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 pm_runtime_get_sync(dev); 644 645 ret = bh1770_lux_rate(chip, chip->lux_rate_index); 646 if (ret < 0) { 647 pm_runtime_put(dev); 648 goto leave; 649 } 650 651 ret = bh1770_lux_interrupt_control(chip, BH1770_ENABLE); 652 if (ret < 0) { 653 pm_runtime_put(dev); 654 goto leave; 655 } 656 657 /* This causes interrupt after the next measurement cycle */ 658 bh1770_lux_update_thresholds(chip, BH1770_LUX_DEF_THRES, 659 BH1770_LUX_DEF_THRES); 660 /* Inform that we are waiting for a result from ALS */ 661 chip->lux_wait_result = true; 662 bh1770_prox_mode_control(chip); 663 } else if (!pm_runtime_suspended(dev)) { 664 pm_runtime_put(dev); 665 } 666 ret = count; 667leave: 668 mutex_unlock(&chip->mutex); 669 return ret; 670} 671 672static ssize_t bh1770_power_state_show(struct device *dev, 673 struct device_attribute *attr, char *buf) 674{ 675 return sprintf(buf, "%d\n", !pm_runtime_suspended(dev)); 676} 677 678static ssize_t bh1770_lux_result_show(struct device *dev, 679 struct device_attribute *attr, char *buf) 680{ 681 struct bh1770_chip *chip = dev_get_drvdata(dev); 682 ssize_t ret; 683 long timeout; 684 685 if (pm_runtime_suspended(dev)) 686 return -EIO; /* Chip is not enabled at all */ 687 688 timeout = wait_event_interruptible_timeout(chip->wait, 689 !chip->lux_wait_result, 690 msecs_to_jiffies(BH1770_TIMEOUT)); 691 if (!timeout) 692 return -EIO; 693 694 mutex_lock(&chip->mutex); 695 ret = sprintf(buf, "%d\n", bh1770_lux_read_result(chip)); 696 mutex_unlock(&chip->mutex); 697 698 return ret; 699} 700 701static ssize_t bh1770_lux_range_show(struct device *dev, 702 struct device_attribute *attr, char *buf) 703{ 704 return sprintf(buf, "%d\n", BH1770_LUX_RANGE); 705} 706 707static ssize_t bh1770_prox_enable_store(struct device *dev, 708 struct device_attribute *attr, 709 const char *buf, size_t count) 710{ 711 struct bh1770_chip *chip = dev_get_drvdata(dev); 712 unsigned long value; 713 int ret; 714 715 ret = kstrtoul(buf, 0, &value); 716 if (ret) 717 return ret; 718 719 mutex_lock(&chip->mutex); 720 /* Assume no proximity. Sensor will tell real state soon */ 721 if (!chip->prox_enable_count) 722 chip->prox_data = 0; 723 724 if (value) 725 chip->prox_enable_count++; 726 else if (chip->prox_enable_count > 0) 727 chip->prox_enable_count--; 728 else 729 goto leave; 730 731 /* Run control only when chip is powered on */ 732 if (!pm_runtime_suspended(dev)) 733 bh1770_prox_mode_control(chip); 734leave: 735 mutex_unlock(&chip->mutex); 736 return count; 737} 738 739static ssize_t bh1770_prox_enable_show(struct device *dev, 740 struct device_attribute *attr, char *buf) 741{ 742 struct bh1770_chip *chip = dev_get_drvdata(dev); 743 ssize_t len; 744 745 mutex_lock(&chip->mutex); 746 len = sprintf(buf, "%d\n", chip->prox_enable_count); 747 mutex_unlock(&chip->mutex); 748 return len; 749} 750 751static ssize_t bh1770_prox_result_show(struct device *dev, 752 struct device_attribute *attr, char *buf) 753{ 754 struct bh1770_chip *chip = dev_get_drvdata(dev); 755 ssize_t ret; 756 757 mutex_lock(&chip->mutex); 758 if (chip->prox_enable_count && !pm_runtime_suspended(dev)) 759 ret = sprintf(buf, "%d\n", chip->prox_data); 760 else 761 ret = -EIO; 762 mutex_unlock(&chip->mutex); 763 return ret; 764} 765 766static ssize_t bh1770_prox_range_show(struct device *dev, 767 struct device_attribute *attr, char *buf) 768{ 769 return sprintf(buf, "%d\n", BH1770_PROX_RANGE); 770} 771 772static ssize_t bh1770_get_prox_rate_avail(struct device *dev, 773 struct device_attribute *attr, char *buf) 774{ 775 int i; 776 int pos = 0; 777 for (i = 0; i < ARRAY_SIZE(prox_rates_hz); i++) 778 pos += sprintf(buf + pos, "%d ", prox_rates_hz[i]); 779 sprintf(buf + pos - 1, "\n"); 780 return pos; 781} 782 783static ssize_t bh1770_get_prox_rate_above(struct device *dev, 784 struct device_attribute *attr, char *buf) 785{ 786 struct bh1770_chip *chip = dev_get_drvdata(dev); 787 return sprintf(buf, "%d\n", prox_rates_hz[chip->prox_rate_threshold]); 788} 789 790static ssize_t bh1770_get_prox_rate_below(struct device *dev, 791 struct device_attribute *attr, char *buf) 792{ 793 struct bh1770_chip *chip = dev_get_drvdata(dev); 794 return sprintf(buf, "%d\n", prox_rates_hz[chip->prox_rate]); 795} 796 797static int bh1770_prox_rate_validate(int rate) 798{ 799 int i; 800 801 for (i = 0; i < ARRAY_SIZE(prox_rates_hz) - 1; i++) 802 if (rate >= prox_rates_hz[i]) 803 break; 804 return i; 805} 806 807static ssize_t bh1770_set_prox_rate_above(struct device *dev, 808 struct device_attribute *attr, 809 const char *buf, size_t count) 810{ 811 struct bh1770_chip *chip = dev_get_drvdata(dev); 812 unsigned long value; 813 int ret; 814 815 ret = kstrtoul(buf, 0, &value); 816 if (ret) 817 return ret; 818 819 mutex_lock(&chip->mutex); 820 chip->prox_rate_threshold = bh1770_prox_rate_validate(value); 821 mutex_unlock(&chip->mutex); 822 return count; 823} 824 825static ssize_t bh1770_set_prox_rate_below(struct device *dev, 826 struct device_attribute *attr, 827 const char *buf, size_t count) 828{ 829 struct bh1770_chip *chip = dev_get_drvdata(dev); 830 unsigned long value; 831 int ret; 832 833 ret = kstrtoul(buf, 0, &value); 834 if (ret) 835 return ret; 836 837 mutex_lock(&chip->mutex); 838 chip->prox_rate = bh1770_prox_rate_validate(value); 839 mutex_unlock(&chip->mutex); 840 return count; 841} 842 843static ssize_t bh1770_get_prox_thres(struct device *dev, 844 struct device_attribute *attr, char *buf) 845{ 846 struct bh1770_chip *chip = dev_get_drvdata(dev); 847 return sprintf(buf, "%d\n", chip->prox_threshold); 848} 849 850static ssize_t bh1770_set_prox_thres(struct device *dev, 851 struct device_attribute *attr, 852 const char *buf, size_t count) 853{ 854 struct bh1770_chip *chip = dev_get_drvdata(dev); 855 unsigned long value; 856 int ret; 857 858 ret = kstrtoul(buf, 0, &value); 859 if (ret) 860 return ret; 861 862 if (value > BH1770_PROX_RANGE) 863 return -EINVAL; 864 865 mutex_lock(&chip->mutex); 866 chip->prox_threshold = value; 867 ret = bh1770_prox_set_threshold(chip); 868 mutex_unlock(&chip->mutex); 869 if (ret < 0) 870 return ret; 871 return count; 872} 873 874static ssize_t bh1770_prox_persistence_show(struct device *dev, 875 struct device_attribute *attr, char *buf) 876{ 877 struct bh1770_chip *chip = dev_get_drvdata(dev); 878 879 return sprintf(buf, "%u\n", chip->prox_persistence); 880} 881 882static ssize_t bh1770_prox_persistence_store(struct device *dev, 883 struct device_attribute *attr, 884 const char *buf, size_t len) 885{ 886 struct bh1770_chip *chip = dev_get_drvdata(dev); 887 unsigned long value; 888 int ret; 889 890 ret = kstrtoul(buf, 0, &value); 891 if (ret) 892 return ret; 893 894 if (value > BH1770_PROX_MAX_PERSISTENCE) 895 return -EINVAL; 896 897 chip->prox_persistence = value; 898 899 return len; 900} 901 902static ssize_t bh1770_prox_abs_thres_show(struct device *dev, 903 struct device_attribute *attr, char *buf) 904{ 905 struct bh1770_chip *chip = dev_get_drvdata(dev); 906 return sprintf(buf, "%u\n", chip->prox_abs_thres); 907} 908 909static ssize_t bh1770_prox_abs_thres_store(struct device *dev, 910 struct device_attribute *attr, 911 const char *buf, size_t len) 912{ 913 struct bh1770_chip *chip = dev_get_drvdata(dev); 914 unsigned long value; 915 int ret; 916 917 ret = kstrtoul(buf, 0, &value); 918 if (ret) 919 return ret; 920 921 if (value > BH1770_PROX_RANGE) 922 return -EINVAL; 923 924 chip->prox_abs_thres = value; 925 926 return len; 927} 928 929static ssize_t bh1770_chip_id_show(struct device *dev, 930 struct device_attribute *attr, char *buf) 931{ 932 struct bh1770_chip *chip = dev_get_drvdata(dev); 933 return sprintf(buf, "%s rev %d\n", chip->chipname, chip->revision); 934} 935 936static ssize_t bh1770_lux_calib_default_show(struct device *dev, 937 struct device_attribute *attr, char *buf) 938{ 939 return sprintf(buf, "%u\n", BH1770_CALIB_SCALER); 940} 941 942static ssize_t bh1770_lux_calib_show(struct device *dev, 943 struct device_attribute *attr, char *buf) 944{ 945 struct bh1770_chip *chip = dev_get_drvdata(dev); 946 ssize_t len; 947 948 mutex_lock(&chip->mutex); 949 len = sprintf(buf, "%u\n", chip->lux_calib); 950 mutex_unlock(&chip->mutex); 951 return len; 952} 953 954static ssize_t bh1770_lux_calib_store(struct device *dev, 955 struct device_attribute *attr, 956 const char *buf, size_t len) 957{ 958 struct bh1770_chip *chip = dev_get_drvdata(dev); 959 unsigned long value; 960 u32 old_calib; 961 u32 new_corr; 962 int ret; 963 964 ret = kstrtoul(buf, 0, &value); 965 if (ret) 966 return ret; 967 968 mutex_lock(&chip->mutex); 969 old_calib = chip->lux_calib; 970 chip->lux_calib = value; 971 new_corr = bh1770_get_corr_value(chip); 972 if (new_corr == 0) { 973 chip->lux_calib = old_calib; 974 mutex_unlock(&chip->mutex); 975 return -EINVAL; 976 } 977 chip->lux_corr = new_corr; 978 /* Refresh thresholds on HW after changing correction value */ 979 bh1770_lux_update_thresholds(chip, chip->lux_threshold_hi, 980 chip->lux_threshold_lo); 981 982 mutex_unlock(&chip->mutex); 983 984 return len; 985} 986 987static ssize_t bh1770_get_lux_rate_avail(struct device *dev, 988 struct device_attribute *attr, char *buf) 989{ 990 int i; 991 int pos = 0; 992 for (i = 0; i < ARRAY_SIZE(lux_rates_hz); i++) 993 pos += sprintf(buf + pos, "%d ", lux_rates_hz[i]); 994 sprintf(buf + pos - 1, "\n"); 995 return pos; 996} 997 998static ssize_t bh1770_get_lux_rate(struct device *dev, 999 struct device_attribute *attr, char *buf) 1000{ 1001 struct bh1770_chip *chip = dev_get_drvdata(dev); 1002 return sprintf(buf, "%d\n", lux_rates_hz[chip->lux_rate_index]); 1003} 1004 1005static ssize_t bh1770_set_lux_rate(struct device *dev, 1006 struct device_attribute *attr, 1007 const char *buf, size_t count) 1008{ 1009 struct bh1770_chip *chip = dev_get_drvdata(dev); 1010 unsigned long rate_hz; 1011 int ret, i; 1012 1013 ret = kstrtoul(buf, 0, &rate_hz); 1014 if (ret) 1015 return ret; 1016 1017 for (i = 0; i < ARRAY_SIZE(lux_rates_hz) - 1; i++) 1018 if (rate_hz >= lux_rates_hz[i]) 1019 break; 1020 1021 mutex_lock(&chip->mutex); 1022 chip->lux_rate_index = i; 1023 ret = bh1770_lux_rate(chip, i); 1024 mutex_unlock(&chip->mutex); 1025 1026 if (ret < 0) 1027 return ret; 1028 1029 return count; 1030} 1031 1032static ssize_t bh1770_get_lux_thresh_above(struct device *dev, 1033 struct device_attribute *attr, char *buf) 1034{ 1035 struct bh1770_chip *chip = dev_get_drvdata(dev); 1036 return sprintf(buf, "%d\n", chip->lux_threshold_hi); 1037} 1038 1039static ssize_t bh1770_get_lux_thresh_below(struct device *dev, 1040 struct device_attribute *attr, char *buf) 1041{ 1042 struct bh1770_chip *chip = dev_get_drvdata(dev); 1043 return sprintf(buf, "%d\n", chip->lux_threshold_lo); 1044} 1045 1046static ssize_t bh1770_set_lux_thresh(struct bh1770_chip *chip, u16 *target, 1047 const char *buf) 1048{ 1049 unsigned long thresh; 1050 int ret; 1051 1052 ret = kstrtoul(buf, 0, &thresh); 1053 if (ret) 1054 return ret; 1055 1056 if (thresh > BH1770_LUX_RANGE) 1057 return -EINVAL; 1058 1059 mutex_lock(&chip->mutex); 1060 *target = thresh; 1061 /* 1062 * Don't update values in HW if we are still waiting for 1063 * first interrupt to come after device handle open call. 1064 */ 1065 if (!chip->lux_wait_result) 1066 ret = bh1770_lux_update_thresholds(chip, 1067 chip->lux_threshold_hi, 1068 chip->lux_threshold_lo); 1069 mutex_unlock(&chip->mutex); 1070 return ret; 1071 1072} 1073 1074static ssize_t bh1770_set_lux_thresh_above(struct device *dev, 1075 struct device_attribute *attr, 1076 const char *buf, size_t len) 1077{ 1078 struct bh1770_chip *chip = dev_get_drvdata(dev); 1079 int ret = bh1770_set_lux_thresh(chip, &chip->lux_threshold_hi, buf); 1080 if (ret < 0) 1081 return ret; 1082 return len; 1083} 1084 1085static ssize_t bh1770_set_lux_thresh_below(struct device *dev, 1086 struct device_attribute *attr, 1087 const char *buf, size_t len) 1088{ 1089 struct bh1770_chip *chip = dev_get_drvdata(dev); 1090 int ret = bh1770_set_lux_thresh(chip, &chip->lux_threshold_lo, buf); 1091 if (ret < 0) 1092 return ret; 1093 return len; 1094} 1095 1096static DEVICE_ATTR(prox0_raw_en, S_IRUGO | S_IWUSR, bh1770_prox_enable_show, 1097 bh1770_prox_enable_store); 1098static DEVICE_ATTR(prox0_thresh_above1_value, S_IRUGO | S_IWUSR, 1099 bh1770_prox_abs_thres_show, 1100 bh1770_prox_abs_thres_store); 1101static DEVICE_ATTR(prox0_thresh_above0_value, S_IRUGO | S_IWUSR, 1102 bh1770_get_prox_thres, 1103 bh1770_set_prox_thres); 1104static DEVICE_ATTR(prox0_raw, S_IRUGO, bh1770_prox_result_show, NULL); 1105static DEVICE_ATTR(prox0_sensor_range, S_IRUGO, bh1770_prox_range_show, NULL); 1106static DEVICE_ATTR(prox0_thresh_above_count, S_IRUGO | S_IWUSR, 1107 bh1770_prox_persistence_show, 1108 bh1770_prox_persistence_store); 1109static DEVICE_ATTR(prox0_rate_above, S_IRUGO | S_IWUSR, 1110 bh1770_get_prox_rate_above, 1111 bh1770_set_prox_rate_above); 1112static DEVICE_ATTR(prox0_rate_below, S_IRUGO | S_IWUSR, 1113 bh1770_get_prox_rate_below, 1114 bh1770_set_prox_rate_below); 1115static DEVICE_ATTR(prox0_rate_avail, S_IRUGO, bh1770_get_prox_rate_avail, NULL); 1116 1117static DEVICE_ATTR(lux0_calibscale, S_IRUGO | S_IWUSR, bh1770_lux_calib_show, 1118 bh1770_lux_calib_store); 1119static DEVICE_ATTR(lux0_calibscale_default, S_IRUGO, 1120 bh1770_lux_calib_default_show, 1121 NULL); 1122static DEVICE_ATTR(lux0_input, S_IRUGO, bh1770_lux_result_show, NULL); 1123static DEVICE_ATTR(lux0_sensor_range, S_IRUGO, bh1770_lux_range_show, NULL); 1124static DEVICE_ATTR(lux0_rate, S_IRUGO | S_IWUSR, bh1770_get_lux_rate, 1125 bh1770_set_lux_rate); 1126static DEVICE_ATTR(lux0_rate_avail, S_IRUGO, bh1770_get_lux_rate_avail, NULL); 1127static DEVICE_ATTR(lux0_thresh_above_value, S_IRUGO | S_IWUSR, 1128 bh1770_get_lux_thresh_above, 1129 bh1770_set_lux_thresh_above); 1130static DEVICE_ATTR(lux0_thresh_below_value, S_IRUGO | S_IWUSR, 1131 bh1770_get_lux_thresh_below, 1132 bh1770_set_lux_thresh_below); 1133static DEVICE_ATTR(chip_id, S_IRUGO, bh1770_chip_id_show, NULL); 1134static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR, bh1770_power_state_show, 1135 bh1770_power_state_store); 1136 1137 1138static struct attribute *sysfs_attrs[] = { 1139 &dev_attr_lux0_calibscale.attr, 1140 &dev_attr_lux0_calibscale_default.attr, 1141 &dev_attr_lux0_input.attr, 1142 &dev_attr_lux0_sensor_range.attr, 1143 &dev_attr_lux0_rate.attr, 1144 &dev_attr_lux0_rate_avail.attr, 1145 &dev_attr_lux0_thresh_above_value.attr, 1146 &dev_attr_lux0_thresh_below_value.attr, 1147 &dev_attr_prox0_raw.attr, 1148 &dev_attr_prox0_sensor_range.attr, 1149 &dev_attr_prox0_raw_en.attr, 1150 &dev_attr_prox0_thresh_above_count.attr, 1151 &dev_attr_prox0_rate_above.attr, 1152 &dev_attr_prox0_rate_below.attr, 1153 &dev_attr_prox0_rate_avail.attr, 1154 &dev_attr_prox0_thresh_above0_value.attr, 1155 &dev_attr_prox0_thresh_above1_value.attr, 1156 &dev_attr_chip_id.attr, 1157 &dev_attr_power_state.attr, 1158 NULL 1159}; 1160 1161static const struct attribute_group bh1770_attribute_group = { 1162 .attrs = sysfs_attrs 1163}; 1164 1165static int bh1770_probe(struct i2c_client *client) 1166{ 1167 struct bh1770_chip *chip; 1168 int err; 1169 1170 chip = devm_kzalloc(&client->dev, sizeof *chip, GFP_KERNEL); 1171 if (!chip) 1172 return -ENOMEM; 1173 1174 i2c_set_clientdata(client, chip); 1175 chip->client = client; 1176 1177 mutex_init(&chip->mutex); 1178 init_waitqueue_head(&chip->wait); 1179 INIT_DELAYED_WORK(&chip->prox_work, bh1770_prox_work); 1180 1181 if (client->dev.platform_data == NULL) { 1182 dev_err(&client->dev, "platform data is mandatory\n"); 1183 return -EINVAL; 1184 } 1185 1186 chip->pdata = client->dev.platform_data; 1187 chip->lux_calib = BH1770_LUX_NEUTRAL_CALIB_VALUE; 1188 chip->lux_rate_index = BH1770_LUX_DEFAULT_RATE; 1189 chip->lux_threshold_lo = BH1770_LUX_DEF_THRES; 1190 chip->lux_threshold_hi = BH1770_LUX_DEF_THRES; 1191 1192 if (chip->pdata->glass_attenuation == 0) 1193 chip->lux_ga = BH1770_NEUTRAL_GA; 1194 else 1195 chip->lux_ga = chip->pdata->glass_attenuation; 1196 1197 chip->prox_threshold = BH1770_PROX_DEF_THRES; 1198 chip->prox_led = chip->pdata->led_def_curr; 1199 chip->prox_abs_thres = BH1770_PROX_DEF_ABS_THRES; 1200 chip->prox_persistence = BH1770_DEFAULT_PERSISTENCE; 1201 chip->prox_rate_threshold = BH1770_PROX_DEF_RATE_THRESH; 1202 chip->prox_rate = BH1770_PROX_DEFAULT_RATE; 1203 chip->prox_data = 0; 1204 1205 chip->regs[0].supply = reg_vcc; 1206 chip->regs[1].supply = reg_vleds; 1207 1208 err = devm_regulator_bulk_get(&client->dev, 1209 ARRAY_SIZE(chip->regs), chip->regs); 1210 if (err < 0) { 1211 dev_err(&client->dev, "Cannot get regulators\n"); 1212 return err; 1213 } 1214 1215 err = regulator_bulk_enable(ARRAY_SIZE(chip->regs), 1216 chip->regs); 1217 if (err < 0) { 1218 dev_err(&client->dev, "Cannot enable regulators\n"); 1219 return err; 1220 } 1221 1222 usleep_range(BH1770_STARTUP_DELAY, BH1770_STARTUP_DELAY * 2); 1223 err = bh1770_detect(chip); 1224 if (err < 0) 1225 goto fail0; 1226 1227 /* Start chip */ 1228 bh1770_chip_on(chip); 1229 pm_runtime_set_active(&client->dev); 1230 pm_runtime_enable(&client->dev); 1231 1232 chip->lux_corr = bh1770_get_corr_value(chip); 1233 if (chip->lux_corr == 0) { 1234 dev_err(&client->dev, "Improper correction values\n"); 1235 err = -EINVAL; 1236 goto fail0; 1237 } 1238 1239 if (chip->pdata->setup_resources) { 1240 err = chip->pdata->setup_resources(); 1241 if (err) { 1242 err = -EINVAL; 1243 goto fail0; 1244 } 1245 } 1246 1247 err = sysfs_create_group(&chip->client->dev.kobj, 1248 &bh1770_attribute_group); 1249 if (err < 0) { 1250 dev_err(&chip->client->dev, "Sysfs registration failed\n"); 1251 goto fail1; 1252 } 1253 1254 /* 1255 * Chip needs level triggered interrupt to work. However, 1256 * level triggering doesn't work always correctly with power 1257 * management. Select both 1258 */ 1259 err = request_threaded_irq(client->irq, NULL, 1260 bh1770_irq, 1261 IRQF_TRIGGER_FALLING | IRQF_ONESHOT | 1262 IRQF_TRIGGER_LOW, 1263 "bh1770", chip); 1264 if (err) { 1265 dev_err(&client->dev, "could not get IRQ %d\n", 1266 client->irq); 1267 goto fail2; 1268 } 1269 regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs); 1270 return err; 1271fail2: 1272 sysfs_remove_group(&chip->client->dev.kobj, 1273 &bh1770_attribute_group); 1274fail1: 1275 if (chip->pdata->release_resources) 1276 chip->pdata->release_resources(); 1277fail0: 1278 regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs); 1279 return err; 1280} 1281 1282static void bh1770_remove(struct i2c_client *client) 1283{ 1284 struct bh1770_chip *chip = i2c_get_clientdata(client); 1285 1286 free_irq(client->irq, chip); 1287 1288 sysfs_remove_group(&chip->client->dev.kobj, 1289 &bh1770_attribute_group); 1290 1291 if (chip->pdata->release_resources) 1292 chip->pdata->release_resources(); 1293 1294 cancel_delayed_work_sync(&chip->prox_work); 1295 1296 if (!pm_runtime_suspended(&client->dev)) 1297 bh1770_chip_off(chip); 1298 1299 pm_runtime_disable(&client->dev); 1300 pm_runtime_set_suspended(&client->dev); 1301} 1302 1303#ifdef CONFIG_PM_SLEEP 1304static int bh1770_suspend(struct device *dev) 1305{ 1306 struct i2c_client *client = to_i2c_client(dev); 1307 struct bh1770_chip *chip = i2c_get_clientdata(client); 1308 1309 bh1770_chip_off(chip); 1310 1311 return 0; 1312} 1313 1314static int bh1770_resume(struct device *dev) 1315{ 1316 struct i2c_client *client = to_i2c_client(dev); 1317 struct bh1770_chip *chip = i2c_get_clientdata(client); 1318 int ret = 0; 1319 1320 bh1770_chip_on(chip); 1321 1322 if (!pm_runtime_suspended(dev)) { 1323 /* 1324 * If we were enabled at suspend time, it is expected 1325 * everything works nice and smoothly 1326 */ 1327 ret = bh1770_lux_rate(chip, chip->lux_rate_index); 1328 ret |= bh1770_lux_interrupt_control(chip, BH1770_ENABLE); 1329 1330 /* This causes interrupt after the next measurement cycle */ 1331 bh1770_lux_update_thresholds(chip, BH1770_LUX_DEF_THRES, 1332 BH1770_LUX_DEF_THRES); 1333 /* Inform that we are waiting for a result from ALS */ 1334 chip->lux_wait_result = true; 1335 bh1770_prox_mode_control(chip); 1336 } 1337 return ret; 1338} 1339#endif 1340 1341#ifdef CONFIG_PM 1342static int bh1770_runtime_suspend(struct device *dev) 1343{ 1344 struct i2c_client *client = to_i2c_client(dev); 1345 struct bh1770_chip *chip = i2c_get_clientdata(client); 1346 1347 bh1770_chip_off(chip); 1348 1349 return 0; 1350} 1351 1352static int bh1770_runtime_resume(struct device *dev) 1353{ 1354 struct i2c_client *client = to_i2c_client(dev); 1355 struct bh1770_chip *chip = i2c_get_clientdata(client); 1356 1357 bh1770_chip_on(chip); 1358 1359 return 0; 1360} 1361#endif 1362 1363static const struct i2c_device_id bh1770_id[] = { 1364 {"bh1770glc", 0 }, 1365 {"sfh7770", 0 }, 1366 {} 1367}; 1368 1369MODULE_DEVICE_TABLE(i2c, bh1770_id); 1370 1371static const struct dev_pm_ops bh1770_pm_ops = { 1372 SET_SYSTEM_SLEEP_PM_OPS(bh1770_suspend, bh1770_resume) 1373 SET_RUNTIME_PM_OPS(bh1770_runtime_suspend, bh1770_runtime_resume, NULL) 1374}; 1375 1376static struct i2c_driver bh1770_driver = { 1377 .driver = { 1378 .name = "bh1770glc", 1379 .pm = &bh1770_pm_ops, 1380 }, 1381 .probe = bh1770_probe, 1382 .remove = bh1770_remove, 1383 .id_table = bh1770_id, 1384}; 1385 1386module_i2c_driver(bh1770_driver); 1387 1388MODULE_DESCRIPTION("BH1770GLC / SFH7770 combined ALS and proximity sensor"); 1389MODULE_AUTHOR("Samu Onkalo, Nokia Corporation"); 1390MODULE_LICENSE("GPL v2"); 1391