linux/drivers/iio/light/gp2ap020a00f.c
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   1/*
   2 * Copyright (C) 2013 Samsung Electronics Co., Ltd.
   3 * Author: Jacek Anaszewski <j.anaszewski@samsung.com>
   4 *
   5 * IIO features supported by the driver:
   6 *
   7 * Read-only raw channels:
   8 *   - illuminance_clear [lux]
   9 *   - illuminance_ir
  10 *   - proximity
  11 *
  12 * Triggered buffer:
  13 *   - illuminance_clear
  14 *   - illuminance_ir
  15 *   - proximity
  16 *
  17 * Events:
  18 *   - illuminance_clear (rising and falling)
  19 *   - proximity (rising and falling)
  20 *     - both falling and rising thresholds for the proximity events
  21 *       must be set to the values greater than 0.
  22 *
  23 * The driver supports triggered buffers for all the three
  24 * channels as well as high and low threshold events for the
  25 * illuminance_clear and proxmimity channels. Triggers
  26 * can be enabled simultaneously with both illuminance_clear
  27 * events. Proximity events cannot be enabled simultaneously
  28 * with any triggers or illuminance events. Enabling/disabling
  29 * one of the proximity events automatically enables/disables
  30 * the other one.
  31 *
  32 * This program is free software; you can redistribute it and/or modify
  33 * it under the terms of the GNU General Public License version 2, as
  34 * published by the Free Software Foundation.
  35 */
  36
  37#include <linux/debugfs.h>
  38#include <linux/delay.h>
  39#include <linux/i2c.h>
  40#include <linux/interrupt.h>
  41#include <linux/irq.h>
  42#include <linux/irq_work.h>
  43#include <linux/module.h>
  44#include <linux/mutex.h>
  45#include <linux/of.h>
  46#include <linux/regmap.h>
  47#include <linux/regulator/consumer.h>
  48#include <linux/slab.h>
  49#include <asm/unaligned.h>
  50#include <linux/iio/buffer.h>
  51#include <linux/iio/events.h>
  52#include <linux/iio/iio.h>
  53#include <linux/iio/sysfs.h>
  54#include <linux/iio/trigger.h>
  55#include <linux/iio/trigger_consumer.h>
  56#include <linux/iio/triggered_buffer.h>
  57
  58#define GP2A_I2C_NAME "gp2ap020a00f"
  59
  60/* Registers */
  61#define GP2AP020A00F_OP_REG     0x00 /* Basic operations */
  62#define GP2AP020A00F_ALS_REG    0x01 /* ALS related settings */
  63#define GP2AP020A00F_PS_REG     0x02 /* PS related settings */
  64#define GP2AP020A00F_LED_REG    0x03 /* LED reg */
  65#define GP2AP020A00F_TL_L_REG   0x04 /* ALS: Threshold low LSB */
  66#define GP2AP020A00F_TL_H_REG   0x05 /* ALS: Threshold low MSB */
  67#define GP2AP020A00F_TH_L_REG   0x06 /* ALS: Threshold high LSB */
  68#define GP2AP020A00F_TH_H_REG   0x07 /* ALS: Threshold high MSB */
  69#define GP2AP020A00F_PL_L_REG   0x08 /* PS: Threshold low LSB */
  70#define GP2AP020A00F_PL_H_REG   0x09 /* PS: Threshold low MSB */
  71#define GP2AP020A00F_PH_L_REG   0x0a /* PS: Threshold high LSB */
  72#define GP2AP020A00F_PH_H_REG   0x0b /* PS: Threshold high MSB */
  73#define GP2AP020A00F_D0_L_REG   0x0c /* ALS result: Clear/Illuminance LSB */
  74#define GP2AP020A00F_D0_H_REG   0x0d /* ALS result: Clear/Illuminance MSB */
  75#define GP2AP020A00F_D1_L_REG   0x0e /* ALS result: IR LSB */
  76#define GP2AP020A00F_D1_H_REG   0x0f /* ALS result: IR LSB */
  77#define GP2AP020A00F_D2_L_REG   0x10 /* PS result LSB */
  78#define GP2AP020A00F_D2_H_REG   0x11 /* PS result MSB */
  79#define GP2AP020A00F_NUM_REGS   0x12 /* Number of registers */
  80
  81/* OP_REG bits */
  82#define GP2AP020A00F_OP3_MASK           0x80 /* Software shutdown */
  83#define GP2AP020A00F_OP3_SHUTDOWN       0x00
  84#define GP2AP020A00F_OP3_OPERATION      0x80
  85#define GP2AP020A00F_OP2_MASK           0x40 /* Auto shutdown/Continuous mode */
  86#define GP2AP020A00F_OP2_AUTO_SHUTDOWN  0x00
  87#define GP2AP020A00F_OP2_CONT_OPERATION 0x40
  88#define GP2AP020A00F_OP_MASK            0x30 /* Operating mode selection  */
  89#define GP2AP020A00F_OP_ALS_AND_PS      0x00
  90#define GP2AP020A00F_OP_ALS             0x10
  91#define GP2AP020A00F_OP_PS              0x20
  92#define GP2AP020A00F_OP_DEBUG           0x30
  93#define GP2AP020A00F_PROX_MASK          0x08 /* PS: detection/non-detection */
  94#define GP2AP020A00F_PROX_NON_DETECT    0x00
  95#define GP2AP020A00F_PROX_DETECT        0x08
  96#define GP2AP020A00F_FLAG_P             0x04 /* PS: interrupt result  */
  97#define GP2AP020A00F_FLAG_A             0x02 /* ALS: interrupt result  */
  98#define GP2AP020A00F_TYPE_MASK          0x01 /* Output data type selection */
  99#define GP2AP020A00F_TYPE_MANUAL_CALC   0x00
 100#define GP2AP020A00F_TYPE_AUTO_CALC     0x01
 101
 102/* ALS_REG bits */
 103#define GP2AP020A00F_PRST_MASK          0xc0 /* Number of measurement cycles */
 104#define GP2AP020A00F_PRST_ONCE          0x00
 105#define GP2AP020A00F_PRST_4_CYCLES      0x40
 106#define GP2AP020A00F_PRST_8_CYCLES      0x80
 107#define GP2AP020A00F_PRST_16_CYCLES     0xc0
 108#define GP2AP020A00F_RES_A_MASK         0x38 /* ALS: Resolution */
 109#define GP2AP020A00F_RES_A_800ms        0x00
 110#define GP2AP020A00F_RES_A_400ms        0x08
 111#define GP2AP020A00F_RES_A_200ms        0x10
 112#define GP2AP020A00F_RES_A_100ms        0x18
 113#define GP2AP020A00F_RES_A_25ms         0x20
 114#define GP2AP020A00F_RES_A_6_25ms       0x28
 115#define GP2AP020A00F_RES_A_1_56ms       0x30
 116#define GP2AP020A00F_RES_A_0_39ms       0x38
 117#define GP2AP020A00F_RANGE_A_MASK       0x07 /* ALS: Max measurable range */
 118#define GP2AP020A00F_RANGE_A_x1         0x00
 119#define GP2AP020A00F_RANGE_A_x2         0x01
 120#define GP2AP020A00F_RANGE_A_x4         0x02
 121#define GP2AP020A00F_RANGE_A_x8         0x03
 122#define GP2AP020A00F_RANGE_A_x16        0x04
 123#define GP2AP020A00F_RANGE_A_x32        0x05
 124#define GP2AP020A00F_RANGE_A_x64        0x06
 125#define GP2AP020A00F_RANGE_A_x128       0x07
 126
 127/* PS_REG bits */
 128#define GP2AP020A00F_ALC_MASK           0x80 /* Auto light cancel */
 129#define GP2AP020A00F_ALC_ON             0x80
 130#define GP2AP020A00F_ALC_OFF            0x00
 131#define GP2AP020A00F_INTTYPE_MASK       0x40 /* Interrupt type setting */
 132#define GP2AP020A00F_INTTYPE_LEVEL      0x00
 133#define GP2AP020A00F_INTTYPE_PULSE      0x40
 134#define GP2AP020A00F_RES_P_MASK         0x38 /* PS: Resolution */
 135#define GP2AP020A00F_RES_P_800ms_x2     0x00
 136#define GP2AP020A00F_RES_P_400ms_x2     0x08
 137#define GP2AP020A00F_RES_P_200ms_x2     0x10
 138#define GP2AP020A00F_RES_P_100ms_x2     0x18
 139#define GP2AP020A00F_RES_P_25ms_x2      0x20
 140#define GP2AP020A00F_RES_P_6_25ms_x2    0x28
 141#define GP2AP020A00F_RES_P_1_56ms_x2    0x30
 142#define GP2AP020A00F_RES_P_0_39ms_x2    0x38
 143#define GP2AP020A00F_RANGE_P_MASK       0x07 /* PS: Max measurable range */
 144#define GP2AP020A00F_RANGE_P_x1         0x00
 145#define GP2AP020A00F_RANGE_P_x2         0x01
 146#define GP2AP020A00F_RANGE_P_x4         0x02
 147#define GP2AP020A00F_RANGE_P_x8         0x03
 148#define GP2AP020A00F_RANGE_P_x16        0x04
 149#define GP2AP020A00F_RANGE_P_x32        0x05
 150#define GP2AP020A00F_RANGE_P_x64        0x06
 151#define GP2AP020A00F_RANGE_P_x128       0x07
 152
 153/* LED reg bits */
 154#define GP2AP020A00F_INTVAL_MASK        0xc0 /* Intermittent operating */
 155#define GP2AP020A00F_INTVAL_0           0x00
 156#define GP2AP020A00F_INTVAL_4           0x40
 157#define GP2AP020A00F_INTVAL_8           0x80
 158#define GP2AP020A00F_INTVAL_16          0xc0
 159#define GP2AP020A00F_IS_MASK            0x30 /* ILED drive peak current */
 160#define GP2AP020A00F_IS_13_8mA          0x00
 161#define GP2AP020A00F_IS_27_5mA          0x10
 162#define GP2AP020A00F_IS_55mA            0x20
 163#define GP2AP020A00F_IS_110mA           0x30
 164#define GP2AP020A00F_PIN_MASK           0x0c /* INT terminal setting */
 165#define GP2AP020A00F_PIN_ALS_OR_PS      0x00
 166#define GP2AP020A00F_PIN_ALS            0x04
 167#define GP2AP020A00F_PIN_PS             0x08
 168#define GP2AP020A00F_PIN_PS_DETECT      0x0c
 169#define GP2AP020A00F_FREQ_MASK          0x02 /* LED modulation frequency */
 170#define GP2AP020A00F_FREQ_327_5kHz      0x00
 171#define GP2AP020A00F_FREQ_81_8kHz       0x02
 172#define GP2AP020A00F_RST                0x01 /* Software reset */
 173
 174#define GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR      0
 175#define GP2AP020A00F_SCAN_MODE_LIGHT_IR         1
 176#define GP2AP020A00F_SCAN_MODE_PROXIMITY        2
 177#define GP2AP020A00F_CHAN_TIMESTAMP             3
 178
 179#define GP2AP020A00F_DATA_READY_TIMEOUT         msecs_to_jiffies(1000)
 180#define GP2AP020A00F_DATA_REG(chan)             (GP2AP020A00F_D0_L_REG + \
 181                                                        (chan) * 2)
 182#define GP2AP020A00F_THRESH_REG(th_val_id)      (GP2AP020A00F_TL_L_REG + \
 183                                                        (th_val_id) * 2)
 184#define GP2AP020A00F_THRESH_VAL_ID(reg_addr)    ((reg_addr - 4) / 2)
 185
 186#define GP2AP020A00F_SUBTRACT_MODE      0
 187#define GP2AP020A00F_ADD_MODE           1
 188
 189#define GP2AP020A00F_MAX_CHANNELS       3
 190
 191enum gp2ap020a00f_opmode {
 192        GP2AP020A00F_OPMODE_READ_RAW_CLEAR,
 193        GP2AP020A00F_OPMODE_READ_RAW_IR,
 194        GP2AP020A00F_OPMODE_READ_RAW_PROXIMITY,
 195        GP2AP020A00F_OPMODE_ALS,
 196        GP2AP020A00F_OPMODE_PS,
 197        GP2AP020A00F_OPMODE_ALS_AND_PS,
 198        GP2AP020A00F_OPMODE_PROX_DETECT,
 199        GP2AP020A00F_OPMODE_SHUTDOWN,
 200        GP2AP020A00F_NUM_OPMODES,
 201};
 202
 203enum gp2ap020a00f_cmd {
 204        GP2AP020A00F_CMD_READ_RAW_CLEAR,
 205        GP2AP020A00F_CMD_READ_RAW_IR,
 206        GP2AP020A00F_CMD_READ_RAW_PROXIMITY,
 207        GP2AP020A00F_CMD_TRIGGER_CLEAR_EN,
 208        GP2AP020A00F_CMD_TRIGGER_CLEAR_DIS,
 209        GP2AP020A00F_CMD_TRIGGER_IR_EN,
 210        GP2AP020A00F_CMD_TRIGGER_IR_DIS,
 211        GP2AP020A00F_CMD_TRIGGER_PROX_EN,
 212        GP2AP020A00F_CMD_TRIGGER_PROX_DIS,
 213        GP2AP020A00F_CMD_ALS_HIGH_EV_EN,
 214        GP2AP020A00F_CMD_ALS_HIGH_EV_DIS,
 215        GP2AP020A00F_CMD_ALS_LOW_EV_EN,
 216        GP2AP020A00F_CMD_ALS_LOW_EV_DIS,
 217        GP2AP020A00F_CMD_PROX_HIGH_EV_EN,
 218        GP2AP020A00F_CMD_PROX_HIGH_EV_DIS,
 219        GP2AP020A00F_CMD_PROX_LOW_EV_EN,
 220        GP2AP020A00F_CMD_PROX_LOW_EV_DIS,
 221};
 222
 223enum gp2ap020a00f_flags {
 224        GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER,
 225        GP2AP020A00F_FLAG_ALS_IR_TRIGGER,
 226        GP2AP020A00F_FLAG_PROX_TRIGGER,
 227        GP2AP020A00F_FLAG_PROX_RISING_EV,
 228        GP2AP020A00F_FLAG_PROX_FALLING_EV,
 229        GP2AP020A00F_FLAG_ALS_RISING_EV,
 230        GP2AP020A00F_FLAG_ALS_FALLING_EV,
 231        GP2AP020A00F_FLAG_LUX_MODE_HI,
 232        GP2AP020A00F_FLAG_DATA_READY,
 233};
 234
 235enum gp2ap020a00f_thresh_val_id {
 236        GP2AP020A00F_THRESH_TL,
 237        GP2AP020A00F_THRESH_TH,
 238        GP2AP020A00F_THRESH_PL,
 239        GP2AP020A00F_THRESH_PH,
 240};
 241
 242struct gp2ap020a00f_data {
 243        const struct gp2ap020a00f_platform_data *pdata;
 244        struct i2c_client *client;
 245        struct mutex lock;
 246        char *buffer;
 247        struct regulator *vled_reg;
 248        unsigned long flags;
 249        enum gp2ap020a00f_opmode cur_opmode;
 250        struct iio_trigger *trig;
 251        struct regmap *regmap;
 252        unsigned int thresh_val[4];
 253        u8 debug_reg_addr;
 254        struct irq_work work;
 255        wait_queue_head_t data_ready_queue;
 256};
 257
 258static const u8 gp2ap020a00f_reg_init_tab[] = {
 259        [GP2AP020A00F_OP_REG] = GP2AP020A00F_OP3_SHUTDOWN,
 260        [GP2AP020A00F_ALS_REG] = GP2AP020A00F_RES_A_25ms |
 261                                 GP2AP020A00F_RANGE_A_x8,
 262        [GP2AP020A00F_PS_REG] = GP2AP020A00F_ALC_ON |
 263                                GP2AP020A00F_RES_P_1_56ms_x2 |
 264                                GP2AP020A00F_RANGE_P_x4,
 265        [GP2AP020A00F_LED_REG] = GP2AP020A00F_INTVAL_0 |
 266                                 GP2AP020A00F_IS_110mA |
 267                                 GP2AP020A00F_FREQ_327_5kHz,
 268        [GP2AP020A00F_TL_L_REG] = 0,
 269        [GP2AP020A00F_TL_H_REG] = 0,
 270        [GP2AP020A00F_TH_L_REG] = 0,
 271        [GP2AP020A00F_TH_H_REG] = 0,
 272        [GP2AP020A00F_PL_L_REG] = 0,
 273        [GP2AP020A00F_PL_H_REG] = 0,
 274        [GP2AP020A00F_PH_L_REG] = 0,
 275        [GP2AP020A00F_PH_H_REG] = 0,
 276};
 277
 278static bool gp2ap020a00f_is_volatile_reg(struct device *dev, unsigned int reg)
 279{
 280        switch (reg) {
 281        case GP2AP020A00F_OP_REG:
 282        case GP2AP020A00F_D0_L_REG:
 283        case GP2AP020A00F_D0_H_REG:
 284        case GP2AP020A00F_D1_L_REG:
 285        case GP2AP020A00F_D1_H_REG:
 286        case GP2AP020A00F_D2_L_REG:
 287        case GP2AP020A00F_D2_H_REG:
 288                return true;
 289        default:
 290                return false;
 291        }
 292}
 293
 294static const struct regmap_config gp2ap020a00f_regmap_config = {
 295        .reg_bits = 8,
 296        .val_bits = 8,
 297
 298        .max_register = GP2AP020A00F_D2_H_REG,
 299        .cache_type = REGCACHE_RBTREE,
 300
 301        .volatile_reg = gp2ap020a00f_is_volatile_reg,
 302};
 303
 304static const struct gp2ap020a00f_mutable_config_regs {
 305        u8 op_reg;
 306        u8 als_reg;
 307        u8 ps_reg;
 308        u8 led_reg;
 309} opmode_regs_settings[GP2AP020A00F_NUM_OPMODES] = {
 310        [GP2AP020A00F_OPMODE_READ_RAW_CLEAR] = {
 311                GP2AP020A00F_OP_ALS | GP2AP020A00F_OP2_CONT_OPERATION
 312                | GP2AP020A00F_OP3_OPERATION
 313                | GP2AP020A00F_TYPE_AUTO_CALC,
 314                GP2AP020A00F_PRST_ONCE,
 315                GP2AP020A00F_INTTYPE_LEVEL,
 316                GP2AP020A00F_PIN_ALS
 317        },
 318        [GP2AP020A00F_OPMODE_READ_RAW_IR] = {
 319                GP2AP020A00F_OP_ALS | GP2AP020A00F_OP2_CONT_OPERATION
 320                | GP2AP020A00F_OP3_OPERATION
 321                | GP2AP020A00F_TYPE_MANUAL_CALC,
 322                GP2AP020A00F_PRST_ONCE,
 323                GP2AP020A00F_INTTYPE_LEVEL,
 324                GP2AP020A00F_PIN_ALS
 325        },
 326        [GP2AP020A00F_OPMODE_READ_RAW_PROXIMITY] = {
 327                GP2AP020A00F_OP_PS | GP2AP020A00F_OP2_CONT_OPERATION
 328                | GP2AP020A00F_OP3_OPERATION
 329                | GP2AP020A00F_TYPE_MANUAL_CALC,
 330                GP2AP020A00F_PRST_ONCE,
 331                GP2AP020A00F_INTTYPE_LEVEL,
 332                GP2AP020A00F_PIN_PS
 333        },
 334        [GP2AP020A00F_OPMODE_PROX_DETECT] = {
 335                GP2AP020A00F_OP_PS | GP2AP020A00F_OP2_CONT_OPERATION
 336                | GP2AP020A00F_OP3_OPERATION
 337                | GP2AP020A00F_TYPE_MANUAL_CALC,
 338                GP2AP020A00F_PRST_4_CYCLES,
 339                GP2AP020A00F_INTTYPE_PULSE,
 340                GP2AP020A00F_PIN_PS_DETECT
 341        },
 342        [GP2AP020A00F_OPMODE_ALS] = {
 343                GP2AP020A00F_OP_ALS | GP2AP020A00F_OP2_CONT_OPERATION
 344                | GP2AP020A00F_OP3_OPERATION
 345                | GP2AP020A00F_TYPE_AUTO_CALC,
 346                GP2AP020A00F_PRST_ONCE,
 347                GP2AP020A00F_INTTYPE_LEVEL,
 348                GP2AP020A00F_PIN_ALS
 349        },
 350        [GP2AP020A00F_OPMODE_PS] = {
 351                GP2AP020A00F_OP_PS | GP2AP020A00F_OP2_CONT_OPERATION
 352                | GP2AP020A00F_OP3_OPERATION
 353                | GP2AP020A00F_TYPE_MANUAL_CALC,
 354                GP2AP020A00F_PRST_4_CYCLES,
 355                GP2AP020A00F_INTTYPE_LEVEL,
 356                GP2AP020A00F_PIN_PS
 357        },
 358        [GP2AP020A00F_OPMODE_ALS_AND_PS] = {
 359                GP2AP020A00F_OP_ALS_AND_PS
 360                | GP2AP020A00F_OP2_CONT_OPERATION
 361                | GP2AP020A00F_OP3_OPERATION
 362                | GP2AP020A00F_TYPE_AUTO_CALC,
 363                GP2AP020A00F_PRST_4_CYCLES,
 364                GP2AP020A00F_INTTYPE_LEVEL,
 365                GP2AP020A00F_PIN_ALS_OR_PS
 366        },
 367        [GP2AP020A00F_OPMODE_SHUTDOWN] = { GP2AP020A00F_OP3_SHUTDOWN, },
 368};
 369
 370static int gp2ap020a00f_set_operation_mode(struct gp2ap020a00f_data *data,
 371                                        enum gp2ap020a00f_opmode op)
 372{
 373        unsigned int op_reg_val;
 374        int err;
 375
 376        if (op != GP2AP020A00F_OPMODE_SHUTDOWN) {
 377                err = regmap_read(data->regmap, GP2AP020A00F_OP_REG,
 378                                        &op_reg_val);
 379                if (err < 0)
 380                        return err;
 381                /*
 382                 * Shutdown the device if the operation being executed entails
 383                 * mode transition.
 384                 */
 385                if ((opmode_regs_settings[op].op_reg & GP2AP020A00F_OP_MASK) !=
 386                    (op_reg_val & GP2AP020A00F_OP_MASK)) {
 387                        /* set shutdown mode */
 388                        err = regmap_update_bits(data->regmap,
 389                                GP2AP020A00F_OP_REG, GP2AP020A00F_OP3_MASK,
 390                                GP2AP020A00F_OP3_SHUTDOWN);
 391                        if (err < 0)
 392                                return err;
 393                }
 394
 395                err = regmap_update_bits(data->regmap, GP2AP020A00F_ALS_REG,
 396                        GP2AP020A00F_PRST_MASK, opmode_regs_settings[op]
 397                                                                .als_reg);
 398                if (err < 0)
 399                        return err;
 400
 401                err = regmap_update_bits(data->regmap, GP2AP020A00F_PS_REG,
 402                        GP2AP020A00F_INTTYPE_MASK, opmode_regs_settings[op]
 403                                                                .ps_reg);
 404                if (err < 0)
 405                        return err;
 406
 407                err = regmap_update_bits(data->regmap, GP2AP020A00F_LED_REG,
 408                        GP2AP020A00F_PIN_MASK, opmode_regs_settings[op]
 409                                                                .led_reg);
 410                if (err < 0)
 411                        return err;
 412        }
 413
 414        /* Set OP_REG and apply operation mode (power on / off) */
 415        err = regmap_update_bits(data->regmap,
 416                                 GP2AP020A00F_OP_REG,
 417                                 GP2AP020A00F_OP_MASK | GP2AP020A00F_OP2_MASK |
 418                                 GP2AP020A00F_OP3_MASK | GP2AP020A00F_TYPE_MASK,
 419                                 opmode_regs_settings[op].op_reg);
 420        if (err < 0)
 421                return err;
 422
 423        data->cur_opmode = op;
 424
 425        return 0;
 426}
 427
 428static bool gp2ap020a00f_als_enabled(struct gp2ap020a00f_data *data)
 429{
 430        return test_bit(GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER, &data->flags) ||
 431               test_bit(GP2AP020A00F_FLAG_ALS_IR_TRIGGER, &data->flags) ||
 432               test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags) ||
 433               test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags);
 434}
 435
 436static bool gp2ap020a00f_prox_detect_enabled(struct gp2ap020a00f_data *data)
 437{
 438        return test_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, &data->flags) ||
 439               test_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, &data->flags);
 440}
 441
 442static int gp2ap020a00f_write_event_threshold(struct gp2ap020a00f_data *data,
 443                                enum gp2ap020a00f_thresh_val_id th_val_id,
 444                                bool enable)
 445{
 446        __le16 thresh_buf = 0;
 447        unsigned int thresh_reg_val;
 448
 449        if (!enable)
 450                thresh_reg_val = 0;
 451        else if (test_bit(GP2AP020A00F_FLAG_LUX_MODE_HI, &data->flags) &&
 452                 th_val_id != GP2AP020A00F_THRESH_PL &&
 453                 th_val_id != GP2AP020A00F_THRESH_PH)
 454                /*
 455                 * For the high lux mode ALS threshold has to be scaled down
 456                 * to allow for proper comparison with the output value.
 457                 */
 458                thresh_reg_val = data->thresh_val[th_val_id] / 16;
 459        else
 460                thresh_reg_val = data->thresh_val[th_val_id] > 16000 ?
 461                                        16000 :
 462                                        data->thresh_val[th_val_id];
 463
 464        thresh_buf = cpu_to_le16(thresh_reg_val);
 465
 466        return regmap_bulk_write(data->regmap,
 467                                 GP2AP020A00F_THRESH_REG(th_val_id),
 468                                 (u8 *)&thresh_buf, 2);
 469}
 470
 471static int gp2ap020a00f_alter_opmode(struct gp2ap020a00f_data *data,
 472                        enum gp2ap020a00f_opmode diff_mode, int add_sub)
 473{
 474        enum gp2ap020a00f_opmode new_mode;
 475
 476        if (diff_mode != GP2AP020A00F_OPMODE_ALS &&
 477            diff_mode != GP2AP020A00F_OPMODE_PS)
 478                return -EINVAL;
 479
 480        if (add_sub == GP2AP020A00F_ADD_MODE) {
 481                if (data->cur_opmode == GP2AP020A00F_OPMODE_SHUTDOWN)
 482                        new_mode =  diff_mode;
 483                else
 484                        new_mode = GP2AP020A00F_OPMODE_ALS_AND_PS;
 485        } else {
 486                if (data->cur_opmode == GP2AP020A00F_OPMODE_ALS_AND_PS)
 487                        new_mode = (diff_mode == GP2AP020A00F_OPMODE_ALS) ?
 488                                        GP2AP020A00F_OPMODE_PS :
 489                                        GP2AP020A00F_OPMODE_ALS;
 490                else
 491                        new_mode = GP2AP020A00F_OPMODE_SHUTDOWN;
 492        }
 493
 494        return gp2ap020a00f_set_operation_mode(data, new_mode);
 495}
 496
 497static int gp2ap020a00f_exec_cmd(struct gp2ap020a00f_data *data,
 498                                        enum gp2ap020a00f_cmd cmd)
 499{
 500        int err = 0;
 501
 502        switch (cmd) {
 503        case GP2AP020A00F_CMD_READ_RAW_CLEAR:
 504                if (data->cur_opmode != GP2AP020A00F_OPMODE_SHUTDOWN)
 505                        return -EBUSY;
 506                err = gp2ap020a00f_set_operation_mode(data,
 507                                        GP2AP020A00F_OPMODE_READ_RAW_CLEAR);
 508                break;
 509        case GP2AP020A00F_CMD_READ_RAW_IR:
 510                if (data->cur_opmode != GP2AP020A00F_OPMODE_SHUTDOWN)
 511                        return -EBUSY;
 512                err = gp2ap020a00f_set_operation_mode(data,
 513                                        GP2AP020A00F_OPMODE_READ_RAW_IR);
 514                break;
 515        case GP2AP020A00F_CMD_READ_RAW_PROXIMITY:
 516                if (data->cur_opmode != GP2AP020A00F_OPMODE_SHUTDOWN)
 517                        return -EBUSY;
 518                err = gp2ap020a00f_set_operation_mode(data,
 519                                        GP2AP020A00F_OPMODE_READ_RAW_PROXIMITY);
 520                break;
 521        case GP2AP020A00F_CMD_TRIGGER_CLEAR_EN:
 522                if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT)
 523                        return -EBUSY;
 524                if (!gp2ap020a00f_als_enabled(data))
 525                        err = gp2ap020a00f_alter_opmode(data,
 526                                                GP2AP020A00F_OPMODE_ALS,
 527                                                GP2AP020A00F_ADD_MODE);
 528                set_bit(GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER, &data->flags);
 529                break;
 530        case GP2AP020A00F_CMD_TRIGGER_CLEAR_DIS:
 531                clear_bit(GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER, &data->flags);
 532                if (gp2ap020a00f_als_enabled(data))
 533                        break;
 534                err = gp2ap020a00f_alter_opmode(data,
 535                                                GP2AP020A00F_OPMODE_ALS,
 536                                                GP2AP020A00F_SUBTRACT_MODE);
 537                break;
 538        case GP2AP020A00F_CMD_TRIGGER_IR_EN:
 539                if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT)
 540                        return -EBUSY;
 541                if (!gp2ap020a00f_als_enabled(data))
 542                        err = gp2ap020a00f_alter_opmode(data,
 543                                                GP2AP020A00F_OPMODE_ALS,
 544                                                GP2AP020A00F_ADD_MODE);
 545                set_bit(GP2AP020A00F_FLAG_ALS_IR_TRIGGER, &data->flags);
 546                break;
 547        case GP2AP020A00F_CMD_TRIGGER_IR_DIS:
 548                clear_bit(GP2AP020A00F_FLAG_ALS_IR_TRIGGER, &data->flags);
 549                if (gp2ap020a00f_als_enabled(data))
 550                        break;
 551                err = gp2ap020a00f_alter_opmode(data,
 552                                                GP2AP020A00F_OPMODE_ALS,
 553                                                GP2AP020A00F_SUBTRACT_MODE);
 554                break;
 555        case GP2AP020A00F_CMD_TRIGGER_PROX_EN:
 556                if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT)
 557                        return -EBUSY;
 558                err = gp2ap020a00f_alter_opmode(data,
 559                                                GP2AP020A00F_OPMODE_PS,
 560                                                GP2AP020A00F_ADD_MODE);
 561                set_bit(GP2AP020A00F_FLAG_PROX_TRIGGER, &data->flags);
 562                break;
 563        case GP2AP020A00F_CMD_TRIGGER_PROX_DIS:
 564                clear_bit(GP2AP020A00F_FLAG_PROX_TRIGGER, &data->flags);
 565                err = gp2ap020a00f_alter_opmode(data,
 566                                                GP2AP020A00F_OPMODE_PS,
 567                                                GP2AP020A00F_SUBTRACT_MODE);
 568                break;
 569        case GP2AP020A00F_CMD_ALS_HIGH_EV_EN:
 570                if (test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags))
 571                        return 0;
 572                if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT)
 573                        return -EBUSY;
 574                if (!gp2ap020a00f_als_enabled(data)) {
 575                        err = gp2ap020a00f_alter_opmode(data,
 576                                                GP2AP020A00F_OPMODE_ALS,
 577                                                GP2AP020A00F_ADD_MODE);
 578                        if (err < 0)
 579                                return err;
 580                }
 581                set_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags);
 582                err =  gp2ap020a00f_write_event_threshold(data,
 583                                        GP2AP020A00F_THRESH_TH, true);
 584                break;
 585        case GP2AP020A00F_CMD_ALS_HIGH_EV_DIS:
 586                if (!test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags))
 587                        return 0;
 588                clear_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags);
 589                if (!gp2ap020a00f_als_enabled(data)) {
 590                        err = gp2ap020a00f_alter_opmode(data,
 591                                                GP2AP020A00F_OPMODE_ALS,
 592                                                GP2AP020A00F_SUBTRACT_MODE);
 593                        if (err < 0)
 594                                return err;
 595                }
 596                err =  gp2ap020a00f_write_event_threshold(data,
 597                                        GP2AP020A00F_THRESH_TH, false);
 598                break;
 599        case GP2AP020A00F_CMD_ALS_LOW_EV_EN:
 600                if (test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags))
 601                        return 0;
 602                if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT)
 603                        return -EBUSY;
 604                if (!gp2ap020a00f_als_enabled(data)) {
 605                        err = gp2ap020a00f_alter_opmode(data,
 606                                                GP2AP020A00F_OPMODE_ALS,
 607                                                GP2AP020A00F_ADD_MODE);
 608                        if (err < 0)
 609                                return err;
 610                }
 611                set_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags);
 612                err =  gp2ap020a00f_write_event_threshold(data,
 613                                        GP2AP020A00F_THRESH_TL, true);
 614                break;
 615        case GP2AP020A00F_CMD_ALS_LOW_EV_DIS:
 616                if (!test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags))
 617                        return 0;
 618                clear_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags);
 619                if (!gp2ap020a00f_als_enabled(data)) {
 620                        err = gp2ap020a00f_alter_opmode(data,
 621                                                GP2AP020A00F_OPMODE_ALS,
 622                                                GP2AP020A00F_SUBTRACT_MODE);
 623                        if (err < 0)
 624                                return err;
 625                }
 626                err =  gp2ap020a00f_write_event_threshold(data,
 627                                        GP2AP020A00F_THRESH_TL, false);
 628                break;
 629        case GP2AP020A00F_CMD_PROX_HIGH_EV_EN:
 630                if (test_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, &data->flags))
 631                        return 0;
 632                if (gp2ap020a00f_als_enabled(data) ||
 633                    data->cur_opmode == GP2AP020A00F_OPMODE_PS)
 634                        return -EBUSY;
 635                if (!gp2ap020a00f_prox_detect_enabled(data)) {
 636                        err = gp2ap020a00f_set_operation_mode(data,
 637                                        GP2AP020A00F_OPMODE_PROX_DETECT);
 638                        if (err < 0)
 639                                return err;
 640                }
 641                set_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, &data->flags);
 642                err =  gp2ap020a00f_write_event_threshold(data,
 643                                        GP2AP020A00F_THRESH_PH, true);
 644                break;
 645        case GP2AP020A00F_CMD_PROX_HIGH_EV_DIS:
 646                if (!test_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, &data->flags))
 647                        return 0;
 648                clear_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, &data->flags);
 649                err = gp2ap020a00f_set_operation_mode(data,
 650                                        GP2AP020A00F_OPMODE_SHUTDOWN);
 651                if (err < 0)
 652                        return err;
 653                err =  gp2ap020a00f_write_event_threshold(data,
 654                                        GP2AP020A00F_THRESH_PH, false);
 655                break;
 656        case GP2AP020A00F_CMD_PROX_LOW_EV_EN:
 657                if (test_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, &data->flags))
 658                        return 0;
 659                if (gp2ap020a00f_als_enabled(data) ||
 660                    data->cur_opmode == GP2AP020A00F_OPMODE_PS)
 661                        return -EBUSY;
 662                if (!gp2ap020a00f_prox_detect_enabled(data)) {
 663                        err = gp2ap020a00f_set_operation_mode(data,
 664                                        GP2AP020A00F_OPMODE_PROX_DETECT);
 665                        if (err < 0)
 666                                return err;
 667                }
 668                set_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, &data->flags);
 669                err =  gp2ap020a00f_write_event_threshold(data,
 670                                        GP2AP020A00F_THRESH_PL, true);
 671                break;
 672        case GP2AP020A00F_CMD_PROX_LOW_EV_DIS:
 673                if (!test_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, &data->flags))
 674                        return 0;
 675                clear_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, &data->flags);
 676                err = gp2ap020a00f_set_operation_mode(data,
 677                                        GP2AP020A00F_OPMODE_SHUTDOWN);
 678                if (err < 0)
 679                        return err;
 680                err =  gp2ap020a00f_write_event_threshold(data,
 681                                        GP2AP020A00F_THRESH_PL, false);
 682                break;
 683        }
 684
 685        return err;
 686}
 687
 688static int wait_conversion_complete_irq(struct gp2ap020a00f_data *data)
 689{
 690        int ret;
 691
 692        ret = wait_event_timeout(data->data_ready_queue,
 693                                 test_bit(GP2AP020A00F_FLAG_DATA_READY,
 694                                          &data->flags),
 695                                 GP2AP020A00F_DATA_READY_TIMEOUT);
 696        clear_bit(GP2AP020A00F_FLAG_DATA_READY, &data->flags);
 697
 698        return ret > 0 ? 0 : -ETIME;
 699}
 700
 701static int gp2ap020a00f_read_output(struct gp2ap020a00f_data *data,
 702                                        unsigned int output_reg, int *val)
 703{
 704        u8 reg_buf[2];
 705        int err;
 706
 707        err = wait_conversion_complete_irq(data);
 708        if (err < 0)
 709                dev_dbg(&data->client->dev, "data ready timeout\n");
 710
 711        err = regmap_bulk_read(data->regmap, output_reg, reg_buf, 2);
 712        if (err < 0)
 713                return err;
 714
 715        *val = le16_to_cpup((__le16 *)reg_buf);
 716
 717        return err;
 718}
 719
 720static bool gp2ap020a00f_adjust_lux_mode(struct gp2ap020a00f_data *data,
 721                                 int output_val)
 722{
 723        u8 new_range = 0xff;
 724        int err;
 725
 726        if (!test_bit(GP2AP020A00F_FLAG_LUX_MODE_HI, &data->flags)) {
 727                if (output_val > 16000) {
 728                        set_bit(GP2AP020A00F_FLAG_LUX_MODE_HI, &data->flags);
 729                        new_range = GP2AP020A00F_RANGE_A_x128;
 730                }
 731        } else {
 732                if (output_val < 1000) {
 733                        clear_bit(GP2AP020A00F_FLAG_LUX_MODE_HI, &data->flags);
 734                        new_range = GP2AP020A00F_RANGE_A_x8;
 735                }
 736        }
 737
 738        if (new_range != 0xff) {
 739                /* Clear als threshold registers to avoid spurious
 740                 * events caused by lux mode transition.
 741                 */
 742                err =  gp2ap020a00f_write_event_threshold(data,
 743                                        GP2AP020A00F_THRESH_TH, false);
 744                if (err < 0) {
 745                        dev_err(&data->client->dev,
 746                                "Clearing als threshold register failed.\n");
 747                        return false;
 748                }
 749
 750                err =  gp2ap020a00f_write_event_threshold(data,
 751                                        GP2AP020A00F_THRESH_TL, false);
 752                if (err < 0) {
 753                        dev_err(&data->client->dev,
 754                                "Clearing als threshold register failed.\n");
 755                        return false;
 756                }
 757
 758                /* Change lux mode */
 759                err = regmap_update_bits(data->regmap,
 760                        GP2AP020A00F_OP_REG,
 761                        GP2AP020A00F_OP3_MASK,
 762                        GP2AP020A00F_OP3_SHUTDOWN);
 763
 764                if (err < 0) {
 765                        dev_err(&data->client->dev,
 766                                "Shutting down the device failed.\n");
 767                        return false;
 768                }
 769
 770                err = regmap_update_bits(data->regmap,
 771                        GP2AP020A00F_ALS_REG,
 772                        GP2AP020A00F_RANGE_A_MASK,
 773                        new_range);
 774
 775                if (err < 0) {
 776                        dev_err(&data->client->dev,
 777                                "Adjusting device lux mode failed.\n");
 778                        return false;
 779                }
 780
 781                err = regmap_update_bits(data->regmap,
 782                        GP2AP020A00F_OP_REG,
 783                        GP2AP020A00F_OP3_MASK,
 784                        GP2AP020A00F_OP3_OPERATION);
 785
 786                if (err < 0) {
 787                        dev_err(&data->client->dev,
 788                                "Powering up the device failed.\n");
 789                        return false;
 790                }
 791
 792                /* Adjust als threshold register values to the new lux mode */
 793                if (test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags)) {
 794                        err =  gp2ap020a00f_write_event_threshold(data,
 795                                        GP2AP020A00F_THRESH_TH, true);
 796                        if (err < 0) {
 797                                dev_err(&data->client->dev,
 798                                "Adjusting als threshold value failed.\n");
 799                                return false;
 800                        }
 801                }
 802
 803                if (test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags)) {
 804                        err =  gp2ap020a00f_write_event_threshold(data,
 805                                        GP2AP020A00F_THRESH_TL, true);
 806                        if (err < 0) {
 807                                dev_err(&data->client->dev,
 808                                "Adjusting als threshold value failed.\n");
 809                                return false;
 810                        }
 811                }
 812
 813                return true;
 814        }
 815
 816        return false;
 817}
 818
 819static void gp2ap020a00f_output_to_lux(struct gp2ap020a00f_data *data,
 820                                                int *output_val)
 821{
 822        if (test_bit(GP2AP020A00F_FLAG_LUX_MODE_HI, &data->flags))
 823                *output_val *= 16;
 824}
 825
 826static void gp2ap020a00f_iio_trigger_work(struct irq_work *work)
 827{
 828        struct gp2ap020a00f_data *data =
 829                container_of(work, struct gp2ap020a00f_data, work);
 830
 831        iio_trigger_poll(data->trig);
 832}
 833
 834static irqreturn_t gp2ap020a00f_prox_sensing_handler(int irq, void *data)
 835{
 836        struct iio_dev *indio_dev = data;
 837        struct gp2ap020a00f_data *priv = iio_priv(indio_dev);
 838        unsigned int op_reg_val;
 839        int ret;
 840
 841        /* Read interrupt flags */
 842        ret = regmap_read(priv->regmap, GP2AP020A00F_OP_REG, &op_reg_val);
 843        if (ret < 0)
 844                return IRQ_HANDLED;
 845
 846        if (gp2ap020a00f_prox_detect_enabled(priv)) {
 847                if (op_reg_val & GP2AP020A00F_PROX_DETECT) {
 848                        iio_push_event(indio_dev,
 849                               IIO_UNMOD_EVENT_CODE(
 850                                    IIO_PROXIMITY,
 851                                    GP2AP020A00F_SCAN_MODE_PROXIMITY,
 852                                    IIO_EV_TYPE_ROC,
 853                                    IIO_EV_DIR_RISING),
 854                               iio_get_time_ns(indio_dev));
 855                } else {
 856                        iio_push_event(indio_dev,
 857                               IIO_UNMOD_EVENT_CODE(
 858                                    IIO_PROXIMITY,
 859                                    GP2AP020A00F_SCAN_MODE_PROXIMITY,
 860                                    IIO_EV_TYPE_ROC,
 861                                    IIO_EV_DIR_FALLING),
 862                               iio_get_time_ns(indio_dev));
 863                }
 864        }
 865
 866        return IRQ_HANDLED;
 867}
 868
 869static irqreturn_t gp2ap020a00f_thresh_event_handler(int irq, void *data)
 870{
 871        struct iio_dev *indio_dev = data;
 872        struct gp2ap020a00f_data *priv = iio_priv(indio_dev);
 873        u8 op_reg_flags, d0_reg_buf[2];
 874        unsigned int output_val, op_reg_val;
 875        int thresh_val_id, ret;
 876
 877        /* Read interrupt flags */
 878        ret = regmap_read(priv->regmap, GP2AP020A00F_OP_REG,
 879                                                        &op_reg_val);
 880        if (ret < 0)
 881                goto done;
 882
 883        op_reg_flags = op_reg_val & (GP2AP020A00F_FLAG_A | GP2AP020A00F_FLAG_P
 884                                        | GP2AP020A00F_PROX_DETECT);
 885
 886        op_reg_val &= (~GP2AP020A00F_FLAG_A & ~GP2AP020A00F_FLAG_P
 887                                        & ~GP2AP020A00F_PROX_DETECT);
 888
 889        /* Clear interrupt flags (if not in INTTYPE_PULSE mode) */
 890        if (priv->cur_opmode != GP2AP020A00F_OPMODE_PROX_DETECT) {
 891                ret = regmap_write(priv->regmap, GP2AP020A00F_OP_REG,
 892                                                                op_reg_val);
 893                if (ret < 0)
 894                        goto done;
 895        }
 896
 897        if (op_reg_flags & GP2AP020A00F_FLAG_A) {
 898                /* Check D0 register to assess if the lux mode
 899                 * transition is required.
 900                 */
 901                ret = regmap_bulk_read(priv->regmap, GP2AP020A00F_D0_L_REG,
 902                                                        d0_reg_buf, 2);
 903                if (ret < 0)
 904                        goto done;
 905
 906                output_val = le16_to_cpup((__le16 *)d0_reg_buf);
 907
 908                if (gp2ap020a00f_adjust_lux_mode(priv, output_val))
 909                        goto done;
 910
 911                gp2ap020a00f_output_to_lux(priv, &output_val);
 912
 913                /*
 914                 * We need to check output value to distinguish
 915                 * between high and low ambient light threshold event.
 916                 */
 917                if (test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &priv->flags)) {
 918                        thresh_val_id =
 919                            GP2AP020A00F_THRESH_VAL_ID(GP2AP020A00F_TH_L_REG);
 920                        if (output_val > priv->thresh_val[thresh_val_id])
 921                                iio_push_event(indio_dev,
 922                                       IIO_MOD_EVENT_CODE(
 923                                            IIO_LIGHT,
 924                                            GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR,
 925                                            IIO_MOD_LIGHT_CLEAR,
 926                                            IIO_EV_TYPE_THRESH,
 927                                            IIO_EV_DIR_RISING),
 928                                       iio_get_time_ns(indio_dev));
 929                }
 930
 931                if (test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &priv->flags)) {
 932                        thresh_val_id =
 933                            GP2AP020A00F_THRESH_VAL_ID(GP2AP020A00F_TL_L_REG);
 934                        if (output_val < priv->thresh_val[thresh_val_id])
 935                                iio_push_event(indio_dev,
 936                                       IIO_MOD_EVENT_CODE(
 937                                            IIO_LIGHT,
 938                                            GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR,
 939                                            IIO_MOD_LIGHT_CLEAR,
 940                                            IIO_EV_TYPE_THRESH,
 941                                            IIO_EV_DIR_FALLING),
 942                                       iio_get_time_ns(indio_dev));
 943                }
 944        }
 945
 946        if (priv->cur_opmode == GP2AP020A00F_OPMODE_READ_RAW_CLEAR ||
 947            priv->cur_opmode == GP2AP020A00F_OPMODE_READ_RAW_IR ||
 948            priv->cur_opmode == GP2AP020A00F_OPMODE_READ_RAW_PROXIMITY) {
 949                set_bit(GP2AP020A00F_FLAG_DATA_READY, &priv->flags);
 950                wake_up(&priv->data_ready_queue);
 951                goto done;
 952        }
 953
 954        if (test_bit(GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER, &priv->flags) ||
 955            test_bit(GP2AP020A00F_FLAG_ALS_IR_TRIGGER, &priv->flags) ||
 956            test_bit(GP2AP020A00F_FLAG_PROX_TRIGGER, &priv->flags))
 957                /* This fires off the trigger. */
 958                irq_work_queue(&priv->work);
 959
 960done:
 961        return IRQ_HANDLED;
 962}
 963
 964static irqreturn_t gp2ap020a00f_trigger_handler(int irq, void *data)
 965{
 966        struct iio_poll_func *pf = data;
 967        struct iio_dev *indio_dev = pf->indio_dev;
 968        struct gp2ap020a00f_data *priv = iio_priv(indio_dev);
 969        size_t d_size = 0;
 970        int i, out_val, ret;
 971
 972        for_each_set_bit(i, indio_dev->active_scan_mask,
 973                indio_dev->masklength) {
 974                ret = regmap_bulk_read(priv->regmap,
 975                                GP2AP020A00F_DATA_REG(i),
 976                                &priv->buffer[d_size], 2);
 977                if (ret < 0)
 978                        goto done;
 979
 980                if (i == GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR ||
 981                    i == GP2AP020A00F_SCAN_MODE_LIGHT_IR) {
 982                        out_val = le16_to_cpup((__le16 *)&priv->buffer[d_size]);
 983                        gp2ap020a00f_output_to_lux(priv, &out_val);
 984
 985                        put_unaligned_le32(out_val, &priv->buffer[d_size]);
 986                        d_size += 4;
 987                } else {
 988                        d_size += 2;
 989                }
 990        }
 991
 992        iio_push_to_buffers_with_timestamp(indio_dev, priv->buffer,
 993                pf->timestamp);
 994done:
 995        iio_trigger_notify_done(indio_dev->trig);
 996
 997        return IRQ_HANDLED;
 998}
 999
1000static u8 gp2ap020a00f_get_thresh_reg(const struct iio_chan_spec *chan,
1001                                             enum iio_event_direction event_dir)
1002{
1003        switch (chan->type) {
1004        case IIO_PROXIMITY:
1005                if (event_dir == IIO_EV_DIR_RISING)
1006                        return GP2AP020A00F_PH_L_REG;
1007                else
1008                        return GP2AP020A00F_PL_L_REG;
1009        case IIO_LIGHT:
1010                if (event_dir == IIO_EV_DIR_RISING)
1011                        return GP2AP020A00F_TH_L_REG;
1012                else
1013                        return GP2AP020A00F_TL_L_REG;
1014        default:
1015                break;
1016        }
1017
1018        return -EINVAL;
1019}
1020
1021static int gp2ap020a00f_write_event_val(struct iio_dev *indio_dev,
1022                                        const struct iio_chan_spec *chan,
1023                                        enum iio_event_type type,
1024                                        enum iio_event_direction dir,
1025                                        enum iio_event_info info,
1026                                        int val, int val2)
1027{
1028        struct gp2ap020a00f_data *data = iio_priv(indio_dev);
1029        bool event_en = false;
1030        u8 thresh_val_id;
1031        u8 thresh_reg_l;
1032        int err = 0;
1033
1034        mutex_lock(&data->lock);
1035
1036        thresh_reg_l = gp2ap020a00f_get_thresh_reg(chan, dir);
1037        thresh_val_id = GP2AP020A00F_THRESH_VAL_ID(thresh_reg_l);
1038
1039        if (thresh_val_id > GP2AP020A00F_THRESH_PH) {
1040                err = -EINVAL;
1041                goto error_unlock;
1042        }
1043
1044        switch (thresh_reg_l) {
1045        case GP2AP020A00F_TH_L_REG:
1046                event_en = test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV,
1047                                                        &data->flags);
1048                break;
1049        case GP2AP020A00F_TL_L_REG:
1050                event_en = test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV,
1051                                                        &data->flags);
1052                break;
1053        case GP2AP020A00F_PH_L_REG:
1054                if (val == 0) {
1055                        err = -EINVAL;
1056                        goto error_unlock;
1057                }
1058                event_en = test_bit(GP2AP020A00F_FLAG_PROX_RISING_EV,
1059                                                        &data->flags);
1060                break;
1061        case GP2AP020A00F_PL_L_REG:
1062                if (val == 0) {
1063                        err = -EINVAL;
1064                        goto error_unlock;
1065                }
1066                event_en = test_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV,
1067                                                        &data->flags);
1068                break;
1069        }
1070
1071        data->thresh_val[thresh_val_id] = val;
1072        err =  gp2ap020a00f_write_event_threshold(data, thresh_val_id,
1073                                                        event_en);
1074error_unlock:
1075        mutex_unlock(&data->lock);
1076
1077        return err;
1078}
1079
1080static int gp2ap020a00f_read_event_val(struct iio_dev *indio_dev,
1081                                       const struct iio_chan_spec *chan,
1082                                       enum iio_event_type type,
1083                                       enum iio_event_direction dir,
1084                                       enum iio_event_info info,
1085                                       int *val, int *val2)
1086{
1087        struct gp2ap020a00f_data *data = iio_priv(indio_dev);
1088        u8 thresh_reg_l;
1089        int err = IIO_VAL_INT;
1090
1091        mutex_lock(&data->lock);
1092
1093        thresh_reg_l = gp2ap020a00f_get_thresh_reg(chan, dir);
1094
1095        if (thresh_reg_l > GP2AP020A00F_PH_L_REG) {
1096                err = -EINVAL;
1097                goto error_unlock;
1098        }
1099
1100        *val = data->thresh_val[GP2AP020A00F_THRESH_VAL_ID(thresh_reg_l)];
1101
1102error_unlock:
1103        mutex_unlock(&data->lock);
1104
1105        return err;
1106}
1107
1108static int gp2ap020a00f_write_prox_event_config(struct iio_dev *indio_dev,
1109                                                int state)
1110{
1111        struct gp2ap020a00f_data *data = iio_priv(indio_dev);
1112        enum gp2ap020a00f_cmd cmd_high_ev, cmd_low_ev;
1113        int err;
1114
1115        cmd_high_ev = state ? GP2AP020A00F_CMD_PROX_HIGH_EV_EN :
1116                              GP2AP020A00F_CMD_PROX_HIGH_EV_DIS;
1117        cmd_low_ev = state ? GP2AP020A00F_CMD_PROX_LOW_EV_EN :
1118                             GP2AP020A00F_CMD_PROX_LOW_EV_DIS;
1119
1120        /*
1121         * In order to enable proximity detection feature in the device
1122         * both high and low threshold registers have to be written
1123         * with different values, greater than zero.
1124         */
1125        if (state) {
1126                if (data->thresh_val[GP2AP020A00F_THRESH_PL] == 0)
1127                        return -EINVAL;
1128
1129                if (data->thresh_val[GP2AP020A00F_THRESH_PH] == 0)
1130                        return -EINVAL;
1131        }
1132
1133        err = gp2ap020a00f_exec_cmd(data, cmd_high_ev);
1134        if (err < 0)
1135                return err;
1136
1137        err = gp2ap020a00f_exec_cmd(data, cmd_low_ev);
1138        if (err < 0)
1139                return err;
1140
1141        free_irq(data->client->irq, indio_dev);
1142
1143        if (state)
1144                err = request_threaded_irq(data->client->irq, NULL,
1145                                           &gp2ap020a00f_prox_sensing_handler,
1146                                           IRQF_TRIGGER_RISING |
1147                                           IRQF_TRIGGER_FALLING |
1148                                           IRQF_ONESHOT,
1149                                           "gp2ap020a00f_prox_sensing",
1150                                           indio_dev);
1151        else {
1152                err = request_threaded_irq(data->client->irq, NULL,
1153                                           &gp2ap020a00f_thresh_event_handler,
1154                                           IRQF_TRIGGER_FALLING |
1155                                           IRQF_ONESHOT,
1156                                           "gp2ap020a00f_thresh_event",
1157                                           indio_dev);
1158        }
1159
1160        return err;
1161}
1162
1163static int gp2ap020a00f_write_event_config(struct iio_dev *indio_dev,
1164                                           const struct iio_chan_spec *chan,
1165                                           enum iio_event_type type,
1166                                           enum iio_event_direction dir,
1167                                           int state)
1168{
1169        struct gp2ap020a00f_data *data = iio_priv(indio_dev);
1170        enum gp2ap020a00f_cmd cmd;
1171        int err;
1172
1173        mutex_lock(&data->lock);
1174
1175        switch (chan->type) {
1176        case IIO_PROXIMITY:
1177                err = gp2ap020a00f_write_prox_event_config(indio_dev, state);
1178                break;
1179        case IIO_LIGHT:
1180                if (dir == IIO_EV_DIR_RISING) {
1181                        cmd = state ? GP2AP020A00F_CMD_ALS_HIGH_EV_EN :
1182                                      GP2AP020A00F_CMD_ALS_HIGH_EV_DIS;
1183                        err = gp2ap020a00f_exec_cmd(data, cmd);
1184                } else {
1185                        cmd = state ? GP2AP020A00F_CMD_ALS_LOW_EV_EN :
1186                                      GP2AP020A00F_CMD_ALS_LOW_EV_DIS;
1187                        err = gp2ap020a00f_exec_cmd(data, cmd);
1188                }
1189                break;
1190        default:
1191                err = -EINVAL;
1192        }
1193
1194        mutex_unlock(&data->lock);
1195
1196        return err;
1197}
1198
1199static int gp2ap020a00f_read_event_config(struct iio_dev *indio_dev,
1200                                           const struct iio_chan_spec *chan,
1201                                           enum iio_event_type type,
1202                                           enum iio_event_direction dir)
1203{
1204        struct gp2ap020a00f_data *data = iio_priv(indio_dev);
1205        int event_en = 0;
1206
1207        mutex_lock(&data->lock);
1208
1209        switch (chan->type) {
1210        case IIO_PROXIMITY:
1211                if (dir == IIO_EV_DIR_RISING)
1212                        event_en = test_bit(GP2AP020A00F_FLAG_PROX_RISING_EV,
1213                                                                &data->flags);
1214                else
1215                        event_en = test_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV,
1216                                                                &data->flags);
1217                break;
1218        case IIO_LIGHT:
1219                if (dir == IIO_EV_DIR_RISING)
1220                        event_en = test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV,
1221                                                                &data->flags);
1222                else
1223                        event_en = test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV,
1224                                                                &data->flags);
1225                break;
1226        default:
1227                event_en = -EINVAL;
1228                break;
1229        }
1230
1231        mutex_unlock(&data->lock);
1232
1233        return event_en;
1234}
1235
1236static int gp2ap020a00f_read_channel(struct gp2ap020a00f_data *data,
1237                                struct iio_chan_spec const *chan, int *val)
1238{
1239        enum gp2ap020a00f_cmd cmd;
1240        int err;
1241
1242        switch (chan->scan_index) {
1243        case GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR:
1244                cmd = GP2AP020A00F_CMD_READ_RAW_CLEAR;
1245                break;
1246        case GP2AP020A00F_SCAN_MODE_LIGHT_IR:
1247                cmd = GP2AP020A00F_CMD_READ_RAW_IR;
1248                break;
1249        case GP2AP020A00F_SCAN_MODE_PROXIMITY:
1250                cmd = GP2AP020A00F_CMD_READ_RAW_PROXIMITY;
1251                break;
1252        default:
1253                return -EINVAL;
1254        }
1255
1256        err = gp2ap020a00f_exec_cmd(data, cmd);
1257        if (err < 0) {
1258                dev_err(&data->client->dev,
1259                        "gp2ap020a00f_exec_cmd failed\n");
1260                goto error_ret;
1261        }
1262
1263        err = gp2ap020a00f_read_output(data, chan->address, val);
1264        if (err < 0)
1265                dev_err(&data->client->dev,
1266                        "gp2ap020a00f_read_output failed\n");
1267
1268        err = gp2ap020a00f_set_operation_mode(data,
1269                                        GP2AP020A00F_OPMODE_SHUTDOWN);
1270        if (err < 0)
1271                dev_err(&data->client->dev,
1272                        "Failed to shut down the device.\n");
1273
1274        if (cmd == GP2AP020A00F_CMD_READ_RAW_CLEAR ||
1275            cmd == GP2AP020A00F_CMD_READ_RAW_IR)
1276                gp2ap020a00f_output_to_lux(data, val);
1277
1278error_ret:
1279        return err;
1280}
1281
1282static int gp2ap020a00f_read_raw(struct iio_dev *indio_dev,
1283                           struct iio_chan_spec const *chan,
1284                           int *val, int *val2,
1285                           long mask)
1286{
1287        struct gp2ap020a00f_data *data = iio_priv(indio_dev);
1288        int err = -EINVAL;
1289
1290        if (mask == IIO_CHAN_INFO_RAW) {
1291                err = iio_device_claim_direct_mode(indio_dev);
1292                if (err)
1293                        return err;
1294
1295                err = gp2ap020a00f_read_channel(data, chan, val);
1296                iio_device_release_direct_mode(indio_dev);
1297        }
1298        return err < 0 ? err : IIO_VAL_INT;
1299}
1300
1301static const struct iio_event_spec gp2ap020a00f_event_spec_light[] = {
1302        {
1303                .type = IIO_EV_TYPE_THRESH,
1304                .dir = IIO_EV_DIR_RISING,
1305                .mask_separate = BIT(IIO_EV_INFO_VALUE) |
1306                        BIT(IIO_EV_INFO_ENABLE),
1307        }, {
1308                .type = IIO_EV_TYPE_THRESH,
1309                .dir = IIO_EV_DIR_FALLING,
1310                .mask_separate = BIT(IIO_EV_INFO_VALUE) |
1311                        BIT(IIO_EV_INFO_ENABLE),
1312        },
1313};
1314
1315static const struct iio_event_spec gp2ap020a00f_event_spec_prox[] = {
1316        {
1317                .type = IIO_EV_TYPE_ROC,
1318                .dir = IIO_EV_DIR_RISING,
1319                .mask_separate = BIT(IIO_EV_INFO_VALUE) |
1320                        BIT(IIO_EV_INFO_ENABLE),
1321        }, {
1322                .type = IIO_EV_TYPE_ROC,
1323                .dir = IIO_EV_DIR_FALLING,
1324                .mask_separate = BIT(IIO_EV_INFO_VALUE) |
1325                        BIT(IIO_EV_INFO_ENABLE),
1326        },
1327};
1328
1329static const struct iio_chan_spec gp2ap020a00f_channels[] = {
1330        {
1331                .type = IIO_LIGHT,
1332                .channel2 = IIO_MOD_LIGHT_CLEAR,
1333                .modified = 1,
1334                .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1335                .scan_type = {
1336                        .sign = 'u',
1337                        .realbits = 24,
1338                        .shift = 0,
1339                        .storagebits = 32,
1340                        .endianness = IIO_LE,
1341                },
1342                .scan_index = GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR,
1343                .address = GP2AP020A00F_D0_L_REG,
1344                .event_spec = gp2ap020a00f_event_spec_light,
1345                .num_event_specs = ARRAY_SIZE(gp2ap020a00f_event_spec_light),
1346        },
1347        {
1348                .type = IIO_LIGHT,
1349                .channel2 = IIO_MOD_LIGHT_IR,
1350                .modified = 1,
1351                .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1352                .scan_type = {
1353                        .sign = 'u',
1354                        .realbits = 24,
1355                        .shift = 0,
1356                        .storagebits = 32,
1357                        .endianness = IIO_LE,
1358                },
1359                .scan_index = GP2AP020A00F_SCAN_MODE_LIGHT_IR,
1360                .address = GP2AP020A00F_D1_L_REG,
1361        },
1362        {
1363                .type = IIO_PROXIMITY,
1364                .modified = 0,
1365                .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
1366                .scan_type = {
1367                        .sign = 'u',
1368                        .realbits = 16,
1369                        .shift = 0,
1370                        .storagebits = 16,
1371                        .endianness = IIO_LE,
1372                },
1373                .scan_index = GP2AP020A00F_SCAN_MODE_PROXIMITY,
1374                .address = GP2AP020A00F_D2_L_REG,
1375                .event_spec = gp2ap020a00f_event_spec_prox,
1376                .num_event_specs = ARRAY_SIZE(gp2ap020a00f_event_spec_prox),
1377        },
1378        IIO_CHAN_SOFT_TIMESTAMP(GP2AP020A00F_CHAN_TIMESTAMP),
1379};
1380
1381static const struct iio_info gp2ap020a00f_info = {
1382        .read_raw = &gp2ap020a00f_read_raw,
1383        .read_event_value = &gp2ap020a00f_read_event_val,
1384        .read_event_config = &gp2ap020a00f_read_event_config,
1385        .write_event_value = &gp2ap020a00f_write_event_val,
1386        .write_event_config = &gp2ap020a00f_write_event_config,
1387};
1388
1389static int gp2ap020a00f_buffer_postenable(struct iio_dev *indio_dev)
1390{
1391        struct gp2ap020a00f_data *data = iio_priv(indio_dev);
1392        int i, err = 0;
1393
1394        mutex_lock(&data->lock);
1395
1396        /*
1397         * Enable triggers according to the scan_mask. Enabling either
1398         * LIGHT_CLEAR or LIGHT_IR scan mode results in enabling ALS
1399         * module in the device, which generates samples in both D0 (clear)
1400         * and D1 (ir) registers. As the two registers are bound to the
1401         * two separate IIO channels they are treated in the driver logic
1402         * as if they were controlled independently.
1403         */
1404        for_each_set_bit(i, indio_dev->active_scan_mask,
1405                indio_dev->masklength) {
1406                switch (i) {
1407                case GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR:
1408                        err = gp2ap020a00f_exec_cmd(data,
1409                                        GP2AP020A00F_CMD_TRIGGER_CLEAR_EN);
1410                        break;
1411                case GP2AP020A00F_SCAN_MODE_LIGHT_IR:
1412                        err = gp2ap020a00f_exec_cmd(data,
1413                                        GP2AP020A00F_CMD_TRIGGER_IR_EN);
1414                        break;
1415                case GP2AP020A00F_SCAN_MODE_PROXIMITY:
1416                        err = gp2ap020a00f_exec_cmd(data,
1417                                        GP2AP020A00F_CMD_TRIGGER_PROX_EN);
1418                        break;
1419                }
1420        }
1421
1422        if (err < 0)
1423                goto error_unlock;
1424
1425        data->buffer = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
1426        if (!data->buffer) {
1427                err = -ENOMEM;
1428                goto error_unlock;
1429        }
1430
1431        err = iio_triggered_buffer_postenable(indio_dev);
1432
1433error_unlock:
1434        mutex_unlock(&data->lock);
1435
1436        return err;
1437}
1438
1439static int gp2ap020a00f_buffer_predisable(struct iio_dev *indio_dev)
1440{
1441        struct gp2ap020a00f_data *data = iio_priv(indio_dev);
1442        int i, err;
1443
1444        mutex_lock(&data->lock);
1445
1446        err = iio_triggered_buffer_predisable(indio_dev);
1447        if (err < 0)
1448                goto error_unlock;
1449
1450        for_each_set_bit(i, indio_dev->active_scan_mask,
1451                indio_dev->masklength) {
1452                switch (i) {
1453                case GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR:
1454                        err = gp2ap020a00f_exec_cmd(data,
1455                                        GP2AP020A00F_CMD_TRIGGER_CLEAR_DIS);
1456                        break;
1457                case GP2AP020A00F_SCAN_MODE_LIGHT_IR:
1458                        err = gp2ap020a00f_exec_cmd(data,
1459                                        GP2AP020A00F_CMD_TRIGGER_IR_DIS);
1460                        break;
1461                case GP2AP020A00F_SCAN_MODE_PROXIMITY:
1462                        err = gp2ap020a00f_exec_cmd(data,
1463                                        GP2AP020A00F_CMD_TRIGGER_PROX_DIS);
1464                        break;
1465                }
1466        }
1467
1468        if (err == 0)
1469                kfree(data->buffer);
1470
1471error_unlock:
1472        mutex_unlock(&data->lock);
1473
1474        return err;
1475}
1476
1477static const struct iio_buffer_setup_ops gp2ap020a00f_buffer_setup_ops = {
1478        .postenable = &gp2ap020a00f_buffer_postenable,
1479        .predisable = &gp2ap020a00f_buffer_predisable,
1480};
1481
1482static const struct iio_trigger_ops gp2ap020a00f_trigger_ops = {
1483};
1484
1485static int gp2ap020a00f_probe(struct i2c_client *client,
1486                                const struct i2c_device_id *id)
1487{
1488        struct gp2ap020a00f_data *data;
1489        struct iio_dev *indio_dev;
1490        struct regmap *regmap;
1491        int err;
1492
1493        indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
1494        if (!indio_dev)
1495                return -ENOMEM;
1496
1497        data = iio_priv(indio_dev);
1498
1499        data->vled_reg = devm_regulator_get(&client->dev, "vled");
1500        if (IS_ERR(data->vled_reg))
1501                return PTR_ERR(data->vled_reg);
1502
1503        err = regulator_enable(data->vled_reg);
1504        if (err)
1505                return err;
1506
1507        regmap = devm_regmap_init_i2c(client, &gp2ap020a00f_regmap_config);
1508        if (IS_ERR(regmap)) {
1509                dev_err(&client->dev, "Regmap initialization failed.\n");
1510                err = PTR_ERR(regmap);
1511                goto error_regulator_disable;
1512        }
1513
1514        /* Initialize device registers */
1515        err = regmap_bulk_write(regmap, GP2AP020A00F_OP_REG,
1516                        gp2ap020a00f_reg_init_tab,
1517                        ARRAY_SIZE(gp2ap020a00f_reg_init_tab));
1518
1519        if (err < 0) {
1520                dev_err(&client->dev, "Device initialization failed.\n");
1521                goto error_regulator_disable;
1522        }
1523
1524        i2c_set_clientdata(client, indio_dev);
1525
1526        data->client = client;
1527        data->cur_opmode = GP2AP020A00F_OPMODE_SHUTDOWN;
1528        data->regmap = regmap;
1529        init_waitqueue_head(&data->data_ready_queue);
1530
1531        mutex_init(&data->lock);
1532        indio_dev->dev.parent = &client->dev;
1533        indio_dev->channels = gp2ap020a00f_channels;
1534        indio_dev->num_channels = ARRAY_SIZE(gp2ap020a00f_channels);
1535        indio_dev->info = &gp2ap020a00f_info;
1536        indio_dev->name = id->name;
1537        indio_dev->modes = INDIO_DIRECT_MODE;
1538
1539        /* Allocate buffer */
1540        err = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
1541                &gp2ap020a00f_trigger_handler, &gp2ap020a00f_buffer_setup_ops);
1542        if (err < 0)
1543                goto error_regulator_disable;
1544
1545        /* Allocate trigger */
1546        data->trig = devm_iio_trigger_alloc(&client->dev, "%s-trigger",
1547                                                        indio_dev->name);
1548        if (data->trig == NULL) {
1549                err = -ENOMEM;
1550                dev_err(&indio_dev->dev, "Failed to allocate iio trigger.\n");
1551                goto error_uninit_buffer;
1552        }
1553
1554        /* This needs to be requested here for read_raw calls to work. */
1555        err = request_threaded_irq(client->irq, NULL,
1556                                   &gp2ap020a00f_thresh_event_handler,
1557                                   IRQF_TRIGGER_FALLING |
1558                                   IRQF_ONESHOT,
1559                                   "gp2ap020a00f_als_event",
1560                                   indio_dev);
1561        if (err < 0) {
1562                dev_err(&client->dev, "Irq request failed.\n");
1563                goto error_uninit_buffer;
1564        }
1565
1566        data->trig->ops = &gp2ap020a00f_trigger_ops;
1567        data->trig->dev.parent = &data->client->dev;
1568
1569        init_irq_work(&data->work, gp2ap020a00f_iio_trigger_work);
1570
1571        err = iio_trigger_register(data->trig);
1572        if (err < 0) {
1573                dev_err(&client->dev, "Failed to register iio trigger.\n");
1574                goto error_free_irq;
1575        }
1576
1577        err = iio_device_register(indio_dev);
1578        if (err < 0)
1579                goto error_trigger_unregister;
1580
1581        return 0;
1582
1583error_trigger_unregister:
1584        iio_trigger_unregister(data->trig);
1585error_free_irq:
1586        free_irq(client->irq, indio_dev);
1587error_uninit_buffer:
1588        iio_triggered_buffer_cleanup(indio_dev);
1589error_regulator_disable:
1590        regulator_disable(data->vled_reg);
1591
1592        return err;
1593}
1594
1595static int gp2ap020a00f_remove(struct i2c_client *client)
1596{
1597        struct iio_dev *indio_dev = i2c_get_clientdata(client);
1598        struct gp2ap020a00f_data *data = iio_priv(indio_dev);
1599        int err;
1600
1601        err = gp2ap020a00f_set_operation_mode(data,
1602                                        GP2AP020A00F_OPMODE_SHUTDOWN);
1603        if (err < 0)
1604                dev_err(&indio_dev->dev, "Failed to power off the device.\n");
1605
1606        iio_device_unregister(indio_dev);
1607        iio_trigger_unregister(data->trig);
1608        free_irq(client->irq, indio_dev);
1609        iio_triggered_buffer_cleanup(indio_dev);
1610        regulator_disable(data->vled_reg);
1611
1612        return 0;
1613}
1614
1615static const struct i2c_device_id gp2ap020a00f_id[] = {
1616        { GP2A_I2C_NAME, 0 },
1617        { }
1618};
1619
1620MODULE_DEVICE_TABLE(i2c, gp2ap020a00f_id);
1621
1622#ifdef CONFIG_OF
1623static const struct of_device_id gp2ap020a00f_of_match[] = {
1624        { .compatible = "sharp,gp2ap020a00f" },
1625        { }
1626};
1627MODULE_DEVICE_TABLE(of, gp2ap020a00f_of_match);
1628#endif
1629
1630static struct i2c_driver gp2ap020a00f_driver = {
1631        .driver = {
1632                .name   = GP2A_I2C_NAME,
1633                .of_match_table = of_match_ptr(gp2ap020a00f_of_match),
1634        },
1635        .probe          = gp2ap020a00f_probe,
1636        .remove         = gp2ap020a00f_remove,
1637        .id_table       = gp2ap020a00f_id,
1638};
1639
1640module_i2c_driver(gp2ap020a00f_driver);
1641
1642MODULE_AUTHOR("Jacek Anaszewski <j.anaszewski@samsung.com>");
1643MODULE_DESCRIPTION("Sharp GP2AP020A00F Proximity/ALS sensor driver");
1644MODULE_LICENSE("GPL v2");
1645