); 606 return -EINVAL; 607 } 608 } 609 610 return 0; 611 } 612 613 static void tsl2772_parse_dt(struct tsl2772_chip *chip) 614 { 615 tsl2772_read_prox_led_current(chip); 616 tsl2772_read_prox_diodes(chip); 617 } 618 619 /** 620 * tsl2772_defaults() - Populates the device nominal operating parameters 621 * with those provided by a 'platform' data struct or 622 * with prefined defaults. 623 * 624 * @chip: pointer to device structure. 625 */ 626 static void tsl2772_defaults(struct tsl2772_chip *chip) 627 { 628 /* If Operational settings defined elsewhere.. */ 629 if (chip->pdata && chip->pdata->platform_default_settings) 630 memcpy(&chip->settings, chip->pdata->platform_default_settings, 631 sizeof(tsl2772_default_settings)); 632 else 633 memcpy(&chip->settings, &tsl2772_default_settings, 634 sizeof(tsl2772_default_settings)); 635 636 /* Load up the proper lux table. */ 637 if (chip->pdata && chip->pdata->platform_lux_table[0].ch0 != 0) 638 memcpy(chip->tsl2772_device_lux, 639 chip->pdata->platform_lux_table, 640 sizeof(chip->pdata->platform_lux_table)); 641 else 642 memcpy(chip->tsl2772_device_lux, 643 tsl2772_default_lux_table_group[chip->id], 644 TSL2772_DEFAULT_TABLE_BYTES); 645 646 tsl2772_parse_dt(chip); 647 } 648 649 /** 650 * tsl2772_als_calibrate() - Obtain single reading and calculate 651 * the als_gain_trim. 652 * 653 * @indio_dev: pointer to IIO device 654 */ 655 static int tsl2772_als_calibrate(struct iio_dev *indio_dev) 656 { 657 struct tsl2772_chip *chip = iio_priv(indio_dev); 658 int ret, lux_val; 659 660 ret = i2c_smbus_read_byte_data(chip->client, 661 TSL2772_CMD_REG | TSL2772_CNTRL); 662 if (ret < 0) { 663 dev_err(&chip->client->dev, 664 "%s: failed to read from the CNTRL register\n", 665 __func__); 666 return ret; 667 } 668 669 if ((ret & (TSL2772_CNTL_ADC_ENBL | TSL2772_CNTL_PWR_ON)) 670 != (TSL2772_CNTL_ADC_ENBL | TSL2772_CNTL_PWR_ON)) { 671 dev_err(&chip->client->dev, 672 "%s: Device is not powered on and/or ADC is not enabled\n", 673 __func__); 674 return -EINVAL; 675 } else if ((ret & TSL2772_STA_ADC_VALID) != TSL2772_STA_ADC_VALID) { 676 dev_err(&chip->client->dev, 677 "%s: The two ADC channels have not completed an integration cycle\n", 678 __func__); 679 return -ENODATA; 680 } 681 682 lux_val = tsl2772_get_lux(indio_dev); 683 if (lux_val < 0) { 684 dev_err(&chip->client->dev, 685 "%s: failed to get lux\n", __func__); 686 return lux_val; 687 } 688 if (lux_val == 0) 689 return -ERANGE; 690 691 ret = (chip->settings.als_cal_target * chip->settings.als_gain_trim) / 692 lux_val; 693 if (ret < TSL2772_ALS_GAIN_TRIM_MIN || ret > TSL2772_ALS_GAIN_TRIM_MAX) 694 return -ERANGE; 695 696 chip->settings.als_gain_trim = ret; 697 698 return ret; 699 } 700 701 static void tsl2772_disable_regulators_action(void *_data) 702 { 703 struct tsl2772_chip *chip = _data; 704 705 regulator_bulk_disable(ARRAY_SIZE(chip->supplies), chip->supplies); 706 } 707 708 static int tsl2772_chip_on(struct iio_dev *indio_dev) 709 { 710 struct tsl2772_chip *chip = iio_priv(indio_dev); 711 int ret, i, als_count, als_time_us; 712 u8 *dev_reg, reg_val; 713 714 /* Non calculated parameters */ 715 chip->tsl2772_config[TSL2772_ALS_TIME] = chip->settings.als_time; 716 chip->tsl2772_config[TSL2772_PRX_TIME] = chip->settings.prox_time; 717 chip->tsl2772_config[TSL2772_WAIT_TIME] = chip->settings.wait_time; 718 chip->tsl2772_config[TSL2772_ALS_PRX_CONFIG] = 719 chip->settings.als_prox_config; 720 721 chip->tsl2772_config[TSL2772_ALS_MINTHRESHLO] = 722 (chip->settings.als_thresh_low) & 0xFF; 723 chip->tsl2772_config[TSL2772_ALS_MINTHRESHHI] = 724 (chip->settings.als_thresh_low >> 8) & 0xFF; 725 chip->tsl2772_config[TSL2772_ALS_MAXTHRESHLO] = 726 (chip->settings.als_thresh_high) & 0xFF; 727 chip->tsl2772_config[TSL2772_ALS_MAXTHRESHHI] = 728 (chip->settings.als_thresh_high >> 8) & 0xFF; 729 chip->tsl2772_config[TSL2772_PERSISTENCE] = 730 (chip->settings.prox_persistence & 0xFF) << 4 | 731 (chip->settings.als_persistence & 0xFF); 732 733 chip->tsl2772_config[TSL2772_PRX_COUNT] = 734 chip->settings.prox_pulse_count; 735 chip->tsl2772_config[TSL2772_PRX_MINTHRESHLO] = 736 (chip->settings.prox_thres_low) & 0xFF; 737 chip->tsl2772_config[TSL2772_PRX_MINTHRESHHI] = 738 (chip->settings.prox_thres_low >> 8) & 0xFF; 739 chip->tsl2772_config[TSL2772_PRX_MAXTHRESHLO] = 740 (chip->settings.prox_thres_high) & 0xFF; 741 chip->tsl2772_config[TSL2772_PRX_MAXTHRESHHI] = 742 (chip->settings.prox_thres_high >> 8) & 0xFF; 743 744 /* and make sure we're not already on */ 745 if (chip->tsl2772_chip_status == TSL2772_CHIP_WORKING) { 746 /* if forcing a register update - turn off, then on */ 747 dev_info(&chip->client->dev, "device is already enabled\n"); 748 return -EINVAL; 749 } 750 751 /* Set the gain based on tsl2772_settings struct */ 752 chip->tsl2772_config[TSL2772_GAIN] = 753 (chip->settings.als_gain & 0xFF) | 754 ((chip->settings.prox_gain & 0xFF) << 2) | 755 (chip->settings.prox_diode << 4) | 756 (chip->settings.prox_power << 6); 757 758 /* set chip time scaling and saturation */ 759 als_count = 256 - chip->settings.als_time; 760 als_time_us = als_count * tsl2772_int_time_avail[chip->id][3]; 761 chip->als_saturation = als_count * 768; /* 75% of full scale */ 762 chip->als_gain_time_scale = als_time_us * 763 tsl2772_als_gain[chip->settings.als_gain]; 764 765 /* 766 * TSL2772 Specific power-on / adc enable sequence 767 * Power on the device 1st. 768 */ 769 ret = tsl2772_write_control_reg(chip, TSL2772_CNTL_PWR_ON); 770 if (ret < 0) 771 return ret; 772 773 /* 774 * Use the following shadow copy for our delay before enabling ADC. 775 * Write all the registers. 776 */ 777 for (i = 0, dev_reg = chip->tsl2772_config; 778 i < TSL2772_MAX_CONFIG_REG; i++) { 779 int reg = TSL2772_CMD_REG + i; 780 781 ret = i2c_smbus_write_byte_data(chip->client, reg, 782 *dev_reg++); 783 if (ret < 0) { 784 dev_err(&chip->client->dev, 785 "%s: failed to write to register %x: %d\n", 786 __func__, reg, ret); 787 return ret; 788 } 789 } 790 791 /* Power-on settling time */ 792 usleep_range(3000, 3500); 793 794 reg_val = TSL2772_CNTL_PWR_ON | TSL2772_CNTL_ADC_ENBL | 795 TSL2772_CNTL_PROX_DET_ENBL; 796 if (chip->settings.als_interrupt_en) 797 reg_val |= TSL2772_CNTL_ALS_INT_ENBL; 798 if (chip->settings.prox_interrupt_en) 799 reg_val |= TSL2772_CNTL_PROX_INT_ENBL; 800 801 ret = tsl2772_write_control_reg(chip, reg_val); 802 if (ret < 0) 803 return ret; 804 805 ret = i2c_smbus_write_byte(chip->client, 806 TSL2772_CMD_REG | TSL2772_CMD_SPL_FN | 807 TSL2772_CMD_PROXALS_INT_CLR); 808 if (ret < 0) { 809 dev_err(&chip->client->dev, 810 "%s: failed to clear interrupt status: %d\n", 811 __func__, ret); 812 return ret; 813 } 814 815 chip->tsl2772_chip_status = TSL2772_CHIP_WORKING; 816 817 return ret; 818 } 819 820 static int tsl2772_chip_off(struct iio_dev *indio_dev) 821 { 822 struct tsl2772_chip *chip = iio_priv(indio_dev); 823 824 /* turn device off */ 825 chip->tsl2772_chip_status = TSL2772_CHIP_SUSPENDED; 826 return tsl2772_write_control_reg(chip, 0x00); 827 } 828 829 static void tsl2772_chip_off_action(void *data) 830 { 831 struct iio_dev *indio_dev = data; 832 833 tsl2772_chip_off(indio_dev); 834 } 835 836 /** 837 * tsl2772_invoke_change - power cycle the device to implement the user 838 * parameters 839 * @indio_dev: pointer to IIO device 840 * 841 * Obtain and lock both ALS and PROX resources, determine and save device state 842 * (On/Off), cycle device to implement updated parameter, put device back into 843 * proper state, and unlock resource. 844 */ 845 static int tsl2772_invoke_change(struct iio_dev *indio_dev) 846 { 847 struct tsl2772_chip *chip = iio_priv(indio_dev); 848 int device_status = chip->tsl2772_chip_status; 849 int ret; 850 851 mutex_lock(&chip->als_mutex); 852 mutex_lock(&chip->prox_mutex); 853 854 if (device_status == TSL2772_CHIP_WORKING) { 855 ret = tsl2772_chip_off(indio_dev); 856 if (ret < 0) 857 goto unlock; 858 } 859 860 ret = tsl2772_chip_on(indio_dev); 861 862 unlock: 863 mutex_unlock(&chip->prox_mutex); 864 mutex_unlock(&chip->als_mutex); 865 866 return ret; 867 } 868 869 static int tsl2772_prox_cal(struct iio_dev *indio_dev) 870 { 871 struct tsl2772_chip *chip = iio_priv(indio_dev); 872 int prox_history[MAX_SAMPLES_CAL + 1]; 873 int i, ret, mean, max, sample_sum; 874 875 if (chip->settings.prox_max_samples_cal < 1 || 876 chip->settings.prox_max_samples_cal > MAX_SAMPLES_CAL) 877 return -EINVAL; 878 879 for (i = 0; i < chip->settings.prox_max_samples_cal; i++) { 880 usleep_range(15000, 17500); 881 ret = tsl2772_get_prox(indio_dev); 882 if (ret < 0) 883 return ret; 884 885 prox_history[i] = chip->prox_data; 886 } 887 888 sample_sum = 0; 889 max = INT_MIN; 890 for (i = 0; i < chip->settings.prox_max_samples_cal; i++) { 891 sample_sum += prox_history[i]; 892 max = max(max, prox_history[i]); 893 } 894 mean = sample_sum / chip->settings.prox_max_samples_cal; 895 896 chip->settings.prox_thres_high = (max << 1) - mean; 897 898 return tsl2772_invoke_change(indio_dev); 899 } 900 901 static int tsl2772_read_avail(struct iio_dev *indio_dev, 902 struct iio_chan_spec const *chan, 903 const int **vals, int *type, int *length, 904 long mask) 905 { 906 struct tsl2772_chip *chip = iio_priv(indio_dev); 907 908 switch (mask) { 909 case IIO_CHAN_INFO_CALIBSCALE: 910 if (chan->type == IIO_INTENSITY) { 911 *length = ARRAY_SIZE(tsl2772_int_calibscale_avail); 912 *vals = tsl2772_int_calibscale_avail; 913 } else { 914 *length = ARRAY_SIZE(tsl2772_prox_calibscale_avail); 915 *vals = tsl2772_prox_calibscale_avail; 916 } 917 *type = IIO_VAL_INT; 918 return IIO_AVAIL_LIST; 919 case IIO_CHAN_INFO_INT_TIME: 920 *length = ARRAY_SIZE(tsl2772_int_time_avail[chip->id]); 921 *vals = tsl2772_int_time_avail[chip->id]; 922 *type = IIO_VAL_INT_PLUS_MICRO; 923 return IIO_AVAIL_RANGE; 924 } 925 926 return -EINVAL; 927 } 928 929 static ssize_t in_illuminance0_target_input_show(struct device *dev, 930 struct device_attribute *attr, 931 char *buf) 932 { 933 struct tsl2772_chip *chip = iio_priv(dev_to_iio_dev(dev)); 934 935 return scnprintf(buf, PAGE_SIZE, "%d\n", chip->settings.als_cal_target); 936 } 937 938 static ssize_t in_illuminance0_target_input_store(struct device *dev, 939 struct device_attribute *attr, 940 const char *buf, size_t len) 941 { 942 struct iio_dev *indio_dev = dev_to_iio_dev(dev); 943 struct tsl2772_chip *chip = iio_priv(indio_dev); 944 u16 value; 945 int ret; 946 947 if (kstrtou16(buf, 0, &value)) 948 return -EINVAL; 949 950 chip->settings.als_cal_target = value; 951 ret = tsl2772_invoke_change(indio_dev); 952 if (ret < 0) 953 return ret; 954 955 return len; 956 } 957 958 static ssize_t in_illuminance0_calibrate_store(struct device *dev, 959 struct device_attribute *attr, 960 const char *buf, size_t len) 961 { 962 struct iio_dev *indio_dev = dev_to_iio_dev(dev); 963 bool value; 964 int ret; 965 966 if (kstrtobool(buf, &value) || !value) 967 return -EINVAL; 968 969 ret = tsl2772_als_calibrate(indio_dev); 970 if (ret < 0) 971 return ret; 972 973 ret = tsl2772_invoke_change(indio_dev); 974 if (ret < 0) 975 return ret; 976 977 return len; 978 } 979 980 static ssize_t in_illuminance0_lux_table_show(struct device *dev, 981 struct device_attribute *attr, 982 char *buf) 983 { 984 struct tsl2772_chip *chip = iio_priv(dev_to_iio_dev(dev)); 985 int i = 0; 986 int offset = 0; 987 988 while (i < TSL2772_MAX_LUX_TABLE_SIZE) { 989 offset += scnprintf(buf + offset, PAGE_SIZE - offset, "%u,%u,", 990 chip->tsl2772_device_lux[i].ch0, 991 chip->tsl2772_device_lux[i].ch1); 992 if (chip->tsl2772_device_lux[i].ch0 == 0) { 993 /* 994 * We just printed the first "0" entry. 995 * Now get rid of the extra "," and break. 996 */ 997 offset--; 998 break; 999 } 1000 i++; 1001 } 1002 1003 offset += scnprintf(buf + offset, PAGE_SIZE - offset, "\n"); 1004 return offset; 1005 } 1006 1007 static ssize_t in_illuminance0_lux_table_store(struct device *dev, 1008 struct device_attribute *attr, 1009 const char *buf, size_t len) 1010 { 1011 struct iio_dev *indio_dev = dev_to_iio_dev(dev); 1012 struct tsl2772_chip *chip = iio_priv(indio_dev); 1013 int value[ARRAY_SIZE(chip->tsl2772_device_lux) * 2 + 1]; 1014 int n, ret; 1015 1016 get_options(buf, ARRAY_SIZE(value), value); 1017 1018 /* 1019 * We now have an array of ints starting at value[1], and 1020 * enumerated by value[0]. 1021 * We expect each group of two ints to be one table entry, 1022 * and the last table entry is all 0. 1023 */ 1024 n = value[0]; 1025 if ((n % 2) || n < 4 || 1026 n > ((ARRAY_SIZE(chip->tsl2772_device_lux) - 1) * 2)) 1027 return -EINVAL; 1028 1029 if ((value[(n - 1)] | value[n]) != 0) 1030 return -EINVAL; 1031 1032 if (chip->tsl2772_chip_status == TSL2772_CHIP_WORKING) { 1033 ret = tsl2772_chip_off(indio_dev); 1034 if (ret < 0) 1035 return ret; 1036 } 1037 1038 /* Zero out the table */ 1039 memset(chip->tsl2772_device_lux, 0, sizeof(chip->tsl2772_device_lux)); 1040 memcpy(chip->tsl2772_device_lux, &value[1], (value[0] * 4)); 1041 1042 ret = tsl2772_invoke_change(indio_dev); 1043 if (ret < 0) 1044 return ret; 1045 1046 return len; 1047 } 1048 1049 static ssize_t in_proximity0_calibrate_store(struct device *dev, 1050 struct device_attribute *attr, 1051 const char *buf, size_t len) 1052 { 1053 struct iio_dev *indio_dev = dev_to_iio_dev(dev); 1054 bool value; 1055 int ret; 1056 1057 if (kstrtobool(buf, &value) || !value) 1058 return -EINVAL; 1059 1060 ret = tsl2772_prox_cal(indio_dev); 1061 if (ret < 0) 1062 return ret; 1063 1064 ret = tsl2772_invoke_change(indio_dev); 1065 if (ret < 0) 1066 return ret; 1067 1068 return len; 1069 } 1070 1071 static int tsl2772_read_interrupt_config(struct iio_dev *indio_dev, 1072 const struct iio_chan_spec *chan, 1073 enum iio_event_type type, 1074 enum iio_event_direction dir) 1075 { 1076 struct tsl2772_chip *chip = iio_priv(indio_dev); 1077 1078 if (chan->type == IIO_INTENSITY) 1079 return chip->settings.als_interrupt_en; 1080 else 1081 return chip->settings.prox_interrupt_en; 1082 } 1083 1084 static int tsl2772_write_interrupt_config(struct iio_dev *indio_dev, 1085 const struct iio_chan_spec *chan, 1086 enum iio_event_type type, 1087 enum iio_event_direction dir, 1088 int val) 1089 { 1090 struct tsl2772_chip *chip = iio_priv(indio_dev); 1091 1092 if (chan->type == IIO_INTENSITY) 1093 chip->settings.als_interrupt_en = val ? true : false; 1094 else 1095 chip->settings.prox_interrupt_en = val ? true : false; 1096 1097 return tsl2772_invoke_change(indio_dev); 1098 } 1099 1100 static int tsl2772_write_event_value(struct iio_dev *indio_dev, 1101 const struct iio_chan_spec *chan, 1102 enum iio_event_type type, 1103 enum iio_event_direction dir, 1104 enum iio_event_info info, 1105 int val, int val2) 1106 { 1107 struct tsl2772_chip *chip = iio_priv(indio_dev); 1108 int ret = -EINVAL, count, persistence; 1109 u8 time; 1110 1111 switch (info) { 1112 case IIO_EV_INFO_VALUE: 1113 if (chan->type == IIO_INTENSITY) { 1114 switch (dir) { 1115 case IIO_EV_DIR_RISING: 1116 chip->settings.als_thresh_high = val; 1117 ret = 0; 1118 break; 1119 case IIO_EV_DIR_FALLING: 1120 chip->settings.als_thresh_low = val; 1121 ret = 0; 1122 break; 1123 default: 1124 break; 1125 } 1126 } else { 1127 switch (dir) { 1128 case IIO_EV_DIR_RISING: 1129 chip->settings.prox_thres_high = val; 1130 ret = 0; 1131 break; 1132 case IIO_EV_DIR_FALLING: 1133 chip->settings.prox_thres_low = val; 1134 ret = 0; 1135 break; 1136 default: 1137 break; 1138 } 1139 } 1140 break; 1141 case IIO_EV_INFO_PERIOD: 1142 if (chan->type == IIO_INTENSITY) 1143 time = chip->settings.als_time; 1144 else 1145 time = chip->settings.prox_time; 1146 1147 count = 256 - time; 1148 persistence = ((val * 1000000) + val2) / 1149 (count * tsl2772_int_time_avail[chip->id][3]); 1150 1151 if (chan->type == IIO_INTENSITY) { 1152 /* ALS filter values are 1, 2, 3, 5, 10, 15, ..., 60 */ 1153 if (persistence > 3) 1154 persistence = (persistence / 5) + 3; 1155 1156 chip->settings.als_persistence = persistence; 1157 } else { 1158 chip->settings.prox_persistence = persistence; 1159 } 1160 1161 ret = 0; 1162 break; 1163 default: 1164 break; 1165 } 1166 1167 if (ret < 0) 1168 return ret; 1169 1170 return tsl2772_invoke_change(indio_dev); 1171 } 1172 1173 static int tsl2772_read_event_value(struct iio_dev *indio_dev, 1174 const struct iio_chan_spec *chan, 1175 enum iio_event_type type, 1176 enum iio_event_direction dir, 1177 enum iio_event_info info, 1178 int *val, int *val2) 1179 { 1180 struct tsl2772_chip *chip = iio_priv(indio_dev); 1181 int filter_delay, persistence; 1182 u8 time; 1183 1184 switch (info) { 1185 case IIO_EV_INFO_VALUE: 1186 if (chan->type == IIO_INTENSITY) { 1187 switch (dir) { 1188 case IIO_EV_DIR_RISING: 1189 *val = chip->settings.als_thresh_high; 1190 return IIO_VAL_INT; 1191 case IIO_EV_DIR_FALLING: 1192 *val = chip->settings.als_thresh_low; 1193 return IIO_VAL_INT; 1194 default: 1195 return -EINVAL; 1196 } 1197 } else { 1198 switch (dir) { 1199 case IIO_EV_DIR_RISING: 1200 *val = chip->settings.prox_thres_high; 1201 return IIO_VAL_INT; 1202 case IIO_EV_DIR_FALLING: 1203 *val = chip->settings.prox_thres_low; 1204 return IIO_VAL_INT; 1205 default: 1206 return -EINVAL; 1207 } 1208 } 1209 break; 1210 case IIO_EV_INFO_PERIOD: 1211 if (chan->type == IIO_INTENSITY) { 1212 time = chip->settings.als_time; 1213 persistence = chip->settings.als_persistence; 1214 1215 /* ALS filter values are 1, 2, 3, 5, 10, 15, ..., 60 */ 1216 if (persistence > 3) 1217 persistence = (persistence - 3) * 5; 1218 } else { 1219 time = chip->settings.prox_time; 1220 persistence = chip->settings.prox_persistence; 1221 } 1222 1223 filter_delay = persistence * (256 - time) * 1224 tsl2772_int_time_avail[chip->id][3]; 1225 1226 *val = filter_delay / 1000000; 1227 *val2 = filter_delay % 1000000; 1228 return IIO_VAL_INT_PLUS_MICRO; 1229 default: 1230 return -EINVAL; 1231 } 1232 } 1233 1234 static int tsl2772_read_raw(struct iio_dev *indio_dev, 1235 struct iio_chan_spec const *chan, 1236 int *val, 1237 int *val2, 1238 long mask) 1239 { 1240 struct tsl2772_chip *chip = iio_priv(indio_dev); 1241 1242 switch (mask) { 1243 case IIO_CHAN_INFO_PROCESSED: 1244 switch (chan->type) { 1245 case IIO_LIGHT: 1246 tsl2772_get_lux(indio_dev); 1247 *val = chip->als_cur_info.lux; 1248 return IIO_VAL_INT; 1249 default: 1250 return -EINVAL; 1251 } 1252 case IIO_CHAN_INFO_RAW: 1253 switch (chan->type) { 1254 case IIO_INTENSITY: 1255 tsl2772_get_lux(indio_dev); 1256 if (chan->channel == 0) 1257 *val = chip->als_cur_info.als_ch0; 1258 else 1259 *val = chip->als_cur_info.als_ch1; 1260 return IIO_VAL_INT; 1261 case IIO_PROXIMITY: 1262 tsl2772_get_prox(indio_dev); 1263 *val = chip->prox_data; 1264 return IIO_VAL_INT; 1265 default: 1266 return -EINVAL; 1267 } 1268 break; 1269 case IIO_CHAN_INFO_CALIBSCALE: 1270 if (chan->type == IIO_LIGHT) 1271 *val = tsl2772_als_gain[chip->settings.als_gain]; 1272 else 1273 *val = tsl2772_prox_gain[chip->settings.prox_gain]; 1274 return IIO_VAL_INT; 1275 case IIO_CHAN_INFO_CALIBBIAS: 1276 *val = chip->settings.als_gain_trim; 1277 return IIO_VAL_INT; 1278 case IIO_CHAN_INFO_INT_TIME: 1279 *val = 0; 1280 *val2 = (256 - chip->settings.als_time) * 1281 tsl2772_int_time_avail[chip->id][3]; 1282 return IIO_VAL_INT_PLUS_MICRO; 1283 default: 1284 return -EINVAL; 1285 } 1286 } 1287 1288 static int tsl2772_write_raw(struct iio_dev *indio_dev, 1289 struct iio_chan_spec const *chan, 1290 int val, 1291 int val2, 1292 long mask) 1293 { 1294 struct tsl2772_chip *chip = iio_priv(indio_dev); 1295 1296 switch (mask) { 1297 case IIO_CHAN_INFO_CALIBSCALE: 1298 if (chan->type == IIO_INTENSITY) { 1299 switch (val) { 1300 case 1: 1301 chip->settings.als_gain = 0; 1302 break; 1303 case 8: 1304 chip->settings.als_gain = 1; 1305 break; 1306 case 16: 1307 chip->settings.als_gain = 2; 1308 break; 1309 case 120: 1310 chip->settings.als_gain = 3; 1311 break; 1312 default: 1313 return -EINVAL; 1314 } 1315 } else { 1316 switch (val) { 1317 case 1: 1318 chip->settings.prox_gain = 0; 1319 break; 1320 case 2: 1321 chip->settings.prox_gain = 1; 1322 break; 1323 case 4: 1324 chip->settings.prox_gain = 2; 1325 break; 1326 case 8: 1327 chip->settings.prox_gain = 3; 1328 break; 1329 default: 1330 return -EINVAL; 1331 } 1332 } 1333 break; 1334 case IIO_CHAN_INFO_CALIBBIAS: 1335 if (val < TSL2772_ALS_GAIN_TRIM_MIN || 1336 val > TSL2772_ALS_GAIN_TRIM_MAX) 1337 return -EINVAL; 1338 1339 chip->settings.als_gain_trim = val; 1340 break; 1341 case IIO_CHAN_INFO_INT_TIME: 1342 if (val != 0 || val2 < tsl2772_int_time_avail[chip->id][1] || 1343 val2 > tsl2772_int_time_avail[chip->id][5]) 1344 return -EINVAL; 1345 1346 chip->settings.als_time = 256 - 1347 (val2 / tsl2772_int_time_avail[chip->id][3]); 1348 break; 1349 default: 1350 return -EINVAL; 1351 } 1352 1353 return tsl2772_invoke_change(indio_dev); 1354 } 1355 1356 static DEVICE_ATTR_RW(in_illuminance0_target_input); 1357 1358 static DEVICE_ATTR_WO(in_illuminance0_calibrate); 1359 1360 static DEVICE_ATTR_WO(in_proximity0_calibrate); 1361 1362 static DEVICE_ATTR_RW(in_illuminance0_lux_table); 1363 1364 /* Use the default register values to identify the Taos device */ 1365 static int tsl2772_device_id_verif(int id, int target) 1366 { 1367 switch (target) { 1368 case tsl2571: 1369 case tsl2671: 1370 case tsl2771: 1371 return (id & 0xf0) == TRITON_ID; 1372 case tmd2671: 1373 case tmd2771: 1374 return (id & 0xf0) == HALIBUT_ID; 1375 case tsl2572: 1376 case tsl2672: 1377 case tmd2672: 1378 case tsl2772: 1379 case tmd2772: 1380 case apds9930: 1381 return (id & 0xf0) == SWORDFISH_ID; 1382 } 1383 1384 return -EINVAL; 1385 } 1386 1387 static irqreturn_t tsl2772_event_handler(int irq, void *private) 1388 { 1389 struct iio_dev *indio_dev = private; 1390 struct tsl2772_chip *chip = iio_priv(indio_dev); 1391 s64 timestamp = iio_get_time_ns(indio_dev); 1392 int ret; 1393 1394 ret = tsl2772_read_status(chip); 1395 if (ret < 0) 1396 return IRQ_HANDLED; 1397 1398 /* What type of interrupt do we need to process */ 1399 if (ret & TSL2772_STA_PRX_INTR) { 1400 iio_push_event(indio_dev, 1401 IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 1402 0, 1403 IIO_EV_TYPE_THRESH, 1404 IIO_EV_DIR_EITHER), 1405 timestamp); 1406 } 1407 1408 if (ret & TSL2772_STA_ALS_INTR) { 1409 iio_push_event(indio_dev, 1410 IIO_UNMOD_EVENT_CODE(IIO_LIGHT, 1411 0, 1412 IIO_EV_TYPE_THRESH, 1413 IIO_EV_DIR_EITHER), 1414 timestamp); 1415 } 1416 1417 ret = i2c_smbus_write_byte(chip->client, 1418 TSL2772_CMD_REG | TSL2772_CMD_SPL_FN | 1419 TSL2772_CMD_PROXALS_INT_CLR); 1420 if (ret < 0) 1421 dev_err(&chip->client->dev, 1422 "%s: failed to clear interrupt status: %d\n", 1423 __func__, ret); 1424 1425 return IRQ_HANDLED; 1426 } 1427 1428 static struct attribute *tsl2772_ALS_device_attrs[] = { 1429 &dev_attr_in_illuminance0_target_input.attr, 1430 &dev_attr_in_illuminance0_calibrate.attr, 1431 &dev_attr_in_illuminance0_lux_table.attr, 1432 NULL 1433 }; 1434 1435 static struct attribute *tsl2772_PRX_device_attrs[] = { 1436 &dev_attr_in_proximity0_calibrate.attr, 1437 NULL 1438 }; 1439 1440 static struct attribute *tsl2772_ALSPRX_device_attrs[] = { 1441 &dev_attr_in_illuminance0_target_input.attr, 1442 &dev_attr_in_illuminance0_calibrate.attr, 1443 &dev_attr_in_illuminance0_lux_table.attr, 1444 NULL 1445 }; 1446 1447 static struct attribute *tsl2772_PRX2_device_attrs[] = { 1448 &dev_attr_in_proximity0_calibrate.attr, 1449 NULL 1450 }; 1451 1452 static struct attribute *tsl2772_ALSPRX2_device_attrs[] = { 1453 &dev_attr_in_illuminance0_target_input.attr, 1454 &dev_attr_in_illuminance0_calibrate.attr, 1455 &dev_attr_in_illuminance0_lux_table.attr, 1456 &dev_attr_in_proximity0_calibrate.attr, 1457 NULL 1458 }; 1459 1460 static const struct attribute_group tsl2772_device_attr_group_tbl[] = { 1461 [ALS] = { 1462 .attrs = tsl2772_ALS_device_attrs, 1463 }, 1464 [PRX] = { 1465 .attrs = tsl2772_PRX_device_attrs, 1466 }, 1467 [ALSPRX] = { 1468 .attrs = tsl2772_ALSPRX_device_attrs, 1469 }, 1470 [PRX2] = { 1471 .attrs = tsl2772_PRX2_device_attrs, 1472 }, 1473 [ALSPRX2] = { 1474 .attrs = tsl2772_ALSPRX2_device_attrs, 1475 }, 1476 }; 1477 1478 #define TSL2772_DEVICE_INFO(type)[type] = \ 1479 { \ 1480 .attrs = &tsl2772_device_attr_group_tbl[type], \ 1481 .read_raw = &tsl2772_read_raw, \ 1482 .read_avail = &tsl2772_read_avail, \ 1483 .write_raw = &tsl2772_write_raw, \ 1484 .read_event_value = &tsl2772_read_event_value, \ 1485 .write_event_value = &tsl2772_write_event_value, \ 1486 .read_event_config = &tsl2772_read_interrupt_config, \ 1487 .write_event_config = &tsl2772_write_interrupt_config, \ 1488 } 1489 1490 static const struct iio_info tsl2772_device_info[] = { 1491 TSL2772_DEVICE_INFO(ALS), 1492 TSL2772_DEVICE_INFO(PRX), 1493 TSL2772_DEVICE_INFO(ALSPRX), 1494 TSL2772_DEVICE_INFO(PRX2), 1495 TSL2772_DEVICE_INFO(ALSPRX2), 1496 }; 1497 1498 static const struct iio_event_spec tsl2772_events[] = { 1499 { 1500 .type = IIO_EV_TYPE_THRESH, 1501 .dir = IIO_EV_DIR_RISING, 1502 .mask_separate = BIT(IIO_EV_INFO_VALUE), 1503 }, { 1504 .type = IIO_EV_TYPE_THRESH, 1505 .dir = IIO_EV_DIR_FALLING, 1506 .mask_separate = BIT(IIO_EV_INFO_VALUE), 1507 }, { 1508 .type = IIO_EV_TYPE_THRESH, 1509 .dir = IIO_EV_DIR_EITHER, 1510 .mask_separate = BIT(IIO_EV_INFO_PERIOD) | 1511 BIT(IIO_EV_INFO_ENABLE), 1512 }, 1513 }; 1514 1515 static const struct tsl2772_chip_info tsl2772_chip_info_tbl[] = { 1516 [ALS] = { 1517 .channel_with_events = { 1518 { 1519 .type = IIO_LIGHT, 1520 .indexed = 1, 1521 .channel = 0, 1522 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), 1523 }, { 1524 .type = IIO_INTENSITY, 1525 .indexed = 1, 1526 .channel = 0, 1527 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1528 BIT(IIO_CHAN_INFO_INT_TIME) | 1529 BIT(IIO_CHAN_INFO_CALIBSCALE) | 1530 BIT(IIO_CHAN_INFO_CALIBBIAS), 1531 .info_mask_separate_available = 1532 BIT(IIO_CHAN_INFO_INT_TIME) | 1533 BIT(IIO_CHAN_INFO_CALIBSCALE), 1534 .event_spec = tsl2772_events, 1535 .num_event_specs = ARRAY_SIZE(tsl2772_events), 1536 }, { 1537 .type = IIO_INTENSITY, 1538 .indexed = 1, 1539 .channel = 1, 1540 }, 1541 }, 1542 .channel_without_events = { 1543 { 1544 .type = IIO_LIGHT, 1545 .indexed = 1, 1546 .channel = 0, 1547 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), 1548 }, { 1549 .type = IIO_INTENSITY, 1550 .indexed = 1, 1551 .channel = 0, 1552 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1553 BIT(IIO_CHAN_INFO_INT_TIME) | 1554 BIT(IIO_CHAN_INFO_CALIBSCALE) | 1555 BIT(IIO_CHAN_INFO_CALIBBIAS), 1556 .info_mask_separate_available = 1557 BIT(IIO_CHAN_INFO_INT_TIME) | 1558 BIT(IIO_CHAN_INFO_CALIBSCALE), 1559 }, { 1560 .type = IIO_INTENSITY, 1561 .indexed = 1, 1562 .channel = 1, 1563 }, 1564 }, 1565 .chan_table_elements = 3, 1566 .info = &tsl2772_device_info[ALS], 1567 }, 1568 [PRX] = { 1569 .channel_with_events = { 1570 { 1571 .type = IIO_PROXIMITY, 1572 .indexed = 1, 1573 .channel = 0, 1574 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1575 .event_spec = tsl2772_events, 1576 .num_event_specs = ARRAY_SIZE(tsl2772_events), 1577 }, 1578 }, 1579 .channel_without_events = { 1580 { 1581 .type = IIO_PROXIMITY, 1582 .indexed = 1, 1583 .channel = 0, 1584 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1585 }, 1586 }, 1587 .chan_table_elements = 1, 1588 .info = &tsl2772_device_info[PRX], 1589 }, 1590 [ALSPRX] = { 1591 .channel_with_events = { 1592 { 1593 .type = IIO_LIGHT, 1594 .indexed = 1, 1595 .channel = 0, 1596 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), 1597 }, { 1598 .type = IIO_INTENSITY, 1599 .indexed = 1, 1600 .channel = 0, 1601 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1602 BIT(IIO_CHAN_INFO_INT_TIME) | 1603 BIT(IIO_CHAN_INFO_CALIBSCALE) | 1604 BIT(IIO_CHAN_INFO_CALIBBIAS), 1605 .info_mask_separate_available = 1606 BIT(IIO_CHAN_INFO_INT_TIME) | 1607 BIT(IIO_CHAN_INFO_CALIBSCALE), 1608 .event_spec = tsl2772_events, 1609 .num_event_specs = ARRAY_SIZE(tsl2772_events), 1610 }, { 1611 .type = IIO_INTENSITY, 1612 .indexed = 1, 1613 .channel = 1, 1614 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1615 }, { 1616 .type = IIO_PROXIMITY, 1617 .indexed = 1, 1618 .channel = 0, 1619 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1620 .event_spec = tsl2772_events, 1621 .num_event_specs = ARRAY_SIZE(tsl2772_events), 1622 }, 1623 }, 1624 .channel_without_events = { 1625 { 1626 .type = IIO_LIGHT, 1627 .indexed = 1, 1628 .channel = 0, 1629 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), 1630 }, { 1631 .type = IIO_INTENSITY, 1632 .indexed = 1, 1633 .channel = 0, 1634 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1635 BIT(IIO_CHAN_INFO_INT_TIME) | 1636 BIT(IIO_CHAN_INFO_CALIBSCALE) | 1637 BIT(IIO_CHAN_INFO_CALIBBIAS), 1638 .info_mask_separate_available = 1639 BIT(IIO_CHAN_INFO_INT_TIME) | 1640 BIT(IIO_CHAN_INFO_CALIBSCALE), 1641 }, { 1642 .type = IIO_INTENSITY, 1643 .indexed = 1, 1644 .channel = 1, 1645 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1646 }, { 1647 .type = IIO_PROXIMITY, 1648 .indexed = 1, 1649 .channel = 0, 1650 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1651 }, 1652 }, 1653 .chan_table_elements = 4, 1654 .info = &tsl2772_device_info[ALSPRX], 1655 }, 1656 [PRX2] = { 1657 .channel_with_events = { 1658 { 1659 .type = IIO_PROXIMITY, 1660 .indexed = 1, 1661 .channel = 0, 1662 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1663 BIT(IIO_CHAN_INFO_CALIBSCALE), 1664 .info_mask_separate_available = 1665 BIT(IIO_CHAN_INFO_CALIBSCALE), 1666 .event_spec = tsl2772_events, 1667 .num_event_specs = ARRAY_SIZE(tsl2772_events), 1668 }, 1669 }, 1670 .channel_without_events = { 1671 { 1672 .type = IIO_PROXIMITY, 1673 .indexed = 1, 1674 .channel = 0, 1675 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1676 BIT(IIO_CHAN_INFO_CALIBSCALE), 1677 .info_mask_separate_available = 1678 BIT(IIO_CHAN_INFO_CALIBSCALE), 1679 }, 1680 }, 1681 .chan_table_elements = 1, 1682 .info = &tsl2772_device_info[PRX2], 1683 }, 1684 [ALSPRX2] = { 1685 .channel_with_events = { 1686 { 1687 .type = IIO_LIGHT, 1688 .indexed = 1, 1689 .channel = 0, 1690 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), 1691 }, { 1692 .type = IIO_INTENSITY, 1693 .indexed = 1, 1694 .channel = 0, 1695 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1696 BIT(IIO_CHAN_INFO_INT_TIME) | 1697 BIT(IIO_CHAN_INFO_CALIBSCALE) | 1698 BIT(IIO_CHAN_INFO_CALIBBIAS), 1699 .info_mask_separate_available = 1700 BIT(IIO_CHAN_INFO_INT_TIME) | 1701 BIT(IIO_CHAN_INFO_CALIBSCALE), 1702 .event_spec = tsl2772_events, 1703 .num_event_specs = ARRAY_SIZE(tsl2772_events), 1704 }, { 1705 .type = IIO_INTENSITY, 1706 .indexed = 1, 1707 .channel = 1, 1708 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1709 }, { 1710 .type = IIO_PROXIMITY, 1711 .indexed = 1, 1712 .channel = 0, 1713 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1714 BIT(IIO_CHAN_INFO_CALIBSCALE), 1715 .info_mask_separate_available = 1716 BIT(IIO_CHAN_INFO_CALIBSCALE), 1717 .event_spec = tsl2772_events, 1718 .num_event_specs = ARRAY_SIZE(tsl2772_events), 1719 }, 1720 }, 1721 .channel_without_events = { 1722 { 1723 .type = IIO_LIGHT, 1724 .indexed = 1, 1725 .channel = 0, 1726 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), 1727 }, { 1728 .type = IIO_INTENSITY, 1729 .indexed = 1, 1730 .channel = 0, 1731 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1732 BIT(IIO_CHAN_INFO_INT_TIME) | 1733 BIT(IIO_CHAN_INFO_CALIBSCALE) | 1734 BIT(IIO_CHAN_INFO_CALIBBIAS), 1735 .info_mask_separate_available = 1736 BIT(IIO_CHAN_INFO_INT_TIME) | 1737 BIT(IIO_CHAN_INFO_CALIBSCALE), 1738 }, { 1739 .type = IIO_INTENSITY, 1740 .indexed = 1, 1741 .channel = 1, 1742 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), 1743 }, { 1744 .type = IIO_PROXIMITY, 1745 .indexed = 1, 1746 .channel = 0, 1747 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | 1748 BIT(IIO_CHAN_INFO_CALIBSCALE), 1749 .info_mask_separate_available = 1750 BIT(IIO_CHAN_INFO_CALIBSCALE), 1751 }, 1752 }, 1753 .chan_table_elements = 4, 1754 .info = &tsl2772_device_info[ALSPRX2], 1755 }, 1756 }; 1757 1758 static int tsl2772_probe(struct i2c_client *clientp, 1759 const struct i2c_device_id *id) 1760 { 1761 struct iio_dev *indio_dev; 1762 struct tsl2772_chip *chip; 1763 int ret; 1764 1765 indio_dev = devm_iio_device_alloc(&clientp->dev, sizeof(*chip)); 1766 if (!indio_dev) 1767 return -ENOMEM; 1768 1769 chip = iio_priv(indio_dev); 1770 chip->client = clientp; 1771 i2c_set_clientdata(clientp, indio_dev); 1772 1773 chip->supplies[TSL2772_SUPPLY_VDD].supply = "vdd"; 1774 chip->supplies[TSL2772_SUPPLY_VDDIO].supply = "vddio"; 1775 1776 ret = devm_regulator_bulk_get(&clientp->dev, 1777 ARRAY_SIZE(chip->supplies), 1778 chip->supplies); 1779 if (ret < 0) 1780 return dev_err_probe(&clientp->dev, ret, "Failed to get regulators\n"); 1781 1782 ret = regulator_bulk_enable(ARRAY_SIZE(chip->supplies), chip->supplies); 1783 if (ret < 0) { 1784 dev_err(&clientp->dev, "Failed to enable regulators: %d\n", 1785 ret); 1786 return ret; 1787 } 1788 1789 ret = devm_add_action_or_reset(&clientp->dev, 1790 tsl2772_disable_regulators_action, 1791 chip); 1792 if (ret < 0) { 1793 dev_err(&clientp->dev, "Failed to setup regulator cleanup action %d\n", 1794 ret); 1795 return ret; 1796 } 1797 1798 usleep_range(TSL2772_BOOT_MIN_SLEEP_TIME, TSL2772_BOOT_MAX_SLEEP_TIME); 1799 1800 ret = i2c_smbus_read_byte_data(chip->client, 1801 TSL2772_CMD_REG | TSL2772_CHIPID); 1802 if (ret < 0) 1803 return ret; 1804 1805 if (tsl2772_device_id_verif(ret, id->driver_data) <= 0) { 1806 dev_info(&chip->client->dev, 1807 "%s: i2c device found does not match expected id\n", 1808 __func__); 1809 return -EINVAL; 1810 } 1811 1812 ret = i2c_smbus_write_byte(clientp, TSL2772_CMD_REG | TSL2772_CNTRL); 1813 if (ret < 0) { 1814 dev_err(&clientp->dev, 1815 "%s: Failed to write to CMD register: %d\n", 1816 __func__, ret); 1817 return ret; 1818 } 1819 1820 mutex_init(&chip->als_mutex); 1821 mutex_init(&chip->prox_mutex); 1822 1823 chip->tsl2772_chip_status = TSL2772_CHIP_UNKNOWN; 1824 chip->pdata = dev_get_platdata(&clientp->dev); 1825 chip->id = id->driver_data; 1826 chip->chip_info = 1827 &tsl2772_chip_info_tbl[device_channel_config[id->driver_data]]; 1828 1829 indio_dev->info = chip->chip_info->info; 1830 indio_dev->modes = INDIO_DIRECT_MODE; 1831 indio_dev->name = chip->client->name; 1832 indio_dev->num_channels = chip->chip_info->chan_table_elements; 1833 1834 if (clientp->irq) { 1835 indio_dev->channels = chip->chip_info->channel_with_events; 1836 1837 ret = devm_request_threaded_irq(&clientp->dev, clientp->irq, 1838 NULL, 1839 &tsl2772_event_handler, 1840 IRQF_TRIGGER_FALLING | 1841 IRQF_ONESHOT, 1842 "TSL2772_event", 1843 indio_dev); 1844 if (ret) { 1845 dev_err(&clientp->dev, 1846 "%s: irq request failed\n", __func__); 1847 return ret; 1848 } 1849 } else { 1850 indio_dev->channels = chip->chip_info->channel_without_events; 1851 } 1852 1853 tsl2772_defaults(chip); 1854 ret = tsl2772_chip_on(indio_dev); 1855 if (ret < 0) 1856 return ret; 1857 1858 ret = devm_add_action_or_reset(&clientp->dev, 1859 tsl2772_chip_off_action, 1860 indio_dev); 1861 if (ret < 0) 1862 return ret; 1863 1864 return devm_iio_device_register(&clientp->dev, indio_dev); 1865 } 1866 1867 static int tsl2772_suspend(struct device *dev) 1868 { 1869 struct iio_dev *indio_dev = dev_get_drvdata(dev); 1870 struct tsl2772_chip *chip = iio_priv(indio_dev); 1871 int ret; 1872 1873 ret = tsl2772_chip_off(indio_dev); 1874 regulator_bulk_disable(ARRAY_SIZE(chip->supplies), chip->supplies); 1875 1876 return ret; 1877 } 1878 1879 static int tsl2772_resume(struct device *dev) 1880 { 1881 struct iio_dev *indio_dev = dev_get_drvdata(dev); 1882 struct tsl2772_chip *chip = iio_priv(indio_dev); 1883 int ret; 1884 1885 ret = regulator_bulk_enable(ARRAY_SIZE(chip->supplies), chip->supplies); 1886 if (ret < 0) 1887 return ret; 1888 1889 usleep_range(TSL2772_BOOT_MIN_SLEEP_TIME, TSL2772_BOOT_MAX_SLEEP_TIME); 1890 1891 return tsl2772_chip_on(indio_dev); 1892 } 1893 1894 static const struct i2c_device_id tsl2772_idtable[] = { 1895 { "tsl2571", tsl2571 }, 1896 { "tsl2671", tsl2671 }, 1897 { "tmd2671", tmd2671 }, 1898 { "tsl2771", tsl2771 }, 1899 { "tmd2771", tmd2771 }, 1900 { "tsl2572", tsl2572 }, 1901 { "tsl2672", tsl2672 }, 1902 { "tmd2672", tmd2672 }, 1903 { "tsl2772", tsl2772 }, 1904 { "tmd2772", tmd2772 }, 1905 { "apds9930", apds9930}, 1906 {} 1907 }; 1908 1909 MODULE_DEVICE_TABLE(i2c, tsl2772_idtable); 1910 1911 static const struct of_device_id tsl2772_of_match[] = { 1912 { .compatible = "amstaos,tsl2571" }, 1913 { .compatible = "amstaos,tsl2671" }, 1914 { .compatible = "amstaos,tmd2671" }, 1915 { .compatible = "amstaos,tsl2771" }, 1916 { .compatible = "amstaos,tmd2771" }, 1917 { .compatible = "amstaos,tsl2572" }, 1918 { .compatible = "amstaos,tsl2672" }, 1919 { .compatible = "amstaos,tmd2672" }, 1920 { .compatible = "amstaos,tsl2772" }, 1921 { .compatible = "amstaos,tmd2772" }, 1922 { .compatible = "avago,apds9930" }, 1923 {} 1924 }; 1925 MODULE_DEVICE_TABLE(of, tsl2772_of_match); 1926 1927 static const struct dev_pm_ops tsl2772_pm_ops = { 1928 .suspend = tsl2772_suspend, 1929 .resume = tsl2772_resume, 1930 }; 1931 1932 static struct i2c_driver tsl2772_driver = { 1933 .driver = { 1934 .name = "tsl2772", 1935 .of_match_table = tsl2772_of_match, 1936 .pm = &tsl2772_pm_ops, 1937 }, 1938 .id_table = tsl2772_idtable, 1939 .probe = tsl2772_probe, 1940 }; 1941 1942 module_i2c_driver(tsl2772_driver); 1943 1944 MODULE_AUTHOR("J. August Brenner <Jon.Brenner@ams.com>"); 1945 MODULE_AUTHOR("Brian Masney <masneyb@onstation.org>"); 1946 MODULE_DESCRIPTION("TAOS tsl2772 ambient and proximity light sensor driver"); 1947 MODULE_LICENSE("GPL"); 1948