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1// SPDX-License-Identifier: GPL-2.0+2/*3 * Device driver for monitoring ambient light intensity in (lux) and proximity4 * 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/property.h>19#include <linux/slab.h>20 21#include <linux/iio/events.h>22#include <linux/iio/iio.h>23#include <linux/iio/sysfs.h>24#include <linux/platform_data/tsl2772.h>25#include <linux/regulator/consumer.h>26 27/* Cal defs */28#define PROX_STAT_CAL 029#define PROX_STAT_SAMP 130#define MAX_SAMPLES_CAL 20031 32/* TSL2772 Device ID */33#define TRITON_ID 0x0034#define SWORDFISH_ID 0x3035#define HALIBUT_ID 0x2036 37/* Lux calculation constants */38#define TSL2772_LUX_CALC_OVER_FLOW 6553539 40/*41 * TAOS Register definitions - Note: depending on device, some of these register42 * are not used and the register address is benign.43 */44 45/* Register offsets */46#define TSL2772_MAX_CONFIG_REG 1647 48/* Device Registers and Masks */49#define TSL2772_CNTRL 0x0050#define TSL2772_ALS_TIME 0X0151#define TSL2772_PRX_TIME 0x0252#define TSL2772_WAIT_TIME 0x0353#define TSL2772_ALS_MINTHRESHLO 0X0454#define TSL2772_ALS_MINTHRESHHI 0X0555#define TSL2772_ALS_MAXTHRESHLO 0X0656#define TSL2772_ALS_MAXTHRESHHI 0X0757#define TSL2772_PRX_MINTHRESHLO 0X0858#define TSL2772_PRX_MINTHRESHHI 0X0959#define TSL2772_PRX_MAXTHRESHLO 0X0A60#define TSL2772_PRX_MAXTHRESHHI 0X0B61#define TSL2772_PERSISTENCE 0x0C62#define TSL2772_ALS_PRX_CONFIG 0x0D63#define TSL2772_PRX_COUNT 0x0E64#define TSL2772_GAIN 0x0F65#define TSL2772_NOTUSED 0x1066#define TSL2772_REVID 0x1167#define TSL2772_CHIPID 0x1268#define TSL2772_STATUS 0x1369#define TSL2772_ALS_CHAN0LO 0x1470#define TSL2772_ALS_CHAN0HI 0x1571#define TSL2772_ALS_CHAN1LO 0x1672#define TSL2772_ALS_CHAN1HI 0x1773#define TSL2772_PRX_LO 0x1874#define TSL2772_PRX_HI 0x1975 76/* tsl2772 cmd reg masks */77#define TSL2772_CMD_REG 0x8078#define TSL2772_CMD_SPL_FN 0x6079#define TSL2772_CMD_REPEAT_PROTO 0x0080#define TSL2772_CMD_AUTOINC_PROTO 0x2081 82#define TSL2772_CMD_PROX_INT_CLR 0X0583#define TSL2772_CMD_ALS_INT_CLR 0x0684#define TSL2772_CMD_PROXALS_INT_CLR 0X0785 86/* tsl2772 cntrl reg masks */87#define TSL2772_CNTL_ADC_ENBL 0x0288#define TSL2772_CNTL_PWR_ON 0x0189 90/* tsl2772 status reg masks */91#define TSL2772_STA_ADC_VALID 0x0192#define TSL2772_STA_PRX_VALID 0x0293#define TSL2772_STA_ADC_PRX_VALID (TSL2772_STA_ADC_VALID | \94 TSL2772_STA_PRX_VALID)95#define TSL2772_STA_ALS_INTR 0x1096#define TSL2772_STA_PRX_INTR 0x2097 98/* tsl2772 cntrl reg masks */99#define TSL2772_CNTL_REG_CLEAR 0x00100#define TSL2772_CNTL_PROX_INT_ENBL 0X20101#define TSL2772_CNTL_ALS_INT_ENBL 0X10102#define TSL2772_CNTL_WAIT_TMR_ENBL 0X08103#define TSL2772_CNTL_PROX_DET_ENBL 0X04104#define TSL2772_CNTL_PWRON 0x01105#define TSL2772_CNTL_ALSPON_ENBL 0x03106#define TSL2772_CNTL_INTALSPON_ENBL 0x13107#define TSL2772_CNTL_PROXPON_ENBL 0x0F108#define TSL2772_CNTL_INTPROXPON_ENBL 0x2F109 110#define TSL2772_ALS_GAIN_TRIM_MIN 250111#define TSL2772_ALS_GAIN_TRIM_MAX 4000112 113#define TSL2772_MAX_PROX_LEDS 2114 115#define TSL2772_BOOT_MIN_SLEEP_TIME 10000116#define TSL2772_BOOT_MAX_SLEEP_TIME 28000117 118/* Device family members */119enum {120 tsl2571,121 tsl2671,122 tmd2671,123 tsl2771,124 tmd2771,125 tsl2572,126 tsl2672,127 tmd2672,128 tsl2772,129 tmd2772,130 apds9930,131};132 133enum {134 TSL2772_CHIP_UNKNOWN = 0,135 TSL2772_CHIP_WORKING = 1,136 TSL2772_CHIP_SUSPENDED = 2137};138 139enum {140 TSL2772_SUPPLY_VDD = 0,141 TSL2772_SUPPLY_VDDIO = 1,142 TSL2772_NUM_SUPPLIES = 2143};144 145/* Per-device data */146struct tsl2772_als_info {147 u16 als_ch0;148 u16 als_ch1;149 u16 lux;150};151 152struct tsl2772_chip_info {153 int chan_table_elements;154 struct iio_chan_spec channel_with_events[4];155 struct iio_chan_spec channel_without_events[4];156 const struct iio_info *info;157};158 159static const int tsl2772_led_currents[][2] = {160 { 100000, TSL2772_100_mA },161 { 50000, TSL2772_50_mA },162 { 25000, TSL2772_25_mA },163 { 13000, TSL2772_13_mA },164 { 0, 0 }165};166 167struct tsl2772_chip {168 kernel_ulong_t id;169 struct mutex prox_mutex;170 struct mutex als_mutex;171 struct i2c_client *client;172 struct regulator_bulk_data supplies[TSL2772_NUM_SUPPLIES];173 u16 prox_data;174 struct tsl2772_als_info als_cur_info;175 struct tsl2772_settings settings;176 struct tsl2772_platform_data *pdata;177 int als_gain_time_scale;178 int als_saturation;179 int tsl2772_chip_status;180 u8 tsl2772_config[TSL2772_MAX_CONFIG_REG];181 const struct tsl2772_chip_info *chip_info;182 const struct iio_info *info;183 s64 event_timestamp;184 /*185 * This structure is intentionally large to accommodate186 * updates via sysfs.187 * Sized to 9 = max 8 segments + 1 termination segment188 */189 struct tsl2772_lux tsl2772_device_lux[TSL2772_MAX_LUX_TABLE_SIZE];190};191 192/*193 * Different devices require different coefficents, and these numbers were194 * derived from the 'Lux Equation' section of the various device datasheets.195 * All of these coefficients assume a Glass Attenuation (GA) factor of 1.196 * The coefficients are multiplied by 1000 to avoid floating point operations.197 * The two rows in each table correspond to the Lux1 and Lux2 equations from198 * the datasheets.199 */200static const struct tsl2772_lux tsl2x71_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = {201 { 53000, 106000 },202 { 31800, 53000 },203 { 0, 0 },204};205 206static const struct tsl2772_lux tmd2x71_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = {207 { 24000, 48000 },208 { 14400, 24000 },209 { 0, 0 },210};211 212static const struct tsl2772_lux tsl2x72_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = {213 { 60000, 112200 },214 { 37800, 60000 },215 { 0, 0 },216};217 218static const struct tsl2772_lux tmd2x72_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = {219 { 20000, 35000 },220 { 12600, 20000 },221 { 0, 0 },222};223 224static const struct tsl2772_lux apds9930_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = {225 { 52000, 96824 },226 { 38792, 67132 },227 { 0, 0 },228};229 230static const struct tsl2772_lux *tsl2772_default_lux_table_group[] = {231 [tsl2571] = tsl2x71_lux_table,232 [tsl2671] = tsl2x71_lux_table,233 [tmd2671] = tmd2x71_lux_table,234 [tsl2771] = tsl2x71_lux_table,235 [tmd2771] = tmd2x71_lux_table,236 [tsl2572] = tsl2x72_lux_table,237 [tsl2672] = tsl2x72_lux_table,238 [tmd2672] = tmd2x72_lux_table,239 [tsl2772] = tsl2x72_lux_table,240 [tmd2772] = tmd2x72_lux_table,241 [apds9930] = apds9930_lux_table,242};243 244static const struct tsl2772_settings tsl2772_default_settings = {245 .als_time = 255, /* 2.72 / 2.73 ms */246 .als_gain = 0,247 .prox_time = 255, /* 2.72 / 2.73 ms */248 .prox_gain = 0,249 .wait_time = 255,250 .als_prox_config = 0,251 .als_gain_trim = 1000,252 .als_cal_target = 150,253 .als_persistence = 1,254 .als_interrupt_en = false,255 .als_thresh_low = 200,256 .als_thresh_high = 256,257 .prox_persistence = 1,258 .prox_interrupt_en = false,259 .prox_thres_low = 0,260 .prox_thres_high = 512,261 .prox_max_samples_cal = 30,262 .prox_pulse_count = 8,263 .prox_diode = TSL2772_DIODE1,264 .prox_power = TSL2772_100_mA265};266 267static const s16 tsl2772_als_gain[] = {268 1,269 8,270 16,271 120272};273 274static const s16 tsl2772_prox_gain[] = {275 1,276 2,277 4,278 8279};280 281static const int tsl2772_int_time_avail[][6] = {282 [tsl2571] = { 0, 2720, 0, 2720, 0, 696000 },283 [tsl2671] = { 0, 2720, 0, 2720, 0, 696000 },284 [tmd2671] = { 0, 2720, 0, 2720, 0, 696000 },285 [tsl2771] = { 0, 2720, 0, 2720, 0, 696000 },286 [tmd2771] = { 0, 2720, 0, 2720, 0, 696000 },287 [tsl2572] = { 0, 2730, 0, 2730, 0, 699000 },288 [tsl2672] = { 0, 2730, 0, 2730, 0, 699000 },289 [tmd2672] = { 0, 2730, 0, 2730, 0, 699000 },290 [tsl2772] = { 0, 2730, 0, 2730, 0, 699000 },291 [tmd2772] = { 0, 2730, 0, 2730, 0, 699000 },292 [apds9930] = { 0, 2730, 0, 2730, 0, 699000 },293};294 295static int tsl2772_int_calibscale_avail[] = { 1, 8, 16, 120 };296 297static int tsl2772_prox_calibscale_avail[] = { 1, 2, 4, 8 };298 299/* Channel variations */300enum {301 ALS,302 PRX,303 ALSPRX,304 PRX2,305 ALSPRX2,306};307 308static const u8 device_channel_config[] = {309 [tsl2571] = ALS,310 [tsl2671] = PRX,311 [tmd2671] = PRX,312 [tsl2771] = ALSPRX,313 [tmd2771] = ALSPRX,314 [tsl2572] = ALS,315 [tsl2672] = PRX2,316 [tmd2672] = PRX2,317 [tsl2772] = ALSPRX2,318 [tmd2772] = ALSPRX2,319 [apds9930] = ALSPRX2,320};321 322static int tsl2772_read_status(struct tsl2772_chip *chip)323{324 int ret;325 326 ret = i2c_smbus_read_byte_data(chip->client,327 TSL2772_CMD_REG | TSL2772_STATUS);328 if (ret < 0)329 dev_err(&chip->client->dev,330 "%s: failed to read STATUS register: %d\n", __func__,331 ret);332 333 return ret;334}335 336static int tsl2772_write_control_reg(struct tsl2772_chip *chip, u8 data)337{338 int ret;339 340 ret = i2c_smbus_write_byte_data(chip->client,341 TSL2772_CMD_REG | TSL2772_CNTRL, data);342 if (ret < 0) {343 dev_err(&chip->client->dev,344 "%s: failed to write to control register %x: %d\n",345 __func__, data, ret);346 }347 348 return ret;349}350 351static int tsl2772_read_autoinc_regs(struct tsl2772_chip *chip, int lower_reg,352 int upper_reg)353{354 u8 buf[2];355 int ret;356 357 ret = i2c_smbus_write_byte(chip->client,358 TSL2772_CMD_REG | TSL2772_CMD_AUTOINC_PROTO |359 lower_reg);360 if (ret < 0) {361 dev_err(&chip->client->dev,362 "%s: failed to enable auto increment protocol: %d\n",363 __func__, ret);364 return ret;365 }366 367 ret = i2c_smbus_read_byte_data(chip->client,368 TSL2772_CMD_REG | lower_reg);369 if (ret < 0) {370 dev_err(&chip->client->dev,371 "%s: failed to read from register %x: %d\n", __func__,372 lower_reg, ret);373 return ret;374 }375 buf[0] = ret;376 377 ret = i2c_smbus_read_byte_data(chip->client,378 TSL2772_CMD_REG | upper_reg);379 if (ret < 0) {380 dev_err(&chip->client->dev,381 "%s: failed to read from register %x: %d\n", __func__,382 upper_reg, ret);383 return ret;384 }385 buf[1] = ret;386 387 ret = i2c_smbus_write_byte(chip->client,388 TSL2772_CMD_REG | TSL2772_CMD_REPEAT_PROTO |389 lower_reg);390 if (ret < 0) {391 dev_err(&chip->client->dev,392 "%s: failed to enable repeated byte protocol: %d\n",393 __func__, ret);394 return ret;395 }396 397 return le16_to_cpup((const __le16 *)&buf[0]);398}399 400/**401 * tsl2772_get_lux() - Reads and calculates current lux value.402 * @indio_dev: pointer to IIO device403 *404 * The raw ch0 and ch1 values of the ambient light sensed in the last405 * integration cycle are read from the device. The raw values are multiplied406 * by a device-specific scale factor, and divided by the integration time and407 * device gain. The code supports multiple lux equations through the lux table408 * coefficients. A lux gain trim is applied to each lux equation, and then the409 * maximum lux within the interval 0..65535 is selected.410 */411static int tsl2772_get_lux(struct iio_dev *indio_dev)412{413 struct tsl2772_chip *chip = iio_priv(indio_dev);414 struct tsl2772_lux *p;415 int max_lux, ret;416 bool overflow;417 418 mutex_lock(&chip->als_mutex);419 420 if (chip->tsl2772_chip_status != TSL2772_CHIP_WORKING) {421 dev_err(&chip->client->dev, "%s: device is not enabled\n",422 __func__);423 ret = -EBUSY;424 goto out_unlock;425 }426 427 ret = tsl2772_read_status(chip);428 if (ret < 0)429 goto out_unlock;430 431 if (!(ret & TSL2772_STA_ADC_VALID)) {432 dev_err(&chip->client->dev,433 "%s: data not valid yet\n", __func__);434 ret = chip->als_cur_info.lux; /* return LAST VALUE */435 goto out_unlock;436 }437 438 ret = tsl2772_read_autoinc_regs(chip, TSL2772_ALS_CHAN0LO,439 TSL2772_ALS_CHAN0HI);440 if (ret < 0)441 goto out_unlock;442 chip->als_cur_info.als_ch0 = ret;443 444 ret = tsl2772_read_autoinc_regs(chip, TSL2772_ALS_CHAN1LO,445 TSL2772_ALS_CHAN1HI);446 if (ret < 0)447 goto out_unlock;448 chip->als_cur_info.als_ch1 = ret;449 450 if (chip->als_cur_info.als_ch0 >= chip->als_saturation) {451 max_lux = TSL2772_LUX_CALC_OVER_FLOW;452 goto update_struct_with_max_lux;453 }454 455 if (!chip->als_cur_info.als_ch0) {456 /* have no data, so return LAST VALUE */457 ret = chip->als_cur_info.lux;458 goto out_unlock;459 }460 461 max_lux = 0;462 overflow = false;463 for (p = (struct tsl2772_lux *)chip->tsl2772_device_lux; p->ch0 != 0;464 p++) {465 int lux;466 467 lux = ((chip->als_cur_info.als_ch0 * p->ch0) -468 (chip->als_cur_info.als_ch1 * p->ch1)) /469 chip->als_gain_time_scale;470 471 /*472 * The als_gain_trim can have a value within the range 250..4000473 * and is a multiplier for the lux. A trim of 1000 makes no474 * changes to the lux, less than 1000 scales it down, and475 * greater than 1000 scales it up.476 */477 lux = (lux * chip->settings.als_gain_trim) / 1000;478 479 if (lux > TSL2772_LUX_CALC_OVER_FLOW) {480 overflow = true;481 continue;482 }483 484 max_lux = max(max_lux, lux);485 }486 487 if (overflow && max_lux == 0)488 max_lux = TSL2772_LUX_CALC_OVER_FLOW;489 490update_struct_with_max_lux:491 chip->als_cur_info.lux = max_lux;492 ret = max_lux;493 494out_unlock:495 mutex_unlock(&chip->als_mutex);496 497 return ret;498}499 500/**501 * tsl2772_get_prox() - Reads proximity data registers and updates502 * chip->prox_data.503 *504 * @indio_dev: pointer to IIO device505 */506static int tsl2772_get_prox(struct iio_dev *indio_dev)507{508 struct tsl2772_chip *chip = iio_priv(indio_dev);509 int ret;510 511 mutex_lock(&chip->prox_mutex);512 513 ret = tsl2772_read_status(chip);514 if (ret < 0)515 goto prox_poll_err;516 517 switch (chip->id) {518 case tsl2571:519 case tsl2671:520 case tmd2671:521 case tsl2771:522 case tmd2771:523 if (!(ret & TSL2772_STA_ADC_VALID)) {524 ret = -EINVAL;525 goto prox_poll_err;526 }527 break;528 case tsl2572:529 case tsl2672:530 case tmd2672:531 case tsl2772:532 case tmd2772:533 case apds9930:534 if (!(ret & TSL2772_STA_PRX_VALID)) {535 ret = -EINVAL;536 goto prox_poll_err;537 }538 break;539 }540 541 ret = tsl2772_read_autoinc_regs(chip, TSL2772_PRX_LO, TSL2772_PRX_HI);542 if (ret < 0)543 goto prox_poll_err;544 chip->prox_data = ret;545 546prox_poll_err:547 mutex_unlock(&chip->prox_mutex);548 549 return ret;550}551 552static int tsl2772_read_prox_led_current(struct tsl2772_chip *chip)553{554 struct device *dev = &chip->client->dev;555 int ret, tmp, i;556 557 ret = device_property_read_u32(dev, "led-max-microamp", &tmp);558 if (ret < 0)559 return ret;560 561 for (i = 0; tsl2772_led_currents[i][0] != 0; i++) {562 if (tmp == tsl2772_led_currents[i][0]) {563 chip->settings.prox_power = tsl2772_led_currents[i][1];564 return 0;565 }566 }567 568 dev_err(dev, "Invalid value %d for led-max-microamp\n", tmp);569 570 return -EINVAL;571}572 573static int tsl2772_read_prox_diodes(struct tsl2772_chip *chip)574{575 struct device *dev = &chip->client->dev;576 int i, ret, num_leds, prox_diode_mask;577 u32 leds[TSL2772_MAX_PROX_LEDS];578 579 ret = device_property_count_u32(dev, "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 = device_property_read_u32_array(dev, "amstaos,proximity-diodes", leds, num_leds);588 if (ret < 0) {589 dev_err(dev, "Invalid value for amstaos,proximity-diodes: %d.\n", ret);590 return ret;591 }592 593 prox_diode_mask = 0;594 for (i = 0; i < num_leds; i++) {595 if (leds[i] == 0)596 prox_diode_mask |= TSL2772_DIODE0;597 else if (leds[i] == 1)598 prox_diode_mask |= TSL2772_DIODE1;599 else {600 dev_err(dev, "Invalid value %d in amstaos,proximity-diodes.\n", leds[i]);601 return -EINVAL;602 }603 }604 chip->settings.prox_diode = prox_diode_mask;605 606 return 0;607}608 609static void tsl2772_parse_dt(struct tsl2772_chip *chip)610{611 tsl2772_read_prox_led_current(chip);612 tsl2772_read_prox_diodes(chip);613}614 615/**616 * tsl2772_defaults() - Populates the device nominal operating parameters617 * with those provided by a 'platform' data struct or618 * with prefined defaults.619 *620 * @chip: pointer to device structure.621 */622static void tsl2772_defaults(struct tsl2772_chip *chip)623{624 /* If Operational settings defined elsewhere.. */625 if (chip->pdata && chip->pdata->platform_default_settings)626 memcpy(&chip->settings, chip->pdata->platform_default_settings,627 sizeof(tsl2772_default_settings));628 else629 memcpy(&chip->settings, &tsl2772_default_settings,630 sizeof(tsl2772_default_settings));631 632 /* Load up the proper lux table. */633 if (chip->pdata && chip->pdata->platform_lux_table[0].ch0 != 0)634 memcpy(chip->tsl2772_device_lux,635 chip->pdata->platform_lux_table,636 sizeof(chip->pdata->platform_lux_table));637 else638 memcpy(chip->tsl2772_device_lux,639 tsl2772_default_lux_table_group[chip->id],640 TSL2772_DEFAULT_TABLE_BYTES);641 642 tsl2772_parse_dt(chip);643}644 645/**646 * tsl2772_als_calibrate() - Obtain single reading and calculate647 * the als_gain_trim.648 *649 * @indio_dev: pointer to IIO device650 */651static int tsl2772_als_calibrate(struct iio_dev *indio_dev)652{653 struct tsl2772_chip *chip = iio_priv(indio_dev);654 int ret, lux_val;655 656 ret = i2c_smbus_read_byte_data(chip->client,657 TSL2772_CMD_REG | TSL2772_CNTRL);658 if (ret < 0) {659 dev_err(&chip->client->dev,660 "%s: failed to read from the CNTRL register\n",661 __func__);662 return ret;663 }664 665 if ((ret & (TSL2772_CNTL_ADC_ENBL | TSL2772_CNTL_PWR_ON))666 != (TSL2772_CNTL_ADC_ENBL | TSL2772_CNTL_PWR_ON)) {667 dev_err(&chip->client->dev,668 "%s: Device is not powered on and/or ADC is not enabled\n",669 __func__);670 return -EINVAL;671 } else if ((ret & TSL2772_STA_ADC_VALID) != TSL2772_STA_ADC_VALID) {672 dev_err(&chip->client->dev,673 "%s: The two ADC channels have not completed an integration cycle\n",674 __func__);675 return -ENODATA;676 }677 678 lux_val = tsl2772_get_lux(indio_dev);679 if (lux_val < 0) {680 dev_err(&chip->client->dev,681 "%s: failed to get lux\n", __func__);682 return lux_val;683 }684 if (lux_val == 0)685 return -ERANGE;686 687 ret = (chip->settings.als_cal_target * chip->settings.als_gain_trim) /688 lux_val;689 if (ret < TSL2772_ALS_GAIN_TRIM_MIN || ret > TSL2772_ALS_GAIN_TRIM_MAX)690 return -ERANGE;691 692 chip->settings.als_gain_trim = ret;693 694 return ret;695}696 697static void tsl2772_disable_regulators_action(void *_data)698{699 struct tsl2772_chip *chip = _data;700 701 regulator_bulk_disable(ARRAY_SIZE(chip->supplies), chip->supplies);702}703 704static int tsl2772_chip_on(struct iio_dev *indio_dev)705{706 struct tsl2772_chip *chip = iio_priv(indio_dev);707 int ret, i, als_count, als_time_us;708 u8 *dev_reg, reg_val;709 710 /* Non calculated parameters */711 chip->tsl2772_config[TSL2772_ALS_TIME] = chip->settings.als_time;712 chip->tsl2772_config[TSL2772_PRX_TIME] = chip->settings.prox_time;713 chip->tsl2772_config[TSL2772_WAIT_TIME] = chip->settings.wait_time;714 chip->tsl2772_config[TSL2772_ALS_PRX_CONFIG] =715 chip->settings.als_prox_config;716 717 chip->tsl2772_config[TSL2772_ALS_MINTHRESHLO] =718 (chip->settings.als_thresh_low) & 0xFF;719 chip->tsl2772_config[TSL2772_ALS_MINTHRESHHI] =720 (chip->settings.als_thresh_low >> 8) & 0xFF;721 chip->tsl2772_config[TSL2772_ALS_MAXTHRESHLO] =722 (chip->settings.als_thresh_high) & 0xFF;723 chip->tsl2772_config[TSL2772_ALS_MAXTHRESHHI] =724 (chip->settings.als_thresh_high >> 8) & 0xFF;725 chip->tsl2772_config[TSL2772_PERSISTENCE] =726 (chip->settings.prox_persistence & 0xFF) << 4 |727 (chip->settings.als_persistence & 0xFF);728 729 chip->tsl2772_config[TSL2772_PRX_COUNT] =730 chip->settings.prox_pulse_count;731 chip->tsl2772_config[TSL2772_PRX_MINTHRESHLO] =732 (chip->settings.prox_thres_low) & 0xFF;733 chip->tsl2772_config[TSL2772_PRX_MINTHRESHHI] =734 (chip->settings.prox_thres_low >> 8) & 0xFF;735 chip->tsl2772_config[TSL2772_PRX_MAXTHRESHLO] =736 (chip->settings.prox_thres_high) & 0xFF;737 chip->tsl2772_config[TSL2772_PRX_MAXTHRESHHI] =738 (chip->settings.prox_thres_high >> 8) & 0xFF;739 740 /* and make sure we're not already on */741 if (chip->tsl2772_chip_status == TSL2772_CHIP_WORKING) {742 /* if forcing a register update - turn off, then on */743 dev_info(&chip->client->dev, "device is already enabled\n");744 return -EINVAL;745 }746 747 /* Set the gain based on tsl2772_settings struct */748 chip->tsl2772_config[TSL2772_GAIN] =749 (chip->settings.als_gain & 0xFF) |750 ((chip->settings.prox_gain & 0xFF) << 2) |751 (chip->settings.prox_diode << 4) |752 (chip->settings.prox_power << 6);753 754 /* set chip time scaling and saturation */755 als_count = 256 - chip->settings.als_time;756 als_time_us = als_count * tsl2772_int_time_avail[chip->id][3];757 chip->als_saturation = als_count * 768; /* 75% of full scale */758 chip->als_gain_time_scale = als_time_us *759 tsl2772_als_gain[chip->settings.als_gain];760 761 /*762 * TSL2772 Specific power-on / adc enable sequence763 * Power on the device 1st.764 */765 ret = tsl2772_write_control_reg(chip, TSL2772_CNTL_PWR_ON);766 if (ret < 0)767 return ret;768 769 /*770 * Use the following shadow copy for our delay before enabling ADC.771 * Write all the registers.772 */773 for (i = 0, dev_reg = chip->tsl2772_config;774 i < TSL2772_MAX_CONFIG_REG; i++) {775 int reg = TSL2772_CMD_REG + i;776 777 ret = i2c_smbus_write_byte_data(chip->client, reg,778 *dev_reg++);779 if (ret < 0) {780 dev_err(&chip->client->dev,781 "%s: failed to write to register %x: %d\n",782 __func__, reg, ret);783 return ret;784 }785 }786 787 /* Power-on settling time */788 usleep_range(3000, 3500);789 790 reg_val = TSL2772_CNTL_PWR_ON | TSL2772_CNTL_ADC_ENBL |791 TSL2772_CNTL_PROX_DET_ENBL;792 if (chip->settings.als_interrupt_en)793 reg_val |= TSL2772_CNTL_ALS_INT_ENBL;794 if (chip->settings.prox_interrupt_en)795 reg_val |= TSL2772_CNTL_PROX_INT_ENBL;796 797 ret = tsl2772_write_control_reg(chip, reg_val);798 if (ret < 0)799 return ret;800 801 ret = i2c_smbus_write_byte(chip->client,802 TSL2772_CMD_REG | TSL2772_CMD_SPL_FN |803 TSL2772_CMD_PROXALS_INT_CLR);804 if (ret < 0) {805 dev_err(&chip->client->dev,806 "%s: failed to clear interrupt status: %d\n",807 __func__, ret);808 return ret;809 }810 811 chip->tsl2772_chip_status = TSL2772_CHIP_WORKING;812 813 return ret;814}815 816static int tsl2772_chip_off(struct iio_dev *indio_dev)817{818 struct tsl2772_chip *chip = iio_priv(indio_dev);819 820 /* turn device off */821 chip->tsl2772_chip_status = TSL2772_CHIP_SUSPENDED;822 return tsl2772_write_control_reg(chip, 0x00);823}824 825static void tsl2772_chip_off_action(void *data)826{827 struct iio_dev *indio_dev = data;828 829 tsl2772_chip_off(indio_dev);830}831 832/**833 * tsl2772_invoke_change - power cycle the device to implement the user834 * parameters835 * @indio_dev: pointer to IIO device836 *837 * Obtain and lock both ALS and PROX resources, determine and save device state838 * (On/Off), cycle device to implement updated parameter, put device back into839 * proper state, and unlock resource.840 */841static int tsl2772_invoke_change(struct iio_dev *indio_dev)842{843 struct tsl2772_chip *chip = iio_priv(indio_dev);844 int device_status = chip->tsl2772_chip_status;845 int ret;846 847 mutex_lock(&chip->als_mutex);848 mutex_lock(&chip->prox_mutex);849 850 if (device_status == TSL2772_CHIP_WORKING) {851 ret = tsl2772_chip_off(indio_dev);852 if (ret < 0)853 goto unlock;854 }855 856 ret = tsl2772_chip_on(indio_dev);857 858unlock:859 mutex_unlock(&chip->prox_mutex);860 mutex_unlock(&chip->als_mutex);861 862 return ret;863}864 865static int tsl2772_prox_cal(struct iio_dev *indio_dev)866{867 struct tsl2772_chip *chip = iio_priv(indio_dev);868 int prox_history[MAX_SAMPLES_CAL + 1];869 int i, ret, mean, max, sample_sum;870 871 if (chip->settings.prox_max_samples_cal < 1 ||872 chip->settings.prox_max_samples_cal > MAX_SAMPLES_CAL)873 return -EINVAL;874 875 for (i = 0; i < chip->settings.prox_max_samples_cal; i++) {876 usleep_range(15000, 17500);877 ret = tsl2772_get_prox(indio_dev);878 if (ret < 0)879 return ret;880 881 prox_history[i] = chip->prox_data;882 }883 884 sample_sum = 0;885 max = INT_MIN;886 for (i = 0; i < chip->settings.prox_max_samples_cal; i++) {887 sample_sum += prox_history[i];888 max = max(max, prox_history[i]);889 }890 mean = sample_sum / chip->settings.prox_max_samples_cal;891 892 chip->settings.prox_thres_high = (max << 1) - mean;893 894 return tsl2772_invoke_change(indio_dev);895}896 897static int tsl2772_read_avail(struct iio_dev *indio_dev,898 struct iio_chan_spec const *chan,899 const int **vals, int *type, int *length,900 long mask)901{902 struct tsl2772_chip *chip = iio_priv(indio_dev);903 904 switch (mask) {905 case IIO_CHAN_INFO_CALIBSCALE:906 if (chan->type == IIO_INTENSITY) {907 *length = ARRAY_SIZE(tsl2772_int_calibscale_avail);908 *vals = tsl2772_int_calibscale_avail;909 } else {910 *length = ARRAY_SIZE(tsl2772_prox_calibscale_avail);911 *vals = tsl2772_prox_calibscale_avail;912 }913 *type = IIO_VAL_INT;914 return IIO_AVAIL_LIST;915 case IIO_CHAN_INFO_INT_TIME:916 *length = ARRAY_SIZE(tsl2772_int_time_avail[chip->id]);917 *vals = tsl2772_int_time_avail[chip->id];918 *type = IIO_VAL_INT_PLUS_MICRO;919 return IIO_AVAIL_RANGE;920 }921 922 return -EINVAL;923}924 925static ssize_t in_illuminance0_target_input_show(struct device *dev,926 struct device_attribute *attr,927 char *buf)928{929 struct tsl2772_chip *chip = iio_priv(dev_to_iio_dev(dev));930 931 return scnprintf(buf, PAGE_SIZE, "%d\n", chip->settings.als_cal_target);932}933 934static ssize_t in_illuminance0_target_input_store(struct device *dev,935 struct device_attribute *attr,936 const char *buf, size_t len)937{938 struct iio_dev *indio_dev = dev_to_iio_dev(dev);939 struct tsl2772_chip *chip = iio_priv(indio_dev);940 u16 value;941 int ret;942 943 if (kstrtou16(buf, 0, &value))944 return -EINVAL;945 946 chip->settings.als_cal_target = value;947 ret = tsl2772_invoke_change(indio_dev);948 if (ret < 0)949 return ret;950 951 return len;952}953 954static ssize_t in_illuminance0_calibrate_store(struct device *dev,955 struct device_attribute *attr,956 const char *buf, size_t len)957{958 struct iio_dev *indio_dev = dev_to_iio_dev(dev);959 bool value;960 int ret;961 962 if (kstrtobool(buf, &value) || !value)963 return -EINVAL;964 965 ret = tsl2772_als_calibrate(indio_dev);966 if (ret < 0)967 return ret;968 969 ret = tsl2772_invoke_change(indio_dev);970 if (ret < 0)971 return ret;972 973 return len;974}975 976static ssize_t in_illuminance0_lux_table_show(struct device *dev,977 struct device_attribute *attr,978 char *buf)979{980 struct tsl2772_chip *chip = iio_priv(dev_to_iio_dev(dev));981 int i = 0;982 int offset = 0;983 984 while (i < TSL2772_MAX_LUX_TABLE_SIZE) {985 offset += scnprintf(buf + offset, PAGE_SIZE - offset, "%u,%u,",986 chip->tsl2772_device_lux[i].ch0,987 chip->tsl2772_device_lux[i].ch1);988 if (chip->tsl2772_device_lux[i].ch0 == 0) {989 /*990 * We just printed the first "0" entry.991 * Now get rid of the extra "," and break.992 */993 offset--;994 break;995 }996 i++;997 }998 999 offset += scnprintf(buf + offset, PAGE_SIZE - offset, "\n");1000 return offset;1001}1002 1003static ssize_t in_illuminance0_lux_table_store(struct device *dev,1004 struct device_attribute *attr,1005 const char *buf, size_t len)1006{1007 struct iio_dev *indio_dev = dev_to_iio_dev(dev);1008 struct tsl2772_chip *chip = iio_priv(indio_dev);1009 int value[ARRAY_SIZE(chip->tsl2772_device_lux) * 2 + 1];1010 int n, ret;1011 1012 get_options(buf, ARRAY_SIZE(value), value);1013 1014 /*1015 * We now have an array of ints starting at value[1], and1016 * enumerated by value[0].1017 * We expect each group of two ints to be one table entry,1018 * and the last table entry is all 0.1019 */1020 n = value[0];1021 if ((n % 2) || n < 4 ||1022 n > ((ARRAY_SIZE(chip->tsl2772_device_lux) - 1) * 2))1023 return -EINVAL;1024 1025 if ((value[(n - 1)] | value[n]) != 0)1026 return -EINVAL;1027 1028 if (chip->tsl2772_chip_status == TSL2772_CHIP_WORKING) {1029 ret = tsl2772_chip_off(indio_dev);1030 if (ret < 0)1031 return ret;1032 }1033 1034 /* Zero out the table */1035 memset(chip->tsl2772_device_lux, 0, sizeof(chip->tsl2772_device_lux));1036 memcpy(chip->tsl2772_device_lux, &value[1], (value[0] * 4));1037 1038 ret = tsl2772_invoke_change(indio_dev);1039 if (ret < 0)1040 return ret;1041 1042 return len;1043}1044 1045static ssize_t in_proximity0_calibrate_store(struct device *dev,1046 struct device_attribute *attr,1047 const char *buf, size_t len)1048{1049 struct iio_dev *indio_dev = dev_to_iio_dev(dev);1050 bool value;1051 int ret;1052 1053 if (kstrtobool(buf, &value) || !value)1054 return -EINVAL;1055 1056 ret = tsl2772_prox_cal(indio_dev);1057 if (ret < 0)1058 return ret;1059 1060 ret = tsl2772_invoke_change(indio_dev);1061 if (ret < 0)1062 return ret;1063 1064 return len;1065}1066 1067static int tsl2772_read_interrupt_config(struct iio_dev *indio_dev,1068 const struct iio_chan_spec *chan,1069 enum iio_event_type type,1070 enum iio_event_direction dir)1071{1072 struct tsl2772_chip *chip = iio_priv(indio_dev);1073 1074 if (chan->type == IIO_INTENSITY)1075 return chip->settings.als_interrupt_en;1076 else1077 return chip->settings.prox_interrupt_en;1078}1079 1080static int tsl2772_write_interrupt_config(struct iio_dev *indio_dev,1081 const struct iio_chan_spec *chan,1082 enum iio_event_type type,1083 enum iio_event_direction dir,1084 int val)1085{1086 struct tsl2772_chip *chip = iio_priv(indio_dev);1087 1088 if (chan->type == IIO_INTENSITY)1089 chip->settings.als_interrupt_en = val ? true : false;1090 else1091 chip->settings.prox_interrupt_en = val ? true : false;1092 1093 return tsl2772_invoke_change(indio_dev);1094}1095 1096static int tsl2772_write_event_value(struct iio_dev *indio_dev,1097 const struct iio_chan_spec *chan,1098 enum iio_event_type type,1099 enum iio_event_direction dir,1100 enum iio_event_info info,1101 int val, int val2)1102{1103 struct tsl2772_chip *chip = iio_priv(indio_dev);1104 int ret = -EINVAL, count, persistence;1105 u8 time;1106 1107 switch (info) {1108 case IIO_EV_INFO_VALUE:1109 if (chan->type == IIO_INTENSITY) {1110 switch (dir) {1111 case IIO_EV_DIR_RISING:1112 chip->settings.als_thresh_high = val;1113 ret = 0;1114 break;1115 case IIO_EV_DIR_FALLING:1116 chip->settings.als_thresh_low = val;1117 ret = 0;1118 break;1119 default:1120 break;1121 }1122 } else {1123 switch (dir) {1124 case IIO_EV_DIR_RISING:1125 chip->settings.prox_thres_high = val;1126 ret = 0;1127 break;1128 case IIO_EV_DIR_FALLING:1129 chip->settings.prox_thres_low = val;1130 ret = 0;1131 break;1132 default:1133 break;1134 }1135 }1136 break;1137 case IIO_EV_INFO_PERIOD:1138 if (chan->type == IIO_INTENSITY)1139 time = chip->settings.als_time;1140 else1141 time = chip->settings.prox_time;1142 1143 count = 256 - time;1144 persistence = ((val * 1000000) + val2) /1145 (count * tsl2772_int_time_avail[chip->id][3]);1146 1147 if (chan->type == IIO_INTENSITY) {1148 /* ALS filter values are 1, 2, 3, 5, 10, 15, ..., 60 */1149 if (persistence > 3)1150 persistence = (persistence / 5) + 3;1151 1152 chip->settings.als_persistence = persistence;1153 } else {1154 chip->settings.prox_persistence = persistence;1155 }1156 1157 ret = 0;1158 break;1159 default:1160 break;1161 }1162 1163 if (ret < 0)1164 return ret;1165 1166 return tsl2772_invoke_change(indio_dev);1167}1168 1169static int tsl2772_read_event_value(struct iio_dev *indio_dev,1170 const struct iio_chan_spec *chan,1171 enum iio_event_type type,1172 enum iio_event_direction dir,1173 enum iio_event_info info,1174 int *val, int *val2)1175{1176 struct tsl2772_chip *chip = iio_priv(indio_dev);1177 int filter_delay, persistence;1178 u8 time;1179 1180 switch (info) {1181 case IIO_EV_INFO_VALUE:1182 if (chan->type == IIO_INTENSITY) {1183 switch (dir) {1184 case IIO_EV_DIR_RISING:1185 *val = chip->settings.als_thresh_high;1186 return IIO_VAL_INT;1187 case IIO_EV_DIR_FALLING:1188 *val = chip->settings.als_thresh_low;1189 return IIO_VAL_INT;1190 default:1191 return -EINVAL;1192 }1193 } else {1194 switch (dir) {1195 case IIO_EV_DIR_RISING:1196 *val = chip->settings.prox_thres_high;1197 return IIO_VAL_INT;1198 case IIO_EV_DIR_FALLING:1199 *val = chip->settings.prox_thres_low;1200 return IIO_VAL_INT;1201 default:1202 return -EINVAL;1203 }1204 }1205 break;1206 case IIO_EV_INFO_PERIOD:1207 if (chan->type == IIO_INTENSITY) {1208 time = chip->settings.als_time;1209 persistence = chip->settings.als_persistence;1210 1211 /* ALS filter values are 1, 2, 3, 5, 10, 15, ..., 60 */1212 if (persistence > 3)1213 persistence = (persistence - 3) * 5;1214 } else {1215 time = chip->settings.prox_time;1216 persistence = chip->settings.prox_persistence;1217 }1218 1219 filter_delay = persistence * (256 - time) *1220 tsl2772_int_time_avail[chip->id][3];1221 1222 *val = filter_delay / 1000000;1223 *val2 = filter_delay % 1000000;1224 return IIO_VAL_INT_PLUS_MICRO;1225 default:1226 return -EINVAL;1227 }1228}1229 1230static int tsl2772_read_raw(struct iio_dev *indio_dev,1231 struct iio_chan_spec const *chan,1232 int *val,1233 int *val2,1234 long mask)1235{1236 struct tsl2772_chip *chip = iio_priv(indio_dev);1237 1238 switch (mask) {1239 case IIO_CHAN_INFO_PROCESSED:1240 switch (chan->type) {1241 case IIO_LIGHT:1242 tsl2772_get_lux(indio_dev);1243 *val = chip->als_cur_info.lux;1244 return IIO_VAL_INT;1245 default:1246 return -EINVAL;1247 }1248 case IIO_CHAN_INFO_RAW:1249 switch (chan->type) {1250 case IIO_INTENSITY:1251 tsl2772_get_lux(indio_dev);1252 if (chan->channel == 0)1253 *val = chip->als_cur_info.als_ch0;1254 else1255 *val = chip->als_cur_info.als_ch1;1256 return IIO_VAL_INT;1257 case IIO_PROXIMITY:1258 tsl2772_get_prox(indio_dev);1259 *val = chip->prox_data;1260 return IIO_VAL_INT;1261 default:1262 return -EINVAL;1263 }1264 break;1265 case IIO_CHAN_INFO_CALIBSCALE:1266 if (chan->type == IIO_LIGHT)1267 *val = tsl2772_als_gain[chip->settings.als_gain];1268 else1269 *val = tsl2772_prox_gain[chip->settings.prox_gain];1270 return IIO_VAL_INT;1271 case IIO_CHAN_INFO_CALIBBIAS:1272 *val = chip->settings.als_gain_trim;1273 return IIO_VAL_INT;1274 case IIO_CHAN_INFO_INT_TIME:1275 *val = 0;1276 *val2 = (256 - chip->settings.als_time) *1277 tsl2772_int_time_avail[chip->id][3];1278 return IIO_VAL_INT_PLUS_MICRO;1279 default:1280 return -EINVAL;1281 }1282}1283 1284static int tsl2772_write_raw(struct iio_dev *indio_dev,1285 struct iio_chan_spec const *chan,1286 int val,1287 int val2,1288 long mask)1289{1290 struct tsl2772_chip *chip = iio_priv(indio_dev);1291 1292 switch (mask) {1293 case IIO_CHAN_INFO_CALIBSCALE:1294 if (chan->type == IIO_INTENSITY) {1295 switch (val) {1296 case 1:1297 chip->settings.als_gain = 0;1298 break;1299 case 8:1300 chip->settings.als_gain = 1;1301 break;1302 case 16:1303 chip->settings.als_gain = 2;1304 break;1305 case 120:1306 chip->settings.als_gain = 3;1307 break;1308 default:1309 return -EINVAL;1310 }1311 } else {1312 switch (val) {1313 case 1:1314 chip->settings.prox_gain = 0;1315 break;1316 case 2:1317 chip->settings.prox_gain = 1;1318 break;1319 case 4:1320 chip->settings.prox_gain = 2;1321 break;1322 case 8:1323 chip->settings.prox_gain = 3;1324 break;1325 default:1326 return -EINVAL;1327 }1328 }1329 break;1330 case IIO_CHAN_INFO_CALIBBIAS:1331 if (val < TSL2772_ALS_GAIN_TRIM_MIN ||1332 val > TSL2772_ALS_GAIN_TRIM_MAX)1333 return -EINVAL;1334 1335 chip->settings.als_gain_trim = val;1336 break;1337 case IIO_CHAN_INFO_INT_TIME:1338 if (val != 0 || val2 < tsl2772_int_time_avail[chip->id][1] ||1339 val2 > tsl2772_int_time_avail[chip->id][5])1340 return -EINVAL;1341 1342 chip->settings.als_time = 256 -1343 (val2 / tsl2772_int_time_avail[chip->id][3]);1344 break;1345 default:1346 return -EINVAL;1347 }1348 1349 return tsl2772_invoke_change(indio_dev);1350}1351 1352static DEVICE_ATTR_RW(in_illuminance0_target_input);1353 1354static DEVICE_ATTR_WO(in_illuminance0_calibrate);1355 1356static DEVICE_ATTR_WO(in_proximity0_calibrate);1357 1358static DEVICE_ATTR_RW(in_illuminance0_lux_table);1359 1360/* Use the default register values to identify the Taos device */1361static int tsl2772_device_id_verif(int id, int target)1362{1363 switch (target) {1364 case tsl2571:1365 case tsl2671:1366 case tsl2771:1367 return (id & 0xf0) == TRITON_ID;1368 case tmd2671:1369 case tmd2771:1370 return (id & 0xf0) == HALIBUT_ID;1371 case tsl2572:1372 case tsl2672:1373 case tmd2672:1374 case tsl2772:1375 case tmd2772:1376 case apds9930:1377 return (id & 0xf0) == SWORDFISH_ID;1378 }1379 1380 return -EINVAL;1381}1382 1383static irqreturn_t tsl2772_event_handler(int irq, void *private)1384{1385 struct iio_dev *indio_dev = private;1386 struct tsl2772_chip *chip = iio_priv(indio_dev);1387 s64 timestamp = iio_get_time_ns(indio_dev);1388 int ret;1389 1390 ret = tsl2772_read_status(chip);1391 if (ret < 0)1392 return IRQ_HANDLED;1393 1394 /* What type of interrupt do we need to process */1395 if (ret & TSL2772_STA_PRX_INTR) {1396 iio_push_event(indio_dev,1397 IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY,1398 0,1399 IIO_EV_TYPE_THRESH,1400 IIO_EV_DIR_EITHER),1401 timestamp);1402 }1403 1404 if (ret & TSL2772_STA_ALS_INTR) {1405 iio_push_event(indio_dev,1406 IIO_UNMOD_EVENT_CODE(IIO_LIGHT,1407 0,1408 IIO_EV_TYPE_THRESH,1409 IIO_EV_DIR_EITHER),1410 timestamp);1411 }1412 1413 ret = i2c_smbus_write_byte(chip->client,1414 TSL2772_CMD_REG | TSL2772_CMD_SPL_FN |1415 TSL2772_CMD_PROXALS_INT_CLR);1416 if (ret < 0)1417 dev_err(&chip->client->dev,1418 "%s: failed to clear interrupt status: %d\n",1419 __func__, ret);1420 1421 return IRQ_HANDLED;1422}1423 1424static struct attribute *tsl2772_ALS_device_attrs[] = {1425 &dev_attr_in_illuminance0_target_input.attr,1426 &dev_attr_in_illuminance0_calibrate.attr,1427 &dev_attr_in_illuminance0_lux_table.attr,1428 NULL1429};1430 1431static struct attribute *tsl2772_PRX_device_attrs[] = {1432 &dev_attr_in_proximity0_calibrate.attr,1433 NULL1434};1435 1436static struct attribute *tsl2772_ALSPRX_device_attrs[] = {1437 &dev_attr_in_illuminance0_target_input.attr,1438 &dev_attr_in_illuminance0_calibrate.attr,1439 &dev_attr_in_illuminance0_lux_table.attr,1440 NULL1441};1442 1443static struct attribute *tsl2772_PRX2_device_attrs[] = {1444 &dev_attr_in_proximity0_calibrate.attr,1445 NULL1446};1447 1448static struct attribute *tsl2772_ALSPRX2_device_attrs[] = {1449 &dev_attr_in_illuminance0_target_input.attr,1450 &dev_attr_in_illuminance0_calibrate.attr,1451 &dev_attr_in_illuminance0_lux_table.attr,1452 &dev_attr_in_proximity0_calibrate.attr,1453 NULL1454};1455 1456static const struct attribute_group tsl2772_device_attr_group_tbl[] = {1457 [ALS] = {1458 .attrs = tsl2772_ALS_device_attrs,1459 },1460 [PRX] = {1461 .attrs = tsl2772_PRX_device_attrs,1462 },1463 [ALSPRX] = {1464 .attrs = tsl2772_ALSPRX_device_attrs,1465 },1466 [PRX2] = {1467 .attrs = tsl2772_PRX2_device_attrs,1468 },1469 [ALSPRX2] = {1470 .attrs = tsl2772_ALSPRX2_device_attrs,1471 },1472};1473 1474#define TSL2772_DEVICE_INFO(type)[type] = \1475 { \1476 .attrs = &tsl2772_device_attr_group_tbl[type], \1477 .read_raw = &tsl2772_read_raw, \1478 .read_avail = &tsl2772_read_avail, \1479 .write_raw = &tsl2772_write_raw, \1480 .read_event_value = &tsl2772_read_event_value, \1481 .write_event_value = &tsl2772_write_event_value, \1482 .read_event_config = &tsl2772_read_interrupt_config, \1483 .write_event_config = &tsl2772_write_interrupt_config, \1484 }1485 1486static const struct iio_info tsl2772_device_info[] = {1487 TSL2772_DEVICE_INFO(ALS),1488 TSL2772_DEVICE_INFO(PRX),1489 TSL2772_DEVICE_INFO(ALSPRX),1490 TSL2772_DEVICE_INFO(PRX2),1491 TSL2772_DEVICE_INFO(ALSPRX2),1492};1493 1494static const struct iio_event_spec tsl2772_events[] = {1495 {1496 .type = IIO_EV_TYPE_THRESH,1497 .dir = IIO_EV_DIR_RISING,1498 .mask_separate = BIT(IIO_EV_INFO_VALUE),1499 }, {1500 .type = IIO_EV_TYPE_THRESH,1501 .dir = IIO_EV_DIR_FALLING,1502 .mask_separate = BIT(IIO_EV_INFO_VALUE),1503 }, {1504 .type = IIO_EV_TYPE_THRESH,1505 .dir = IIO_EV_DIR_EITHER,1506 .mask_separate = BIT(IIO_EV_INFO_PERIOD) |1507 BIT(IIO_EV_INFO_ENABLE),1508 },1509};1510 1511static const struct tsl2772_chip_info tsl2772_chip_info_tbl[] = {1512 [ALS] = {1513 .channel_with_events = {1514 {1515 .type = IIO_LIGHT,1516 .indexed = 1,1517 .channel = 0,1518 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),1519 }, {1520 .type = IIO_INTENSITY,1521 .indexed = 1,1522 .channel = 0,1523 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |1524 BIT(IIO_CHAN_INFO_INT_TIME) |1525 BIT(IIO_CHAN_INFO_CALIBSCALE) |1526 BIT(IIO_CHAN_INFO_CALIBBIAS),1527 .info_mask_separate_available =1528 BIT(IIO_CHAN_INFO_INT_TIME) |1529 BIT(IIO_CHAN_INFO_CALIBSCALE),1530 .event_spec = tsl2772_events,1531 .num_event_specs = ARRAY_SIZE(tsl2772_events),1532 }, {1533 .type = IIO_INTENSITY,1534 .indexed = 1,1535 .channel = 1,1536 },1537 },1538 .channel_without_events = {1539 {1540 .type = IIO_LIGHT,1541 .indexed = 1,1542 .channel = 0,1543 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),1544 }, {1545 .type = IIO_INTENSITY,1546 .indexed = 1,1547 .channel = 0,1548 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |1549 BIT(IIO_CHAN_INFO_INT_TIME) |1550 BIT(IIO_CHAN_INFO_CALIBSCALE) |1551 BIT(IIO_CHAN_INFO_CALIBBIAS),1552 .info_mask_separate_available =1553 BIT(IIO_CHAN_INFO_INT_TIME) |1554 BIT(IIO_CHAN_INFO_CALIBSCALE),1555 }, {1556 .type = IIO_INTENSITY,1557 .indexed = 1,1558 .channel = 1,1559 },1560 },1561 .chan_table_elements = 3,1562 .info = &tsl2772_device_info[ALS],1563 },1564 [PRX] = {1565 .channel_with_events = {1566 {1567 .type = IIO_PROXIMITY,1568 .indexed = 1,1569 .channel = 0,1570 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),1571 .event_spec = tsl2772_events,1572 .num_event_specs = ARRAY_SIZE(tsl2772_events),1573 },1574 },1575 .channel_without_events = {1576 {1577 .type = IIO_PROXIMITY,1578 .indexed = 1,1579 .channel = 0,1580 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),1581 },1582 },1583 .chan_table_elements = 1,1584 .info = &tsl2772_device_info[PRX],1585 },1586 [ALSPRX] = {1587 .channel_with_events = {1588 {1589 .type = IIO_LIGHT,1590 .indexed = 1,1591 .channel = 0,1592 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),1593 }, {1594 .type = IIO_INTENSITY,1595 .indexed = 1,1596 .channel = 0,1597 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |1598 BIT(IIO_CHAN_INFO_INT_TIME) |1599 BIT(IIO_CHAN_INFO_CALIBSCALE) |1600 BIT(IIO_CHAN_INFO_CALIBBIAS),1601 .info_mask_separate_available =1602 BIT(IIO_CHAN_INFO_INT_TIME) |1603 BIT(IIO_CHAN_INFO_CALIBSCALE),1604 .event_spec = tsl2772_events,1605 .num_event_specs = ARRAY_SIZE(tsl2772_events),1606 }, {1607 .type = IIO_INTENSITY,1608 .indexed = 1,1609 .channel = 1,1610 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),1611 }, {1612 .type = IIO_PROXIMITY,1613 .indexed = 1,1614 .channel = 0,1615 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),1616 .event_spec = tsl2772_events,1617 .num_event_specs = ARRAY_SIZE(tsl2772_events),1618 },1619 },1620 .channel_without_events = {1621 {1622 .type = IIO_LIGHT,1623 .indexed = 1,1624 .channel = 0,1625 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),1626 }, {1627 .type = IIO_INTENSITY,1628 .indexed = 1,1629 .channel = 0,1630 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |1631 BIT(IIO_CHAN_INFO_INT_TIME) |1632 BIT(IIO_CHAN_INFO_CALIBSCALE) |1633 BIT(IIO_CHAN_INFO_CALIBBIAS),1634 .info_mask_separate_available =1635 BIT(IIO_CHAN_INFO_INT_TIME) |1636 BIT(IIO_CHAN_INFO_CALIBSCALE),1637 }, {1638 .type = IIO_INTENSITY,1639 .indexed = 1,1640 .channel = 1,1641 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),1642 }, {1643 .type = IIO_PROXIMITY,1644 .indexed = 1,1645 .channel = 0,1646 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),1647 },1648 },1649 .chan_table_elements = 4,1650 .info = &tsl2772_device_info[ALSPRX],1651 },1652 [PRX2] = {1653 .channel_with_events = {1654 {1655 .type = IIO_PROXIMITY,1656 .indexed = 1,1657 .channel = 0,1658 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |1659 BIT(IIO_CHAN_INFO_CALIBSCALE),1660 .info_mask_separate_available =1661 BIT(IIO_CHAN_INFO_CALIBSCALE),1662 .event_spec = tsl2772_events,1663 .num_event_specs = ARRAY_SIZE(tsl2772_events),1664 },1665 },1666 .channel_without_events = {1667 {1668 .type = IIO_PROXIMITY,1669 .indexed = 1,1670 .channel = 0,1671 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |1672 BIT(IIO_CHAN_INFO_CALIBSCALE),1673 .info_mask_separate_available =1674 BIT(IIO_CHAN_INFO_CALIBSCALE),1675 },1676 },1677 .chan_table_elements = 1,1678 .info = &tsl2772_device_info[PRX2],1679 },1680 [ALSPRX2] = {1681 .channel_with_events = {1682 {1683 .type = IIO_LIGHT,1684 .indexed = 1,1685 .channel = 0,1686 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),1687 }, {1688 .type = IIO_INTENSITY,1689 .indexed = 1,1690 .channel = 0,1691 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |1692 BIT(IIO_CHAN_INFO_INT_TIME) |1693 BIT(IIO_CHAN_INFO_CALIBSCALE) |1694 BIT(IIO_CHAN_INFO_CALIBBIAS),1695 .info_mask_separate_available =1696 BIT(IIO_CHAN_INFO_INT_TIME) |1697 BIT(IIO_CHAN_INFO_CALIBSCALE),1698 .event_spec = tsl2772_events,1699 .num_event_specs = ARRAY_SIZE(tsl2772_events),1700 }, {1701 .type = IIO_INTENSITY,1702 .indexed = 1,1703 .channel = 1,1704 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),1705 }, {1706 .type = IIO_PROXIMITY,1707 .indexed = 1,1708 .channel = 0,1709 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |1710 BIT(IIO_CHAN_INFO_CALIBSCALE),1711 .info_mask_separate_available =1712 BIT(IIO_CHAN_INFO_CALIBSCALE),1713 .event_spec = tsl2772_events,1714 .num_event_specs = ARRAY_SIZE(tsl2772_events),1715 },1716 },1717 .channel_without_events = {1718 {1719 .type = IIO_LIGHT,1720 .indexed = 1,1721 .channel = 0,1722 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),1723 }, {1724 .type = IIO_INTENSITY,1725 .indexed = 1,1726 .channel = 0,1727 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |1728 BIT(IIO_CHAN_INFO_INT_TIME) |1729 BIT(IIO_CHAN_INFO_CALIBSCALE) |1730 BIT(IIO_CHAN_INFO_CALIBBIAS),1731 .info_mask_separate_available =1732 BIT(IIO_CHAN_INFO_INT_TIME) |1733 BIT(IIO_CHAN_INFO_CALIBSCALE),1734 }, {1735 .type = IIO_INTENSITY,1736 .indexed = 1,1737 .channel = 1,1738 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),1739 }, {1740 .type = IIO_PROXIMITY,1741 .indexed = 1,1742 .channel = 0,1743 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |1744 BIT(IIO_CHAN_INFO_CALIBSCALE),1745 .info_mask_separate_available =1746 BIT(IIO_CHAN_INFO_CALIBSCALE),1747 },1748 },1749 .chan_table_elements = 4,1750 .info = &tsl2772_device_info[ALSPRX2],1751 },1752};1753 1754static int tsl2772_probe(struct i2c_client *clientp)1755{1756 const struct i2c_device_id *id = i2c_client_get_device_id(clientp);1757 struct iio_dev *indio_dev;1758 struct tsl2772_chip *chip;1759 int ret;1760 1761 indio_dev = devm_iio_device_alloc(&clientp->dev, sizeof(*chip));1762 if (!indio_dev)1763 return -ENOMEM;1764 1765 chip = iio_priv(indio_dev);1766 chip->client = clientp;1767 i2c_set_clientdata(clientp, indio_dev);1768 1769 chip->supplies[TSL2772_SUPPLY_VDD].supply = "vdd";1770 chip->supplies[TSL2772_SUPPLY_VDDIO].supply = "vddio";1771 1772 ret = devm_regulator_bulk_get(&clientp->dev,1773 ARRAY_SIZE(chip->supplies),1774 chip->supplies);1775 if (ret < 0)1776 return dev_err_probe(&clientp->dev, ret, "Failed to get regulators\n");1777 1778 ret = regulator_bulk_enable(ARRAY_SIZE(chip->supplies), chip->supplies);1779 if (ret < 0) {1780 dev_err(&clientp->dev, "Failed to enable regulators: %d\n",1781 ret);1782 return ret;1783 }1784 1785 ret = devm_add_action_or_reset(&clientp->dev,1786 tsl2772_disable_regulators_action,1787 chip);1788 if (ret < 0) {1789 dev_err(&clientp->dev, "Failed to setup regulator cleanup action %d\n",1790 ret);1791 return ret;1792 }1793 1794 usleep_range(TSL2772_BOOT_MIN_SLEEP_TIME, TSL2772_BOOT_MAX_SLEEP_TIME);1795 1796 ret = i2c_smbus_read_byte_data(chip->client,1797 TSL2772_CMD_REG | TSL2772_CHIPID);1798 if (ret < 0)1799 return ret;1800 1801 if (tsl2772_device_id_verif(ret, id->driver_data) <= 0) {1802 dev_info(&chip->client->dev,1803 "%s: i2c device found does not match expected id\n",1804 __func__);1805 return -EINVAL;1806 }1807 1808 ret = i2c_smbus_write_byte(clientp, TSL2772_CMD_REG | TSL2772_CNTRL);1809 if (ret < 0) {1810 dev_err(&clientp->dev,1811 "%s: Failed to write to CMD register: %d\n",1812 __func__, ret);1813 return ret;1814 }1815 1816 mutex_init(&chip->als_mutex);1817 mutex_init(&chip->prox_mutex);1818 1819 chip->tsl2772_chip_status = TSL2772_CHIP_UNKNOWN;1820 chip->pdata = dev_get_platdata(&clientp->dev);1821 chip->id = id->driver_data;1822 chip->chip_info =1823 &tsl2772_chip_info_tbl[device_channel_config[id->driver_data]];1824 1825 indio_dev->info = chip->chip_info->info;1826 indio_dev->modes = INDIO_DIRECT_MODE;1827 indio_dev->name = chip->client->name;1828 indio_dev->num_channels = chip->chip_info->chan_table_elements;1829 1830 if (clientp->irq) {1831 indio_dev->channels = chip->chip_info->channel_with_events;1832 1833 ret = devm_request_threaded_irq(&clientp->dev, clientp->irq,1834 NULL,1835 &tsl2772_event_handler,1836 IRQF_TRIGGER_FALLING |1837 IRQF_ONESHOT,1838 "TSL2772_event",1839 indio_dev);1840 if (ret) {1841 dev_err(&clientp->dev,1842 "%s: irq request failed\n", __func__);1843 return ret;1844 }1845 } else {1846 indio_dev->channels = chip->chip_info->channel_without_events;1847 }1848 1849 tsl2772_defaults(chip);1850 ret = tsl2772_chip_on(indio_dev);1851 if (ret < 0)1852 return ret;1853 1854 ret = devm_add_action_or_reset(&clientp->dev,1855 tsl2772_chip_off_action,1856 indio_dev);1857 if (ret < 0)1858 return ret;1859 1860 return devm_iio_device_register(&clientp->dev, indio_dev);1861}1862 1863static int tsl2772_suspend(struct device *dev)1864{1865 struct iio_dev *indio_dev = dev_get_drvdata(dev);1866 struct tsl2772_chip *chip = iio_priv(indio_dev);1867 int ret;1868 1869 ret = tsl2772_chip_off(indio_dev);1870 regulator_bulk_disable(ARRAY_SIZE(chip->supplies), chip->supplies);1871 1872 return ret;1873}1874 1875static int tsl2772_resume(struct device *dev)1876{1877 struct iio_dev *indio_dev = dev_get_drvdata(dev);1878 struct tsl2772_chip *chip = iio_priv(indio_dev);1879 int ret;1880 1881 ret = regulator_bulk_enable(ARRAY_SIZE(chip->supplies), chip->supplies);1882 if (ret < 0)1883 return ret;1884 1885 usleep_range(TSL2772_BOOT_MIN_SLEEP_TIME, TSL2772_BOOT_MAX_SLEEP_TIME);1886 1887 return tsl2772_chip_on(indio_dev);1888}1889 1890static const struct i2c_device_id tsl2772_idtable[] = {1891 { "tsl2571", tsl2571 },1892 { "tsl2671", tsl2671 },1893 { "tmd2671", tmd2671 },1894 { "tsl2771", tsl2771 },1895 { "tmd2771", tmd2771 },1896 { "tsl2572", tsl2572 },1897 { "tsl2672", tsl2672 },1898 { "tmd2672", tmd2672 },1899 { "tsl2772", tsl2772 },1900 { "tmd2772", tmd2772 },1901 { "apds9930", apds9930 },1902 {}1903};1904 1905MODULE_DEVICE_TABLE(i2c, tsl2772_idtable);1906 1907static const struct of_device_id tsl2772_of_match[] = {1908 { .compatible = "amstaos,tsl2571" },1909 { .compatible = "amstaos,tsl2671" },1910 { .compatible = "amstaos,tmd2671" },1911 { .compatible = "amstaos,tsl2771" },1912 { .compatible = "amstaos,tmd2771" },1913 { .compatible = "amstaos,tsl2572" },1914 { .compatible = "amstaos,tsl2672" },1915 { .compatible = "amstaos,tmd2672" },1916 { .compatible = "amstaos,tsl2772" },1917 { .compatible = "amstaos,tmd2772" },1918 { .compatible = "avago,apds9930" },1919 {}1920};1921MODULE_DEVICE_TABLE(of, tsl2772_of_match);1922 1923static const struct dev_pm_ops tsl2772_pm_ops = {1924 .suspend = tsl2772_suspend,1925 .resume = tsl2772_resume,1926};1927 1928static struct i2c_driver tsl2772_driver = {1929 .driver = {1930 .name = "tsl2772",1931 .of_match_table = tsl2772_of_match,1932 .pm = &tsl2772_pm_ops,1933 },1934 .id_table = tsl2772_idtable,1935 .probe = tsl2772_probe,1936};1937 1938module_i2c_driver(tsl2772_driver);1939 1940MODULE_AUTHOR("J. August Brenner <Jon.Brenner@ams.com>");1941MODULE_AUTHOR("Brian Masney <masneyb@onstation.org>");1942MODULE_DESCRIPTION("TAOS tsl2772 ambient and proximity light sensor driver");1943MODULE_LICENSE("GPL");1944