linux/drivers/misc/apds990x.c
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   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * This file is part of the APDS990x 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/regulator/consumer.h>
  17#include <linux/pm_runtime.h>
  18#include <linux/delay.h>
  19#include <linux/wait.h>
  20#include <linux/slab.h>
  21#include <linux/platform_data/apds990x.h>
  22
  23/* Register map */
  24#define APDS990X_ENABLE  0x00 /* Enable of states and interrupts */
  25#define APDS990X_ATIME   0x01 /* ALS ADC time  */
  26#define APDS990X_PTIME   0x02 /* Proximity ADC time  */
  27#define APDS990X_WTIME   0x03 /* Wait time  */
  28#define APDS990X_AILTL   0x04 /* ALS interrupt low threshold low byte */
  29#define APDS990X_AILTH   0x05 /* ALS interrupt low threshold hi byte */
  30#define APDS990X_AIHTL   0x06 /* ALS interrupt hi threshold low byte */
  31#define APDS990X_AIHTH   0x07 /* ALS interrupt hi threshold hi byte */
  32#define APDS990X_PILTL   0x08 /* Proximity interrupt low threshold low byte */
  33#define APDS990X_PILTH   0x09 /* Proximity interrupt low threshold hi byte */
  34#define APDS990X_PIHTL   0x0a /* Proximity interrupt hi threshold low byte */
  35#define APDS990X_PIHTH   0x0b /* Proximity interrupt hi threshold hi byte */
  36#define APDS990X_PERS    0x0c /* Interrupt persistence filters */
  37#define APDS990X_CONFIG  0x0d /* Configuration */
  38#define APDS990X_PPCOUNT 0x0e /* Proximity pulse count */
  39#define APDS990X_CONTROL 0x0f /* Gain control register */
  40#define APDS990X_REV     0x11 /* Revision Number */
  41#define APDS990X_ID      0x12 /* Device ID */
  42#define APDS990X_STATUS  0x13 /* Device status */
  43#define APDS990X_CDATAL  0x14 /* Clear ADC low data register */
  44#define APDS990X_CDATAH  0x15 /* Clear ADC high data register */
  45#define APDS990X_IRDATAL 0x16 /* IR ADC low data register */
  46#define APDS990X_IRDATAH 0x17 /* IR ADC high data register */
  47#define APDS990X_PDATAL  0x18 /* Proximity ADC low data register */
  48#define APDS990X_PDATAH  0x19 /* Proximity ADC high data register */
  49
  50/* Control */
  51#define APDS990X_MAX_AGAIN      3
  52
  53/* Enable register */
  54#define APDS990X_EN_PIEN        (0x1 << 5)
  55#define APDS990X_EN_AIEN        (0x1 << 4)
  56#define APDS990X_EN_WEN         (0x1 << 3)
  57#define APDS990X_EN_PEN         (0x1 << 2)
  58#define APDS990X_EN_AEN         (0x1 << 1)
  59#define APDS990X_EN_PON         (0x1 << 0)
  60#define APDS990X_EN_DISABLE_ALL 0
  61
  62/* Status register */
  63#define APDS990X_ST_PINT        (0x1 << 5)
  64#define APDS990X_ST_AINT        (0x1 << 4)
  65
  66/* I2C access types */
  67#define APDS990x_CMD_TYPE_MASK  (0x03 << 5)
  68#define APDS990x_CMD_TYPE_RB    (0x00 << 5) /* Repeated byte */
  69#define APDS990x_CMD_TYPE_INC   (0x01 << 5) /* Auto increment */
  70#define APDS990x_CMD_TYPE_SPE   (0x03 << 5) /* Special function */
  71
  72#define APDS990x_ADDR_SHIFT     0
  73#define APDS990x_CMD            0x80
  74
  75/* Interrupt ack commands */
  76#define APDS990X_INT_ACK_ALS    0x6
  77#define APDS990X_INT_ACK_PS     0x5
  78#define APDS990X_INT_ACK_BOTH   0x7
  79
  80/* ptime */
  81#define APDS990X_PTIME_DEFAULT  0xff /* Recommended conversion time 2.7ms*/
  82
  83/* wtime */
  84#define APDS990X_WTIME_DEFAULT  0xee /* ~50ms wait time */
  85
  86#define APDS990X_TIME_TO_ADC    1024 /* One timetick as ADC count value */
  87
  88/* Persistence */
  89#define APDS990X_APERS_SHIFT    0
  90#define APDS990X_PPERS_SHIFT    4
  91
  92/* Supported ID:s */
  93#define APDS990X_ID_0           0x0
  94#define APDS990X_ID_4           0x4
  95#define APDS990X_ID_29          0x29
  96
  97/* pgain and pdiode settings */
  98#define APDS_PGAIN_1X          0x0
  99#define APDS_PDIODE_IR         0x2
 100
 101#define APDS990X_LUX_OUTPUT_SCALE 10
 102
 103/* Reverse chip factors for threshold calculation */
 104struct reverse_factors {
 105        u32 afactor;
 106        int cf1;
 107        int irf1;
 108        int cf2;
 109        int irf2;
 110};
 111
 112struct apds990x_chip {
 113        struct apds990x_platform_data   *pdata;
 114        struct i2c_client               *client;
 115        struct mutex                    mutex; /* avoid parallel access */
 116        struct regulator_bulk_data      regs[2];
 117        wait_queue_head_t               wait;
 118
 119        int     prox_en;
 120        bool    prox_continuous_mode;
 121        bool    lux_wait_fresh_res;
 122
 123        /* Chip parameters */
 124        struct  apds990x_chip_factors   cf;
 125        struct  reverse_factors         rcf;
 126        u16     atime;          /* als integration time */
 127        u16     arate;          /* als reporting rate */
 128        u16     a_max_result;   /* Max possible ADC value with current atime */
 129        u8      again_meas;     /* Gain used in last measurement */
 130        u8      again_next;     /* Next calculated gain */
 131        u8      pgain;
 132        u8      pdiode;
 133        u8      pdrive;
 134        u8      lux_persistence;
 135        u8      prox_persistence;
 136
 137        u32     lux_raw;
 138        u32     lux;
 139        u16     lux_clear;
 140        u16     lux_ir;
 141        u16     lux_calib;
 142        u32     lux_thres_hi;
 143        u32     lux_thres_lo;
 144
 145        u32     prox_thres;
 146        u16     prox_data;
 147        u16     prox_calib;
 148
 149        char    chipname[10];
 150        u8      revision;
 151};
 152
 153#define APDS_CALIB_SCALER               8192
 154#define APDS_LUX_NEUTRAL_CALIB_VALUE    (1 * APDS_CALIB_SCALER)
 155#define APDS_PROX_NEUTRAL_CALIB_VALUE   (1 * APDS_CALIB_SCALER)
 156
 157#define APDS_PROX_DEF_THRES             600
 158#define APDS_PROX_HYSTERESIS            50
 159#define APDS_LUX_DEF_THRES_HI           101
 160#define APDS_LUX_DEF_THRES_LO           100
 161#define APDS_DEFAULT_PROX_PERS          1
 162
 163#define APDS_TIMEOUT                    2000
 164#define APDS_STARTUP_DELAY              25000 /* us */
 165#define APDS_RANGE                      65535
 166#define APDS_PROX_RANGE                 1023
 167#define APDS_LUX_GAIN_LO_LIMIT          100
 168#define APDS_LUX_GAIN_LO_LIMIT_STRICT   25
 169
 170#define TIMESTEP                        87 /* 2.7ms is about 87 / 32 */
 171#define TIME_STEP_SCALER                32
 172
 173#define APDS_LUX_AVERAGING_TIME         50 /* tolerates 50/60Hz ripple */
 174#define APDS_LUX_DEFAULT_RATE           200
 175
 176static const u8 again[] = {1, 8, 16, 120}; /* ALS gain steps */
 177
 178/* Following two tables must match i.e 10Hz rate means 1 as persistence value */
 179static const u16 arates_hz[] = {10, 5, 2, 1};
 180static const u8 apersis[] = {1, 2, 4, 5};
 181
 182/* Regulators */
 183static const char reg_vcc[] = "Vdd";
 184static const char reg_vled[] = "Vled";
 185
 186static int apds990x_read_byte(struct apds990x_chip *chip, u8 reg, u8 *data)
 187{
 188        struct i2c_client *client = chip->client;
 189        s32 ret;
 190
 191        reg &= ~APDS990x_CMD_TYPE_MASK;
 192        reg |= APDS990x_CMD | APDS990x_CMD_TYPE_RB;
 193
 194        ret = i2c_smbus_read_byte_data(client, reg);
 195        *data = ret;
 196        return (int)ret;
 197}
 198
 199static int apds990x_read_word(struct apds990x_chip *chip, u8 reg, u16 *data)
 200{
 201        struct i2c_client *client = chip->client;
 202        s32 ret;
 203
 204        reg &= ~APDS990x_CMD_TYPE_MASK;
 205        reg |= APDS990x_CMD | APDS990x_CMD_TYPE_INC;
 206
 207        ret = i2c_smbus_read_word_data(client, reg);
 208        *data = ret;
 209        return (int)ret;
 210}
 211
 212static int apds990x_write_byte(struct apds990x_chip *chip, u8 reg, u8 data)
 213{
 214        struct i2c_client *client = chip->client;
 215        s32 ret;
 216
 217        reg &= ~APDS990x_CMD_TYPE_MASK;
 218        reg |= APDS990x_CMD | APDS990x_CMD_TYPE_RB;
 219
 220        ret = i2c_smbus_write_byte_data(client, reg, data);
 221        return (int)ret;
 222}
 223
 224static int apds990x_write_word(struct apds990x_chip *chip, u8 reg, u16 data)
 225{
 226        struct i2c_client *client = chip->client;
 227        s32 ret;
 228
 229        reg &= ~APDS990x_CMD_TYPE_MASK;
 230        reg |= APDS990x_CMD | APDS990x_CMD_TYPE_INC;
 231
 232        ret = i2c_smbus_write_word_data(client, reg, data);
 233        return (int)ret;
 234}
 235
 236static int apds990x_mode_on(struct apds990x_chip *chip)
 237{
 238        /* ALS is mandatory, proximity optional */
 239        u8 reg = APDS990X_EN_AIEN | APDS990X_EN_PON | APDS990X_EN_AEN |
 240                APDS990X_EN_WEN;
 241
 242        if (chip->prox_en)
 243                reg |= APDS990X_EN_PIEN | APDS990X_EN_PEN;
 244
 245        return apds990x_write_byte(chip, APDS990X_ENABLE, reg);
 246}
 247
 248static u16 apds990x_lux_to_threshold(struct apds990x_chip *chip, u32 lux)
 249{
 250        u32 thres;
 251        u32 cpl;
 252        u32 ir;
 253
 254        if (lux == 0)
 255                return 0;
 256        else if (lux == APDS_RANGE)
 257                return APDS_RANGE;
 258
 259        /*
 260         * Reported LUX value is a combination of the IR and CLEAR channel
 261         * values. However, interrupt threshold is only for clear channel.
 262         * This function approximates needed HW threshold value for a given
 263         * LUX value in the current lightning type.
 264         * IR level compared to visible light varies heavily depending on the
 265         * source of the light
 266         *
 267         * Calculate threshold value for the next measurement period.
 268         * Math: threshold = lux * cpl where
 269         * cpl = atime * again / (glass_attenuation * device_factor)
 270         * (count-per-lux)
 271         *
 272         * First remove calibration. Division by four is to avoid overflow
 273         */
 274        lux = lux * (APDS_CALIB_SCALER / 4) / (chip->lux_calib / 4);
 275
 276        /* Multiplication by 64 is to increase accuracy */
 277        cpl = ((u32)chip->atime * (u32)again[chip->again_next] *
 278                APDS_PARAM_SCALE * 64) / (chip->cf.ga * chip->cf.df);
 279
 280        thres = lux * cpl / 64;
 281        /*
 282         * Convert IR light from the latest result to match with
 283         * new gain step. This helps to adapt with the current
 284         * source of light.
 285         */
 286        ir = (u32)chip->lux_ir * (u32)again[chip->again_next] /
 287                (u32)again[chip->again_meas];
 288
 289        /*
 290         * Compensate count with IR light impact
 291         * IAC1 > IAC2 (see apds990x_get_lux for formulas)
 292         */
 293        if (chip->lux_clear * APDS_PARAM_SCALE >=
 294                chip->rcf.afactor * chip->lux_ir)
 295                thres = (chip->rcf.cf1 * thres + chip->rcf.irf1 * ir) /
 296                        APDS_PARAM_SCALE;
 297        else
 298                thres = (chip->rcf.cf2 * thres + chip->rcf.irf2 * ir) /
 299                        APDS_PARAM_SCALE;
 300
 301        if (thres >= chip->a_max_result)
 302                thres = chip->a_max_result - 1;
 303        return thres;
 304}
 305
 306static inline int apds990x_set_atime(struct apds990x_chip *chip, u32 time_ms)
 307{
 308        u8 reg_value;
 309
 310        chip->atime = time_ms;
 311        /* Formula is specified in the data sheet */
 312        reg_value = 256 - ((time_ms * TIME_STEP_SCALER) / TIMESTEP);
 313        /* Calculate max ADC value for given integration time */
 314        chip->a_max_result = (u16)(256 - reg_value) * APDS990X_TIME_TO_ADC;
 315        return apds990x_write_byte(chip, APDS990X_ATIME, reg_value);
 316}
 317
 318/* Called always with mutex locked */
 319static int apds990x_refresh_pthres(struct apds990x_chip *chip, int data)
 320{
 321        int ret, lo, hi;
 322
 323        /* If the chip is not in use, don't try to access it */
 324        if (pm_runtime_suspended(&chip->client->dev))
 325                return 0;
 326
 327        if (data < chip->prox_thres) {
 328                lo = 0;
 329                hi = chip->prox_thres;
 330        } else {
 331                lo = chip->prox_thres - APDS_PROX_HYSTERESIS;
 332                if (chip->prox_continuous_mode)
 333                        hi = chip->prox_thres;
 334                else
 335                        hi = APDS_RANGE;
 336        }
 337
 338        ret = apds990x_write_word(chip, APDS990X_PILTL, lo);
 339        ret |= apds990x_write_word(chip, APDS990X_PIHTL, hi);
 340        return ret;
 341}
 342
 343/* Called always with mutex locked */
 344static int apds990x_refresh_athres(struct apds990x_chip *chip)
 345{
 346        int ret;
 347        /* If the chip is not in use, don't try to access it */
 348        if (pm_runtime_suspended(&chip->client->dev))
 349                return 0;
 350
 351        ret = apds990x_write_word(chip, APDS990X_AILTL,
 352                        apds990x_lux_to_threshold(chip, chip->lux_thres_lo));
 353        ret |= apds990x_write_word(chip, APDS990X_AIHTL,
 354                        apds990x_lux_to_threshold(chip, chip->lux_thres_hi));
 355
 356        return ret;
 357}
 358
 359/* Called always with mutex locked */
 360static void apds990x_force_a_refresh(struct apds990x_chip *chip)
 361{
 362        /* This will force ALS interrupt after the next measurement. */
 363        apds990x_write_word(chip, APDS990X_AILTL, APDS_LUX_DEF_THRES_LO);
 364        apds990x_write_word(chip, APDS990X_AIHTL, APDS_LUX_DEF_THRES_HI);
 365}
 366
 367/* Called always with mutex locked */
 368static void apds990x_force_p_refresh(struct apds990x_chip *chip)
 369{
 370        /* This will force proximity interrupt after the next measurement. */
 371        apds990x_write_word(chip, APDS990X_PILTL, APDS_PROX_DEF_THRES - 1);
 372        apds990x_write_word(chip, APDS990X_PIHTL, APDS_PROX_DEF_THRES);
 373}
 374
 375/* Called always with mutex locked */
 376static int apds990x_calc_again(struct apds990x_chip *chip)
 377{
 378        int curr_again = chip->again_meas;
 379        int next_again = chip->again_meas;
 380        int ret = 0;
 381
 382        /* Calculate suitable als gain */
 383        if (chip->lux_clear == chip->a_max_result)
 384                next_again -= 2; /* ALS saturated. Decrease gain by 2 steps */
 385        else if (chip->lux_clear > chip->a_max_result / 2)
 386                next_again--;
 387        else if (chip->lux_clear < APDS_LUX_GAIN_LO_LIMIT_STRICT)
 388                next_again += 2; /* Too dark. Increase gain by 2 steps */
 389        else if (chip->lux_clear < APDS_LUX_GAIN_LO_LIMIT)
 390                next_again++;
 391
 392        /* Limit gain to available range */
 393        if (next_again < 0)
 394                next_again = 0;
 395        else if (next_again > APDS990X_MAX_AGAIN)
 396                next_again = APDS990X_MAX_AGAIN;
 397
 398        /* Let's check can we trust the measured result */
 399        if (chip->lux_clear == chip->a_max_result)
 400                /* Result can be totally garbage due to saturation */
 401                ret = -ERANGE;
 402        else if (next_again != curr_again &&
 403                chip->lux_clear < APDS_LUX_GAIN_LO_LIMIT_STRICT)
 404                /*
 405                 * Gain is changed and measurement result is very small.
 406                 * Result can be totally garbage due to underflow
 407                 */
 408                ret = -ERANGE;
 409
 410        chip->again_next = next_again;
 411        apds990x_write_byte(chip, APDS990X_CONTROL,
 412                        (chip->pdrive << 6) |
 413                        (chip->pdiode << 4) |
 414                        (chip->pgain << 2) |
 415                        (chip->again_next << 0));
 416
 417        /*
 418         * Error means bad result -> re-measurement is needed. The forced
 419         * refresh uses fastest possible persistence setting to get result
 420         * as soon as possible.
 421         */
 422        if (ret < 0)
 423                apds990x_force_a_refresh(chip);
 424        else
 425                apds990x_refresh_athres(chip);
 426
 427        return ret;
 428}
 429
 430/* Called always with mutex locked */
 431static int apds990x_get_lux(struct apds990x_chip *chip, int clear, int ir)
 432{
 433        int iac, iac1, iac2; /* IR adjusted counts */
 434        u32 lpc; /* Lux per count */
 435
 436        /* Formulas:
 437         * iac1 = CF1 * CLEAR_CH - IRF1 * IR_CH
 438         * iac2 = CF2 * CLEAR_CH - IRF2 * IR_CH
 439         */
 440        iac1 = (chip->cf.cf1 * clear - chip->cf.irf1 * ir) / APDS_PARAM_SCALE;
 441        iac2 = (chip->cf.cf2 * clear - chip->cf.irf2 * ir) / APDS_PARAM_SCALE;
 442
 443        iac = max(iac1, iac2);
 444        iac = max(iac, 0);
 445
 446        lpc = APDS990X_LUX_OUTPUT_SCALE * (chip->cf.df * chip->cf.ga) /
 447                (u32)(again[chip->again_meas] * (u32)chip->atime);
 448
 449        return (iac * lpc) / APDS_PARAM_SCALE;
 450}
 451
 452static int apds990x_ack_int(struct apds990x_chip *chip, u8 mode)
 453{
 454        struct i2c_client *client = chip->client;
 455        s32 ret;
 456        u8 reg = APDS990x_CMD | APDS990x_CMD_TYPE_SPE;
 457
 458        switch (mode & (APDS990X_ST_AINT | APDS990X_ST_PINT)) {
 459        case APDS990X_ST_AINT:
 460                reg |= APDS990X_INT_ACK_ALS;
 461                break;
 462        case APDS990X_ST_PINT:
 463                reg |= APDS990X_INT_ACK_PS;
 464                break;
 465        default:
 466                reg |= APDS990X_INT_ACK_BOTH;
 467                break;
 468        }
 469
 470        ret = i2c_smbus_read_byte_data(client, reg);
 471        return (int)ret;
 472}
 473
 474static irqreturn_t apds990x_irq(int irq, void *data)
 475{
 476        struct apds990x_chip *chip = data;
 477        u8 status;
 478
 479        apds990x_read_byte(chip, APDS990X_STATUS, &status);
 480        apds990x_ack_int(chip, status);
 481
 482        mutex_lock(&chip->mutex);
 483        if (!pm_runtime_suspended(&chip->client->dev)) {
 484                if (status & APDS990X_ST_AINT) {
 485                        apds990x_read_word(chip, APDS990X_CDATAL,
 486                                        &chip->lux_clear);
 487                        apds990x_read_word(chip, APDS990X_IRDATAL,
 488                                        &chip->lux_ir);
 489                        /* Store used gain for calculations */
 490                        chip->again_meas = chip->again_next;
 491
 492                        chip->lux_raw = apds990x_get_lux(chip,
 493                                                        chip->lux_clear,
 494                                                        chip->lux_ir);
 495
 496                        if (apds990x_calc_again(chip) == 0) {
 497                                /* Result is valid */
 498                                chip->lux = chip->lux_raw;
 499                                chip->lux_wait_fresh_res = false;
 500                                wake_up(&chip->wait);
 501                                sysfs_notify(&chip->client->dev.kobj,
 502                                        NULL, "lux0_input");
 503                        }
 504                }
 505
 506                if ((status & APDS990X_ST_PINT) && chip->prox_en) {
 507                        u16 clr_ch;
 508
 509                        apds990x_read_word(chip, APDS990X_CDATAL, &clr_ch);
 510                        /*
 511                         * If ALS channel is saturated at min gain,
 512                         * proximity gives false posivite values.
 513                         * Just ignore them.
 514                         */
 515                        if (chip->again_meas == 0 &&
 516                                clr_ch == chip->a_max_result)
 517                                chip->prox_data = 0;
 518                        else
 519                                apds990x_read_word(chip,
 520                                                APDS990X_PDATAL,
 521                                                &chip->prox_data);
 522
 523                        apds990x_refresh_pthres(chip, chip->prox_data);
 524                        if (chip->prox_data < chip->prox_thres)
 525                                chip->prox_data = 0;
 526                        else if (!chip->prox_continuous_mode)
 527                                chip->prox_data = APDS_PROX_RANGE;
 528                        sysfs_notify(&chip->client->dev.kobj,
 529                                NULL, "prox0_raw");
 530                }
 531        }
 532        mutex_unlock(&chip->mutex);
 533        return IRQ_HANDLED;
 534}
 535
 536static int apds990x_configure(struct apds990x_chip *chip)
 537{
 538        /* It is recommended to use disabled mode during these operations */
 539        apds990x_write_byte(chip, APDS990X_ENABLE, APDS990X_EN_DISABLE_ALL);
 540
 541        /* conversion and wait times for different state machince states */
 542        apds990x_write_byte(chip, APDS990X_PTIME, APDS990X_PTIME_DEFAULT);
 543        apds990x_write_byte(chip, APDS990X_WTIME, APDS990X_WTIME_DEFAULT);
 544        apds990x_set_atime(chip, APDS_LUX_AVERAGING_TIME);
 545
 546        apds990x_write_byte(chip, APDS990X_CONFIG, 0);
 547
 548        /* Persistence levels */
 549        apds990x_write_byte(chip, APDS990X_PERS,
 550                        (chip->lux_persistence << APDS990X_APERS_SHIFT) |
 551                        (chip->prox_persistence << APDS990X_PPERS_SHIFT));
 552
 553        apds990x_write_byte(chip, APDS990X_PPCOUNT, chip->pdata->ppcount);
 554
 555        /* Start with relatively small gain */
 556        chip->again_meas = 1;
 557        chip->again_next = 1;
 558        apds990x_write_byte(chip, APDS990X_CONTROL,
 559                        (chip->pdrive << 6) |
 560                        (chip->pdiode << 4) |
 561                        (chip->pgain << 2) |
 562                        (chip->again_next << 0));
 563        return 0;
 564}
 565
 566static int apds990x_detect(struct apds990x_chip *chip)
 567{
 568        struct i2c_client *client = chip->client;
 569        int ret;
 570        u8 id;
 571
 572        ret = apds990x_read_byte(chip, APDS990X_ID, &id);
 573        if (ret < 0) {
 574                dev_err(&client->dev, "ID read failed\n");
 575                return ret;
 576        }
 577
 578        ret = apds990x_read_byte(chip, APDS990X_REV, &chip->revision);
 579        if (ret < 0) {
 580                dev_err(&client->dev, "REV read failed\n");
 581                return ret;
 582        }
 583
 584        switch (id) {
 585        case APDS990X_ID_0:
 586        case APDS990X_ID_4:
 587        case APDS990X_ID_29:
 588                snprintf(chip->chipname, sizeof(chip->chipname), "APDS-990x");
 589                break;
 590        default:
 591                ret = -ENODEV;
 592                break;
 593        }
 594        return ret;
 595}
 596
 597#ifdef CONFIG_PM
 598static int apds990x_chip_on(struct apds990x_chip *chip)
 599{
 600        int err  = regulator_bulk_enable(ARRAY_SIZE(chip->regs),
 601                                        chip->regs);
 602        if (err < 0)
 603                return err;
 604
 605        usleep_range(APDS_STARTUP_DELAY, 2 * APDS_STARTUP_DELAY);
 606
 607        /* Refresh all configs in case of regulators were off */
 608        chip->prox_data = 0;
 609        apds990x_configure(chip);
 610        apds990x_mode_on(chip);
 611        return 0;
 612}
 613#endif
 614
 615static int apds990x_chip_off(struct apds990x_chip *chip)
 616{
 617        apds990x_write_byte(chip, APDS990X_ENABLE, APDS990X_EN_DISABLE_ALL);
 618        regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs);
 619        return 0;
 620}
 621
 622static ssize_t apds990x_lux_show(struct device *dev,
 623                                 struct device_attribute *attr, char *buf)
 624{
 625        struct apds990x_chip *chip = dev_get_drvdata(dev);
 626        ssize_t ret;
 627        u32 result;
 628        long timeout;
 629
 630        if (pm_runtime_suspended(dev))
 631                return -EIO;
 632
 633        timeout = wait_event_interruptible_timeout(chip->wait,
 634                                                !chip->lux_wait_fresh_res,
 635                                                msecs_to_jiffies(APDS_TIMEOUT));
 636        if (!timeout)
 637                return -EIO;
 638
 639        mutex_lock(&chip->mutex);
 640        result = (chip->lux * chip->lux_calib) / APDS_CALIB_SCALER;
 641        if (result > (APDS_RANGE * APDS990X_LUX_OUTPUT_SCALE))
 642                result = APDS_RANGE * APDS990X_LUX_OUTPUT_SCALE;
 643
 644        ret = sprintf(buf, "%d.%d\n",
 645                result / APDS990X_LUX_OUTPUT_SCALE,
 646                result % APDS990X_LUX_OUTPUT_SCALE);
 647        mutex_unlock(&chip->mutex);
 648        return ret;
 649}
 650
 651static DEVICE_ATTR(lux0_input, S_IRUGO, apds990x_lux_show, NULL);
 652
 653static ssize_t apds990x_lux_range_show(struct device *dev,
 654                                 struct device_attribute *attr, char *buf)
 655{
 656        return sprintf(buf, "%u\n", APDS_RANGE);
 657}
 658
 659static DEVICE_ATTR(lux0_sensor_range, S_IRUGO, apds990x_lux_range_show, NULL);
 660
 661static ssize_t apds990x_lux_calib_format_show(struct device *dev,
 662                                 struct device_attribute *attr, char *buf)
 663{
 664        return sprintf(buf, "%u\n", APDS_CALIB_SCALER);
 665}
 666
 667static DEVICE_ATTR(lux0_calibscale_default, S_IRUGO,
 668                apds990x_lux_calib_format_show, NULL);
 669
 670static ssize_t apds990x_lux_calib_show(struct device *dev,
 671                                 struct device_attribute *attr, char *buf)
 672{
 673        struct apds990x_chip *chip = dev_get_drvdata(dev);
 674
 675        return sprintf(buf, "%u\n", chip->lux_calib);
 676}
 677
 678static ssize_t apds990x_lux_calib_store(struct device *dev,
 679                                  struct device_attribute *attr,
 680                                  const char *buf, size_t len)
 681{
 682        struct apds990x_chip *chip = dev_get_drvdata(dev);
 683        unsigned long value;
 684        int ret;
 685
 686        ret = kstrtoul(buf, 0, &value);
 687        if (ret)
 688                return ret;
 689
 690        chip->lux_calib = value;
 691
 692        return len;
 693}
 694
 695static DEVICE_ATTR(lux0_calibscale, S_IRUGO | S_IWUSR, apds990x_lux_calib_show,
 696                apds990x_lux_calib_store);
 697
 698static ssize_t apds990x_rate_avail(struct device *dev,
 699                                   struct device_attribute *attr, char *buf)
 700{
 701        int i;
 702        int pos = 0;
 703
 704        for (i = 0; i < ARRAY_SIZE(arates_hz); i++)
 705                pos += sprintf(buf + pos, "%d ", arates_hz[i]);
 706        sprintf(buf + pos - 1, "\n");
 707        return pos;
 708}
 709
 710static ssize_t apds990x_rate_show(struct device *dev,
 711                                   struct device_attribute *attr, char *buf)
 712{
 713        struct apds990x_chip *chip =  dev_get_drvdata(dev);
 714
 715        return sprintf(buf, "%d\n", chip->arate);
 716}
 717
 718static int apds990x_set_arate(struct apds990x_chip *chip, int rate)
 719{
 720        int i;
 721
 722        for (i = 0; i < ARRAY_SIZE(arates_hz); i++)
 723                if (rate >= arates_hz[i])
 724                        break;
 725
 726        if (i == ARRAY_SIZE(arates_hz))
 727                return -EINVAL;
 728
 729        /* Pick up corresponding persistence value */
 730        chip->lux_persistence = apersis[i];
 731        chip->arate = arates_hz[i];
 732
 733        /* If the chip is not in use, don't try to access it */
 734        if (pm_runtime_suspended(&chip->client->dev))
 735                return 0;
 736
 737        /* Persistence levels */
 738        return apds990x_write_byte(chip, APDS990X_PERS,
 739                        (chip->lux_persistence << APDS990X_APERS_SHIFT) |
 740                        (chip->prox_persistence << APDS990X_PPERS_SHIFT));
 741}
 742
 743static ssize_t apds990x_rate_store(struct device *dev,
 744                                  struct device_attribute *attr,
 745                                  const char *buf, size_t len)
 746{
 747        struct apds990x_chip *chip =  dev_get_drvdata(dev);
 748        unsigned long value;
 749        int ret;
 750
 751        ret = kstrtoul(buf, 0, &value);
 752        if (ret)
 753                return ret;
 754
 755        mutex_lock(&chip->mutex);
 756        ret = apds990x_set_arate(chip, value);
 757        mutex_unlock(&chip->mutex);
 758
 759        if (ret < 0)
 760                return ret;
 761        return len;
 762}
 763
 764static DEVICE_ATTR(lux0_rate_avail, S_IRUGO, apds990x_rate_avail, NULL);
 765
 766static DEVICE_ATTR(lux0_rate, S_IRUGO | S_IWUSR, apds990x_rate_show,
 767                                                 apds990x_rate_store);
 768
 769static ssize_t apds990x_prox_show(struct device *dev,
 770                                 struct device_attribute *attr, char *buf)
 771{
 772        ssize_t ret;
 773        struct apds990x_chip *chip =  dev_get_drvdata(dev);
 774
 775        if (pm_runtime_suspended(dev) || !chip->prox_en)
 776                return -EIO;
 777
 778        mutex_lock(&chip->mutex);
 779        ret = sprintf(buf, "%d\n", chip->prox_data);
 780        mutex_unlock(&chip->mutex);
 781        return ret;
 782}
 783
 784static DEVICE_ATTR(prox0_raw, S_IRUGO, apds990x_prox_show, NULL);
 785
 786static ssize_t apds990x_prox_range_show(struct device *dev,
 787                                 struct device_attribute *attr, char *buf)
 788{
 789        return sprintf(buf, "%u\n", APDS_PROX_RANGE);
 790}
 791
 792static DEVICE_ATTR(prox0_sensor_range, S_IRUGO, apds990x_prox_range_show, NULL);
 793
 794static ssize_t apds990x_prox_enable_show(struct device *dev,
 795                                   struct device_attribute *attr, char *buf)
 796{
 797        struct apds990x_chip *chip =  dev_get_drvdata(dev);
 798
 799        return sprintf(buf, "%d\n", chip->prox_en);
 800}
 801
 802static ssize_t apds990x_prox_enable_store(struct device *dev,
 803                                  struct device_attribute *attr,
 804                                  const char *buf, size_t len)
 805{
 806        struct apds990x_chip *chip =  dev_get_drvdata(dev);
 807        unsigned long value;
 808        int ret;
 809
 810        ret = kstrtoul(buf, 0, &value);
 811        if (ret)
 812                return ret;
 813
 814        mutex_lock(&chip->mutex);
 815
 816        if (!chip->prox_en)
 817                chip->prox_data = 0;
 818
 819        if (value)
 820                chip->prox_en++;
 821        else if (chip->prox_en > 0)
 822                chip->prox_en--;
 823
 824        if (!pm_runtime_suspended(dev))
 825                apds990x_mode_on(chip);
 826        mutex_unlock(&chip->mutex);
 827        return len;
 828}
 829
 830static DEVICE_ATTR(prox0_raw_en, S_IRUGO | S_IWUSR, apds990x_prox_enable_show,
 831                                                   apds990x_prox_enable_store);
 832
 833static const char *reporting_modes[] = {"trigger", "periodic"};
 834
 835static ssize_t apds990x_prox_reporting_mode_show(struct device *dev,
 836                                   struct device_attribute *attr, char *buf)
 837{
 838        struct apds990x_chip *chip =  dev_get_drvdata(dev);
 839
 840        return sprintf(buf, "%s\n",
 841                reporting_modes[!!chip->prox_continuous_mode]);
 842}
 843
 844static ssize_t apds990x_prox_reporting_mode_store(struct device *dev,
 845                                  struct device_attribute *attr,
 846                                  const char *buf, size_t len)
 847{
 848        struct apds990x_chip *chip =  dev_get_drvdata(dev);
 849        int ret;
 850
 851        ret = sysfs_match_string(reporting_modes, buf);
 852        if (ret < 0)
 853                return ret;
 854
 855        chip->prox_continuous_mode = ret;
 856        return len;
 857}
 858
 859static DEVICE_ATTR(prox0_reporting_mode, S_IRUGO | S_IWUSR,
 860                apds990x_prox_reporting_mode_show,
 861                apds990x_prox_reporting_mode_store);
 862
 863static ssize_t apds990x_prox_reporting_avail_show(struct device *dev,
 864                                   struct device_attribute *attr, char *buf)
 865{
 866        return sprintf(buf, "%s %s\n", reporting_modes[0], reporting_modes[1]);
 867}
 868
 869static DEVICE_ATTR(prox0_reporting_mode_avail, S_IRUGO | S_IWUSR,
 870                apds990x_prox_reporting_avail_show, NULL);
 871
 872
 873static ssize_t apds990x_lux_thresh_above_show(struct device *dev,
 874                                   struct device_attribute *attr, char *buf)
 875{
 876        struct apds990x_chip *chip =  dev_get_drvdata(dev);
 877
 878        return sprintf(buf, "%d\n", chip->lux_thres_hi);
 879}
 880
 881static ssize_t apds990x_lux_thresh_below_show(struct device *dev,
 882                                   struct device_attribute *attr, char *buf)
 883{
 884        struct apds990x_chip *chip =  dev_get_drvdata(dev);
 885
 886        return sprintf(buf, "%d\n", chip->lux_thres_lo);
 887}
 888
 889static ssize_t apds990x_set_lux_thresh(struct apds990x_chip *chip, u32 *target,
 890                                const char *buf)
 891{
 892        unsigned long thresh;
 893        int ret;
 894
 895        ret = kstrtoul(buf, 0, &thresh);
 896        if (ret)
 897                return ret;
 898
 899        if (thresh > APDS_RANGE)
 900                return -EINVAL;
 901
 902        mutex_lock(&chip->mutex);
 903        *target = thresh;
 904        /*
 905         * Don't update values in HW if we are still waiting for
 906         * first interrupt to come after device handle open call.
 907         */
 908        if (!chip->lux_wait_fresh_res)
 909                apds990x_refresh_athres(chip);
 910        mutex_unlock(&chip->mutex);
 911        return ret;
 912
 913}
 914
 915static ssize_t apds990x_lux_thresh_above_store(struct device *dev,
 916                                  struct device_attribute *attr,
 917                                  const char *buf, size_t len)
 918{
 919        struct apds990x_chip *chip =  dev_get_drvdata(dev);
 920        int ret = apds990x_set_lux_thresh(chip, &chip->lux_thres_hi, buf);
 921
 922        if (ret < 0)
 923                return ret;
 924        return len;
 925}
 926
 927static ssize_t apds990x_lux_thresh_below_store(struct device *dev,
 928                                  struct device_attribute *attr,
 929                                  const char *buf, size_t len)
 930{
 931        struct apds990x_chip *chip =  dev_get_drvdata(dev);
 932        int ret = apds990x_set_lux_thresh(chip, &chip->lux_thres_lo, buf);
 933
 934        if (ret < 0)
 935                return ret;
 936        return len;
 937}
 938
 939static DEVICE_ATTR(lux0_thresh_above_value, S_IRUGO | S_IWUSR,
 940                apds990x_lux_thresh_above_show,
 941                apds990x_lux_thresh_above_store);
 942
 943static DEVICE_ATTR(lux0_thresh_below_value, S_IRUGO | S_IWUSR,
 944                apds990x_lux_thresh_below_show,
 945                apds990x_lux_thresh_below_store);
 946
 947static ssize_t apds990x_prox_threshold_show(struct device *dev,
 948                                   struct device_attribute *attr, char *buf)
 949{
 950        struct apds990x_chip *chip =  dev_get_drvdata(dev);
 951
 952        return sprintf(buf, "%d\n", chip->prox_thres);
 953}
 954
 955static ssize_t apds990x_prox_threshold_store(struct device *dev,
 956                                  struct device_attribute *attr,
 957                                  const char *buf, size_t len)
 958{
 959        struct apds990x_chip *chip =  dev_get_drvdata(dev);
 960        unsigned long value;
 961        int ret;
 962
 963        ret = kstrtoul(buf, 0, &value);
 964        if (ret)
 965                return ret;
 966
 967        if ((value > APDS_RANGE) || (value == 0) ||
 968                (value < APDS_PROX_HYSTERESIS))
 969                return -EINVAL;
 970
 971        mutex_lock(&chip->mutex);
 972        chip->prox_thres = value;
 973
 974        apds990x_force_p_refresh(chip);
 975        mutex_unlock(&chip->mutex);
 976        return len;
 977}
 978
 979static DEVICE_ATTR(prox0_thresh_above_value, S_IRUGO | S_IWUSR,
 980                apds990x_prox_threshold_show,
 981                apds990x_prox_threshold_store);
 982
 983static ssize_t apds990x_power_state_show(struct device *dev,
 984                                   struct device_attribute *attr, char *buf)
 985{
 986        return sprintf(buf, "%d\n", !pm_runtime_suspended(dev));
 987        return 0;
 988}
 989
 990static ssize_t apds990x_power_state_store(struct device *dev,
 991                                  struct device_attribute *attr,
 992                                  const char *buf, size_t len)
 993{
 994        struct apds990x_chip *chip =  dev_get_drvdata(dev);
 995        unsigned long value;
 996        int ret;
 997
 998        ret = kstrtoul(buf, 0, &value);
 999        if (ret)
1000                return ret;
1001
1002        if (value) {
1003                pm_runtime_get_sync(dev);
1004                mutex_lock(&chip->mutex);
1005                chip->lux_wait_fresh_res = true;
1006                apds990x_force_a_refresh(chip);
1007                apds990x_force_p_refresh(chip);
1008                mutex_unlock(&chip->mutex);
1009        } else {
1010                if (!pm_runtime_suspended(dev))
1011                        pm_runtime_put(dev);
1012        }
1013        return len;
1014}
1015
1016static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR,
1017                apds990x_power_state_show,
1018                apds990x_power_state_store);
1019
1020static ssize_t apds990x_chip_id_show(struct device *dev,
1021                                   struct device_attribute *attr, char *buf)
1022{
1023        struct apds990x_chip *chip =  dev_get_drvdata(dev);
1024
1025        return sprintf(buf, "%s %d\n", chip->chipname, chip->revision);
1026}
1027
1028static DEVICE_ATTR(chip_id, S_IRUGO, apds990x_chip_id_show, NULL);
1029
1030static struct attribute *sysfs_attrs_ctrl[] = {
1031        &dev_attr_lux0_calibscale.attr,
1032        &dev_attr_lux0_calibscale_default.attr,
1033        &dev_attr_lux0_input.attr,
1034        &dev_attr_lux0_sensor_range.attr,
1035        &dev_attr_lux0_rate.attr,
1036        &dev_attr_lux0_rate_avail.attr,
1037        &dev_attr_lux0_thresh_above_value.attr,
1038        &dev_attr_lux0_thresh_below_value.attr,
1039        &dev_attr_prox0_raw_en.attr,
1040        &dev_attr_prox0_raw.attr,
1041        &dev_attr_prox0_sensor_range.attr,
1042        &dev_attr_prox0_thresh_above_value.attr,
1043        &dev_attr_prox0_reporting_mode.attr,
1044        &dev_attr_prox0_reporting_mode_avail.attr,
1045        &dev_attr_chip_id.attr,
1046        &dev_attr_power_state.attr,
1047        NULL
1048};
1049
1050static const struct attribute_group apds990x_attribute_group[] = {
1051        {.attrs = sysfs_attrs_ctrl },
1052};
1053
1054static int apds990x_probe(struct i2c_client *client,
1055                                const struct i2c_device_id *id)
1056{
1057        struct apds990x_chip *chip;
1058        int err;
1059
1060        chip = kzalloc(sizeof *chip, GFP_KERNEL);
1061        if (!chip)
1062                return -ENOMEM;
1063
1064        i2c_set_clientdata(client, chip);
1065        chip->client  = client;
1066
1067        init_waitqueue_head(&chip->wait);
1068        mutex_init(&chip->mutex);
1069        chip->pdata     = client->dev.platform_data;
1070
1071        if (chip->pdata == NULL) {
1072                dev_err(&client->dev, "platform data is mandatory\n");
1073                err = -EINVAL;
1074                goto fail1;
1075        }
1076
1077        if (chip->pdata->cf.ga == 0) {
1078                /* set uncovered sensor default parameters */
1079                chip->cf.ga = 1966; /* 0.48 * APDS_PARAM_SCALE */
1080                chip->cf.cf1 = 4096; /* 1.00 * APDS_PARAM_SCALE */
1081                chip->cf.irf1 = 9134; /* 2.23 * APDS_PARAM_SCALE */
1082                chip->cf.cf2 = 2867; /* 0.70 * APDS_PARAM_SCALE */
1083                chip->cf.irf2 = 5816; /* 1.42 * APDS_PARAM_SCALE */
1084                chip->cf.df = 52;
1085        } else {
1086                chip->cf = chip->pdata->cf;
1087        }
1088
1089        /* precalculate inverse chip factors for threshold control */
1090        chip->rcf.afactor =
1091                (chip->cf.irf1 - chip->cf.irf2) * APDS_PARAM_SCALE /
1092                (chip->cf.cf1 - chip->cf.cf2);
1093        chip->rcf.cf1 = APDS_PARAM_SCALE * APDS_PARAM_SCALE /
1094                chip->cf.cf1;
1095        chip->rcf.irf1 = chip->cf.irf1 * APDS_PARAM_SCALE /
1096                chip->cf.cf1;
1097        chip->rcf.cf2 = APDS_PARAM_SCALE * APDS_PARAM_SCALE /
1098                chip->cf.cf2;
1099        chip->rcf.irf2 = chip->cf.irf2 * APDS_PARAM_SCALE /
1100                chip->cf.cf2;
1101
1102        /* Set something to start with */
1103        chip->lux_thres_hi = APDS_LUX_DEF_THRES_HI;
1104        chip->lux_thres_lo = APDS_LUX_DEF_THRES_LO;
1105        chip->lux_calib = APDS_LUX_NEUTRAL_CALIB_VALUE;
1106
1107        chip->prox_thres = APDS_PROX_DEF_THRES;
1108        chip->pdrive = chip->pdata->pdrive;
1109        chip->pdiode = APDS_PDIODE_IR;
1110        chip->pgain = APDS_PGAIN_1X;
1111        chip->prox_calib = APDS_PROX_NEUTRAL_CALIB_VALUE;
1112        chip->prox_persistence = APDS_DEFAULT_PROX_PERS;
1113        chip->prox_continuous_mode = false;
1114
1115        chip->regs[0].supply = reg_vcc;
1116        chip->regs[1].supply = reg_vled;
1117
1118        err = regulator_bulk_get(&client->dev,
1119                                 ARRAY_SIZE(chip->regs), chip->regs);
1120        if (err < 0) {
1121                dev_err(&client->dev, "Cannot get regulators\n");
1122                goto fail1;
1123        }
1124
1125        err = regulator_bulk_enable(ARRAY_SIZE(chip->regs), chip->regs);
1126        if (err < 0) {
1127                dev_err(&client->dev, "Cannot enable regulators\n");
1128                goto fail2;
1129        }
1130
1131        usleep_range(APDS_STARTUP_DELAY, 2 * APDS_STARTUP_DELAY);
1132
1133        err = apds990x_detect(chip);
1134        if (err < 0) {
1135                dev_err(&client->dev, "APDS990X not found\n");
1136                goto fail3;
1137        }
1138
1139        pm_runtime_set_active(&client->dev);
1140
1141        apds990x_configure(chip);
1142        apds990x_set_arate(chip, APDS_LUX_DEFAULT_RATE);
1143        apds990x_mode_on(chip);
1144
1145        pm_runtime_enable(&client->dev);
1146
1147        if (chip->pdata->setup_resources) {
1148                err = chip->pdata->setup_resources();
1149                if (err) {
1150                        err = -EINVAL;
1151                        goto fail3;
1152                }
1153        }
1154
1155        err = sysfs_create_group(&chip->client->dev.kobj,
1156                                apds990x_attribute_group);
1157        if (err < 0) {
1158                dev_err(&chip->client->dev, "Sysfs registration failed\n");
1159                goto fail4;
1160        }
1161
1162        err = request_threaded_irq(client->irq, NULL,
1163                                apds990x_irq,
1164                                IRQF_TRIGGER_FALLING | IRQF_TRIGGER_LOW |
1165                                IRQF_ONESHOT,
1166                                "apds990x", chip);
1167        if (err) {
1168                dev_err(&client->dev, "could not get IRQ %d\n",
1169                        client->irq);
1170                goto fail5;
1171        }
1172        return err;
1173fail5:
1174        sysfs_remove_group(&chip->client->dev.kobj,
1175                        &apds990x_attribute_group[0]);
1176fail4:
1177        if (chip->pdata && chip->pdata->release_resources)
1178                chip->pdata->release_resources();
1179fail3:
1180        regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs);
1181fail2:
1182        regulator_bulk_free(ARRAY_SIZE(chip->regs), chip->regs);
1183fail1:
1184        kfree(chip);
1185        return err;
1186}
1187
1188static int apds990x_remove(struct i2c_client *client)
1189{
1190        struct apds990x_chip *chip = i2c_get_clientdata(client);
1191
1192        free_irq(client->irq, chip);
1193        sysfs_remove_group(&chip->client->dev.kobj,
1194                        apds990x_attribute_group);
1195
1196        if (chip->pdata && chip->pdata->release_resources)
1197                chip->pdata->release_resources();
1198
1199        if (!pm_runtime_suspended(&client->dev))
1200                apds990x_chip_off(chip);
1201
1202        pm_runtime_disable(&client->dev);
1203        pm_runtime_set_suspended(&client->dev);
1204
1205        regulator_bulk_free(ARRAY_SIZE(chip->regs), chip->regs);
1206
1207        kfree(chip);
1208        return 0;
1209}
1210
1211#ifdef CONFIG_PM_SLEEP
1212static int apds990x_suspend(struct device *dev)
1213{
1214        struct i2c_client *client = to_i2c_client(dev);
1215        struct apds990x_chip *chip = i2c_get_clientdata(client);
1216
1217        apds990x_chip_off(chip);
1218        return 0;
1219}
1220
1221static int apds990x_resume(struct device *dev)
1222{
1223        struct i2c_client *client = to_i2c_client(dev);
1224        struct apds990x_chip *chip = i2c_get_clientdata(client);
1225
1226        /*
1227         * If we were enabled at suspend time, it is expected
1228         * everything works nice and smoothly. Chip_on is enough
1229         */
1230        apds990x_chip_on(chip);
1231
1232        return 0;
1233}
1234#endif
1235
1236#ifdef CONFIG_PM
1237static int apds990x_runtime_suspend(struct device *dev)
1238{
1239        struct i2c_client *client = to_i2c_client(dev);
1240        struct apds990x_chip *chip = i2c_get_clientdata(client);
1241
1242        apds990x_chip_off(chip);
1243        return 0;
1244}
1245
1246static int apds990x_runtime_resume(struct device *dev)
1247{
1248        struct i2c_client *client = to_i2c_client(dev);
1249        struct apds990x_chip *chip = i2c_get_clientdata(client);
1250
1251        apds990x_chip_on(chip);
1252        return 0;
1253}
1254
1255#endif
1256
1257static const struct i2c_device_id apds990x_id[] = {
1258        {"apds990x", 0 },
1259        {}
1260};
1261
1262MODULE_DEVICE_TABLE(i2c, apds990x_id);
1263
1264static const struct dev_pm_ops apds990x_pm_ops = {
1265        SET_SYSTEM_SLEEP_PM_OPS(apds990x_suspend, apds990x_resume)
1266        SET_RUNTIME_PM_OPS(apds990x_runtime_suspend,
1267                        apds990x_runtime_resume,
1268                        NULL)
1269};
1270
1271static struct i2c_driver apds990x_driver = {
1272        .driver  = {
1273                .name   = "apds990x",
1274                .pm     = &apds990x_pm_ops,
1275        },
1276        .probe    = apds990x_probe,
1277        .remove   = apds990x_remove,
1278        .id_table = apds990x_id,
1279};
1280
1281module_i2c_driver(apds990x_driver);
1282
1283MODULE_DESCRIPTION("APDS990X combined ALS and proximity sensor");
1284MODULE_AUTHOR("Samu Onkalo, Nokia Corporation");
1285MODULE_LICENSE("GPL v2");
1286
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