1655 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Support for Lite-On LTR501 and similar ambient light and proximity sensors.4 *5 * Copyright 2014 Peter Meerwald <pmeerw@pmeerw.net>6 *7 * 7-bit I2C slave address 0x238 *9 * TODO: IR LED characteristics10 */11 12#include <linux/module.h>13#include <linux/mod_devicetable.h>14#include <linux/i2c.h>15#include <linux/err.h>16#include <linux/delay.h>17#include <linux/regmap.h>18#include <linux/acpi.h>19#include <linux/regulator/consumer.h>20 21#include <linux/iio/iio.h>22#include <linux/iio/events.h>23#include <linux/iio/sysfs.h>24#include <linux/iio/trigger_consumer.h>25#include <linux/iio/buffer.h>26#include <linux/iio/triggered_buffer.h>27 28#define LTR501_DRV_NAME "ltr501"29 30#define LTR501_ALS_CONTR 0x80 /* ALS operation mode, SW reset */31#define LTR501_PS_CONTR 0x81 /* PS operation mode */32#define LTR501_PS_MEAS_RATE 0x84 /* measurement rate*/33#define LTR501_ALS_MEAS_RATE 0x85 /* ALS integ time, measurement rate*/34#define LTR501_PART_ID 0x8635#define LTR501_MANUFAC_ID 0x8736#define LTR501_ALS_DATA1 0x88 /* 16-bit, little endian */37#define LTR501_ALS_DATA1_UPPER 0x89 /* upper 8 bits of LTR501_ALS_DATA1 */38#define LTR501_ALS_DATA0 0x8a /* 16-bit, little endian */39#define LTR501_ALS_DATA0_UPPER 0x8b /* upper 8 bits of LTR501_ALS_DATA0 */40#define LTR501_ALS_PS_STATUS 0x8c41#define LTR501_PS_DATA 0x8d /* 16-bit, little endian */42#define LTR501_PS_DATA_UPPER 0x8e /* upper 8 bits of LTR501_PS_DATA */43#define LTR501_INTR 0x8f /* output mode, polarity, mode */44#define LTR501_PS_THRESH_UP 0x90 /* 11 bit, ps upper threshold */45#define LTR501_PS_THRESH_LOW 0x92 /* 11 bit, ps lower threshold */46#define LTR501_ALS_THRESH_UP 0x97 /* 16 bit, ALS upper threshold */47#define LTR501_ALS_THRESH_LOW 0x99 /* 16 bit, ALS lower threshold */48#define LTR501_INTR_PRST 0x9e /* ps thresh, als thresh */49#define LTR501_MAX_REG 0x9f50 51#define LTR501_ALS_CONTR_SW_RESET BIT(2)52#define LTR501_CONTR_PS_GAIN_MASK (BIT(3) | BIT(2))53#define LTR501_CONTR_PS_GAIN_SHIFT 254#define LTR501_CONTR_ALS_GAIN_MASK BIT(3)55#define LTR501_CONTR_ACTIVE BIT(1)56 57#define LTR501_STATUS_ALS_INTR BIT(3)58#define LTR501_STATUS_ALS_RDY BIT(2)59#define LTR501_STATUS_PS_INTR BIT(1)60#define LTR501_STATUS_PS_RDY BIT(0)61 62#define LTR501_PS_DATA_MASK 0x7ff63#define LTR501_PS_THRESH_MASK 0x7ff64#define LTR501_ALS_THRESH_MASK 0xffff65 66#define LTR501_ALS_DEF_PERIOD 50000067#define LTR501_PS_DEF_PERIOD 10000068 69#define LTR501_REGMAP_NAME "ltr501_regmap"70 71#define LTR501_LUX_CONV(vis_coeff, vis_data, ir_coeff, ir_data) \72 ((vis_coeff * vis_data) - (ir_coeff * ir_data))73 74static const int int_time_mapping[] = {100000, 50000, 200000, 400000};75 76static const struct reg_field reg_field_it =77 REG_FIELD(LTR501_ALS_MEAS_RATE, 3, 4);78static const struct reg_field reg_field_als_intr =79 REG_FIELD(LTR501_INTR, 1, 1);80static const struct reg_field reg_field_ps_intr =81 REG_FIELD(LTR501_INTR, 0, 0);82static const struct reg_field reg_field_als_rate =83 REG_FIELD(LTR501_ALS_MEAS_RATE, 0, 2);84static const struct reg_field reg_field_ps_rate =85 REG_FIELD(LTR501_PS_MEAS_RATE, 0, 3);86static const struct reg_field reg_field_als_prst =87 REG_FIELD(LTR501_INTR_PRST, 0, 3);88static const struct reg_field reg_field_ps_prst =89 REG_FIELD(LTR501_INTR_PRST, 4, 7);90 91struct ltr501_samp_table {92 int freq_val; /* repetition frequency in micro HZ*/93 int time_val; /* repetition rate in micro seconds */94};95 96#define LTR501_RESERVED_GAIN -197 98enum {99 ltr501 = 0,100 ltr559,101 ltr301,102 ltr303,103};104 105struct ltr501_gain {106 int scale;107 int uscale;108};109 110static const struct ltr501_gain ltr501_als_gain_tbl[] = {111 {1, 0},112 {0, 5000},113};114 115static const struct ltr501_gain ltr559_als_gain_tbl[] = {116 {1, 0},117 {0, 500000},118 {0, 250000},119 {0, 125000},120 {LTR501_RESERVED_GAIN, LTR501_RESERVED_GAIN},121 {LTR501_RESERVED_GAIN, LTR501_RESERVED_GAIN},122 {0, 20000},123 {0, 10000},124};125 126static const struct ltr501_gain ltr501_ps_gain_tbl[] = {127 {1, 0},128 {0, 250000},129 {0, 125000},130 {0, 62500},131};132 133static const struct ltr501_gain ltr559_ps_gain_tbl[] = {134 {0, 62500}, /* x16 gain */135 {0, 31250}, /* x32 gain */136 {0, 15625}, /* bits X1 are for x64 gain */137 {0, 15624},138};139 140struct ltr501_chip_info {141 u8 partid;142 const struct ltr501_gain *als_gain;143 int als_gain_tbl_size;144 const struct ltr501_gain *ps_gain;145 int ps_gain_tbl_size;146 u8 als_mode_active;147 u8 als_gain_mask;148 u8 als_gain_shift;149 struct iio_chan_spec const *channels;150 const int no_channels;151 const struct iio_info *info;152 const struct iio_info *info_no_irq;153};154 155struct ltr501_data {156 struct i2c_client *client;157 struct mutex lock_als, lock_ps;158 const struct ltr501_chip_info *chip_info;159 u8 als_contr, ps_contr;160 int als_period, ps_period; /* period in micro seconds */161 struct regmap *regmap;162 struct regmap_field *reg_it;163 struct regmap_field *reg_als_intr;164 struct regmap_field *reg_ps_intr;165 struct regmap_field *reg_als_rate;166 struct regmap_field *reg_ps_rate;167 struct regmap_field *reg_als_prst;168 struct regmap_field *reg_ps_prst;169 uint32_t near_level;170};171 172static const struct ltr501_samp_table ltr501_als_samp_table[] = {173 {20000000, 50000}, {10000000, 100000},174 {5000000, 200000}, {2000000, 500000},175 {1000000, 1000000}, {500000, 2000000},176 {500000, 2000000}, {500000, 2000000}177};178 179static const struct ltr501_samp_table ltr501_ps_samp_table[] = {180 {20000000, 50000}, {14285714, 70000},181 {10000000, 100000}, {5000000, 200000},182 {2000000, 500000}, {1000000, 1000000},183 {500000, 2000000}, {500000, 2000000},184 {500000, 2000000}185};186 187static int ltr501_match_samp_freq(const struct ltr501_samp_table *tab,188 int len, int val, int val2)189{190 int i, freq;191 192 freq = val * 1000000 + val2;193 194 for (i = 0; i < len; i++) {195 if (tab[i].freq_val == freq)196 return i;197 }198 199 return -EINVAL;200}201 202static int ltr501_als_read_samp_freq(const struct ltr501_data *data,203 int *val, int *val2)204{205 int ret, i;206 207 ret = regmap_field_read(data->reg_als_rate, &i);208 if (ret < 0)209 return ret;210 211 if (i < 0 || i >= ARRAY_SIZE(ltr501_als_samp_table))212 return -EINVAL;213 214 *val = ltr501_als_samp_table[i].freq_val / 1000000;215 *val2 = ltr501_als_samp_table[i].freq_val % 1000000;216 217 return IIO_VAL_INT_PLUS_MICRO;218}219 220static int ltr501_ps_read_samp_freq(const struct ltr501_data *data,221 int *val, int *val2)222{223 int ret, i;224 225 ret = regmap_field_read(data->reg_ps_rate, &i);226 if (ret < 0)227 return ret;228 229 if (i < 0 || i >= ARRAY_SIZE(ltr501_ps_samp_table))230 return -EINVAL;231 232 *val = ltr501_ps_samp_table[i].freq_val / 1000000;233 *val2 = ltr501_ps_samp_table[i].freq_val % 1000000;234 235 return IIO_VAL_INT_PLUS_MICRO;236}237 238static int ltr501_als_write_samp_freq(struct ltr501_data *data,239 int val, int val2)240{241 int i, ret;242 243 i = ltr501_match_samp_freq(ltr501_als_samp_table,244 ARRAY_SIZE(ltr501_als_samp_table),245 val, val2);246 247 if (i < 0)248 return i;249 250 mutex_lock(&data->lock_als);251 ret = regmap_field_write(data->reg_als_rate, i);252 mutex_unlock(&data->lock_als);253 254 return ret;255}256 257static int ltr501_ps_write_samp_freq(struct ltr501_data *data,258 int val, int val2)259{260 int i, ret;261 262 i = ltr501_match_samp_freq(ltr501_ps_samp_table,263 ARRAY_SIZE(ltr501_ps_samp_table),264 val, val2);265 266 if (i < 0)267 return i;268 269 mutex_lock(&data->lock_ps);270 ret = regmap_field_write(data->reg_ps_rate, i);271 mutex_unlock(&data->lock_ps);272 273 return ret;274}275 276static int ltr501_als_read_samp_period(const struct ltr501_data *data, int *val)277{278 int ret, i;279 280 ret = regmap_field_read(data->reg_als_rate, &i);281 if (ret < 0)282 return ret;283 284 if (i < 0 || i >= ARRAY_SIZE(ltr501_als_samp_table))285 return -EINVAL;286 287 *val = ltr501_als_samp_table[i].time_val;288 289 return IIO_VAL_INT;290}291 292static int ltr501_ps_read_samp_period(const struct ltr501_data *data, int *val)293{294 int ret, i;295 296 ret = regmap_field_read(data->reg_ps_rate, &i);297 if (ret < 0)298 return ret;299 300 if (i < 0 || i >= ARRAY_SIZE(ltr501_ps_samp_table))301 return -EINVAL;302 303 *val = ltr501_ps_samp_table[i].time_val;304 305 return IIO_VAL_INT;306}307 308/* IR and visible spectrum coeff's are given in data sheet */309static unsigned long ltr501_calculate_lux(u16 vis_data, u16 ir_data)310{311 unsigned long ratio, lux;312 313 if (vis_data == 0)314 return 0;315 316 /* multiply numerator by 100 to avoid handling ratio < 1 */317 ratio = DIV_ROUND_UP(ir_data * 100, ir_data + vis_data);318 319 if (ratio < 45)320 lux = LTR501_LUX_CONV(1774, vis_data, -1105, ir_data);321 else if (ratio >= 45 && ratio < 64)322 lux = LTR501_LUX_CONV(3772, vis_data, 1336, ir_data);323 else if (ratio >= 64 && ratio < 85)324 lux = LTR501_LUX_CONV(1690, vis_data, 169, ir_data);325 else326 lux = 0;327 328 return lux / 1000;329}330 331static int ltr501_drdy(const struct ltr501_data *data, u8 drdy_mask)332{333 int tries = 100;334 int ret, status;335 336 while (tries--) {337 ret = regmap_read(data->regmap, LTR501_ALS_PS_STATUS, &status);338 if (ret < 0)339 return ret;340 if ((status & drdy_mask) == drdy_mask)341 return 0;342 msleep(25);343 }344 345 dev_err(&data->client->dev, "ltr501_drdy() failed, data not ready\n");346 return -EIO;347}348 349static int ltr501_set_it_time(struct ltr501_data *data, int it)350{351 int ret, i, index = -1, status;352 353 for (i = 0; i < ARRAY_SIZE(int_time_mapping); i++) {354 if (int_time_mapping[i] == it) {355 index = i;356 break;357 }358 }359 /* Make sure integ time index is valid */360 if (index < 0)361 return -EINVAL;362 363 ret = regmap_read(data->regmap, LTR501_ALS_CONTR, &status);364 if (ret < 0)365 return ret;366 367 if (status & LTR501_CONTR_ALS_GAIN_MASK) {368 /*369 * 200 ms and 400 ms integ time can only be370 * used in dynamic range 1371 */372 if (index > 1)373 return -EINVAL;374 } else375 /* 50 ms integ time can only be used in dynamic range 2 */376 if (index == 1)377 return -EINVAL;378 379 return regmap_field_write(data->reg_it, index);380}381 382/* read int time in micro seconds */383static int ltr501_read_it_time(const struct ltr501_data *data,384 int *val, int *val2)385{386 int ret, index;387 388 ret = regmap_field_read(data->reg_it, &index);389 if (ret < 0)390 return ret;391 392 /* Make sure integ time index is valid */393 if (index < 0 || index >= ARRAY_SIZE(int_time_mapping))394 return -EINVAL;395 396 *val2 = int_time_mapping[index];397 *val = 0;398 399 return IIO_VAL_INT_PLUS_MICRO;400}401 402static int ltr501_read_als(const struct ltr501_data *data, __le16 buf[2])403{404 int ret;405 406 ret = ltr501_drdy(data, LTR501_STATUS_ALS_RDY);407 if (ret < 0)408 return ret;409 /* always read both ALS channels in given order */410 return regmap_bulk_read(data->regmap, LTR501_ALS_DATA1,411 buf, 2 * sizeof(__le16));412}413 414static int ltr501_read_ps(const struct ltr501_data *data)415{416 __le16 status;417 int ret;418 419 ret = ltr501_drdy(data, LTR501_STATUS_PS_RDY);420 if (ret < 0)421 return ret;422 423 ret = regmap_bulk_read(data->regmap, LTR501_PS_DATA,424 &status, sizeof(status));425 if (ret < 0)426 return ret;427 428 return le16_to_cpu(status);429}430 431static int ltr501_read_intr_prst(const struct ltr501_data *data,432 enum iio_chan_type type,433 int *val2)434{435 int ret, samp_period, prst;436 437 switch (type) {438 case IIO_INTENSITY:439 ret = regmap_field_read(data->reg_als_prst, &prst);440 if (ret < 0)441 return ret;442 443 ret = ltr501_als_read_samp_period(data, &samp_period);444 445 if (ret < 0)446 return ret;447 *val2 = samp_period * prst;448 return IIO_VAL_INT_PLUS_MICRO;449 case IIO_PROXIMITY:450 ret = regmap_field_read(data->reg_ps_prst, &prst);451 if (ret < 0)452 return ret;453 454 ret = ltr501_ps_read_samp_period(data, &samp_period);455 456 if (ret < 0)457 return ret;458 459 *val2 = samp_period * prst;460 return IIO_VAL_INT_PLUS_MICRO;461 default:462 return -EINVAL;463 }464 465 return -EINVAL;466}467 468static int ltr501_write_intr_prst(struct ltr501_data *data,469 enum iio_chan_type type,470 int val, int val2)471{472 int ret, samp_period, new_val;473 unsigned long period;474 475 if (val < 0 || val2 < 0)476 return -EINVAL;477 478 /* period in microseconds */479 period = ((val * 1000000) + val2);480 481 switch (type) {482 case IIO_INTENSITY:483 ret = ltr501_als_read_samp_period(data, &samp_period);484 if (ret < 0)485 return ret;486 487 /* period should be atleast equal to sampling period */488 if (period < samp_period)489 return -EINVAL;490 491 new_val = DIV_ROUND_UP(period, samp_period);492 if (new_val < 0 || new_val > 0x0f)493 return -EINVAL;494 495 mutex_lock(&data->lock_als);496 ret = regmap_field_write(data->reg_als_prst, new_val);497 mutex_unlock(&data->lock_als);498 if (ret >= 0)499 data->als_period = period;500 501 return ret;502 case IIO_PROXIMITY:503 ret = ltr501_ps_read_samp_period(data, &samp_period);504 if (ret < 0)505 return ret;506 507 /* period should be atleast equal to rate */508 if (period < samp_period)509 return -EINVAL;510 511 new_val = DIV_ROUND_UP(period, samp_period);512 if (new_val < 0 || new_val > 0x0f)513 return -EINVAL;514 515 mutex_lock(&data->lock_ps);516 ret = regmap_field_write(data->reg_ps_prst, new_val);517 mutex_unlock(&data->lock_ps);518 if (ret >= 0)519 data->ps_period = period;520 521 return ret;522 default:523 return -EINVAL;524 }525 526 return -EINVAL;527}528 529static ssize_t ltr501_read_near_level(struct iio_dev *indio_dev,530 uintptr_t priv,531 const struct iio_chan_spec *chan,532 char *buf)533{534 struct ltr501_data *data = iio_priv(indio_dev);535 536 return sprintf(buf, "%u\n", data->near_level);537}538 539static const struct iio_chan_spec_ext_info ltr501_ext_info[] = {540 {541 .name = "nearlevel",542 .shared = IIO_SEPARATE,543 .read = ltr501_read_near_level,544 },545 { /* sentinel */ }546};547 548static const struct iio_event_spec ltr501_als_event_spec[] = {549 {550 .type = IIO_EV_TYPE_THRESH,551 .dir = IIO_EV_DIR_RISING,552 .mask_separate = BIT(IIO_EV_INFO_VALUE),553 }, {554 .type = IIO_EV_TYPE_THRESH,555 .dir = IIO_EV_DIR_FALLING,556 .mask_separate = BIT(IIO_EV_INFO_VALUE),557 }, {558 .type = IIO_EV_TYPE_THRESH,559 .dir = IIO_EV_DIR_EITHER,560 .mask_separate = BIT(IIO_EV_INFO_ENABLE) |561 BIT(IIO_EV_INFO_PERIOD),562 },563 564};565 566static const struct iio_event_spec ltr501_pxs_event_spec[] = {567 {568 .type = IIO_EV_TYPE_THRESH,569 .dir = IIO_EV_DIR_RISING,570 .mask_separate = BIT(IIO_EV_INFO_VALUE),571 }, {572 .type = IIO_EV_TYPE_THRESH,573 .dir = IIO_EV_DIR_FALLING,574 .mask_separate = BIT(IIO_EV_INFO_VALUE),575 }, {576 .type = IIO_EV_TYPE_THRESH,577 .dir = IIO_EV_DIR_EITHER,578 .mask_separate = BIT(IIO_EV_INFO_ENABLE) |579 BIT(IIO_EV_INFO_PERIOD),580 },581};582 583#define LTR501_INTENSITY_CHANNEL(_idx, _addr, _mod, _shared, \584 _evspec, _evsize) { \585 .type = IIO_INTENSITY, \586 .modified = 1, \587 .address = (_addr), \588 .channel2 = (_mod), \589 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \590 .info_mask_shared_by_type = (_shared), \591 .scan_index = (_idx), \592 .scan_type = { \593 .sign = 'u', \594 .realbits = 16, \595 .storagebits = 16, \596 .endianness = IIO_CPU, \597 }, \598 .event_spec = _evspec,\599 .num_event_specs = _evsize,\600}601 602#define LTR501_LIGHT_CHANNEL() { \603 .type = IIO_LIGHT, \604 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), \605 .scan_index = -1, \606}607 608static const struct iio_chan_spec ltr501_channels[] = {609 LTR501_LIGHT_CHANNEL(),610 LTR501_INTENSITY_CHANNEL(0, LTR501_ALS_DATA0, IIO_MOD_LIGHT_BOTH, 0,611 ltr501_als_event_spec,612 ARRAY_SIZE(ltr501_als_event_spec)),613 LTR501_INTENSITY_CHANNEL(1, LTR501_ALS_DATA1, IIO_MOD_LIGHT_IR,614 BIT(IIO_CHAN_INFO_SCALE) |615 BIT(IIO_CHAN_INFO_INT_TIME) |616 BIT(IIO_CHAN_INFO_SAMP_FREQ),617 NULL, 0),618 {619 .type = IIO_PROXIMITY,620 .address = LTR501_PS_DATA,621 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |622 BIT(IIO_CHAN_INFO_SCALE),623 .scan_index = 2,624 .scan_type = {625 .sign = 'u',626 .realbits = 11,627 .storagebits = 16,628 .endianness = IIO_CPU,629 },630 .event_spec = ltr501_pxs_event_spec,631 .num_event_specs = ARRAY_SIZE(ltr501_pxs_event_spec),632 .ext_info = ltr501_ext_info,633 },634 IIO_CHAN_SOFT_TIMESTAMP(3),635};636 637static const struct iio_chan_spec ltr301_channels[] = {638 LTR501_LIGHT_CHANNEL(),639 LTR501_INTENSITY_CHANNEL(0, LTR501_ALS_DATA0, IIO_MOD_LIGHT_BOTH, 0,640 ltr501_als_event_spec,641 ARRAY_SIZE(ltr501_als_event_spec)),642 LTR501_INTENSITY_CHANNEL(1, LTR501_ALS_DATA1, IIO_MOD_LIGHT_IR,643 BIT(IIO_CHAN_INFO_SCALE) |644 BIT(IIO_CHAN_INFO_INT_TIME) |645 BIT(IIO_CHAN_INFO_SAMP_FREQ),646 NULL, 0),647 IIO_CHAN_SOFT_TIMESTAMP(2),648};649 650static int ltr501_read_raw(struct iio_dev *indio_dev,651 struct iio_chan_spec const *chan,652 int *val, int *val2, long mask)653{654 struct ltr501_data *data = iio_priv(indio_dev);655 __le16 buf[2];656 int ret, i;657 658 switch (mask) {659 case IIO_CHAN_INFO_PROCESSED:660 switch (chan->type) {661 case IIO_LIGHT:662 ret = iio_device_claim_direct_mode(indio_dev);663 if (ret)664 return ret;665 666 mutex_lock(&data->lock_als);667 ret = ltr501_read_als(data, buf);668 mutex_unlock(&data->lock_als);669 iio_device_release_direct_mode(indio_dev);670 if (ret < 0)671 return ret;672 *val = ltr501_calculate_lux(le16_to_cpu(buf[1]),673 le16_to_cpu(buf[0]));674 return IIO_VAL_INT;675 default:676 return -EINVAL;677 }678 case IIO_CHAN_INFO_RAW:679 ret = iio_device_claim_direct_mode(indio_dev);680 if (ret)681 return ret;682 683 switch (chan->type) {684 case IIO_INTENSITY:685 mutex_lock(&data->lock_als);686 ret = ltr501_read_als(data, buf);687 mutex_unlock(&data->lock_als);688 if (ret < 0)689 break;690 *val = le16_to_cpu(chan->address == LTR501_ALS_DATA1 ?691 buf[0] : buf[1]);692 ret = IIO_VAL_INT;693 break;694 case IIO_PROXIMITY:695 mutex_lock(&data->lock_ps);696 ret = ltr501_read_ps(data);697 mutex_unlock(&data->lock_ps);698 if (ret < 0)699 break;700 *val = ret & LTR501_PS_DATA_MASK;701 ret = IIO_VAL_INT;702 break;703 default:704 ret = -EINVAL;705 break;706 }707 708 iio_device_release_direct_mode(indio_dev);709 return ret;710 711 case IIO_CHAN_INFO_SCALE:712 switch (chan->type) {713 case IIO_INTENSITY:714 i = (data->als_contr & data->chip_info->als_gain_mask)715 >> data->chip_info->als_gain_shift;716 *val = data->chip_info->als_gain[i].scale;717 *val2 = data->chip_info->als_gain[i].uscale;718 return IIO_VAL_INT_PLUS_MICRO;719 case IIO_PROXIMITY:720 i = (data->ps_contr & LTR501_CONTR_PS_GAIN_MASK) >>721 LTR501_CONTR_PS_GAIN_SHIFT;722 *val = data->chip_info->ps_gain[i].scale;723 *val2 = data->chip_info->ps_gain[i].uscale;724 return IIO_VAL_INT_PLUS_MICRO;725 default:726 return -EINVAL;727 }728 case IIO_CHAN_INFO_INT_TIME:729 switch (chan->type) {730 case IIO_INTENSITY:731 return ltr501_read_it_time(data, val, val2);732 default:733 return -EINVAL;734 }735 case IIO_CHAN_INFO_SAMP_FREQ:736 switch (chan->type) {737 case IIO_INTENSITY:738 return ltr501_als_read_samp_freq(data, val, val2);739 case IIO_PROXIMITY:740 return ltr501_ps_read_samp_freq(data, val, val2);741 default:742 return -EINVAL;743 }744 }745 return -EINVAL;746}747 748static int ltr501_get_gain_index(const struct ltr501_gain *gain, int size,749 int val, int val2)750{751 int i;752 753 for (i = 0; i < size; i++)754 if (val == gain[i].scale && val2 == gain[i].uscale)755 return i;756 757 return -1;758}759 760static int ltr501_write_raw(struct iio_dev *indio_dev,761 struct iio_chan_spec const *chan,762 int val, int val2, long mask)763{764 struct ltr501_data *data = iio_priv(indio_dev);765 int i, ret, freq_val, freq_val2;766 const struct ltr501_chip_info *info = data->chip_info;767 768 ret = iio_device_claim_direct_mode(indio_dev);769 if (ret)770 return ret;771 772 switch (mask) {773 case IIO_CHAN_INFO_SCALE:774 switch (chan->type) {775 case IIO_INTENSITY:776 i = ltr501_get_gain_index(info->als_gain,777 info->als_gain_tbl_size,778 val, val2);779 if (i < 0) {780 ret = -EINVAL;781 break;782 }783 784 data->als_contr &= ~info->als_gain_mask;785 data->als_contr |= i << info->als_gain_shift;786 787 ret = regmap_write(data->regmap, LTR501_ALS_CONTR,788 data->als_contr);789 break;790 case IIO_PROXIMITY:791 i = ltr501_get_gain_index(info->ps_gain,792 info->ps_gain_tbl_size,793 val, val2);794 if (i < 0) {795 ret = -EINVAL;796 break;797 }798 data->ps_contr &= ~LTR501_CONTR_PS_GAIN_MASK;799 data->ps_contr |= i << LTR501_CONTR_PS_GAIN_SHIFT;800 801 ret = regmap_write(data->regmap, LTR501_PS_CONTR,802 data->ps_contr);803 break;804 default:805 ret = -EINVAL;806 break;807 }808 break;809 810 case IIO_CHAN_INFO_INT_TIME:811 switch (chan->type) {812 case IIO_INTENSITY:813 if (val != 0) {814 ret = -EINVAL;815 break;816 }817 mutex_lock(&data->lock_als);818 ret = ltr501_set_it_time(data, val2);819 mutex_unlock(&data->lock_als);820 break;821 default:822 ret = -EINVAL;823 break;824 }825 break;826 827 case IIO_CHAN_INFO_SAMP_FREQ:828 switch (chan->type) {829 case IIO_INTENSITY:830 ret = ltr501_als_read_samp_freq(data, &freq_val,831 &freq_val2);832 if (ret < 0)833 break;834 835 ret = ltr501_als_write_samp_freq(data, val, val2);836 if (ret < 0)837 break;838 839 /* update persistence count when changing frequency */840 ret = ltr501_write_intr_prst(data, chan->type,841 0, data->als_period);842 843 if (ret < 0)844 ret = ltr501_als_write_samp_freq(data, freq_val,845 freq_val2);846 break;847 case IIO_PROXIMITY:848 ret = ltr501_ps_read_samp_freq(data, &freq_val,849 &freq_val2);850 if (ret < 0)851 break;852 853 ret = ltr501_ps_write_samp_freq(data, val, val2);854 if (ret < 0)855 break;856 857 /* update persistence count when changing frequency */858 ret = ltr501_write_intr_prst(data, chan->type,859 0, data->ps_period);860 861 if (ret < 0)862 ret = ltr501_ps_write_samp_freq(data, freq_val,863 freq_val2);864 break;865 default:866 ret = -EINVAL;867 break;868 }869 break;870 871 default:872 ret = -EINVAL;873 break;874 }875 876 iio_device_release_direct_mode(indio_dev);877 return ret;878}879 880static int ltr501_read_thresh(const struct iio_dev *indio_dev,881 const struct iio_chan_spec *chan,882 enum iio_event_type type,883 enum iio_event_direction dir,884 enum iio_event_info info,885 int *val, int *val2)886{887 const struct ltr501_data *data = iio_priv(indio_dev);888 int ret, thresh_data;889 890 switch (chan->type) {891 case IIO_INTENSITY:892 switch (dir) {893 case IIO_EV_DIR_RISING:894 ret = regmap_bulk_read(data->regmap,895 LTR501_ALS_THRESH_UP,896 &thresh_data, 2);897 if (ret < 0)898 return ret;899 *val = thresh_data & LTR501_ALS_THRESH_MASK;900 return IIO_VAL_INT;901 case IIO_EV_DIR_FALLING:902 ret = regmap_bulk_read(data->regmap,903 LTR501_ALS_THRESH_LOW,904 &thresh_data, 2);905 if (ret < 0)906 return ret;907 *val = thresh_data & LTR501_ALS_THRESH_MASK;908 return IIO_VAL_INT;909 default:910 return -EINVAL;911 }912 case IIO_PROXIMITY:913 switch (dir) {914 case IIO_EV_DIR_RISING:915 ret = regmap_bulk_read(data->regmap,916 LTR501_PS_THRESH_UP,917 &thresh_data, 2);918 if (ret < 0)919 return ret;920 *val = thresh_data & LTR501_PS_THRESH_MASK;921 return IIO_VAL_INT;922 case IIO_EV_DIR_FALLING:923 ret = regmap_bulk_read(data->regmap,924 LTR501_PS_THRESH_LOW,925 &thresh_data, 2);926 if (ret < 0)927 return ret;928 *val = thresh_data & LTR501_PS_THRESH_MASK;929 return IIO_VAL_INT;930 default:931 return -EINVAL;932 }933 default:934 return -EINVAL;935 }936 937 return -EINVAL;938}939 940static int ltr501_write_thresh(struct iio_dev *indio_dev,941 const struct iio_chan_spec *chan,942 enum iio_event_type type,943 enum iio_event_direction dir,944 enum iio_event_info info,945 int val, int val2)946{947 struct ltr501_data *data = iio_priv(indio_dev);948 int ret;949 950 if (val < 0)951 return -EINVAL;952 953 switch (chan->type) {954 case IIO_INTENSITY:955 if (val > LTR501_ALS_THRESH_MASK)956 return -EINVAL;957 switch (dir) {958 case IIO_EV_DIR_RISING:959 mutex_lock(&data->lock_als);960 ret = regmap_bulk_write(data->regmap,961 LTR501_ALS_THRESH_UP,962 &val, 2);963 mutex_unlock(&data->lock_als);964 return ret;965 case IIO_EV_DIR_FALLING:966 mutex_lock(&data->lock_als);967 ret = regmap_bulk_write(data->regmap,968 LTR501_ALS_THRESH_LOW,969 &val, 2);970 mutex_unlock(&data->lock_als);971 return ret;972 default:973 return -EINVAL;974 }975 case IIO_PROXIMITY:976 if (val > LTR501_PS_THRESH_MASK)977 return -EINVAL;978 switch (dir) {979 case IIO_EV_DIR_RISING:980 mutex_lock(&data->lock_ps);981 ret = regmap_bulk_write(data->regmap,982 LTR501_PS_THRESH_UP,983 &val, 2);984 mutex_unlock(&data->lock_ps);985 return ret;986 case IIO_EV_DIR_FALLING:987 mutex_lock(&data->lock_ps);988 ret = regmap_bulk_write(data->regmap,989 LTR501_PS_THRESH_LOW,990 &val, 2);991 mutex_unlock(&data->lock_ps);992 return ret;993 default:994 return -EINVAL;995 }996 default:997 return -EINVAL;998 }999 1000 return -EINVAL;1001}1002 1003static int ltr501_read_event(struct iio_dev *indio_dev,1004 const struct iio_chan_spec *chan,1005 enum iio_event_type type,1006 enum iio_event_direction dir,1007 enum iio_event_info info,1008 int *val, int *val2)1009{1010 int ret;1011 1012 switch (info) {1013 case IIO_EV_INFO_VALUE:1014 return ltr501_read_thresh(indio_dev, chan, type, dir,1015 info, val, val2);1016 case IIO_EV_INFO_PERIOD:1017 ret = ltr501_read_intr_prst(iio_priv(indio_dev),1018 chan->type, val2);1019 *val = *val2 / 1000000;1020 *val2 = *val2 % 1000000;1021 return ret;1022 default:1023 return -EINVAL;1024 }1025 1026 return -EINVAL;1027}1028 1029static int ltr501_write_event(struct iio_dev *indio_dev,1030 const struct iio_chan_spec *chan,1031 enum iio_event_type type,1032 enum iio_event_direction dir,1033 enum iio_event_info info,1034 int val, int val2)1035{1036 switch (info) {1037 case IIO_EV_INFO_VALUE:1038 if (val2 != 0)1039 return -EINVAL;1040 return ltr501_write_thresh(indio_dev, chan, type, dir,1041 info, val, val2);1042 case IIO_EV_INFO_PERIOD:1043 return ltr501_write_intr_prst(iio_priv(indio_dev), chan->type,1044 val, val2);1045 default:1046 return -EINVAL;1047 }1048 1049 return -EINVAL;1050}1051 1052static int ltr501_read_event_config(struct iio_dev *indio_dev,1053 const struct iio_chan_spec *chan,1054 enum iio_event_type type,1055 enum iio_event_direction dir)1056{1057 struct ltr501_data *data = iio_priv(indio_dev);1058 int ret, status;1059 1060 switch (chan->type) {1061 case IIO_INTENSITY:1062 ret = regmap_field_read(data->reg_als_intr, &status);1063 if (ret < 0)1064 return ret;1065 return status;1066 case IIO_PROXIMITY:1067 ret = regmap_field_read(data->reg_ps_intr, &status);1068 if (ret < 0)1069 return ret;1070 return status;1071 default:1072 return -EINVAL;1073 }1074 1075 return -EINVAL;1076}1077 1078static int ltr501_write_event_config(struct iio_dev *indio_dev,1079 const struct iio_chan_spec *chan,1080 enum iio_event_type type,1081 enum iio_event_direction dir, int state)1082{1083 struct ltr501_data *data = iio_priv(indio_dev);1084 int ret;1085 1086 /* only 1 and 0 are valid inputs */1087 if (state != 1 && state != 0)1088 return -EINVAL;1089 1090 switch (chan->type) {1091 case IIO_INTENSITY:1092 mutex_lock(&data->lock_als);1093 ret = regmap_field_write(data->reg_als_intr, state);1094 mutex_unlock(&data->lock_als);1095 return ret;1096 case IIO_PROXIMITY:1097 mutex_lock(&data->lock_ps);1098 ret = regmap_field_write(data->reg_ps_intr, state);1099 mutex_unlock(&data->lock_ps);1100 return ret;1101 default:1102 return -EINVAL;1103 }1104 1105 return -EINVAL;1106}1107 1108static ssize_t ltr501_show_proximity_scale_avail(struct device *dev,1109 struct device_attribute *attr,1110 char *buf)1111{1112 struct ltr501_data *data = iio_priv(dev_to_iio_dev(dev));1113 const struct ltr501_chip_info *info = data->chip_info;1114 ssize_t len = 0;1115 int i;1116 1117 for (i = 0; i < info->ps_gain_tbl_size; i++) {1118 if (info->ps_gain[i].scale == LTR501_RESERVED_GAIN)1119 continue;1120 len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%06d ",1121 info->ps_gain[i].scale,1122 info->ps_gain[i].uscale);1123 }1124 1125 buf[len - 1] = '\n';1126 1127 return len;1128}1129 1130static ssize_t ltr501_show_intensity_scale_avail(struct device *dev,1131 struct device_attribute *attr,1132 char *buf)1133{1134 struct ltr501_data *data = iio_priv(dev_to_iio_dev(dev));1135 const struct ltr501_chip_info *info = data->chip_info;1136 ssize_t len = 0;1137 int i;1138 1139 for (i = 0; i < info->als_gain_tbl_size; i++) {1140 if (info->als_gain[i].scale == LTR501_RESERVED_GAIN)1141 continue;1142 len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%06d ",1143 info->als_gain[i].scale,1144 info->als_gain[i].uscale);1145 }1146 1147 buf[len - 1] = '\n';1148 1149 return len;1150}1151 1152static IIO_CONST_ATTR_INT_TIME_AVAIL("0.05 0.1 0.2 0.4");1153static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("20 10 5 2 1 0.5");1154 1155static IIO_DEVICE_ATTR(in_proximity_scale_available, S_IRUGO,1156 ltr501_show_proximity_scale_avail, NULL, 0);1157static IIO_DEVICE_ATTR(in_intensity_scale_available, S_IRUGO,1158 ltr501_show_intensity_scale_avail, NULL, 0);1159 1160static struct attribute *ltr501_attributes[] = {1161 &iio_dev_attr_in_proximity_scale_available.dev_attr.attr,1162 &iio_dev_attr_in_intensity_scale_available.dev_attr.attr,1163 &iio_const_attr_integration_time_available.dev_attr.attr,1164 &iio_const_attr_sampling_frequency_available.dev_attr.attr,1165 NULL1166};1167 1168static struct attribute *ltr301_attributes[] = {1169 &iio_dev_attr_in_intensity_scale_available.dev_attr.attr,1170 &iio_const_attr_integration_time_available.dev_attr.attr,1171 &iio_const_attr_sampling_frequency_available.dev_attr.attr,1172 NULL1173};1174 1175static const struct attribute_group ltr501_attribute_group = {1176 .attrs = ltr501_attributes,1177};1178 1179static const struct attribute_group ltr301_attribute_group = {1180 .attrs = ltr301_attributes,1181};1182 1183static const struct iio_info ltr501_info_no_irq = {1184 .read_raw = ltr501_read_raw,1185 .write_raw = ltr501_write_raw,1186 .attrs = <r501_attribute_group,1187};1188 1189static const struct iio_info ltr501_info = {1190 .read_raw = ltr501_read_raw,1191 .write_raw = ltr501_write_raw,1192 .attrs = <r501_attribute_group,1193 .read_event_value = <r501_read_event,1194 .write_event_value = <r501_write_event,1195 .read_event_config = <r501_read_event_config,1196 .write_event_config = <r501_write_event_config,1197};1198 1199static const struct iio_info ltr301_info_no_irq = {1200 .read_raw = ltr501_read_raw,1201 .write_raw = ltr501_write_raw,1202 .attrs = <r301_attribute_group,1203};1204 1205static const struct iio_info ltr301_info = {1206 .read_raw = ltr501_read_raw,1207 .write_raw = ltr501_write_raw,1208 .attrs = <r301_attribute_group,1209 .read_event_value = <r501_read_event,1210 .write_event_value = <r501_write_event,1211 .read_event_config = <r501_read_event_config,1212 .write_event_config = <r501_write_event_config,1213};1214 1215static const struct ltr501_chip_info ltr501_chip_info_tbl[] = {1216 [ltr501] = {1217 .partid = 0x08,1218 .als_gain = ltr501_als_gain_tbl,1219 .als_gain_tbl_size = ARRAY_SIZE(ltr501_als_gain_tbl),1220 .ps_gain = ltr501_ps_gain_tbl,1221 .ps_gain_tbl_size = ARRAY_SIZE(ltr501_ps_gain_tbl),1222 .als_mode_active = BIT(0) | BIT(1),1223 .als_gain_mask = BIT(3),1224 .als_gain_shift = 3,1225 .info = <r501_info,1226 .info_no_irq = <r501_info_no_irq,1227 .channels = ltr501_channels,1228 .no_channels = ARRAY_SIZE(ltr501_channels),1229 },1230 [ltr559] = {1231 .partid = 0x09,1232 .als_gain = ltr559_als_gain_tbl,1233 .als_gain_tbl_size = ARRAY_SIZE(ltr559_als_gain_tbl),1234 .ps_gain = ltr559_ps_gain_tbl,1235 .ps_gain_tbl_size = ARRAY_SIZE(ltr559_ps_gain_tbl),1236 .als_mode_active = BIT(0),1237 .als_gain_mask = BIT(2) | BIT(3) | BIT(4),1238 .als_gain_shift = 2,1239 .info = <r501_info,1240 .info_no_irq = <r501_info_no_irq,1241 .channels = ltr501_channels,1242 .no_channels = ARRAY_SIZE(ltr501_channels),1243 },1244 [ltr301] = {1245 .partid = 0x08,1246 .als_gain = ltr501_als_gain_tbl,1247 .als_gain_tbl_size = ARRAY_SIZE(ltr501_als_gain_tbl),1248 .als_mode_active = BIT(0) | BIT(1),1249 .als_gain_mask = BIT(3),1250 .als_gain_shift = 3,1251 .info = <r301_info,1252 .info_no_irq = <r301_info_no_irq,1253 .channels = ltr301_channels,1254 .no_channels = ARRAY_SIZE(ltr301_channels),1255 },1256 [ltr303] = {1257 .partid = 0x0A,1258 .als_gain = ltr559_als_gain_tbl,1259 .als_gain_tbl_size = ARRAY_SIZE(ltr559_als_gain_tbl),1260 .als_mode_active = BIT(0),1261 .als_gain_mask = BIT(2) | BIT(3) | BIT(4),1262 .als_gain_shift = 2,1263 .info = <r301_info,1264 .info_no_irq = <r301_info_no_irq,1265 .channels = ltr301_channels,1266 .no_channels = ARRAY_SIZE(ltr301_channels),1267 },1268};1269 1270static int ltr501_write_contr(struct ltr501_data *data, u8 als_val, u8 ps_val)1271{1272 int ret;1273 1274 ret = regmap_write(data->regmap, LTR501_ALS_CONTR, als_val);1275 if (ret < 0)1276 return ret;1277 1278 return regmap_write(data->regmap, LTR501_PS_CONTR, ps_val);1279}1280 1281static irqreturn_t ltr501_trigger_handler(int irq, void *p)1282{1283 struct iio_poll_func *pf = p;1284 struct iio_dev *indio_dev = pf->indio_dev;1285 struct ltr501_data *data = iio_priv(indio_dev);1286 struct {1287 u16 channels[3];1288 s64 ts __aligned(8);1289 } scan;1290 __le16 als_buf[2];1291 u8 mask = 0;1292 int j = 0;1293 int ret, psdata;1294 1295 memset(&scan, 0, sizeof(scan));1296 1297 /* figure out which data needs to be ready */1298 if (test_bit(0, indio_dev->active_scan_mask) ||1299 test_bit(1, indio_dev->active_scan_mask))1300 mask |= LTR501_STATUS_ALS_RDY;1301 if (test_bit(2, indio_dev->active_scan_mask))1302 mask |= LTR501_STATUS_PS_RDY;1303 1304 ret = ltr501_drdy(data, mask);1305 if (ret < 0)1306 goto done;1307 1308 if (mask & LTR501_STATUS_ALS_RDY) {1309 ret = regmap_bulk_read(data->regmap, LTR501_ALS_DATA1,1310 als_buf, sizeof(als_buf));1311 if (ret < 0)1312 goto done;1313 if (test_bit(0, indio_dev->active_scan_mask))1314 scan.channels[j++] = le16_to_cpu(als_buf[1]);1315 if (test_bit(1, indio_dev->active_scan_mask))1316 scan.channels[j++] = le16_to_cpu(als_buf[0]);1317 }1318 1319 if (mask & LTR501_STATUS_PS_RDY) {1320 ret = regmap_bulk_read(data->regmap, LTR501_PS_DATA,1321 &psdata, 2);1322 if (ret < 0)1323 goto done;1324 scan.channels[j++] = psdata & LTR501_PS_DATA_MASK;1325 }1326 1327 iio_push_to_buffers_with_timestamp(indio_dev, &scan,1328 iio_get_time_ns(indio_dev));1329 1330done:1331 iio_trigger_notify_done(indio_dev->trig);1332 1333 return IRQ_HANDLED;1334}1335 1336static irqreturn_t ltr501_interrupt_handler(int irq, void *private)1337{1338 struct iio_dev *indio_dev = private;1339 struct ltr501_data *data = iio_priv(indio_dev);1340 int ret, status;1341 1342 ret = regmap_read(data->regmap, LTR501_ALS_PS_STATUS, &status);1343 if (ret < 0) {1344 dev_err(&data->client->dev,1345 "irq read int reg failed\n");1346 return IRQ_HANDLED;1347 }1348 1349 if (status & LTR501_STATUS_ALS_INTR)1350 iio_push_event(indio_dev,1351 IIO_UNMOD_EVENT_CODE(IIO_INTENSITY, 0,1352 IIO_EV_TYPE_THRESH,1353 IIO_EV_DIR_EITHER),1354 iio_get_time_ns(indio_dev));1355 1356 if (status & LTR501_STATUS_PS_INTR)1357 iio_push_event(indio_dev,1358 IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 0,1359 IIO_EV_TYPE_THRESH,1360 IIO_EV_DIR_EITHER),1361 iio_get_time_ns(indio_dev));1362 1363 return IRQ_HANDLED;1364}1365 1366static int ltr501_init(struct ltr501_data *data)1367{1368 int ret, status;1369 1370 ret = regmap_read(data->regmap, LTR501_ALS_CONTR, &status);1371 if (ret < 0)1372 return ret;1373 1374 data->als_contr = status | data->chip_info->als_mode_active;1375 1376 ret = regmap_read(data->regmap, LTR501_PS_CONTR, &status);1377 if (ret < 0)1378 return ret;1379 1380 data->ps_contr = status | LTR501_CONTR_ACTIVE;1381 1382 ret = ltr501_read_intr_prst(data, IIO_INTENSITY, &data->als_period);1383 if (ret < 0)1384 return ret;1385 1386 ret = ltr501_read_intr_prst(data, IIO_PROXIMITY, &data->ps_period);1387 if (ret < 0)1388 return ret;1389 1390 return ltr501_write_contr(data, data->als_contr, data->ps_contr);1391}1392 1393static bool ltr501_is_volatile_reg(struct device *dev, unsigned int reg)1394{1395 switch (reg) {1396 case LTR501_ALS_DATA1:1397 case LTR501_ALS_DATA1_UPPER:1398 case LTR501_ALS_DATA0:1399 case LTR501_ALS_DATA0_UPPER:1400 case LTR501_ALS_PS_STATUS:1401 case LTR501_PS_DATA:1402 case LTR501_PS_DATA_UPPER:1403 return true;1404 default:1405 return false;1406 }1407}1408 1409static const struct regmap_config ltr501_regmap_config = {1410 .name = LTR501_REGMAP_NAME,1411 .reg_bits = 8,1412 .val_bits = 8,1413 .max_register = LTR501_MAX_REG,1414 .cache_type = REGCACHE_RBTREE,1415 .volatile_reg = ltr501_is_volatile_reg,1416};1417 1418static int ltr501_powerdown(struct ltr501_data *data)1419{1420 return ltr501_write_contr(data, data->als_contr &1421 ~data->chip_info->als_mode_active,1422 data->ps_contr & ~LTR501_CONTR_ACTIVE);1423}1424 1425static const char *ltr501_match_acpi_device(struct device *dev, int *chip_idx)1426{1427 const struct acpi_device_id *id;1428 1429 id = acpi_match_device(dev->driver->acpi_match_table, dev);1430 if (!id)1431 return NULL;1432 *chip_idx = id->driver_data;1433 return dev_name(dev);1434}1435 1436static int ltr501_probe(struct i2c_client *client)1437{1438 const struct i2c_device_id *id = i2c_client_get_device_id(client);1439 static const char * const regulator_names[] = { "vdd", "vddio" };1440 struct ltr501_data *data;1441 struct iio_dev *indio_dev;1442 struct regmap *regmap;1443 int ret, partid, chip_idx = 0;1444 const char *name = NULL;1445 1446 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));1447 if (!indio_dev)1448 return -ENOMEM;1449 1450 regmap = devm_regmap_init_i2c(client, <r501_regmap_config);1451 if (IS_ERR(regmap)) {1452 dev_err(&client->dev, "Regmap initialization failed.\n");1453 return PTR_ERR(regmap);1454 }1455 1456 data = iio_priv(indio_dev);1457 i2c_set_clientdata(client, indio_dev);1458 data->client = client;1459 data->regmap = regmap;1460 mutex_init(&data->lock_als);1461 mutex_init(&data->lock_ps);1462 1463 ret = devm_regulator_bulk_get_enable(&client->dev,1464 ARRAY_SIZE(regulator_names),1465 regulator_names);1466 if (ret)1467 return dev_err_probe(&client->dev, ret,1468 "Failed to get regulators\n");1469 1470 data->reg_it = devm_regmap_field_alloc(&client->dev, regmap,1471 reg_field_it);1472 if (IS_ERR(data->reg_it)) {1473 dev_err(&client->dev, "Integ time reg field init failed.\n");1474 return PTR_ERR(data->reg_it);1475 }1476 1477 data->reg_als_intr = devm_regmap_field_alloc(&client->dev, regmap,1478 reg_field_als_intr);1479 if (IS_ERR(data->reg_als_intr)) {1480 dev_err(&client->dev, "ALS intr mode reg field init failed\n");1481 return PTR_ERR(data->reg_als_intr);1482 }1483 1484 data->reg_ps_intr = devm_regmap_field_alloc(&client->dev, regmap,1485 reg_field_ps_intr);1486 if (IS_ERR(data->reg_ps_intr)) {1487 dev_err(&client->dev, "PS intr mode reg field init failed.\n");1488 return PTR_ERR(data->reg_ps_intr);1489 }1490 1491 data->reg_als_rate = devm_regmap_field_alloc(&client->dev, regmap,1492 reg_field_als_rate);1493 if (IS_ERR(data->reg_als_rate)) {1494 dev_err(&client->dev, "ALS samp rate field init failed.\n");1495 return PTR_ERR(data->reg_als_rate);1496 }1497 1498 data->reg_ps_rate = devm_regmap_field_alloc(&client->dev, regmap,1499 reg_field_ps_rate);1500 if (IS_ERR(data->reg_ps_rate)) {1501 dev_err(&client->dev, "PS samp rate field init failed.\n");1502 return PTR_ERR(data->reg_ps_rate);1503 }1504 1505 data->reg_als_prst = devm_regmap_field_alloc(&client->dev, regmap,1506 reg_field_als_prst);1507 if (IS_ERR(data->reg_als_prst)) {1508 dev_err(&client->dev, "ALS prst reg field init failed\n");1509 return PTR_ERR(data->reg_als_prst);1510 }1511 1512 data->reg_ps_prst = devm_regmap_field_alloc(&client->dev, regmap,1513 reg_field_ps_prst);1514 if (IS_ERR(data->reg_ps_prst)) {1515 dev_err(&client->dev, "PS prst reg field init failed.\n");1516 return PTR_ERR(data->reg_ps_prst);1517 }1518 1519 ret = regmap_read(data->regmap, LTR501_PART_ID, &partid);1520 if (ret < 0)1521 return ret;1522 1523 if (id) {1524 name = id->name;1525 chip_idx = id->driver_data;1526 } else if (ACPI_HANDLE(&client->dev)) {1527 name = ltr501_match_acpi_device(&client->dev, &chip_idx);1528 } else {1529 return -ENODEV;1530 }1531 1532 data->chip_info = <r501_chip_info_tbl[chip_idx];1533 1534 if ((partid >> 4) != data->chip_info->partid)1535 return -ENODEV;1536 1537 if (device_property_read_u32(&client->dev, "proximity-near-level",1538 &data->near_level))1539 data->near_level = 0;1540 1541 indio_dev->info = data->chip_info->info;1542 indio_dev->channels = data->chip_info->channels;1543 indio_dev->num_channels = data->chip_info->no_channels;1544 indio_dev->name = name;1545 indio_dev->modes = INDIO_DIRECT_MODE;1546 1547 ret = ltr501_init(data);1548 if (ret < 0)1549 return ret;1550 1551 if (client->irq > 0) {1552 ret = devm_request_threaded_irq(&client->dev, client->irq,1553 NULL, ltr501_interrupt_handler,1554 IRQF_TRIGGER_FALLING |1555 IRQF_ONESHOT,1556 "ltr501_thresh_event",1557 indio_dev);1558 if (ret) {1559 dev_err(&client->dev, "request irq (%d) failed\n",1560 client->irq);1561 return ret;1562 }1563 } else {1564 indio_dev->info = data->chip_info->info_no_irq;1565 }1566 1567 ret = iio_triggered_buffer_setup(indio_dev, NULL,1568 ltr501_trigger_handler, NULL);1569 if (ret)1570 goto powerdown_on_error;1571 1572 ret = iio_device_register(indio_dev);1573 if (ret)1574 goto error_unreg_buffer;1575 1576 return 0;1577 1578error_unreg_buffer:1579 iio_triggered_buffer_cleanup(indio_dev);1580powerdown_on_error:1581 ltr501_powerdown(data);1582 return ret;1583}1584 1585static void ltr501_remove(struct i2c_client *client)1586{1587 struct iio_dev *indio_dev = i2c_get_clientdata(client);1588 1589 iio_device_unregister(indio_dev);1590 iio_triggered_buffer_cleanup(indio_dev);1591 ltr501_powerdown(iio_priv(indio_dev));1592}1593 1594static int ltr501_suspend(struct device *dev)1595{1596 struct ltr501_data *data = iio_priv(i2c_get_clientdata(1597 to_i2c_client(dev)));1598 return ltr501_powerdown(data);1599}1600 1601static int ltr501_resume(struct device *dev)1602{1603 struct ltr501_data *data = iio_priv(i2c_get_clientdata(1604 to_i2c_client(dev)));1605 1606 return ltr501_write_contr(data, data->als_contr,1607 data->ps_contr);1608}1609 1610static DEFINE_SIMPLE_DEV_PM_OPS(ltr501_pm_ops, ltr501_suspend, ltr501_resume);1611 1612static const struct acpi_device_id ltr_acpi_match[] = {1613 { "LTER0501", ltr501 },1614 { "LTER0559", ltr559 },1615 { "LTER0301", ltr301 },1616 { },1617};1618MODULE_DEVICE_TABLE(acpi, ltr_acpi_match);1619 1620static const struct i2c_device_id ltr501_id[] = {1621 { "ltr501", ltr501 },1622 { "ltr559", ltr559 },1623 { "ltr301", ltr301 },1624 { "ltr303", ltr303 },1625 { }1626};1627MODULE_DEVICE_TABLE(i2c, ltr501_id);1628 1629static const struct of_device_id ltr501_of_match[] = {1630 { .compatible = "liteon,ltr501", },1631 { .compatible = "liteon,ltr559", },1632 { .compatible = "liteon,ltr301", },1633 { .compatible = "liteon,ltr303", },1634 {}1635};1636MODULE_DEVICE_TABLE(of, ltr501_of_match);1637 1638static struct i2c_driver ltr501_driver = {1639 .driver = {1640 .name = LTR501_DRV_NAME,1641 .of_match_table = ltr501_of_match,1642 .pm = pm_sleep_ptr(<r501_pm_ops),1643 .acpi_match_table = ltr_acpi_match,1644 },1645 .probe = ltr501_probe,1646 .remove = ltr501_remove,1647 .id_table = ltr501_id,1648};1649 1650module_i2c_driver(ltr501_driver);1651 1652MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");1653MODULE_DESCRIPTION("Lite-On LTR501 ambient light and proximity sensor driver");1654MODULE_LICENSE("GPL");1655