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bh1770glc.c
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linux-6.19.14/drivers/misc/bh1770glc.c
1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * This file is part of the ROHM BH1770GLC / OSRAM SFH7770 sensor driver. 4 * Chip is combined proximity and ambient light sensor. 5 * 6 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). 7 * 8 * Contact: Samu Onkalo <samu.p.onkalo@nokia.com> 9 */ 10 11#include <linux/kernel.h> 12#include <linux/module.h> 13#include <linux/i2c.h> 14#include <linux/interrupt.h> 15#include <linux/mutex.h> 16#include <linux/platform_data/bh1770glc.h> 17#include <linux/regulator/consumer.h> 18#include <linux/pm_runtime.h> 19#include <linux/workqueue.h> 20#include <linux/delay.h> 21#include <linux/wait.h> 22#include <linux/slab.h> 23 24#define BH1770_ALS_CONTROL 0x80 /* ALS operation mode control */ 25#define BH1770_PS_CONTROL 0x81 /* PS operation mode control */ 26#define BH1770_I_LED 0x82 /* active LED and LED1, LED2 current */ 27#define BH1770_I_LED3 0x83 /* LED3 current setting */ 28#define BH1770_ALS_PS_MEAS 0x84 /* Forced mode trigger */ 29#define BH1770_PS_MEAS_RATE 0x85 /* PS meas. rate at stand alone mode */ 30#define BH1770_ALS_MEAS_RATE 0x86 /* ALS meas. rate at stand alone mode */ 31#define BH1770_PART_ID 0x8a /* Part number and revision ID */ 32#define BH1770_MANUFACT_ID 0x8b /* Manufacturerer ID */ 33#define BH1770_ALS_DATA_0 0x8c /* ALS DATA low byte */ 34#define BH1770_ALS_DATA_1 0x8d /* ALS DATA high byte */ 35#define BH1770_ALS_PS_STATUS 0x8e /* Measurement data and int status */ 36#define BH1770_PS_DATA_LED1 0x8f /* PS data from LED1 */ 37#define BH1770_PS_DATA_LED2 0x90 /* PS data from LED2 */ 38#define BH1770_PS_DATA_LED3 0x91 /* PS data from LED3 */ 39#define BH1770_INTERRUPT 0x92 /* Interrupt setting */ 40#define BH1770_PS_TH_LED1 0x93 /* PS interrupt threshold for LED1 */ 41#define BH1770_PS_TH_LED2 0x94 /* PS interrupt threshold for LED2 */ 42#define BH1770_PS_TH_LED3 0x95 /* PS interrupt threshold for LED3 */ 43#define BH1770_ALS_TH_UP_0 0x96 /* ALS upper threshold low byte */ 44#define BH1770_ALS_TH_UP_1 0x97 /* ALS upper threshold high byte */ 45#define BH1770_ALS_TH_LOW_0 0x98 /* ALS lower threshold low byte */ 46#define BH1770_ALS_TH_LOW_1 0x99 /* ALS lower threshold high byte */ 47 48/* MANUFACT_ID */ 49#define BH1770_MANUFACT_ROHM 0x01 50#define BH1770_MANUFACT_OSRAM 0x03 51 52/* PART_ID */ 53#define BH1770_PART 0x90 54#define BH1770_PART_MASK 0xf0 55#define BH1770_REV_MASK 0x0f 56#define BH1770_REV_SHIFT 0 57#define BH1770_REV_0 0x00 58#define BH1770_REV_1 0x01 59 60/* Operating modes for both */ 61#define BH1770_STANDBY 0x00 62#define BH1770_FORCED 0x02 63#define BH1770_STANDALONE 0x03 64#define BH1770_SWRESET (0x01 << 2) 65 66#define BH1770_PS_TRIG_MEAS (1 << 0) 67#define BH1770_ALS_TRIG_MEAS (1 << 1) 68 69/* Interrupt control */ 70#define BH1770_INT_OUTPUT_MODE (1 << 3) /* 0 = latched */ 71#define BH1770_INT_POLARITY (1 << 2) /* 1 = active high */ 72#define BH1770_INT_ALS_ENA (1 << 1) 73#define BH1770_INT_PS_ENA (1 << 0) 74 75/* Interrupt status */ 76#define BH1770_INT_LED1_DATA (1 << 0) 77#define BH1770_INT_LED1_INT (1 << 1) 78#define BH1770_INT_LED2_DATA (1 << 2) 79#define BH1770_INT_LED2_INT (1 << 3) 80#define BH1770_INT_LED3_DATA (1 << 4) 81#define BH1770_INT_LED3_INT (1 << 5) 82#define BH1770_INT_LEDS_INT ((1 << 1) | (1 << 3) | (1 << 5)) 83#define BH1770_INT_ALS_DATA (1 << 6) 84#define BH1770_INT_ALS_INT (1 << 7) 85 86/* Led channels */ 87#define BH1770_LED1 0x00 88 89#define BH1770_DISABLE 0 90#define BH1770_ENABLE 1 91#define BH1770_PROX_CHANNELS 1 92 93#define BH1770_LUX_DEFAULT_RATE 1 /* Index to lux rate table */ 94#define BH1770_PROX_DEFAULT_RATE 1 /* Direct HW value =~ 50Hz */ 95#define BH1770_PROX_DEF_RATE_THRESH 6 /* Direct HW value =~ 5 Hz */ 96#define BH1770_STARTUP_DELAY 50 97#define BH1770_RESET_TIME 10 98#define BH1770_TIMEOUT 2100 /* Timeout in 2.1 seconds */ 99 100#define BH1770_LUX_RANGE 65535 101#define BH1770_PROX_RANGE 255 102#define BH1770_COEF_SCALER 1024 103#define BH1770_CALIB_SCALER 8192 104#define BH1770_LUX_NEUTRAL_CALIB_VALUE (1 * BH1770_CALIB_SCALER) 105#define BH1770_LUX_DEF_THRES 1000 106#define BH1770_PROX_DEF_THRES 70 107#define BH1770_PROX_DEF_ABS_THRES 100 108#define BH1770_DEFAULT_PERSISTENCE 10 109#define BH1770_PROX_MAX_PERSISTENCE 50 110#define BH1770_LUX_GA_SCALE 16384 111#define BH1770_LUX_CF_SCALE 2048 /* CF ChipFactor */ 112#define BH1770_NEUTRAL_CF BH1770_LUX_CF_SCALE 113#define BH1770_LUX_CORR_SCALE 4096 114 115#define PROX_ABOVE_THRESHOLD 1 116#define PROX_BELOW_THRESHOLD 0 117 118#define PROX_IGNORE_LUX_LIMIT 500 119 120struct bh1770_chip { 121 struct bh1770_platform_data *pdata; 122 char chipname[10]; 123 u8 revision; 124 struct i2c_client *client; 125 struct regulator_bulk_data regs[2]; 126 struct mutex mutex; /* avoid parallel access */ 127 wait_queue_head_t wait; 128 129 bool int_mode_prox; 130 bool int_mode_lux; 131 struct delayed_work prox_work; 132 u32 lux_cf; /* Chip specific factor */ 133 u32 lux_ga; 134 u32 lux_calib; 135 int lux_rate_index; 136 u32 lux_corr; 137 u16 lux_data_raw; 138 u16 lux_threshold_hi; 139 u16 lux_threshold_lo; 140 u16 lux_thres_hi_onchip; 141 u16 lux_thres_lo_onchip; 142 bool lux_wait_result; 143 144 int prox_enable_count; 145 u16 prox_coef; 146 u16 prox_const; 147 int prox_rate; 148 int prox_rate_threshold; 149 u8 prox_persistence; 150 u8 prox_persistence_counter; 151 u8 prox_data; 152 u8 prox_threshold; 153 u8 prox_threshold_hw; 154 bool prox_force_update; 155 u8 prox_abs_thres; 156 u8 prox_led; 157}; 158 159static const char reg_vcc[] = "Vcc"; 160static const char reg_vleds[] = "Vleds"; 161 162/* 163 * Supported stand alone rates in ms from chip data sheet 164 * {10, 20, 30, 40, 70, 100, 200, 500, 1000, 2000}; 165 */ 166static const s16 prox_rates_hz[] = {100, 50, 33, 25, 14, 10, 5, 2}; 167static const s16 prox_rates_ms[] = {10, 20, 30, 40, 70, 100, 200, 500}; 168 169/* 170 * Supported stand alone rates in ms from chip data sheet 171 * {100, 200, 500, 1000, 2000}; 172 */ 173static const s16 lux_rates_hz[] = {10, 5, 2, 1, 0}; 174 175/* 176 * interrupt control functions are called while keeping chip->mutex 177 * excluding module probe / remove 178 */ 179static inline int bh1770_lux_interrupt_control(struct bh1770_chip *chip, 180 int lux) 181{ 182 chip->int_mode_lux = lux; 183 /* Set interrupt modes, interrupt active low, latched */ 184 return i2c_smbus_write_byte_data(chip->client, 185 BH1770_INTERRUPT, 186 (lux << 1) | chip->int_mode_prox); 187} 188 189static inline int bh1770_prox_interrupt_control(struct bh1770_chip *chip, 190 int ps) 191{ 192 chip->int_mode_prox = ps; 193 return i2c_smbus_write_byte_data(chip->client, 194 BH1770_INTERRUPT, 195 (chip->int_mode_lux << 1) | (ps << 0)); 196} 197 198/* chip->mutex is always kept here */ 199static int bh1770_lux_rate(struct bh1770_chip *chip, int rate_index) 200{ 201 /* sysfs may call this when the chip is powered off */ 202 if (pm_runtime_suspended(&chip->client->dev)) 203 return 0; 204 205 /* Proper proximity response needs fastest lux rate (100ms) */ 206 if (chip->prox_enable_count) 207 rate_index = 0; 208 209 return i2c_smbus_write_byte_data(chip->client, 210 BH1770_ALS_MEAS_RATE, 211 rate_index); 212} 213 214static int bh1770_prox_rate(struct bh1770_chip *chip, int mode) 215{ 216 int rate; 217 218 rate = (mode == PROX_ABOVE_THRESHOLD) ? 219 chip->prox_rate_threshold : chip->prox_rate; 220 221 return i2c_smbus_write_byte_data(chip->client, 222 BH1770_PS_MEAS_RATE, 223 rate); 224} 225 226/* InfraredLED is controlled by the chip during proximity scanning */ 227static inline int bh1770_led_cfg(struct bh1770_chip *chip) 228{ 229 /* LED cfg, current for leds 1 and 2 */ 230 return i2c_smbus_write_byte_data(chip->client, 231 BH1770_I_LED, 232 (BH1770_LED1 << 6) | 233 (BH1770_LED_5mA << 3) | 234 chip->prox_led); 235} 236 237/* 238 * Following two functions converts raw ps values from HW to normalized 239 * values. Purpose is to compensate differences between different sensor 240 * versions and variants so that result means about the same between 241 * versions. 242 */ 243static inline u8 bh1770_psraw_to_adjusted(struct bh1770_chip *chip, u8 psraw) 244{ 245 u16 adjusted; 246 adjusted = (u16)(((u32)(psraw + chip->prox_const) * chip->prox_coef) / 247 BH1770_COEF_SCALER); 248 if (adjusted > BH1770_PROX_RANGE) 249 adjusted = BH1770_PROX_RANGE; 250 return adjusted; 251} 252 253static inline u8 bh1770_psadjusted_to_raw(struct bh1770_chip *chip, u8 ps) 254{ 255 u16 raw; 256 257 raw = (((u32)ps * BH1770_COEF_SCALER) / chip->prox_coef); 258 if (raw > chip->prox_const) 259 raw = raw - chip->prox_const; 260 else 261 raw = 0; 262 return raw; 263} 264 265/* 266 * Following two functions converts raw lux values from HW to normalized 267 * values. Purpose is to compensate differences between different sensor 268 * versions and variants so that result means about the same between 269 * versions. Chip->mutex is kept when this is called. 270 */ 271static int bh1770_prox_set_threshold(struct bh1770_chip *chip) 272{ 273 u8 tmp = 0; 274 275 /* sysfs may call this when the chip is powered off */ 276 if (pm_runtime_suspended(&chip->client->dev)) 277 return 0; 278 279 tmp = bh1770_psadjusted_to_raw(chip, chip->prox_threshold); 280 chip->prox_threshold_hw = tmp; 281 282 return i2c_smbus_write_byte_data(chip->client, BH1770_PS_TH_LED1, 283 tmp); 284} 285 286static inline u16 bh1770_lux_raw_to_adjusted(struct bh1770_chip *chip, u16 raw) 287{ 288 u32 lux; 289 lux = ((u32)raw * chip->lux_corr) / BH1770_LUX_CORR_SCALE; 290 return min(lux, (u32)BH1770_LUX_RANGE); 291} 292 293static inline u16 bh1770_lux_adjusted_to_raw(struct bh1770_chip *chip, 294 u16 adjusted) 295{ 296 return (u32)adjusted * BH1770_LUX_CORR_SCALE / chip->lux_corr; 297} 298 299/* chip->mutex is kept when this is called */ 300static int bh1770_lux_update_thresholds(struct bh1770_chip *chip, 301 u16 threshold_hi, u16 threshold_lo) 302{ 303 u8 data[4]; 304 int ret; 305 306 /* sysfs may call this when the chip is powered off */ 307 if (pm_runtime_suspended(&chip->client->dev)) 308 return 0; 309 310 /* 311 * Compensate threshold values with the correction factors if not 312 * set to minimum or maximum. 313 * Min & max values disables interrupts. 314 */ 315 if (threshold_hi != BH1770_LUX_RANGE && threshold_hi != 0) 316 threshold_hi = bh1770_lux_adjusted_to_raw(chip, threshold_hi); 317 318 if (threshold_lo != BH1770_LUX_RANGE && threshold_lo != 0) 319 threshold_lo = bh1770_lux_adjusted_to_raw(chip, threshold_lo); 320 321 if (chip->lux_thres_hi_onchip == threshold_hi && 322 chip->lux_thres_lo_onchip == threshold_lo) 323 return 0; 324 325 chip->lux_thres_hi_onchip = threshold_hi; 326 chip->lux_thres_lo_onchip = threshold_lo; 327 328 data[0] = threshold_hi; 329 data[1] = threshold_hi >> 8; 330 data[2] = threshold_lo; 331 data[3] = threshold_lo >> 8; 332 333 ret = i2c_smbus_write_i2c_block_data(chip->client, 334 BH1770_ALS_TH_UP_0, 335 ARRAY_SIZE(data), 336 data); 337 return ret; 338} 339 340static int bh1770_lux_get_result(struct bh1770_chip *chip) 341{ 342 u16 data; 343 int ret; 344 345 ret = i2c_smbus_read_byte_data(chip->client, BH1770_ALS_DATA_0); 346 if (ret < 0) 347 return ret; 348 349 data = ret & 0xff; 350 ret = i2c_smbus_read_byte_data(chip->client, BH1770_ALS_DATA_1); 351 if (ret < 0) 352 return ret; 353 354 chip->lux_data_raw = data | ((ret & 0xff) << 8); 355 356 return 0; 357} 358 359/* Calculate correction value which contains chip and device specific parts */ 360static u32 bh1770_get_corr_value(struct bh1770_chip *chip) 361{ 362 u32 tmp; 363 /* Impact of glass attenuation correction */ 364 tmp = (BH1770_LUX_CORR_SCALE * chip->lux_ga) / BH1770_LUX_GA_SCALE; 365 /* Impact of chip factor correction */ 366 tmp = (tmp * chip->lux_cf) / BH1770_LUX_CF_SCALE; 367 /* Impact of Device specific calibration correction */ 368 tmp = (tmp * chip->lux_calib) / BH1770_CALIB_SCALER; 369 return tmp; 370} 371 372static int bh1770_lux_read_result(struct bh1770_chip *chip) 373{ 374 bh1770_lux_get_result(chip); 375 return bh1770_lux_raw_to_adjusted(chip, chip->lux_data_raw); 376} 377 378/* 379 * Chip on / off functions are called while keeping mutex except probe 380 * or remove phase 381 */ 382static int bh1770_chip_on(struct bh1770_chip *chip) 383{ 384 int ret = regulator_bulk_enable(ARRAY_SIZE(chip->regs), 385 chip->regs); 386 if (ret < 0) 387 return ret; 388 389 usleep_range(BH1770_STARTUP_DELAY, BH1770_STARTUP_DELAY * 2); 390 391 /* Reset the chip */ 392 i2c_smbus_write_byte_data(chip->client, BH1770_ALS_CONTROL, 393 BH1770_SWRESET); 394 usleep_range(BH1770_RESET_TIME, BH1770_RESET_TIME * 2); 395 396 /* 397 * ALS is started always since proximity needs als results 398 * for realibility estimation. 399 * Let's assume dark until the first ALS measurement is ready. 400 */ 401 chip->lux_data_raw = 0; 402 chip->prox_data = 0; 403 ret = i2c_smbus_write_byte_data(chip->client, 404 BH1770_ALS_CONTROL, BH1770_STANDALONE); 405 406 /* Assume reset defaults */ 407 chip->lux_thres_hi_onchip = BH1770_LUX_RANGE; 408 chip->lux_thres_lo_onchip = 0; 409 410 return ret; 411} 412 413static void bh1770_chip_off(struct bh1770_chip *chip) 414{ 415 i2c_smbus_write_byte_data(chip->client, 416 BH1770_INTERRUPT, BH1770_DISABLE); 417 i2c_smbus_write_byte_data(chip->client, 418 BH1770_ALS_CONTROL, BH1770_STANDBY); 419 i2c_smbus_write_byte_data(chip->client, 420 BH1770_PS_CONTROL, BH1770_STANDBY); 421 regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs); 422} 423 424/* chip->mutex is kept when this is called */ 425static int bh1770_prox_mode_control(struct bh1770_chip *chip) 426{ 427 if (chip->prox_enable_count) { 428 chip->prox_force_update = true; /* Force immediate update */ 429 430 bh1770_lux_rate(chip, chip->lux_rate_index); 431 bh1770_prox_set_threshold(chip); 432 bh1770_led_cfg(chip); 433 bh1770_prox_rate(chip, PROX_BELOW_THRESHOLD); 434 bh1770_prox_interrupt_control(chip, BH1770_ENABLE); 435 i2c_smbus_write_byte_data(chip->client, 436 BH1770_PS_CONTROL, BH1770_STANDALONE); 437 } else { 438 chip->prox_data = 0; 439 bh1770_lux_rate(chip, chip->lux_rate_index); 440 bh1770_prox_interrupt_control(chip, BH1770_DISABLE); 441 i2c_smbus_write_byte_data(chip->client, 442 BH1770_PS_CONTROL, BH1770_STANDBY); 443 } 444 return 0; 445} 446 447/* chip->mutex is kept when this is called */ 448static int bh1770_prox_read_result(struct bh1770_chip *chip) 449{ 450 int ret; 451 bool above; 452 u8 mode; 453 454 ret = i2c_smbus_read_byte_data(chip->client, BH1770_PS_DATA_LED1); 455 if (ret < 0) 456 goto out; 457 458 if (ret > chip->prox_threshold_hw) 459 above = true; 460 else 461 above = false; 462 463 /* 464 * when ALS levels goes above limit, proximity result may be 465 * false proximity. Thus ignore the result. With real proximity 466 * there is a shadow causing low als levels. 467 */ 468 if (chip->lux_data_raw > PROX_IGNORE_LUX_LIMIT) 469 ret = 0; 470 471 chip->prox_data = bh1770_psraw_to_adjusted(chip, ret); 472 473 /* Strong proximity level or force mode requires immediate response */ 474 if (chip->prox_data >= chip->prox_abs_thres || 475 chip->prox_force_update) 476 chip->prox_persistence_counter = chip->prox_persistence; 477 478 chip->prox_force_update = false; 479 480 /* Persistence filttering to reduce false proximity events */ 481 if (likely(above)) { 482 if (chip->prox_persistence_counter < chip->prox_persistence) { 483 chip->prox_persistence_counter++; 484 ret = -ENODATA; 485 } else { 486 mode = PROX_ABOVE_THRESHOLD; 487 ret = 0; 488 } 489 } else { 490 chip->prox_persistence_counter = 0; 491 mode = PROX_BELOW_THRESHOLD; 492 chip->prox_data = 0; 493 ret = 0; 494 } 495 496 /* Set proximity detection rate based on above or below value */ 497 if (ret == 0) { 498 bh1770_prox_rate(chip, mode); 499 sysfs_notify(&chip->client->dev.kobj, NULL, "prox0_raw"); 500 } 501out: 502 return ret; 503} 504 505static int bh1770_detect(struct bh1770_chip *chip) 506{ 507 struct i2c_client *client = chip->client; 508 s32 ret; 509 u8 manu, part; 510 511 ret = i2c_smbus_read_byte_data(client, BH1770_MANUFACT_ID); 512 if (ret < 0) 513 goto error; 514 manu = (u8)ret; 515 516 ret = i2c_smbus_read_byte_data(client, BH1770_PART_ID); 517 if (ret < 0) 518 goto error; 519 part = (u8)ret; 520 521 chip->revision = (part & BH1770_REV_MASK) >> BH1770_REV_SHIFT; 522 chip->prox_coef = BH1770_COEF_SCALER; 523 chip->prox_const = 0; 524 chip->lux_cf = BH1770_NEUTRAL_CF; 525 526 if ((manu == BH1770_MANUFACT_ROHM) && 527 ((part & BH1770_PART_MASK) == BH1770_PART)) { 528 snprintf(chip->chipname, sizeof(chip->chipname), "BH1770GLC"); 529 return 0; 530 } 531 532 if ((manu == BH1770_MANUFACT_OSRAM) && 533 ((part & BH1770_PART_MASK) == BH1770_PART)) { 534 snprintf(chip->chipname, sizeof(chip->chipname), "SFH7770"); 535 /* Values selected by comparing different versions */ 536 chip->prox_coef = 819; /* 0.8 * BH1770_COEF_SCALER */ 537 chip->prox_const = 40; 538 return 0; 539 } 540 541 ret = -ENODEV; 542error: 543 dev_dbg(&client->dev, "BH1770 or SFH7770 not found\n"); 544 545 return ret; 546} 547 548/* 549 * This work is re-scheduled at every proximity interrupt. 550 * If this work is running, it means that there hasn't been any 551 * proximity interrupt in time. Situation is handled as no-proximity. 552 * It would be nice to have low-threshold interrupt or interrupt 553 * when measurement and hi-threshold are both 0. But neither of those exists. 554 * This is a workaroud for missing HW feature. 555 */ 556 557static void bh1770_prox_work(struct work_struct *work) 558{ 559 struct bh1770_chip *chip = 560 container_of(work, struct bh1770_chip, prox_work.work); 561 562 mutex_lock(&chip->mutex); 563 bh1770_prox_read_result(chip); 564 mutex_unlock(&chip->mutex); 565} 566 567/* This is threaded irq handler */ 568static irqreturn_t bh1770_irq(int irq, void *data) 569{ 570 struct bh1770_chip *chip = data; 571 int status; 572 int rate = 0; 573 574 mutex_lock(&chip->mutex); 575 status = i2c_smbus_read_byte_data(chip->client, BH1770_ALS_PS_STATUS); 576 577 /* Acknowledge interrupt by reading this register */ 578 i2c_smbus_read_byte_data(chip->client, BH1770_INTERRUPT); 579 580 /* 581 * Check if there is fresh data available for als. 582 * If this is the very first data, update thresholds after that. 583 */ 584 if (status & BH1770_INT_ALS_DATA) { 585 bh1770_lux_get_result(chip); 586 if (unlikely(chip->lux_wait_result)) { 587 chip->lux_wait_result = false; 588 wake_up(&chip->wait); 589 bh1770_lux_update_thresholds(chip, 590 chip->lux_threshold_hi, 591 chip->lux_threshold_lo); 592 } 593 } 594 595 /* Disable interrupt logic to guarantee acknowledgement */ 596 i2c_smbus_write_byte_data(chip->client, BH1770_INTERRUPT, 597 (0 << 1) | (0 << 0)); 598 599 if ((status & BH1770_INT_ALS_INT)) 600 sysfs_notify(&chip->client->dev.kobj, NULL, "lux0_input"); 601 602 if (chip->int_mode_prox && (status & BH1770_INT_LEDS_INT)) { 603 rate = prox_rates_ms[chip->prox_rate_threshold]; 604 bh1770_prox_read_result(chip); 605 } 606 607 /* Re-enable interrupt logic */ 608 i2c_smbus_write_byte_data(chip->client, BH1770_INTERRUPT, 609 (chip->int_mode_lux << 1) | 610 (chip->int_mode_prox << 0)); 611 mutex_unlock(&chip->mutex); 612 613 /* 614 * Can't cancel work while keeping mutex since the work uses the 615 * same mutex. 616 */ 617 if (rate) { 618 /* 619 * Simulate missing no-proximity interrupt 50ms after the 620 * next expected interrupt time. 621 */ 622 cancel_delayed_work_sync(&chip->prox_work); 623 schedule_delayed_work(&chip->prox_work, 624 msecs_to_jiffies(rate + 50)); 625 } 626 return IRQ_HANDLED; 627} 628 629static ssize_t bh1770_power_state_store(struct device *dev, 630 struct device_attribute *attr, 631 const char *buf, size_t count) 632{ 633 struct bh1770_chip *chip = dev_get_drvdata(dev); 634 unsigned long value; 635 ssize_t ret; 636 637 ret = kstrtoul(buf, 0, &value); 638 if (ret) 639 return ret; 640 641 mutex_lock(&chip->mutex); 642 if (value) { 643 ret = pm_runtime_resume_and_get(dev); 644 if (ret < 0) 645 goto leave; 646 647 ret = bh1770_lux_rate(chip, chip->lux_rate_index); 648 if (ret < 0) { 649 pm_runtime_put(dev); 650 goto leave; 651 } 652 653 ret = bh1770_lux_interrupt_control(chip, BH1770_ENABLE); 654 if (ret < 0) { 655 pm_runtime_put(dev); 656 goto leave; 657 } 658 659 /* This causes interrupt after the next measurement cycle */ 660 bh1770_lux_update_thresholds(chip, BH1770_LUX_DEF_THRES, 661 BH1770_LUX_DEF_THRES); 662 /* Inform that we are waiting for a result from ALS */ 663 chip->lux_wait_result = true; 664 bh1770_prox_mode_control(chip); 665 } else if (!pm_runtime_suspended(dev)) { 666 pm_runtime_put(dev); 667 } 668 ret = count; 669leave: 670 mutex_unlock(&chip->mutex); 671 return ret; 672} 673 674static ssize_t bh1770_power_state_show(struct device *dev, 675 struct device_attribute *attr, char *buf) 676{ 677 return sprintf(buf, "%d\n", !pm_runtime_suspended(dev)); 678} 679 680static ssize_t bh1770_lux_result_show(struct device *dev, 681 struct device_attribute *attr, char *buf) 682{ 683 struct bh1770_chip *chip = dev_get_drvdata(dev); 684 ssize_t ret; 685 long time_left; 686 687 if (pm_runtime_suspended(dev)) 688 return -EIO; /* Chip is not enabled at all */ 689 690 time_left = wait_event_interruptible_timeout(chip->wait, 691 !chip->lux_wait_result, 692 msecs_to_jiffies(BH1770_TIMEOUT)); 693 if (!time_left) 694 return -EIO; 695 696 mutex_lock(&chip->mutex); 697 ret = sprintf(buf, "%d\n", bh1770_lux_read_result(chip)); 698 mutex_unlock(&chip->mutex); 699 700 return ret; 701} 702 703static ssize_t bh1770_lux_range_show(struct device *dev, 704 struct device_attribute *attr, char *buf) 705{ 706 return sprintf(buf, "%d\n", BH1770_LUX_RANGE); 707} 708 709static ssize_t bh1770_prox_enable_store(struct device *dev, 710 struct device_attribute *attr, 711 const char *buf, size_t count) 712{ 713 struct bh1770_chip *chip = dev_get_drvdata(dev); 714 unsigned long value; 715 int ret; 716 717 ret = kstrtoul(buf, 0, &value); 718 if (ret) 719 return ret; 720 721 mutex_lock(&chip->mutex); 722 /* Assume no proximity. Sensor will tell real state soon */ 723 if (!chip->prox_enable_count) 724 chip->prox_data = 0; 725 726 if (value) 727 chip->prox_enable_count++; 728 else if (chip->prox_enable_count > 0) 729 chip->prox_enable_count--; 730 else 731 goto leave; 732 733 /* Run control only when chip is powered on */ 734 if (!pm_runtime_suspended(dev)) 735 bh1770_prox_mode_control(chip); 736leave: 737 mutex_unlock(&chip->mutex); 738 return count; 739} 740 741static ssize_t bh1770_prox_enable_show(struct device *dev, 742 struct device_attribute *attr, char *buf) 743{ 744 struct bh1770_chip *chip = dev_get_drvdata(dev); 745 ssize_t len; 746 747 mutex_lock(&chip->mutex); 748 len = sprintf(buf, "%d\n", chip->prox_enable_count); 749 mutex_unlock(&chip->mutex); 750 return len; 751} 752 753static ssize_t bh1770_prox_result_show(struct device *dev, 754 struct device_attribute *attr, char *buf) 755{ 756 struct bh1770_chip *chip = dev_get_drvdata(dev); 757 ssize_t ret; 758 759 mutex_lock(&chip->mutex); 760 if (chip->prox_enable_count && !pm_runtime_suspended(dev)) 761 ret = sprintf(buf, "%d\n", chip->prox_data); 762 else 763 ret = -EIO; 764 mutex_unlock(&chip->mutex); 765 return ret; 766} 767 768static ssize_t bh1770_prox_range_show(struct device *dev, 769 struct device_attribute *attr, char *buf) 770{ 771 return sprintf(buf, "%d\n", BH1770_PROX_RANGE); 772} 773 774static ssize_t bh1770_get_prox_rate_avail(struct device *dev, 775 struct device_attribute *attr, char *buf) 776{ 777 int i; 778 int pos = 0; 779 for (i = 0; i < ARRAY_SIZE(prox_rates_hz); i++) 780 pos += sprintf(buf + pos, "%d ", prox_rates_hz[i]); 781 sprintf(buf + pos - 1, "\n"); 782 return pos; 783} 784 785static ssize_t bh1770_get_prox_rate_above(struct device *dev, 786 struct device_attribute *attr, char *buf) 787{ 788 struct bh1770_chip *chip = dev_get_drvdata(dev); 789 return sprintf(buf, "%d\n", prox_rates_hz[chip->prox_rate_threshold]); 790} 791 792static ssize_t bh1770_get_prox_rate_below(struct device *dev, 793 struct device_attribute *attr, char *buf) 794{ 795 struct bh1770_chip *chip = dev_get_drvdata(dev); 796 return sprintf(buf, "%d\n", prox_rates_hz[chip->prox_rate]); 797} 798 799static int bh1770_prox_rate_validate(int rate) 800{ 801 int i; 802 803 for (i = 0; i < ARRAY_SIZE(prox_rates_hz) - 1; i++) 804 if (rate >= prox_rates_hz[i]) 805 break; 806 return i; 807} 808 809static ssize_t bh1770_set_prox_rate_above(struct device *dev, 810 struct device_attribute *attr, 811 const char *buf, size_t count) 812{ 813 struct bh1770_chip *chip = dev_get_drvdata(dev); 814 unsigned long value; 815 int ret; 816 817 ret = kstrtoul(buf, 0, &value); 818 if (ret) 819 return ret; 820 821 mutex_lock(&chip->mutex); 822 chip->prox_rate_threshold = bh1770_prox_rate_validate(value); 823 mutex_unlock(&chip->mutex); 824 return count; 825} 826 827static ssize_t bh1770_set_prox_rate_below(struct device *dev, 828 struct device_attribute *attr, 829 const char *buf, size_t count) 830{ 831 struct bh1770_chip *chip = dev_get_drvdata(dev); 832 unsigned long value; 833 int ret; 834 835 ret = kstrtoul(buf, 0, &value); 836 if (ret) 837 return ret; 838 839 mutex_lock(&chip->mutex); 840 chip->prox_rate = bh1770_prox_rate_validate(value); 841 mutex_unlock(&chip->mutex); 842 return count; 843} 844 845static ssize_t bh1770_get_prox_thres(struct device *dev, 846 struct device_attribute *attr, char *buf) 847{ 848 struct bh1770_chip *chip = dev_get_drvdata(dev); 849 return sprintf(buf, "%d\n", chip->prox_threshold); 850} 851 852static ssize_t bh1770_set_prox_thres(struct device *dev, 853 struct device_attribute *attr, 854 const char *buf, size_t count) 855{ 856 struct bh1770_chip *chip = dev_get_drvdata(dev); 857 unsigned long value; 858 int ret; 859 860 ret = kstrtoul(buf, 0, &value); 861 if (ret) 862 return ret; 863 864 if (value > BH1770_PROX_RANGE) 865 return -EINVAL; 866 867 mutex_lock(&chip->mutex); 868 chip->prox_threshold = value; 869 ret = bh1770_prox_set_threshold(chip); 870 mutex_unlock(&chip->mutex); 871 if (ret < 0) 872 return ret; 873 return count; 874} 875 876static ssize_t bh1770_prox_persistence_show(struct device *dev, 877 struct device_attribute *attr, char *buf) 878{ 879 struct bh1770_chip *chip = dev_get_drvdata(dev); 880 881 return sprintf(buf, "%u\n", chip->prox_persistence); 882} 883 884static ssize_t bh1770_prox_persistence_store(struct device *dev, 885 struct device_attribute *attr, 886 const char *buf, size_t len) 887{ 888 struct bh1770_chip *chip = dev_get_drvdata(dev); 889 unsigned long value; 890 int ret; 891 892 ret = kstrtoul(buf, 0, &value); 893 if (ret) 894 return ret; 895 896 if (value > BH1770_PROX_MAX_PERSISTENCE) 897 return -EINVAL; 898 899 chip->prox_persistence = value; 900 901 return len; 902} 903 904static ssize_t bh1770_prox_abs_thres_show(struct device *dev, 905 struct device_attribute *attr, char *buf) 906{ 907 struct bh1770_chip *chip = dev_get_drvdata(dev); 908 return sprintf(buf, "%u\n", chip->prox_abs_thres); 909} 910 911static ssize_t bh1770_prox_abs_thres_store(struct device *dev, 912 struct device_attribute *attr, 913 const char *buf, size_t len) 914{ 915 struct bh1770_chip *chip = dev_get_drvdata(dev); 916 unsigned long value; 917 int ret; 918 919 ret = kstrtoul(buf, 0, &value); 920 if (ret) 921 return ret; 922 923 if (value > BH1770_PROX_RANGE) 924 return -EINVAL; 925 926 chip->prox_abs_thres = value; 927 928 return len; 929} 930 931static ssize_t bh1770_chip_id_show(struct device *dev, 932 struct device_attribute *attr, char *buf) 933{ 934 struct bh1770_chip *chip = dev_get_drvdata(dev); 935 return sprintf(buf, "%s rev %d\n", chip->chipname, chip->revision); 936} 937 938static ssize_t bh1770_lux_calib_default_show(struct device *dev, 939 struct device_attribute *attr, char *buf) 940{ 941 return sprintf(buf, "%u\n", BH1770_CALIB_SCALER); 942} 943 944static ssize_t bh1770_lux_calib_show(struct device *dev, 945 struct device_attribute *attr, char *buf) 946{ 947 struct bh1770_chip *chip = dev_get_drvdata(dev); 948 ssize_t len; 949 950 mutex_lock(&chip->mutex); 951 len = sprintf(buf, "%u\n", chip->lux_calib); 952 mutex_unlock(&chip->mutex); 953 return len; 954} 955 956static ssize_t bh1770_lux_calib_store(struct device *dev, 957 struct device_attribute *attr, 958 const char *buf, size_t len) 959{ 960 struct bh1770_chip *chip = dev_get_drvdata(dev); 961 unsigned long value; 962 u32 old_calib; 963 u32 new_corr; 964 int ret; 965 966 ret = kstrtoul(buf, 0, &value); 967 if (ret) 968 return ret; 969 970 mutex_lock(&chip->mutex); 971 old_calib = chip->lux_calib; 972 chip->lux_calib = value; 973 new_corr = bh1770_get_corr_value(chip); 974 if (new_corr == 0) { 975 chip->lux_calib = old_calib; 976 mutex_unlock(&chip->mutex); 977 return -EINVAL; 978 } 979 chip->lux_corr = new_corr; 980 /* Refresh thresholds on HW after changing correction value */ 981 bh1770_lux_update_thresholds(chip, chip->lux_threshold_hi, 982 chip->lux_threshold_lo); 983 984 mutex_unlock(&chip->mutex); 985 986 return len; 987} 988 989static ssize_t bh1770_get_lux_rate_avail(struct device *dev, 990 struct device_attribute *attr, char *buf) 991{ 992 int i; 993 int pos = 0; 994 for (i = 0; i < ARRAY_SIZE(lux_rates_hz); i++) 995 pos += sprintf(buf + pos, "%d ", lux_rates_hz[i]); 996 sprintf(buf + pos - 1, "\n"); 997 return pos; 998} 999 1000static ssize_t bh1770_get_lux_rate(struct device *dev, 1001 struct device_attribute *attr, char *buf) 1002{ 1003 struct bh1770_chip *chip = dev_get_drvdata(dev); 1004 return sprintf(buf, "%d\n", lux_rates_hz[chip->lux_rate_index]); 1005} 1006 1007static ssize_t bh1770_set_lux_rate(struct device *dev, 1008 struct device_attribute *attr, 1009 const char *buf, size_t count) 1010{ 1011 struct bh1770_chip *chip = dev_get_drvdata(dev); 1012 unsigned long rate_hz; 1013 int ret, i; 1014 1015 ret = kstrtoul(buf, 0, &rate_hz); 1016 if (ret) 1017 return ret; 1018 1019 for (i = 0; i < ARRAY_SIZE(lux_rates_hz) - 1; i++) 1020 if (rate_hz >= lux_rates_hz[i]) 1021 break; 1022 1023 mutex_lock(&chip->mutex); 1024 chip->lux_rate_index = i; 1025 ret = bh1770_lux_rate(chip, i); 1026 mutex_unlock(&chip->mutex); 1027 1028 if (ret < 0) 1029 return ret; 1030 1031 return count; 1032} 1033 1034static ssize_t bh1770_get_lux_thresh_above(struct device *dev, 1035 struct device_attribute *attr, char *buf) 1036{ 1037 struct bh1770_chip *chip = dev_get_drvdata(dev); 1038 return sprintf(buf, "%d\n", chip->lux_threshold_hi); 1039} 1040 1041static ssize_t bh1770_get_lux_thresh_below(struct device *dev, 1042 struct device_attribute *attr, char *buf) 1043{ 1044 struct bh1770_chip *chip = dev_get_drvdata(dev); 1045 return sprintf(buf, "%d\n", chip->lux_threshold_lo); 1046} 1047 1048static ssize_t bh1770_set_lux_thresh(struct bh1770_chip *chip, u16 *target, 1049 const char *buf) 1050{ 1051 unsigned long thresh; 1052 int ret; 1053 1054 ret = kstrtoul(buf, 0, &thresh); 1055 if (ret) 1056 return ret; 1057 1058 if (thresh > BH1770_LUX_RANGE) 1059 return -EINVAL; 1060 1061 mutex_lock(&chip->mutex); 1062 *target = thresh; 1063 /* 1064 * Don't update values in HW if we are still waiting for 1065 * first interrupt to come after device handle open call. 1066 */ 1067 if (!chip->lux_wait_result) 1068 ret = bh1770_lux_update_thresholds(chip, 1069 chip->lux_threshold_hi, 1070 chip->lux_threshold_lo); 1071 mutex_unlock(&chip->mutex); 1072 return ret; 1073 1074} 1075 1076static ssize_t bh1770_set_lux_thresh_above(struct device *dev, 1077 struct device_attribute *attr, 1078 const char *buf, size_t len) 1079{ 1080 struct bh1770_chip *chip = dev_get_drvdata(dev); 1081 int ret = bh1770_set_lux_thresh(chip, &chip->lux_threshold_hi, buf); 1082 if (ret < 0) 1083 return ret; 1084 return len; 1085} 1086 1087static ssize_t bh1770_set_lux_thresh_below(struct device *dev, 1088 struct device_attribute *attr, 1089 const char *buf, size_t len) 1090{ 1091 struct bh1770_chip *chip = dev_get_drvdata(dev); 1092 int ret = bh1770_set_lux_thresh(chip, &chip->lux_threshold_lo, buf); 1093 if (ret < 0) 1094 return ret; 1095 return len; 1096} 1097 1098static DEVICE_ATTR(prox0_raw_en, S_IRUGO | S_IWUSR, bh1770_prox_enable_show, 1099 bh1770_prox_enable_store); 1100static DEVICE_ATTR(prox0_thresh_above1_value, S_IRUGO | S_IWUSR, 1101 bh1770_prox_abs_thres_show, 1102 bh1770_prox_abs_thres_store); 1103static DEVICE_ATTR(prox0_thresh_above0_value, S_IRUGO | S_IWUSR, 1104 bh1770_get_prox_thres, 1105 bh1770_set_prox_thres); 1106static DEVICE_ATTR(prox0_raw, S_IRUGO, bh1770_prox_result_show, NULL); 1107static DEVICE_ATTR(prox0_sensor_range, S_IRUGO, bh1770_prox_range_show, NULL); 1108static DEVICE_ATTR(prox0_thresh_above_count, S_IRUGO | S_IWUSR, 1109 bh1770_prox_persistence_show, 1110 bh1770_prox_persistence_store); 1111static DEVICE_ATTR(prox0_rate_above, S_IRUGO | S_IWUSR, 1112 bh1770_get_prox_rate_above, 1113 bh1770_set_prox_rate_above); 1114static DEVICE_ATTR(prox0_rate_below, S_IRUGO | S_IWUSR, 1115 bh1770_get_prox_rate_below, 1116 bh1770_set_prox_rate_below); 1117static DEVICE_ATTR(prox0_rate_avail, S_IRUGO, bh1770_get_prox_rate_avail, NULL); 1118 1119static DEVICE_ATTR(lux0_calibscale, S_IRUGO | S_IWUSR, bh1770_lux_calib_show, 1120 bh1770_lux_calib_store); 1121static DEVICE_ATTR(lux0_calibscale_default, S_IRUGO, 1122 bh1770_lux_calib_default_show, 1123 NULL); 1124static DEVICE_ATTR(lux0_input, S_IRUGO, bh1770_lux_result_show, NULL); 1125static DEVICE_ATTR(lux0_sensor_range, S_IRUGO, bh1770_lux_range_show, NULL); 1126static DEVICE_ATTR(lux0_rate, S_IRUGO | S_IWUSR, bh1770_get_lux_rate, 1127 bh1770_set_lux_rate); 1128static DEVICE_ATTR(lux0_rate_avail, S_IRUGO, bh1770_get_lux_rate_avail, NULL); 1129static DEVICE_ATTR(lux0_thresh_above_value, S_IRUGO | S_IWUSR, 1130 bh1770_get_lux_thresh_above, 1131 bh1770_set_lux_thresh_above); 1132static DEVICE_ATTR(lux0_thresh_below_value, S_IRUGO | S_IWUSR, 1133 bh1770_get_lux_thresh_below, 1134 bh1770_set_lux_thresh_below); 1135static DEVICE_ATTR(chip_id, S_IRUGO, bh1770_chip_id_show, NULL); 1136static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR, bh1770_power_state_show, 1137 bh1770_power_state_store); 1138 1139 1140static struct attribute *sysfs_attrs[] = { 1141 &dev_attr_lux0_calibscale.attr, 1142 &dev_attr_lux0_calibscale_default.attr, 1143 &dev_attr_lux0_input.attr, 1144 &dev_attr_lux0_sensor_range.attr, 1145 &dev_attr_lux0_rate.attr, 1146 &dev_attr_lux0_rate_avail.attr, 1147 &dev_attr_lux0_thresh_above_value.attr, 1148 &dev_attr_lux0_thresh_below_value.attr, 1149 &dev_attr_prox0_raw.attr, 1150 &dev_attr_prox0_sensor_range.attr, 1151 &dev_attr_prox0_raw_en.attr, 1152 &dev_attr_prox0_thresh_above_count.attr, 1153 &dev_attr_prox0_rate_above.attr, 1154 &dev_attr_prox0_rate_below.attr, 1155 &dev_attr_prox0_rate_avail.attr, 1156 &dev_attr_prox0_thresh_above0_value.attr, 1157 &dev_attr_prox0_thresh_above1_value.attr, 1158 &dev_attr_chip_id.attr, 1159 &dev_attr_power_state.attr, 1160 NULL 1161}; 1162 1163static const struct attribute_group bh1770_attribute_group = { 1164 .attrs = sysfs_attrs 1165}; 1166 1167static int bh1770_probe(struct i2c_client *client) 1168{ 1169 struct bh1770_chip *chip; 1170 int err; 1171 1172 chip = devm_kzalloc(&client->dev, sizeof *chip, GFP_KERNEL); 1173 if (!chip) 1174 return -ENOMEM; 1175 1176 i2c_set_clientdata(client, chip); 1177 chip->client = client; 1178 1179 mutex_init(&chip->mutex); 1180 init_waitqueue_head(&chip->wait); 1181 INIT_DELAYED_WORK(&chip->prox_work, bh1770_prox_work); 1182 1183 if (client->dev.platform_data == NULL) { 1184 dev_err(&client->dev, "platform data is mandatory\n"); 1185 return -EINVAL; 1186 } 1187 1188 chip->pdata = client->dev.platform_data; 1189 chip->lux_calib = BH1770_LUX_NEUTRAL_CALIB_VALUE; 1190 chip->lux_rate_index = BH1770_LUX_DEFAULT_RATE; 1191 chip->lux_threshold_lo = BH1770_LUX_DEF_THRES; 1192 chip->lux_threshold_hi = BH1770_LUX_DEF_THRES; 1193 1194 if (chip->pdata->glass_attenuation == 0) 1195 chip->lux_ga = BH1770_NEUTRAL_GA; 1196 else 1197 chip->lux_ga = chip->pdata->glass_attenuation; 1198 1199 chip->prox_threshold = BH1770_PROX_DEF_THRES; 1200 chip->prox_led = chip->pdata->led_def_curr; 1201 chip->prox_abs_thres = BH1770_PROX_DEF_ABS_THRES; 1202 chip->prox_persistence = BH1770_DEFAULT_PERSISTENCE; 1203 chip->prox_rate_threshold = BH1770_PROX_DEF_RATE_THRESH; 1204 chip->prox_rate = BH1770_PROX_DEFAULT_RATE; 1205 chip->prox_data = 0; 1206 1207 chip->regs[0].supply = reg_vcc; 1208 chip->regs[1].supply = reg_vleds; 1209 1210 err = devm_regulator_bulk_get(&client->dev, 1211 ARRAY_SIZE(chip->regs), chip->regs); 1212 if (err < 0) { 1213 dev_err(&client->dev, "Cannot get regulators\n"); 1214 return err; 1215 } 1216 1217 err = regulator_bulk_enable(ARRAY_SIZE(chip->regs), 1218 chip->regs); 1219 if (err < 0) { 1220 dev_err(&client->dev, "Cannot enable regulators\n"); 1221 return err; 1222 } 1223 1224 usleep_range(BH1770_STARTUP_DELAY, BH1770_STARTUP_DELAY * 2); 1225 err = bh1770_detect(chip); 1226 if (err < 0) 1227 goto fail0; 1228 1229 /* Start chip */ 1230 bh1770_chip_on(chip); 1231 pm_runtime_set_active(&client->dev); 1232 pm_runtime_enable(&client->dev); 1233 1234 chip->lux_corr = bh1770_get_corr_value(chip); 1235 if (chip->lux_corr == 0) { 1236 dev_err(&client->dev, "Improper correction values\n"); 1237 err = -EINVAL; 1238 goto fail0; 1239 } 1240 1241 if (chip->pdata->setup_resources) { 1242 err = chip->pdata->setup_resources(); 1243 if (err) { 1244 err = -EINVAL; 1245 goto fail0; 1246 } 1247 } 1248 1249 err = sysfs_create_group(&chip->client->dev.kobj, 1250 &bh1770_attribute_group); 1251 if (err < 0) { 1252 dev_err(&chip->client->dev, "Sysfs registration failed\n"); 1253 goto fail1; 1254 } 1255 1256 /* 1257 * Chip needs level triggered interrupt to work. However, 1258 * level triggering doesn't work always correctly with power 1259 * management. Select both 1260 */ 1261 err = request_threaded_irq(client->irq, NULL, 1262 bh1770_irq, 1263 IRQF_TRIGGER_FALLING | IRQF_ONESHOT | 1264 IRQF_TRIGGER_LOW, 1265 "bh1770", chip); 1266 if (err) { 1267 dev_err(&client->dev, "could not get IRQ %d\n", 1268 client->irq); 1269 goto fail2; 1270 } 1271 regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs); 1272 return err; 1273fail2: 1274 sysfs_remove_group(&chip->client->dev.kobj, 1275 &bh1770_attribute_group); 1276fail1: 1277 if (chip->pdata->release_resources) 1278 chip->pdata->release_resources(); 1279fail0: 1280 regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs); 1281 return err; 1282} 1283 1284static void bh1770_remove(struct i2c_client *client) 1285{ 1286 struct bh1770_chip *chip = i2c_get_clientdata(client); 1287 1288 free_irq(client->irq, chip); 1289 1290 sysfs_remove_group(&chip->client->dev.kobj, 1291 &bh1770_attribute_group); 1292 1293 if (chip->pdata->release_resources) 1294 chip->pdata->release_resources(); 1295 1296 cancel_delayed_work_sync(&chip->prox_work); 1297 1298 if (!pm_runtime_suspended(&client->dev)) 1299 bh1770_chip_off(chip); 1300 1301 pm_runtime_disable(&client->dev); 1302 pm_runtime_set_suspended(&client->dev); 1303} 1304 1305#ifdef CONFIG_PM_SLEEP 1306static int bh1770_suspend(struct device *dev) 1307{ 1308 struct i2c_client *client = to_i2c_client(dev); 1309 struct bh1770_chip *chip = i2c_get_clientdata(client); 1310 1311 bh1770_chip_off(chip); 1312 1313 return 0; 1314} 1315 1316static int bh1770_resume(struct device *dev) 1317{ 1318 struct i2c_client *client = to_i2c_client(dev); 1319 struct bh1770_chip *chip = i2c_get_clientdata(client); 1320 int ret = 0; 1321 1322 bh1770_chip_on(chip); 1323 1324 if (!pm_runtime_suspended(dev)) { 1325 /* 1326 * If we were enabled at suspend time, it is expected 1327 * everything works nice and smoothly 1328 */ 1329 ret = bh1770_lux_rate(chip, chip->lux_rate_index); 1330 ret |= bh1770_lux_interrupt_control(chip, BH1770_ENABLE); 1331 1332 /* This causes interrupt after the next measurement cycle */ 1333 bh1770_lux_update_thresholds(chip, BH1770_LUX_DEF_THRES, 1334 BH1770_LUX_DEF_THRES); 1335 /* Inform that we are waiting for a result from ALS */ 1336 chip->lux_wait_result = true; 1337 bh1770_prox_mode_control(chip); 1338 } 1339 return ret; 1340} 1341#endif 1342 1343#ifdef CONFIG_PM 1344static int bh1770_runtime_suspend(struct device *dev) 1345{ 1346 struct i2c_client *client = to_i2c_client(dev); 1347 struct bh1770_chip *chip = i2c_get_clientdata(client); 1348 1349 bh1770_chip_off(chip); 1350 1351 return 0; 1352} 1353 1354static int bh1770_runtime_resume(struct device *dev) 1355{ 1356 struct i2c_client *client = to_i2c_client(dev); 1357 struct bh1770_chip *chip = i2c_get_clientdata(client); 1358 1359 bh1770_chip_on(chip); 1360 1361 return 0; 1362} 1363#endif 1364 1365static const struct i2c_device_id bh1770_id[] = { 1366 { "bh1770glc" }, 1367 { "sfh7770" }, 1368 {} 1369}; 1370 1371MODULE_DEVICE_TABLE(i2c, bh1770_id); 1372 1373static const struct dev_pm_ops bh1770_pm_ops = { 1374 SET_SYSTEM_SLEEP_PM_OPS(bh1770_suspend, bh1770_resume) 1375 SET_RUNTIME_PM_OPS(bh1770_runtime_suspend, bh1770_runtime_resume, NULL) 1376}; 1377 1378static struct i2c_driver bh1770_driver = { 1379 .driver = { 1380 .name = "bh1770glc", 1381 .pm = &bh1770_pm_ops, 1382 }, 1383 .probe = bh1770_probe, 1384 .remove = bh1770_remove, 1385 .id_table = bh1770_id, 1386}; 1387 1388module_i2c_driver(bh1770_driver); 1389 1390MODULE_DESCRIPTION("BH1770GLC / SFH7770 combined ALS and proximity sensor"); 1391MODULE_AUTHOR("Samu Onkalo, Nokia Corporation"); 1392MODULE_LICENSE("GPL v2");
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