drivers/iio/proximity/sx9310.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright 2018 Google LLC.
   4  *
   5  * Driver for Semtech's SX9310/SX9311 capacitive proximity/button solution.
   6  * Based on SX9500 driver and Semtech driver using the input framework
   7  * <https://my.syncplicity.com/share/teouwsim8niiaud/
   8  *          linux-driver-SX9310_NoSmartHSensing>.
   9  * Reworked in April 2019 by Evan Green <evgreen@chromium.org>
  10  * and in January 2020 by Daniel Campello <campello@chromium.org>.
  11  */
  12
  13 #include <linux/bitfield.h>
  14 #include <linux/delay.h>
  15 #include <linux/i2c.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/kernel.h>
  18 #include <linux/log2.h>
  19 #include <linux/mod_devicetable.h>
  20 #include <linux/module.h>
  21 #include <linux/pm.h>
  22 #include <linux/property.h>
  23 #include <linux/regmap.h>
  24 #include <linux/iio/iio.h>
  25
  26 #include "sx_common.h"
  27
  28 /* Register definitions. */
  29 #define SX9310_REG_IRQ_SRC                              SX_COMMON_REG_IRQ_SRC
  30 #define SX9310_REG_STAT0                                0x01
  31 #define SX9310_REG_STAT1                                0x02
  32 #define SX9310_REG_STAT1_COMPSTAT_MASK                  GENMASK(3, 0)
  33 #define SX9310_REG_IRQ_MSK                              0x03
  34 #define   SX9310_CONVDONE_IRQ                           BIT(3)
  35 #define   SX9310_FAR_IRQ                                BIT(5)
  36 #define   SX9310_CLOSE_IRQ                              BIT(6)
  37 #define SX9310_REG_IRQ_FUNC                             0x04
  38
  39 #define SX9310_REG_PROX_CTRL0                           0x10
  40 #define   SX9310_REG_PROX_CTRL0_SENSOREN_MASK           GENMASK(3, 0)
  41 #define   SX9310_REG_PROX_CTRL0_SCANPERIOD_MASK         GENMASK(7, 4)
  42 #define   SX9310_REG_PROX_CTRL0_SCANPERIOD_15MS         0x01
  43 #define SX9310_REG_PROX_CTRL1                           0x11
  44 #define SX9310_REG_PROX_CTRL2                           0x12
  45 #define   SX9310_REG_PROX_CTRL2_COMBMODE_MASK           GENMASK(7, 6)
  46 #define   SX9310_REG_PROX_CTRL2_COMBMODE_CS0_CS1_CS2_CS3 (0x03 << 6)
  47 #define   SX9310_REG_PROX_CTRL2_COMBMODE_CS1_CS2        (0x02 << 6)
  48 #define   SX9310_REG_PROX_CTRL2_COMBMODE_CS0_CS1        (0x01 << 6)
  49 #define   SX9310_REG_PROX_CTRL2_COMBMODE_CS3            (0x00 << 6)
  50 #define   SX9310_REG_PROX_CTRL2_SHIELDEN_MASK           GENMASK(3, 2)
  51 #define   SX9310_REG_PROX_CTRL2_SHIELDEN_DYNAMIC        (0x01 << 2)
  52 #define   SX9310_REG_PROX_CTRL2_SHIELDEN_GROUND         (0x02 << 2)
  53 #define SX9310_REG_PROX_CTRL3                           0x13
  54 #define   SX9310_REG_PROX_CTRL3_GAIN0_MASK              GENMASK(3, 2)
  55 #define   SX9310_REG_PROX_CTRL3_GAIN0_X8                (0x03 << 2)
  56 #define   SX9310_REG_PROX_CTRL3_GAIN12_MASK             GENMASK(1, 0)
  57 #define   SX9310_REG_PROX_CTRL3_GAIN12_X4               0x02
  58 #define SX9310_REG_PROX_CTRL4                           0x14
  59 #define   SX9310_REG_PROX_CTRL4_RESOLUTION_MASK         GENMASK(2, 0)
  60 #define   SX9310_REG_PROX_CTRL4_RESOLUTION_FINEST       0x07
  61 #define   SX9310_REG_PROX_CTRL4_RESOLUTION_VERY_FINE    0x06
  62 #define   SX9310_REG_PROX_CTRL4_RESOLUTION_FINE         0x05
  63 #define   SX9310_REG_PROX_CTRL4_RESOLUTION_MEDIUM       0x04
  64 #define   SX9310_REG_PROX_CTRL4_RESOLUTION_MEDIUM_COARSE 0x03
  65 #define   SX9310_REG_PROX_CTRL4_RESOLUTION_COARSE       0x02
  66 #define   SX9310_REG_PROX_CTRL4_RESOLUTION_VERY_COARSE  0x01
  67 #define   SX9310_REG_PROX_CTRL4_RESOLUTION_COARSEST     0x00
  68 #define SX9310_REG_PROX_CTRL5                           0x15
  69 #define   SX9310_REG_PROX_CTRL5_RANGE_SMALL             (0x03 << 6)
  70 #define   SX9310_REG_PROX_CTRL5_STARTUPSENS_MASK        GENMASK(3, 2)
  71 #define   SX9310_REG_PROX_CTRL5_STARTUPSENS_CS1         (0x01 << 2)
  72 #define   SX9310_REG_PROX_CTRL5_RAWFILT_MASK            GENMASK(1, 0)
  73 #define   SX9310_REG_PROX_CTRL5_RAWFILT_SHIFT           0
  74 #define   SX9310_REG_PROX_CTRL5_RAWFILT_1P25            0x02
  75 #define SX9310_REG_PROX_CTRL6                           0x16
  76 #define   SX9310_REG_PROX_CTRL6_AVGTHRESH_DEFAULT       0x20
  77 #define SX9310_REG_PROX_CTRL7                           0x17
  78 #define   SX9310_REG_PROX_CTRL7_AVGNEGFILT_2            (0x01 << 3)
  79 #define   SX9310_REG_PROX_CTRL7_AVGPOSFILT_MASK         GENMASK(2, 0)
  80 #define   SX9310_REG_PROX_CTRL7_AVGPOSFILT_SHIFT        0
  81 #define   SX9310_REG_PROX_CTRL7_AVGPOSFILT_512          0x05
  82 #define SX9310_REG_PROX_CTRL8                           0x18
  83 #define   SX9310_REG_PROX_CTRL8_9_PTHRESH_MASK          GENMASK(7, 3)
  84 #define SX9310_REG_PROX_CTRL9                           0x19
  85 #define   SX9310_REG_PROX_CTRL8_9_PTHRESH_28            (0x08 << 3)
  86 #define   SX9310_REG_PROX_CTRL8_9_PTHRESH_96            (0x11 << 3)
  87 #define   SX9310_REG_PROX_CTRL8_9_BODYTHRESH_900        0x03
  88 #define   SX9310_REG_PROX_CTRL8_9_BODYTHRESH_1500       0x05
  89 #define SX9310_REG_PROX_CTRL10                          0x1a
  90 #define   SX9310_REG_PROX_CTRL10_HYST_MASK              GENMASK(5, 4)
  91 #define   SX9310_REG_PROX_CTRL10_HYST_6PCT              (0x01 << 4)
  92 #define   SX9310_REG_PROX_CTRL10_CLOSE_DEBOUNCE_MASK    GENMASK(3, 2)
  93 #define   SX9310_REG_PROX_CTRL10_FAR_DEBOUNCE_MASK      GENMASK(1, 0)
  94 #define   SX9310_REG_PROX_CTRL10_FAR_DEBOUNCE_2         0x01
  95 #define SX9310_REG_PROX_CTRL11                          0x1b
  96 #define SX9310_REG_PROX_CTRL12                          0x1c
  97 #define SX9310_REG_PROX_CTRL13                          0x1d
  98 #define SX9310_REG_PROX_CTRL14                          0x1e
  99 #define SX9310_REG_PROX_CTRL15                          0x1f
 100 #define SX9310_REG_PROX_CTRL16                          0x20
 101 #define SX9310_REG_PROX_CTRL17                          0x21
 102 #define SX9310_REG_PROX_CTRL18                          0x22
 103 #define SX9310_REG_PROX_CTRL19                          0x23
 104 #define SX9310_REG_SAR_CTRL0                            0x2a
 105 #define   SX9310_REG_SAR_CTRL0_SARDEB_4_SAMPLES         (0x02 << 5)
 106 #define   SX9310_REG_SAR_CTRL0_SARHYST_8                (0x02 << 3)
 107 #define SX9310_REG_SAR_CTRL1                            0x2b
 108 /* Each increment of the slope register is 0.0078125. */
 109 #define   SX9310_REG_SAR_CTRL1_SLOPE(_hnslope)          (_hnslope / 78125)
 110 #define SX9310_REG_SAR_CTRL2                            0x2c
 111 #define   SX9310_REG_SAR_CTRL2_SAROFFSET_DEFAULT        0x3c
 112
 113 #define SX9310_REG_SENSOR_SEL                           0x30
 114 #define SX9310_REG_USE_MSB                              0x31
 115 #define SX9310_REG_USE_LSB                              0x32
 116 #define SX9310_REG_AVG_MSB                              0x33
 117 #define SX9310_REG_AVG_LSB                              0x34
 118 #define SX9310_REG_DIFF_MSB                             0x35
 119 #define SX9310_REG_DIFF_LSB                             0x36
 120 #define SX9310_REG_OFFSET_MSB                           0x37
 121 #define SX9310_REG_OFFSET_LSB                           0x38
 122 #define SX9310_REG_SAR_MSB                              0x39
 123 #define SX9310_REG_SAR_LSB                              0x3a
 124 #define SX9310_REG_I2C_ADDR                             0x40
 125 #define SX9310_REG_PAUSE                                0x41
 126 #define SX9310_REG_WHOAMI                               0x42
 127 #define   SX9310_WHOAMI_VALUE                           0x01
 128 #define   SX9311_WHOAMI_VALUE                           0x02
 129 #define SX9310_REG_RESET                                0x7f
 130
 131
 132 /* 4 hardware channels, as defined in STAT0: COMB, CS2, CS1 and CS0. */
 133 #define SX9310_NUM_CHANNELS                             4
 134 static_assert(SX9310_NUM_CHANNELS <= SX_COMMON_MAX_NUM_CHANNELS);
 135
 136 #define SX9310_NAMED_CHANNEL(idx, name)                          \
 137 {                                                                \
 138         .type = IIO_PROXIMITY,                                   \
 139         .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |           \
 140                               BIT(IIO_CHAN_INFO_HARDWAREGAIN),   \
 141         .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
 142         .info_mask_separate_available =                          \
 143                 BIT(IIO_CHAN_INFO_HARDWAREGAIN),                 \
 144         .info_mask_shared_by_all_available =                     \
 145                 BIT(IIO_CHAN_INFO_SAMP_FREQ),                    \
 146         .indexed = 1,                                            \
 147         .channel = idx,                                          \
 148         .extend_name = name,                                     \
 149         .address = SX9310_REG_DIFF_MSB,                          \
 150         .event_spec = sx_common_events,                          \
 151         .num_event_specs = ARRAY_SIZE(sx_common_events),         \
 152         .scan_index = idx,                                       \
 153         .scan_type = {                                           \
 154                 .sign = 's',                                     \
 155                 .realbits = 12,                                  \
 156                 .storagebits = 16,                               \
 157                 .endianness = IIO_BE,                            \
 158         },                                                       \
 159 }
 160 #define SX9310_CHANNEL(idx) SX9310_NAMED_CHANNEL(idx, NULL)
 161
 162 static const struct iio_chan_spec sx9310_channels[] = {
 163         SX9310_CHANNEL(0),                      /* CS0 */
 164         SX9310_CHANNEL(1),                      /* CS1 */
 165         SX9310_CHANNEL(2),                      /* CS2 */
 166         SX9310_NAMED_CHANNEL(3, "comb"),        /* COMB */
 167
 168         IIO_CHAN_SOFT_TIMESTAMP(4),
 169 };
 170
 171 /*
 172  * Each entry contains the integer part (val) and the fractional part, in micro
 173  * seconds. It conforms to the IIO output IIO_VAL_INT_PLUS_MICRO.
 174  */
 175 static const struct {
 176         int val;
 177         int val2;
 178 } sx9310_samp_freq_table[] = {
 179         { 500, 0 }, /* 0000: Min (no idle time) */
 180         { 66, 666666 }, /* 0001: 15 ms */
 181         { 33, 333333 }, /* 0010: 30 ms (Typ.) */
 182         { 22, 222222 }, /* 0011: 45 ms */
 183         { 16, 666666 }, /* 0100: 60 ms */
 184         { 11, 111111 }, /* 0101: 90 ms */
 185         { 8, 333333 }, /* 0110: 120 ms */
 186         { 5, 0 }, /* 0111: 200 ms */
 187         { 2, 500000 }, /* 1000: 400 ms */
 188         { 1, 666666 }, /* 1001: 600 ms */
 189         { 1, 250000 }, /* 1010: 800 ms */
 190         { 1, 0 }, /* 1011: 1 s */
 191         { 0, 500000 }, /* 1100: 2 s */
 192         { 0, 333333 }, /* 1101: 3 s */
 193         { 0, 250000 }, /* 1110: 4 s */
 194         { 0, 200000 }, /* 1111: 5 s */
 195 };
 196 static const unsigned int sx9310_scan_period_table[] = {
 197         2,   15,  30,  45,   60,   90,   120,  200,
 198         400, 600, 800, 1000, 2000, 3000, 4000, 5000,
 199 };
 200
 201 static const struct regmap_range sx9310_writable_reg_ranges[] = {
 202         regmap_reg_range(SX9310_REG_IRQ_MSK, SX9310_REG_IRQ_FUNC),
 203         regmap_reg_range(SX9310_REG_PROX_CTRL0, SX9310_REG_PROX_CTRL19),
 204         regmap_reg_range(SX9310_REG_SAR_CTRL0, SX9310_REG_SAR_CTRL2),
 205         regmap_reg_range(SX9310_REG_SENSOR_SEL, SX9310_REG_SENSOR_SEL),
 206         regmap_reg_range(SX9310_REG_OFFSET_MSB, SX9310_REG_OFFSET_LSB),
 207         regmap_reg_range(SX9310_REG_PAUSE, SX9310_REG_PAUSE),
 208         regmap_reg_range(SX9310_REG_RESET, SX9310_REG_RESET),
 209 };
 210
 211 static const struct regmap_access_table sx9310_writeable_regs = {
 212         .yes_ranges = sx9310_writable_reg_ranges,
 213         .n_yes_ranges = ARRAY_SIZE(sx9310_writable_reg_ranges),
 214 };
 215
 216 static const struct regmap_range sx9310_readable_reg_ranges[] = {
 217         regmap_reg_range(SX9310_REG_IRQ_SRC, SX9310_REG_IRQ_FUNC),
 218         regmap_reg_range(SX9310_REG_PROX_CTRL0, SX9310_REG_PROX_CTRL19),
 219         regmap_reg_range(SX9310_REG_SAR_CTRL0, SX9310_REG_SAR_CTRL2),
 220         regmap_reg_range(SX9310_REG_SENSOR_SEL, SX9310_REG_SAR_LSB),
 221         regmap_reg_range(SX9310_REG_I2C_ADDR, SX9310_REG_WHOAMI),
 222         regmap_reg_range(SX9310_REG_RESET, SX9310_REG_RESET),
 223 };
 224
 225 static const struct regmap_access_table sx9310_readable_regs = {
 226         .yes_ranges = sx9310_readable_reg_ranges,
 227         .n_yes_ranges = ARRAY_SIZE(sx9310_readable_reg_ranges),
 228 };
 229
 230 static const struct regmap_range sx9310_volatile_reg_ranges[] = {
 231         regmap_reg_range(SX9310_REG_IRQ_SRC, SX9310_REG_STAT1),
 232         regmap_reg_range(SX9310_REG_USE_MSB, SX9310_REG_DIFF_LSB),
 233         regmap_reg_range(SX9310_REG_SAR_MSB, SX9310_REG_SAR_LSB),
 234         regmap_reg_range(SX9310_REG_RESET, SX9310_REG_RESET),
 235 };
 236
 237 static const struct regmap_access_table sx9310_volatile_regs = {
 238         .yes_ranges = sx9310_volatile_reg_ranges,
 239         .n_yes_ranges = ARRAY_SIZE(sx9310_volatile_reg_ranges),
 240 };
 241
 242 static const struct regmap_config sx9310_regmap_config = {
 243         .reg_bits = 8,
 244         .val_bits = 8,
 245
 246         .max_register = SX9310_REG_RESET,
 247         .cache_type = REGCACHE_RBTREE,
 248
 249         .wr_table = &sx9310_writeable_regs,
 250         .rd_table = &sx9310_readable_regs,
 251         .volatile_table = &sx9310_volatile_regs,
 252 };
 253
 254 static int sx9310_read_prox_data(struct sx_common_data *data,
 255                                  const struct iio_chan_spec *chan, __be16 *val)
 256 {
 257         int ret;
 258
 259         ret = regmap_write(data->regmap, SX9310_REG_SENSOR_SEL, chan->channel);
 260         if (ret)
 261                 return ret;
 262
 263         return regmap_bulk_read(data->regmap, chan->address, val, sizeof(*val));
 264 }
 265
 266 /*
 267  * If we have no interrupt support, we have to wait for a scan period
 268  * after enabling a channel to get a result.
 269  */
 270 static int sx9310_wait_for_sample(struct sx_common_data *data)
 271 {
 272         int ret;
 273         unsigned int val;
 274
 275         ret = regmap_read(data->regmap, SX9310_REG_PROX_CTRL0, &val);
 276         if (ret)
 277                 return ret;
 278
 279         val = FIELD_GET(SX9310_REG_PROX_CTRL0_SCANPERIOD_MASK, val);
 280
 281         msleep(sx9310_scan_period_table[val]);
 282
 283         return 0;
 284 }
 285
 286 static int sx9310_read_gain(struct sx_common_data *data,
 287                             const struct iio_chan_spec *chan, int *val)
 288 {
 289         unsigned int regval, gain;
 290         int ret;
 291
 292         ret = regmap_read(data->regmap, SX9310_REG_PROX_CTRL3, &regval);
 293         if (ret)
 294                 return ret;
 295
 296         switch (chan->channel) {
 297         case 0:
 298         case 3:
 299                 gain = FIELD_GET(SX9310_REG_PROX_CTRL3_GAIN0_MASK, regval);
 300                 break;
 301         case 1:
 302         case 2:
 303                 gain = FIELD_GET(SX9310_REG_PROX_CTRL3_GAIN12_MASK, regval);
 304                 break;
 305         default:
 306                 return -EINVAL;
 307         }
 308
 309         *val = 1 << gain;
 310
 311         return IIO_VAL_INT;
 312 }
 313
 314 static int sx9310_read_samp_freq(struct sx_common_data *data, int *val, int *val2)
 315 {
 316         unsigned int regval;
 317         int ret;
 318
 319         ret = regmap_read(data->regmap, SX9310_REG_PROX_CTRL0, &regval);
 320         if (ret)
 321                 return ret;
 322
 323         regval = FIELD_GET(SX9310_REG_PROX_CTRL0_SCANPERIOD_MASK, regval);
 324         *val = sx9310_samp_freq_table[regval].val;
 325         *val2 = sx9310_samp_freq_table[regval].val2;
 326
 327         return IIO_VAL_INT_PLUS_MICRO;
 328 }
 329
 330 static int sx9310_read_raw(struct iio_dev *indio_dev,
 331                            const struct iio_chan_spec *chan, int *val,
 332                            int *val2, long mask)
 333 {
 334         struct sx_common_data *data = iio_priv(indio_dev);
 335         int ret;
 336
 337         if (chan->type != IIO_PROXIMITY)
 338                 return -EINVAL;
 339
 340         switch (mask) {
 341         case IIO_CHAN_INFO_RAW:
 342                 ret = iio_device_claim_direct_mode(indio_dev);
 343                 if (ret)
 344                         return ret;
 345
 346                 ret = sx_common_read_proximity(data, chan, val);
 347                 iio_device_release_direct_mode(indio_dev);
 348                 return ret;
 349         case IIO_CHAN_INFO_HARDWAREGAIN:
 350                 ret = iio_device_claim_direct_mode(indio_dev);
 351                 if (ret)
 352                         return ret;
 353
 354                 ret = sx9310_read_gain(data, chan, val);
 355                 iio_device_release_direct_mode(indio_dev);
 356                 return ret;
 357         case IIO_CHAN_INFO_SAMP_FREQ:
 358                 return sx9310_read_samp_freq(data, val, val2);
 359         default:
 360                 return -EINVAL;
 361         }
 362 }
 363
 364 static const int sx9310_gain_vals[] = { 1, 2, 4, 8 };
 365
 366 static int sx9310_read_avail(struct iio_dev *indio_dev,
 367                              struct iio_chan_spec const *chan,
 368                              const int **vals, int *type, int *length,
 369                              long mask)
 370 {
 371         if (chan->type != IIO_PROXIMITY)
 372                 return -EINVAL;
 373
 374         switch (mask) {
 375         case IIO_CHAN_INFO_HARDWAREGAIN:
 376                 *type = IIO_VAL_INT;
 377                 *length = ARRAY_SIZE(sx9310_gain_vals);
 378                 *vals = sx9310_gain_vals;
 379                 return IIO_AVAIL_LIST;
 380         case IIO_CHAN_INFO_SAMP_FREQ:
 381                 *type = IIO_VAL_INT_PLUS_MICRO;
 382                 *length = ARRAY_SIZE(sx9310_samp_freq_table) * 2;
 383                 *vals = (int *)sx9310_samp_freq_table;
 384                 return IIO_AVAIL_LIST;
 385         default:
 386                 return -EINVAL;
 387         }
 388 }
 389
 390 static const unsigned int sx9310_pthresh_codes[] = {
 391         2, 4, 6, 8, 12, 16, 20, 24, 28, 32, 40, 48, 56, 64, 72, 80, 88, 96, 112,
 392         128, 144, 160, 192, 224, 256, 320, 384, 512, 640, 768, 1024, 1536
 393 };
 394
 395 static int sx9310_get_thresh_reg(unsigned int channel)
 396 {
 397         switch (channel) {
 398         case 0:
 399         case 3:
 400                 return SX9310_REG_PROX_CTRL8;
 401         case 1:
 402         case 2:
 403                 return SX9310_REG_PROX_CTRL9;
 404         default:
 405                 return -EINVAL;
 406         }
 407 }
 408
 409 static int sx9310_read_thresh(struct sx_common_data *data,
 410                               const struct iio_chan_spec *chan, int *val)
 411 {
 412         unsigned int reg;
 413         unsigned int regval;
 414         int ret;
 415
 416         reg = ret = sx9310_get_thresh_reg(chan->channel);
 417         if (ret < 0)
 418                 return ret;
 419
 420         ret = regmap_read(data->regmap, reg, &regval);
 421         if (ret)
 422                 return ret;
 423
 424         regval = FIELD_GET(SX9310_REG_PROX_CTRL8_9_PTHRESH_MASK, regval);
 425         if (regval >= ARRAY_SIZE(sx9310_pthresh_codes))
 426                 return -EINVAL;
 427
 428         *val = sx9310_pthresh_codes[regval];
 429         return IIO_VAL_INT;
 430 }
 431
 432 static int sx9310_read_hysteresis(struct sx_common_data *data,
 433                                   const struct iio_chan_spec *chan, int *val)
 434 {
 435         unsigned int regval, pthresh;
 436         int ret;
 437
 438         ret = sx9310_read_thresh(data, chan, &pthresh);
 439         if (ret < 0)
 440                 return ret;
 441
 442         ret = regmap_read(data->regmap, SX9310_REG_PROX_CTRL10, &regval);
 443         if (ret)
 444                 return ret;
 445
 446         regval = FIELD_GET(SX9310_REG_PROX_CTRL10_HYST_MASK, regval);
 447         if (!regval)
 448                 regval = 5;
 449
 450         /* regval is at most 5 */
 451         *val = pthresh >> (5 - regval);
 452
 453         return IIO_VAL_INT;
 454 }
 455
 456 static int sx9310_read_far_debounce(struct sx_common_data *data, int *val)
 457 {
 458         unsigned int regval;
 459         int ret;
 460
 461         ret = regmap_read(data->regmap, SX9310_REG_PROX_CTRL10, &regval);
 462         if (ret)
 463                 return ret;
 464
 465         regval = FIELD_GET(SX9310_REG_PROX_CTRL10_FAR_DEBOUNCE_MASK, regval);
 466         if (regval)
 467                 *val = 1 << regval;
 468         else
 469                 *val = 0;
 470
 471         return IIO_VAL_INT;
 472 }
 473
 474 static int sx9310_read_close_debounce(struct sx_common_data *data, int *val)
 475 {
 476         unsigned int regval;
 477         int ret;
 478
 479         ret = regmap_read(data->regmap, SX9310_REG_PROX_CTRL10, &regval);
 480         if (ret)
 481                 return ret;
 482
 483         regval = FIELD_GET(SX9310_REG_PROX_CTRL10_CLOSE_DEBOUNCE_MASK, regval);
 484         if (regval)
 485                 *val = 1 << regval;
 486         else
 487                 *val = 0;
 488
 489         return IIO_VAL_INT;
 490 }
 491
 492 static int sx9310_read_event_val(struct iio_dev *indio_dev,
 493                                  const struct iio_chan_spec *chan,
 494                                  enum iio_event_type type,
 495                                  enum iio_event_direction dir,
 496                                  enum iio_event_info info, int *val, int *val2)
 497 {
 498         struct sx_common_data *data = iio_priv(indio_dev);
 499
 500         if (chan->type != IIO_PROXIMITY)
 501                 return -EINVAL;
 502
 503         switch (info) {
 504         case IIO_EV_INFO_VALUE:
 505                 return sx9310_read_thresh(data, chan, val);
 506         case IIO_EV_INFO_PERIOD:
 507                 switch (dir) {
 508                 case IIO_EV_DIR_RISING:
 509                         return sx9310_read_far_debounce(data, val);
 510                 case IIO_EV_DIR_FALLING:
 511                         return sx9310_read_close_debounce(data, val);
 512                 default:
 513                         return -EINVAL;
 514                 }
 515         case IIO_EV_INFO_HYSTERESIS:
 516                 return sx9310_read_hysteresis(data, chan, val);
 517         default:
 518                 return -EINVAL;
 519         }
 520 }
 521
 522 static int sx9310_write_thresh(struct sx_common_data *data,
 523                                const struct iio_chan_spec *chan, int val)
 524 {
 525         unsigned int reg;
 526         unsigned int regval;
 527         int ret, i;
 528
 529         reg = ret = sx9310_get_thresh_reg(chan->channel);
 530         if (ret < 0)
 531                 return ret;
 532
 533         for (i = 0; i < ARRAY_SIZE(sx9310_pthresh_codes); i++) {
 534                 if (sx9310_pthresh_codes[i] == val) {
 535                         regval = i;
 536                         break;
 537                 }
 538         }
 539
 540         if (i == ARRAY_SIZE(sx9310_pthresh_codes))
 541                 return -EINVAL;
 542
 543         regval = FIELD_PREP(SX9310_REG_PROX_CTRL8_9_PTHRESH_MASK, regval);
 544         mutex_lock(&data->mutex);
 545         ret = regmap_update_bits(data->regmap, reg,
 546                                  SX9310_REG_PROX_CTRL8_9_PTHRESH_MASK, regval);
 547         mutex_unlock(&data->mutex);
 548
 549         return ret;
 550 }
 551
 552 static int sx9310_write_hysteresis(struct sx_common_data *data,
 553                                    const struct iio_chan_spec *chan, int _val)
 554 {
 555         unsigned int hyst, val = _val;
 556         int ret, pthresh;
 557
 558         ret = sx9310_read_thresh(data, chan, &pthresh);
 559         if (ret < 0)
 560                 return ret;
 561
 562         if (val == 0)
 563                 hyst = 0;
 564         else if (val == pthresh >> 2)
 565                 hyst = 3;
 566         else if (val == pthresh >> 3)
 567                 hyst = 2;
 568         else if (val == pthresh >> 4)
 569                 hyst = 1;
 570         else
 571                 return -EINVAL;
 572
 573         hyst = FIELD_PREP(SX9310_REG_PROX_CTRL10_HYST_MASK, hyst);
 574         mutex_lock(&data->mutex);
 575         ret = regmap_update_bits(data->regmap, SX9310_REG_PROX_CTRL10,
 576                                  SX9310_REG_PROX_CTRL10_HYST_MASK, hyst);
 577         mutex_unlock(&data->mutex);
 578
 579         return ret;
 580 }
 581
 582 static int sx9310_write_far_debounce(struct sx_common_data *data, int val)
 583 {
 584         int ret;
 585         unsigned int regval;
 586
 587         if (val > 0)
 588                 val = ilog2(val);
 589         if (!FIELD_FIT(SX9310_REG_PROX_CTRL10_FAR_DEBOUNCE_MASK, val))
 590                 return -EINVAL;
 591
 592         regval = FIELD_PREP(SX9310_REG_PROX_CTRL10_FAR_DEBOUNCE_MASK, val);
 593
 594         mutex_lock(&data->mutex);
 595         ret = regmap_update_bits(data->regmap, SX9310_REG_PROX_CTRL10,
 596                                  SX9310_REG_PROX_CTRL10_FAR_DEBOUNCE_MASK,
 597                                  regval);
 598         mutex_unlock(&data->mutex);
 599
 600         return ret;
 601 }
 602
 603 static int sx9310_write_close_debounce(struct sx_common_data *data, int val)
 604 {
 605         int ret;
 606         unsigned int regval;
 607
 608         if (val > 0)
 609                 val = ilog2(val);
 610         if (!FIELD_FIT(SX9310_REG_PROX_CTRL10_CLOSE_DEBOUNCE_MASK, val))
 611                 return -EINVAL;
 612
 613         regval = FIELD_PREP(SX9310_REG_PROX_CTRL10_CLOSE_DEBOUNCE_MASK, val);
 614
 615         mutex_lock(&data->mutex);
 616         ret = regmap_update_bits(data->regmap, SX9310_REG_PROX_CTRL10,
 617                                  SX9310_REG_PROX_CTRL10_CLOSE_DEBOUNCE_MASK,
 618                                  regval);
 619         mutex_unlock(&data->mutex);
 620
 621         return ret;
 622 }
 623
 624 static int sx9310_write_event_val(struct iio_dev *indio_dev,
 625                                   const struct iio_chan_spec *chan,
 626                                   enum iio_event_type type,
 627                                   enum iio_event_direction dir,
 628                                   enum iio_event_info info, int val, int val2)
 629 {
 630         struct sx_common_data *data = iio_priv(indio_dev);
 631
 632         if (chan->type != IIO_PROXIMITY)
 633                 return -EINVAL;
 634
 635         switch (info) {
 636         case IIO_EV_INFO_VALUE:
 637                 return sx9310_write_thresh(data, chan, val);
 638         case IIO_EV_INFO_PERIOD:
 639                 switch (dir) {
 640                 case IIO_EV_DIR_RISING:
 641                         return sx9310_write_far_debounce(data, val);
 642                 case IIO_EV_DIR_FALLING:
 643                         return sx9310_write_close_debounce(data, val);
 644                 default:
 645                         return -EINVAL;
 646                 }
 647         case IIO_EV_INFO_HYSTERESIS:
 648                 return sx9310_write_hysteresis(data, chan, val);
 649         default:
 650                 return -EINVAL;
 651         }
 652 }
 653
 654 static int sx9310_set_samp_freq(struct sx_common_data *data, int val, int val2)
 655 {
 656         int i, ret;
 657
 658         for (i = 0; i < ARRAY_SIZE(sx9310_samp_freq_table); i++)
 659                 if (val == sx9310_samp_freq_table[i].val &&
 660                     val2 == sx9310_samp_freq_table[i].val2)
 661                         break;
 662
 663         if (i == ARRAY_SIZE(sx9310_samp_freq_table))
 664                 return -EINVAL;
 665
 666         mutex_lock(&data->mutex);
 667
 668         ret = regmap_update_bits(
 669                 data->regmap, SX9310_REG_PROX_CTRL0,
 670                 SX9310_REG_PROX_CTRL0_SCANPERIOD_MASK,
 671                 FIELD_PREP(SX9310_REG_PROX_CTRL0_SCANPERIOD_MASK, i));
 672
 673         mutex_unlock(&data->mutex);
 674
 675         return ret;
 676 }
 677
 678 static int sx9310_write_gain(struct sx_common_data *data,
 679                              const struct iio_chan_spec *chan, int val)
 680 {
 681         unsigned int gain, mask;
 682         int ret;
 683
 684         gain = ilog2(val);
 685
 686         switch (chan->channel) {
 687         case 0:
 688         case 3:
 689                 mask = SX9310_REG_PROX_CTRL3_GAIN0_MASK;
 690                 gain = FIELD_PREP(SX9310_REG_PROX_CTRL3_GAIN0_MASK, gain);
 691                 break;
 692         case 1:
 693         case 2:
 694                 mask = SX9310_REG_PROX_CTRL3_GAIN12_MASK;
 695                 gain = FIELD_PREP(SX9310_REG_PROX_CTRL3_GAIN12_MASK, gain);
 696                 break;
 697         default:
 698                 return -EINVAL;
 699         }
 700
 701         mutex_lock(&data->mutex);
 702         ret = regmap_update_bits(data->regmap, SX9310_REG_PROX_CTRL3, mask,
 703                                  gain);
 704         mutex_unlock(&data->mutex);
 705
 706         return ret;
 707 }
 708
 709 static int sx9310_write_raw(struct iio_dev *indio_dev,
 710                             const struct iio_chan_spec *chan, int val, int val2,
 711                             long mask)
 712 {
 713         struct sx_common_data *data = iio_priv(indio_dev);
 714
 715         if (chan->type != IIO_PROXIMITY)
 716                 return -EINVAL;
 717
 718         switch (mask) {
 719         case IIO_CHAN_INFO_SAMP_FREQ:
 720                 return sx9310_set_samp_freq(data, val, val2);
 721         case IIO_CHAN_INFO_HARDWAREGAIN:
 722                 return sx9310_write_gain(data, chan, val);
 723         default:
 724                 return -EINVAL;
 725         }
 726 }
 727
 728 static const struct sx_common_reg_default sx9310_default_regs[] = {
 729         { SX9310_REG_IRQ_MSK, 0x00 },
 730         { SX9310_REG_IRQ_FUNC, 0x00 },
 731         /*
 732          * The lower 4 bits should not be set as it enable sensors measurements.
 733          * Turning the detection on before the configuration values are set to
 734          * good values can cause the device to return erroneous readings.
 735          */
 736         { SX9310_REG_PROX_CTRL0, SX9310_REG_PROX_CTRL0_SCANPERIOD_15MS },
 737         { SX9310_REG_PROX_CTRL1, 0x00 },
 738         { SX9310_REG_PROX_CTRL2, SX9310_REG_PROX_CTRL2_COMBMODE_CS1_CS2 |
 739                                  SX9310_REG_PROX_CTRL2_SHIELDEN_DYNAMIC },
 740         { SX9310_REG_PROX_CTRL3, SX9310_REG_PROX_CTRL3_GAIN0_X8 |
 741                                  SX9310_REG_PROX_CTRL3_GAIN12_X4 },
 742         { SX9310_REG_PROX_CTRL4, SX9310_REG_PROX_CTRL4_RESOLUTION_FINEST },
 743         { SX9310_REG_PROX_CTRL5, SX9310_REG_PROX_CTRL5_RANGE_SMALL |
 744                                  SX9310_REG_PROX_CTRL5_STARTUPSENS_CS1 |
 745                                  SX9310_REG_PROX_CTRL5_RAWFILT_1P25 },
 746         { SX9310_REG_PROX_CTRL6, SX9310_REG_PROX_CTRL6_AVGTHRESH_DEFAULT },
 747         { SX9310_REG_PROX_CTRL7, SX9310_REG_PROX_CTRL7_AVGNEGFILT_2 |
 748                                  SX9310_REG_PROX_CTRL7_AVGPOSFILT_512 },
 749         { SX9310_REG_PROX_CTRL8, SX9310_REG_PROX_CTRL8_9_PTHRESH_96 |
 750                                  SX9310_REG_PROX_CTRL8_9_BODYTHRESH_1500 },
 751         { SX9310_REG_PROX_CTRL9, SX9310_REG_PROX_CTRL8_9_PTHRESH_28 |
 752                                  SX9310_REG_PROX_CTRL8_9_BODYTHRESH_900 },
 753         { SX9310_REG_PROX_CTRL10, SX9310_REG_PROX_CTRL10_HYST_6PCT |
 754                                   SX9310_REG_PROX_CTRL10_FAR_DEBOUNCE_2 },
 755         { SX9310_REG_PROX_CTRL11, 0x00 },
 756         { SX9310_REG_PROX_CTRL12, 0x00 },
 757         { SX9310_REG_PROX_CTRL13, 0x00 },
 758         { SX9310_REG_PROX_CTRL14, 0x00 },
 759         { SX9310_REG_PROX_CTRL15, 0x00 },
 760         { SX9310_REG_PROX_CTRL16, 0x00 },
 761         { SX9310_REG_PROX_CTRL17, 0x00 },
 762         { SX9310_REG_PROX_CTRL18, 0x00 },
 763         { SX9310_REG_PROX_CTRL19, 0x00 },
 764         { SX9310_REG_SAR_CTRL0, SX9310_REG_SAR_CTRL0_SARDEB_4_SAMPLES |
 765                                 SX9310_REG_SAR_CTRL0_SARHYST_8 },
 766         { SX9310_REG_SAR_CTRL1, SX9310_REG_SAR_CTRL1_SLOPE(10781250) },
 767         { SX9310_REG_SAR_CTRL2, SX9310_REG_SAR_CTRL2_SAROFFSET_DEFAULT },
 768 };
 769
 770 /* Activate all channels and perform an initial compensation. */
 771 static int sx9310_init_compensation(struct iio_dev *indio_dev)
 772 {
 773         struct sx_common_data *data = iio_priv(indio_dev);
 774         int ret;
 775         unsigned int val;
 776         unsigned int ctrl0;
 777
 778         ret = regmap_read(data->regmap, SX9310_REG_PROX_CTRL0, &ctrl0);
 779         if (ret)
 780                 return ret;
 781
 782         /* run the compensation phase on all channels */
 783         ret = regmap_write(data->regmap, SX9310_REG_PROX_CTRL0,
 784                            ctrl0 | SX9310_REG_PROX_CTRL0_SENSOREN_MASK);
 785         if (ret)
 786                 return ret;
 787
 788         ret = regmap_read_poll_timeout(data->regmap, SX9310_REG_STAT1, val,
 789                                        !(val & SX9310_REG_STAT1_COMPSTAT_MASK),
 790                                        20000, 2000000);
 791         if (ret)
 792                 return ret;
 793
 794         regmap_write(data->regmap, SX9310_REG_PROX_CTRL0, ctrl0);
 795         return ret;
 796 }
 797
 798 static const struct sx_common_reg_default *
 799 sx9310_get_default_reg(struct device *dev, int idx,
 800                        struct sx_common_reg_default *reg_def)
 801 {
 802         u32 combined[SX9310_NUM_CHANNELS];
 803         u32 start = 0, raw = 0, pos = 0;
 804         unsigned long comb_mask = 0;
 805         int ret, i, count;
 806         const char *res;
 807
 808         memcpy(reg_def, &sx9310_default_regs[idx], sizeof(*reg_def));
 809         switch (reg_def->reg) {
 810         case SX9310_REG_PROX_CTRL2:
 811                 if (device_property_read_bool(dev, "semtech,cs0-ground")) {
 812                         reg_def->def &= ~SX9310_REG_PROX_CTRL2_SHIELDEN_MASK;
 813                         reg_def->def |= SX9310_REG_PROX_CTRL2_SHIELDEN_GROUND;
 814                 }
 815
 816                 count = device_property_count_u32(dev, "semtech,combined-sensors");
 817                 if (count < 0 || count > ARRAY_SIZE(combined))
 818                         break;
 819                 ret = device_property_read_u32_array(dev, "semtech,combined-sensors",
 820                                 combined, count);
 821                 if (ret)
 822                         break;
 823
 824                 for (i = 0; i < count; i++)
 825                         comb_mask |= BIT(combined[i]);
 826
 827                 reg_def->def &= ~SX9310_REG_PROX_CTRL2_COMBMODE_MASK;
 828                 if (comb_mask == (BIT(3) | BIT(2) | BIT(1) | BIT(0)))
 829                         reg_def->def |= SX9310_REG_PROX_CTRL2_COMBMODE_CS0_CS1_CS2_CS3;
 830                 else if (comb_mask == (BIT(1) | BIT(2)))
 831                         reg_def->def |= SX9310_REG_PROX_CTRL2_COMBMODE_CS1_CS2;
 832                 else if (comb_mask == (BIT(0) | BIT(1)))
 833                         reg_def->def |= SX9310_REG_PROX_CTRL2_COMBMODE_CS0_CS1;
 834                 else if (comb_mask == BIT(3))
 835                         reg_def->def |= SX9310_REG_PROX_CTRL2_COMBMODE_CS3;
 836
 837                 break;
 838         case SX9310_REG_PROX_CTRL4:
 839                 ret = device_property_read_string(dev, "semtech,resolution", &res);
 840                 if (ret)
 841                         break;
 842
 843                 reg_def->def &= ~SX9310_REG_PROX_CTRL4_RESOLUTION_MASK;
 844                 if (!strcmp(res, "coarsest"))
 845                         reg_def->def |= SX9310_REG_PROX_CTRL4_RESOLUTION_COARSEST;
 846                 else if (!strcmp(res, "very-coarse"))
 847                         reg_def->def |= SX9310_REG_PROX_CTRL4_RESOLUTION_VERY_COARSE;
 848                 else if (!strcmp(res, "coarse"))
 849                         reg_def->def |= SX9310_REG_PROX_CTRL4_RESOLUTION_COARSE;
 850                 else if (!strcmp(res, "medium-coarse"))
 851                         reg_def->def |= SX9310_REG_PROX_CTRL4_RESOLUTION_MEDIUM_COARSE;
 852                 else if (!strcmp(res, "medium"))
 853                         reg_def->def |= SX9310_REG_PROX_CTRL4_RESOLUTION_MEDIUM;
 854                 else if (!strcmp(res, "fine"))
 855                         reg_def->def |= SX9310_REG_PROX_CTRL4_RESOLUTION_FINE;
 856                 else if (!strcmp(res, "very-fine"))
 857                         reg_def->def |= SX9310_REG_PROX_CTRL4_RESOLUTION_VERY_FINE;
 858                 else if (!strcmp(res, "finest"))
 859                         reg_def->def |= SX9310_REG_PROX_CTRL4_RESOLUTION_FINEST;
 860
 861                 break;
 862         case SX9310_REG_PROX_CTRL5:
 863                 ret = device_property_read_u32(dev, "semtech,startup-sensor", &start);
 864                 if (ret) {
 865                         start = FIELD_GET(SX9310_REG_PROX_CTRL5_STARTUPSENS_MASK,
 866                                           reg_def->def);
 867                 }
 868
 869                 reg_def->def &= ~SX9310_REG_PROX_CTRL5_STARTUPSENS_MASK;
 870                 reg_def->def |= FIELD_PREP(SX9310_REG_PROX_CTRL5_STARTUPSENS_MASK,
 871                                            start);
 872
 873                 ret = device_property_read_u32(dev, "semtech,proxraw-strength", &raw);
 874                 if (ret) {
 875                         raw = FIELD_GET(SX9310_REG_PROX_CTRL5_RAWFILT_MASK,
 876                                         reg_def->def);
 877                 } else {
 878                         raw = ilog2(raw);
 879                 }
 880
 881                 reg_def->def &= ~SX9310_REG_PROX_CTRL5_RAWFILT_MASK;
 882                 reg_def->def |= FIELD_PREP(SX9310_REG_PROX_CTRL5_RAWFILT_MASK,
 883                                            raw);
 884                 break;
 885         case SX9310_REG_PROX_CTRL7:
 886                 ret = device_property_read_u32(dev, "semtech,avg-pos-strength", &pos);
 887                 if (ret)
 888                         break;
 889
 890                 /* Powers of 2, except for a gap between 16 and 64 */
 891                 pos = clamp(ilog2(pos), 3, 11) - (pos >= 32 ? 4 : 3);
 892                 reg_def->def &= ~SX9310_REG_PROX_CTRL7_AVGPOSFILT_MASK;
 893                 reg_def->def |= FIELD_PREP(SX9310_REG_PROX_CTRL7_AVGPOSFILT_MASK,
 894                                            pos);
 895                 break;
 896         }
 897
 898         return reg_def;
 899 }
 900
 901 static int sx9310_check_whoami(struct device *dev,
 902                                struct iio_dev *indio_dev)
 903 {
 904         struct sx_common_data *data = iio_priv(indio_dev);
 905         unsigned int long ddata;
 906         unsigned int whoami;
 907         int ret;
 908
 909         ret = regmap_read(data->regmap, SX9310_REG_WHOAMI, &whoami);
 910         if (ret)
 911                 return ret;
 912
 913         ddata = (uintptr_t)device_get_match_data(dev);
 914         if (ddata != whoami)
 915                 return -EINVAL;
 916
 917         switch (whoami) {
 918         case SX9310_WHOAMI_VALUE:
 919                 indio_dev->name = "sx9310";
 920                 break;
 921         case SX9311_WHOAMI_VALUE:
 922                 indio_dev->name = "sx9311";
 923                 break;
 924         default:
 925                 return -ENODEV;
 926         }
 927
 928         return 0;
 929 }
 930
 931 static const struct sx_common_chip_info sx9310_chip_info = {
 932         .reg_stat = SX9310_REG_STAT0,
 933         .reg_irq_msk = SX9310_REG_IRQ_MSK,
 934         .reg_enable_chan = SX9310_REG_PROX_CTRL0,
 935         .reg_reset = SX9310_REG_RESET,
 936
 937         .mask_enable_chan = SX9310_REG_STAT1_COMPSTAT_MASK,
 938         .irq_msk_offset = 3,
 939         .num_channels = SX9310_NUM_CHANNELS,
 940         .num_default_regs = ARRAY_SIZE(sx9310_default_regs),
 941
 942         .ops = {
 943                 .read_prox_data = sx9310_read_prox_data,
 944                 .check_whoami = sx9310_check_whoami,
 945                 .init_compensation = sx9310_init_compensation,
 946                 .wait_for_sample = sx9310_wait_for_sample,
 947                 .get_default_reg = sx9310_get_default_reg,
 948         },
 949
 950         .iio_channels = sx9310_channels,
 951         .num_iio_channels = ARRAY_SIZE(sx9310_channels),
 952         .iio_info =  {
 953                 .read_raw = sx9310_read_raw,
 954                 .read_avail = sx9310_read_avail,
 955                 .read_event_value = sx9310_read_event_val,
 956                 .write_event_value = sx9310_write_event_val,
 957                 .write_raw = sx9310_write_raw,
 958                 .read_event_config = sx_common_read_event_config,
 959                 .write_event_config = sx_common_write_event_config,
 960         },
 961 };
 962
 963 static int sx9310_probe(struct i2c_client *client)
 964 {
 965         return sx_common_probe(client, &sx9310_chip_info, &sx9310_regmap_config);
 966 }
 967
 968 static int __maybe_unused sx9310_suspend(struct device *dev)
 969 {
 970         struct sx_common_data *data = iio_priv(dev_get_drvdata(dev));
 971         u8 ctrl0;
 972         int ret;
 973
 974         disable_irq_nosync(data->client->irq);
 975
 976         mutex_lock(&data->mutex);
 977         ret = regmap_read(data->regmap, SX9310_REG_PROX_CTRL0,
 978                           &data->suspend_ctrl);
 979         if (ret)
 980                 goto out;
 981
 982         ctrl0 = data->suspend_ctrl & ~SX9310_REG_PROX_CTRL0_SENSOREN_MASK;
 983         ret = regmap_write(data->regmap, SX9310_REG_PROX_CTRL0, ctrl0);
 984         if (ret)
 985                 goto out;
 986
 987         ret = regmap_write(data->regmap, SX9310_REG_PAUSE, 0);
 988
 989 out:
 990         mutex_unlock(&data->mutex);
 991         return ret;
 992 }
 993
 994 static int __maybe_unused sx9310_resume(struct device *dev)
 995 {
 996         struct sx_common_data *data = iio_priv(dev_get_drvdata(dev));
 997         int ret;
 998
 999         mutex_lock(&data->mutex);
1000         ret = regmap_write(data->regmap, SX9310_REG_PAUSE, 1);
1001         if (ret)
1002                 goto out;
1003
1004         ret = regmap_write(data->regmap, SX9310_REG_PROX_CTRL0,
1005                            data->suspend_ctrl);
1006
1007 out:
1008         mutex_unlock(&data->mutex);
1009         if (ret)
1010                 return ret;
1011
1012         enable_irq(data->client->irq);
1013         return 0;
1014 }
1015
1016 static SIMPLE_DEV_PM_OPS(sx9310_pm_ops, sx9310_suspend, sx9310_resume);
1017
1018 static const struct acpi_device_id sx9310_acpi_match[] = {
1019         { "STH9310", SX9310_WHOAMI_VALUE },
1020         { "STH9311", SX9311_WHOAMI_VALUE },
1021         {}
1022 };
1023 MODULE_DEVICE_TABLE(acpi, sx9310_acpi_match);
1024
1025 static const struct of_device_id sx9310_of_match[] = {
1026         { .compatible = "semtech,sx9310", (void *)SX9310_WHOAMI_VALUE },
1027         { .compatible = "semtech,sx9311", (void *)SX9311_WHOAMI_VALUE },
1028         {}
1029 };
1030 MODULE_DEVICE_TABLE(of, sx9310_of_match);
1031
1032 static const struct i2c_device_id sx9310_id[] = {
1033         { "sx9310", SX9310_WHOAMI_VALUE },
1034         { "sx9311", SX9311_WHOAMI_VALUE },
1035         {}
1036 };
1037 MODULE_DEVICE_TABLE(i2c, sx9310_id);
1038
1039 static struct i2c_driver sx9310_driver = {
1040         .driver = {
1041                 .name   = "sx9310",
1042                 .acpi_match_table = sx9310_acpi_match,
1043                 .of_match_table = sx9310_of_match,
1044                 .pm = &sx9310_pm_ops,
1045
1046                 /*
1047                  * Lots of i2c transfers in probe + over 200 ms waiting in
1048                  * sx9310_init_compensation() mean a slow probe; prefer async
1049                  * so we don't delay boot if we're builtin to the kernel.
1050                  */
1051                 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
1052         },
1053         .probe_new      = sx9310_probe,
1054         .id_table       = sx9310_id,
1055 };
1056 module_i2c_driver(sx9310_driver);
1057
1058 MODULE_AUTHOR("Gwendal Grignou <gwendal@chromium.org>");
1059 MODULE_AUTHOR("Daniel Campello <campello@chromium.org>");
1060 MODULE_DESCRIPTION("Driver for Semtech SX9310/SX9311 proximity sensor");
1061 MODULE_LICENSE("GPL v2");
1062 MODULE_IMPORT_NS(SEMTECH_PROX);