drivers/iio/accel/bmi088-accel-core.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * 3-axis accelerometer driver supporting following Bosch-Sensortec chips:
   4  *  - BMI088
   5  *  - BMI085
   6  *  - BMI090L
   7  *
   8  * Copyright (c) 2018-2021, Topic Embedded Products
   9  */
  10
  11 #include <linux/bitfield.h>
  12 #include <linux/delay.h>
  13 #include <linux/iio/iio.h>
  14 #include <linux/iio/sysfs.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/module.h>
  17 #include <linux/pm.h>
  18 #include <linux/pm_runtime.h>
  19 #include <linux/regmap.h>
  20 #include <linux/slab.h>
  21 #include <linux/unaligned.h>
  22
  23 #include "bmi088-accel.h"
  24
  25 #define BMI088_ACCEL_REG_CHIP_ID                        0x00
  26 #define BMI088_ACCEL_REG_ERROR                          0x02
  27
  28 #define BMI088_ACCEL_REG_INT_STATUS                     0x1D
  29 #define BMI088_ACCEL_INT_STATUS_BIT_DRDY                BIT(7)
  30
  31 #define BMI088_ACCEL_REG_RESET                          0x7E
  32 #define BMI088_ACCEL_RESET_VAL                          0xB6
  33
  34 #define BMI088_ACCEL_REG_PWR_CTRL                       0x7D
  35 #define BMI088_ACCEL_REG_PWR_CONF                       0x7C
  36
  37 #define BMI088_ACCEL_REG_INT_MAP_DATA                   0x58
  38 #define BMI088_ACCEL_INT_MAP_DATA_BIT_INT1_DRDY         BIT(2)
  39 #define BMI088_ACCEL_INT_MAP_DATA_BIT_INT2_FWM          BIT(5)
  40
  41 #define BMI088_ACCEL_REG_INT1_IO_CONF                   0x53
  42 #define BMI088_ACCEL_INT1_IO_CONF_BIT_ENABLE_OUT        BIT(3)
  43 #define BMI088_ACCEL_INT1_IO_CONF_BIT_LVL               BIT(1)
  44
  45 #define BMI088_ACCEL_REG_INT2_IO_CONF                   0x54
  46 #define BMI088_ACCEL_INT2_IO_CONF_BIT_ENABLE_OUT        BIT(3)
  47 #define BMI088_ACCEL_INT2_IO_CONF_BIT_LVL               BIT(1)
  48
  49 #define BMI088_ACCEL_REG_ACC_CONF                       0x40
  50 #define BMI088_ACCEL_MODE_ODR_MASK                      0x0f
  51
  52 #define BMI088_ACCEL_REG_ACC_RANGE                      0x41
  53 #define BMI088_ACCEL_RANGE_3G                           0x00
  54 #define BMI088_ACCEL_RANGE_6G                           0x01
  55 #define BMI088_ACCEL_RANGE_12G                          0x02
  56 #define BMI088_ACCEL_RANGE_24G                          0x03
  57
  58 #define BMI088_ACCEL_REG_TEMP                           0x22
  59 #define BMI088_ACCEL_REG_TEMP_SHIFT                     5
  60 #define BMI088_ACCEL_TEMP_UNIT                          125
  61 #define BMI088_ACCEL_TEMP_OFFSET                        23000
  62
  63 #define BMI088_ACCEL_REG_XOUT_L                         0x12
  64 #define BMI088_ACCEL_AXIS_TO_REG(axis) \
  65         (BMI088_ACCEL_REG_XOUT_L + (axis * 2))
  66
  67 #define BMI088_ACCEL_MAX_STARTUP_TIME_US                1000
  68 #define BMI088_AUTO_SUSPEND_DELAY_MS                    2000
  69
  70 #define BMI088_ACCEL_REG_FIFO_STATUS                    0x0E
  71 #define BMI088_ACCEL_REG_FIFO_CONFIG0                   0x48
  72 #define BMI088_ACCEL_REG_FIFO_CONFIG1                   0x49
  73 #define BMI088_ACCEL_REG_FIFO_DATA                      0x3F
  74 #define BMI088_ACCEL_FIFO_LENGTH                        100
  75
  76 #define BMI088_ACCEL_FIFO_MODE_FIFO                     0x40
  77 #define BMI088_ACCEL_FIFO_MODE_STREAM                   0x80
  78
  79 #define BMIO088_ACCEL_ACC_RANGE_MSK                     GENMASK(1, 0)
  80
  81 enum bmi088_accel_axis {
  82         AXIS_X,
  83         AXIS_Y,
  84         AXIS_Z,
  85 };
  86
  87 static const int bmi088_sample_freqs[] = {
  88         12, 500000,
  89         25, 0,
  90         50, 0,
  91         100, 0,
  92         200, 0,
  93         400, 0,
  94         800, 0,
  95         1600, 0,
  96 };
  97
  98 /* Available OSR (over sampling rate) sets the 3dB cut-off frequency */
  99 enum bmi088_osr_modes {
 100         BMI088_ACCEL_MODE_OSR_NORMAL = 0xA,
 101         BMI088_ACCEL_MODE_OSR_2 = 0x9,
 102         BMI088_ACCEL_MODE_OSR_4 = 0x8,
 103 };
 104
 105 /* Available ODR (output data rates) in Hz */
 106 enum bmi088_odr_modes {
 107         BMI088_ACCEL_MODE_ODR_12_5 = 0x5,
 108         BMI088_ACCEL_MODE_ODR_25 = 0x6,
 109         BMI088_ACCEL_MODE_ODR_50 = 0x7,
 110         BMI088_ACCEL_MODE_ODR_100 = 0x8,
 111         BMI088_ACCEL_MODE_ODR_200 = 0x9,
 112         BMI088_ACCEL_MODE_ODR_400 = 0xa,
 113         BMI088_ACCEL_MODE_ODR_800 = 0xb,
 114         BMI088_ACCEL_MODE_ODR_1600 = 0xc,
 115 };
 116
 117 struct bmi088_accel_chip_info {
 118         const char *name;
 119         u8 chip_id;
 120         const struct iio_chan_spec *channels;
 121         int num_channels;
 122         const int scale_table[4][2];
 123 };
 124
 125 struct bmi088_accel_data {
 126         struct regmap *regmap;
 127         const struct bmi088_accel_chip_info *chip_info;
 128         u8 buffer[2] __aligned(IIO_DMA_MINALIGN); /* shared DMA safe buffer */
 129 };
 130
 131 static const struct regmap_range bmi088_volatile_ranges[] = {
 132         /* All registers below 0x40 are volatile, except the CHIP ID. */
 133         regmap_reg_range(BMI088_ACCEL_REG_ERROR, 0x3f),
 134         /* Mark the RESET as volatile too, it is self-clearing */
 135         regmap_reg_range(BMI088_ACCEL_REG_RESET, BMI088_ACCEL_REG_RESET),
 136 };
 137
 138 static const struct regmap_access_table bmi088_volatile_table = {
 139         .yes_ranges     = bmi088_volatile_ranges,
 140         .n_yes_ranges   = ARRAY_SIZE(bmi088_volatile_ranges),
 141 };
 142
 143 const struct regmap_config bmi088_regmap_conf = {
 144         .reg_bits = 8,
 145         .val_bits = 8,
 146         .max_register = 0x7E,
 147         .volatile_table = &bmi088_volatile_table,
 148         .cache_type = REGCACHE_RBTREE,
 149 };
 150 EXPORT_SYMBOL_NS_GPL(bmi088_regmap_conf, "IIO_BMI088");
 151
 152 static int bmi088_accel_power_up(struct bmi088_accel_data *data)
 153 {
 154         int ret;
 155
 156         /* Enable accelerometer and temperature sensor */
 157         ret = regmap_write(data->regmap, BMI088_ACCEL_REG_PWR_CTRL, 0x4);
 158         if (ret)
 159                 return ret;
 160
 161         /* Datasheet recommends to wait at least 5ms before communication */
 162         usleep_range(5000, 6000);
 163
 164         /* Disable suspend mode */
 165         ret = regmap_write(data->regmap, BMI088_ACCEL_REG_PWR_CONF, 0x0);
 166         if (ret)
 167                 return ret;
 168
 169         /* Recommended at least 1ms before further communication */
 170         usleep_range(1000, 1200);
 171
 172         return 0;
 173 }
 174
 175 static int bmi088_accel_power_down(struct bmi088_accel_data *data)
 176 {
 177         int ret;
 178
 179         /* Enable suspend mode */
 180         ret = regmap_write(data->regmap, BMI088_ACCEL_REG_PWR_CONF, 0x3);
 181         if (ret)
 182                 return ret;
 183
 184         /* Recommended at least 1ms before further communication */
 185         usleep_range(1000, 1200);
 186
 187         /* Disable accelerometer and temperature sensor */
 188         ret = regmap_write(data->regmap, BMI088_ACCEL_REG_PWR_CTRL, 0x0);
 189         if (ret)
 190                 return ret;
 191
 192         /* Datasheet recommends to wait at least 5ms before communication */
 193         usleep_range(5000, 6000);
 194
 195         return 0;
 196 }
 197
 198 static int bmi088_accel_get_sample_freq(struct bmi088_accel_data *data,
 199                                         int *val, int *val2)
 200 {
 201         unsigned int value;
 202         int ret;
 203
 204         ret = regmap_read(data->regmap, BMI088_ACCEL_REG_ACC_CONF,
 205                           &value);
 206         if (ret)
 207                 return ret;
 208
 209         value &= BMI088_ACCEL_MODE_ODR_MASK;
 210         value -= BMI088_ACCEL_MODE_ODR_12_5;
 211         value <<= 1;
 212
 213         if (value >= ARRAY_SIZE(bmi088_sample_freqs) - 1)
 214                 return -EINVAL;
 215
 216         *val = bmi088_sample_freqs[value];
 217         *val2 = bmi088_sample_freqs[value + 1];
 218
 219         return IIO_VAL_INT_PLUS_MICRO;
 220 }
 221
 222 static int bmi088_accel_set_sample_freq(struct bmi088_accel_data *data, int val)
 223 {
 224         unsigned int regval;
 225         int index = 0;
 226
 227         while (index < ARRAY_SIZE(bmi088_sample_freqs) &&
 228                bmi088_sample_freqs[index] != val)
 229                 index += 2;
 230
 231         if (index >= ARRAY_SIZE(bmi088_sample_freqs))
 232                 return -EINVAL;
 233
 234         regval = (index >> 1) + BMI088_ACCEL_MODE_ODR_12_5;
 235
 236         return regmap_update_bits(data->regmap, BMI088_ACCEL_REG_ACC_CONF,
 237                                   BMI088_ACCEL_MODE_ODR_MASK, regval);
 238 }
 239
 240 static int bmi088_accel_set_scale(struct bmi088_accel_data *data, int val, int val2)
 241 {
 242         unsigned int i;
 243
 244         for (i = 0; i < 4; i++)
 245                 if (val  == data->chip_info->scale_table[i][0] &&
 246                     val2 == data->chip_info->scale_table[i][1])
 247                         break;
 248
 249         if (i == 4)
 250                 return -EINVAL;
 251
 252         return regmap_write(data->regmap, BMI088_ACCEL_REG_ACC_RANGE, i);
 253 }
 254
 255 static int bmi088_accel_get_temp(struct bmi088_accel_data *data, int *val)
 256 {
 257         int ret;
 258         s16 temp;
 259
 260         ret = regmap_bulk_read(data->regmap, BMI088_ACCEL_REG_TEMP,
 261                                &data->buffer, sizeof(__be16));
 262         if (ret)
 263                 return ret;
 264
 265         /* data->buffer is cacheline aligned */
 266         temp = be16_to_cpu(*(__be16 *)data->buffer);
 267
 268         *val = temp >> BMI088_ACCEL_REG_TEMP_SHIFT;
 269
 270         return IIO_VAL_INT;
 271 }
 272
 273 static int bmi088_accel_get_axis(struct bmi088_accel_data *data,
 274                                  struct iio_chan_spec const *chan,
 275                                  int *val)
 276 {
 277         int ret;
 278         s16 raw_val;
 279
 280         ret = regmap_bulk_read(data->regmap,
 281                                BMI088_ACCEL_AXIS_TO_REG(chan->scan_index),
 282                                data->buffer, sizeof(__le16));
 283         if (ret)
 284                 return ret;
 285
 286         raw_val = le16_to_cpu(*(__le16 *)data->buffer);
 287         *val = raw_val;
 288
 289         return IIO_VAL_INT;
 290 }
 291
 292 static int bmi088_accel_read_raw(struct iio_dev *indio_dev,
 293                                  struct iio_chan_spec const *chan,
 294                                  int *val, int *val2, long mask)
 295 {
 296         struct bmi088_accel_data *data = iio_priv(indio_dev);
 297         struct device *dev = regmap_get_device(data->regmap);
 298         int ret;
 299         int reg;
 300
 301         switch (mask) {
 302         case IIO_CHAN_INFO_RAW:
 303                 switch (chan->type) {
 304                 case IIO_TEMP:
 305                         ret = pm_runtime_resume_and_get(dev);
 306                         if (ret)
 307                                 return ret;
 308
 309                         ret = bmi088_accel_get_temp(data, val);
 310                         goto out_read_raw_pm_put;
 311                 case IIO_ACCEL:
 312                         ret = pm_runtime_resume_and_get(dev);
 313                         if (ret)
 314                                 return ret;
 315
 316                         ret = iio_device_claim_direct_mode(indio_dev);
 317                         if (ret)
 318                                 goto out_read_raw_pm_put;
 319
 320                         ret = bmi088_accel_get_axis(data, chan, val);
 321                         iio_device_release_direct_mode(indio_dev);
 322                         if (!ret)
 323                                 ret = IIO_VAL_INT;
 324
 325                         goto out_read_raw_pm_put;
 326                 default:
 327                         return -EINVAL;
 328                 }
 329         case IIO_CHAN_INFO_OFFSET:
 330                 switch (chan->type) {
 331                 case IIO_TEMP:
 332                         /* Offset applies before scale */
 333                         *val = BMI088_ACCEL_TEMP_OFFSET/BMI088_ACCEL_TEMP_UNIT;
 334                         return IIO_VAL_INT;
 335                 default:
 336                         return -EINVAL;
 337                 }
 338         case IIO_CHAN_INFO_SCALE:
 339                 switch (chan->type) {
 340                 case IIO_TEMP:
 341                         /* 0.125 degrees per LSB */
 342                         *val = BMI088_ACCEL_TEMP_UNIT;
 343                         return IIO_VAL_INT;
 344                 case IIO_ACCEL:
 345                         ret = pm_runtime_resume_and_get(dev);
 346                         if (ret)
 347                                 return ret;
 348
 349                         ret = regmap_read(data->regmap,
 350                                           BMI088_ACCEL_REG_ACC_RANGE, &reg);
 351                         if (ret)
 352                                 goto out_read_raw_pm_put;
 353
 354                         reg = FIELD_GET(BMIO088_ACCEL_ACC_RANGE_MSK, reg);
 355                         *val  = data->chip_info->scale_table[reg][0];
 356                         *val2 = data->chip_info->scale_table[reg][1];
 357                         ret = IIO_VAL_INT_PLUS_MICRO;
 358
 359                         goto out_read_raw_pm_put;
 360                 default:
 361                         return -EINVAL;
 362                 }
 363         case IIO_CHAN_INFO_SAMP_FREQ:
 364                 ret = pm_runtime_resume_and_get(dev);
 365                 if (ret)
 366                         return ret;
 367
 368                 ret = bmi088_accel_get_sample_freq(data, val, val2);
 369                 goto out_read_raw_pm_put;
 370         default:
 371                 break;
 372         }
 373
 374         return -EINVAL;
 375
 376 out_read_raw_pm_put:
 377         pm_runtime_mark_last_busy(dev);
 378         pm_runtime_put_autosuspend(dev);
 379
 380         return ret;
 381 }
 382
 383 static int bmi088_accel_read_avail(struct iio_dev *indio_dev,
 384                              struct iio_chan_spec const *chan,
 385                              const int **vals, int *type, int *length,
 386                              long mask)
 387 {
 388         struct bmi088_accel_data *data = iio_priv(indio_dev);
 389
 390         switch (mask) {
 391         case IIO_CHAN_INFO_SCALE:
 392                 *vals = (const int *)data->chip_info->scale_table;
 393                 *length = 8;
 394                 *type = IIO_VAL_INT_PLUS_MICRO;
 395                 return IIO_AVAIL_LIST;
 396         case IIO_CHAN_INFO_SAMP_FREQ:
 397                 *type = IIO_VAL_INT_PLUS_MICRO;
 398                 *vals = bmi088_sample_freqs;
 399                 *length = ARRAY_SIZE(bmi088_sample_freqs);
 400                 return IIO_AVAIL_LIST;
 401         default:
 402                 return -EINVAL;
 403         }
 404 }
 405
 406 static int bmi088_accel_write_raw(struct iio_dev *indio_dev,
 407                                   struct iio_chan_spec const *chan,
 408                                   int val, int val2, long mask)
 409 {
 410         struct bmi088_accel_data *data = iio_priv(indio_dev);
 411         struct device *dev = regmap_get_device(data->regmap);
 412         int ret;
 413
 414         switch (mask) {
 415         case IIO_CHAN_INFO_SCALE:
 416                 ret = pm_runtime_resume_and_get(dev);
 417                 if (ret)
 418                         return ret;
 419
 420                 ret = bmi088_accel_set_scale(data, val, val2);
 421                 pm_runtime_mark_last_busy(dev);
 422                 pm_runtime_put_autosuspend(dev);
 423                 return ret;
 424         case IIO_CHAN_INFO_SAMP_FREQ:
 425                 ret = pm_runtime_resume_and_get(dev);
 426                 if (ret)
 427                         return ret;
 428
 429                 ret = bmi088_accel_set_sample_freq(data, val);
 430                 pm_runtime_mark_last_busy(dev);
 431                 pm_runtime_put_autosuspend(dev);
 432                 return ret;
 433         default:
 434                 return -EINVAL;
 435         }
 436 }
 437
 438 #define BMI088_ACCEL_CHANNEL(_axis) { \
 439         .type = IIO_ACCEL, \
 440         .modified = 1, \
 441         .channel2 = IIO_MOD_##_axis, \
 442         .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
 443         .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
 444                                 BIT(IIO_CHAN_INFO_SAMP_FREQ), \
 445         .info_mask_shared_by_type_available = BIT(IIO_CHAN_INFO_SAMP_FREQ) | \
 446                                 BIT(IIO_CHAN_INFO_SCALE), \
 447         .scan_index = AXIS_##_axis, \
 448 }
 449
 450 static const struct iio_chan_spec bmi088_accel_channels[] = {
 451         {
 452                 .type = IIO_TEMP,
 453                 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
 454                                       BIT(IIO_CHAN_INFO_SCALE) |
 455                                       BIT(IIO_CHAN_INFO_OFFSET),
 456                 .scan_index = -1,
 457         },
 458         BMI088_ACCEL_CHANNEL(X),
 459         BMI088_ACCEL_CHANNEL(Y),
 460         BMI088_ACCEL_CHANNEL(Z),
 461         IIO_CHAN_SOFT_TIMESTAMP(3),
 462 };
 463
 464 static const struct bmi088_accel_chip_info bmi088_accel_chip_info_tbl[] = {
 465         [BOSCH_BMI085] = {
 466                 .name = "bmi085-accel",
 467                 .chip_id = 0x1F,
 468                 .channels = bmi088_accel_channels,
 469                 .num_channels = ARRAY_SIZE(bmi088_accel_channels),
 470                 .scale_table = {{0, 598}, {0, 1196}, {0, 2393}, {0, 4785}},
 471         },
 472         [BOSCH_BMI088] = {
 473                 .name = "bmi088-accel",
 474                 .chip_id = 0x1E,
 475                 .channels = bmi088_accel_channels,
 476                 .num_channels = ARRAY_SIZE(bmi088_accel_channels),
 477                 .scale_table = {{0, 897}, {0, 1794}, {0, 3589}, {0, 7178}},
 478         },
 479         [BOSCH_BMI090L] = {
 480                 .name = "bmi090l-accel",
 481                 .chip_id = 0x1A,
 482                 .channels = bmi088_accel_channels,
 483                 .num_channels = ARRAY_SIZE(bmi088_accel_channels),
 484                 .scale_table = {{0, 897}, {0, 1794}, {0, 3589}, {0, 7178}},
 485         },
 486 };
 487
 488 static const struct iio_info bmi088_accel_info = {
 489         .read_raw       = bmi088_accel_read_raw,
 490         .write_raw      = bmi088_accel_write_raw,
 491         .read_avail     = bmi088_accel_read_avail,
 492 };
 493
 494 static const unsigned long bmi088_accel_scan_masks[] = {
 495         BIT(AXIS_X) | BIT(AXIS_Y) | BIT(AXIS_Z),
 496         0
 497 };
 498
 499 static int bmi088_accel_chip_init(struct bmi088_accel_data *data, enum bmi_device_type type)
 500 {
 501         struct device *dev = regmap_get_device(data->regmap);
 502         int ret, i;
 503         unsigned int val;
 504
 505         if (type >= BOSCH_UNKNOWN)
 506                 return -ENODEV;
 507
 508         /* Do a dummy read to enable SPI interface, won't harm I2C */
 509         regmap_read(data->regmap, BMI088_ACCEL_REG_INT_STATUS, &val);
 510
 511         /*
 512          * Reset chip to get it in a known good state. A delay of 1ms after
 513          * reset is required according to the data sheet
 514          */
 515         ret = regmap_write(data->regmap, BMI088_ACCEL_REG_RESET,
 516                            BMI088_ACCEL_RESET_VAL);
 517         if (ret)
 518                 return ret;
 519
 520         usleep_range(1000, 2000);
 521
 522         /* Do a dummy read again after a reset to enable the SPI interface */
 523         regmap_read(data->regmap, BMI088_ACCEL_REG_INT_STATUS, &val);
 524
 525         /* Read chip ID */
 526         ret = regmap_read(data->regmap, BMI088_ACCEL_REG_CHIP_ID, &val);
 527         if (ret) {
 528                 dev_err(dev, "Error: Reading chip id\n");
 529                 return ret;
 530         }
 531
 532         /* Validate chip ID */
 533         for (i = 0; i < ARRAY_SIZE(bmi088_accel_chip_info_tbl); i++)
 534                 if (bmi088_accel_chip_info_tbl[i].chip_id == val)
 535                         break;
 536
 537         if (i == ARRAY_SIZE(bmi088_accel_chip_info_tbl))
 538                 data->chip_info = &bmi088_accel_chip_info_tbl[type];
 539         else
 540                 data->chip_info = &bmi088_accel_chip_info_tbl[i];
 541
 542         if (i != type)
 543                 dev_warn(dev, "unexpected chip id 0x%X\n", val);
 544
 545         return 0;
 546 }
 547
 548 int bmi088_accel_core_probe(struct device *dev, struct regmap *regmap,
 549         int irq, enum bmi_device_type type)
 550 {
 551         struct bmi088_accel_data *data;
 552         struct iio_dev *indio_dev;
 553         int ret;
 554
 555         indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
 556         if (!indio_dev)
 557                 return -ENOMEM;
 558
 559         data = iio_priv(indio_dev);
 560         dev_set_drvdata(dev, indio_dev);
 561
 562         data->regmap = regmap;
 563
 564         ret = bmi088_accel_chip_init(data, type);
 565         if (ret)
 566                 return ret;
 567
 568         indio_dev->channels = data->chip_info->channels;
 569         indio_dev->num_channels = data->chip_info->num_channels;
 570         indio_dev->name = data->chip_info->name;
 571         indio_dev->available_scan_masks = bmi088_accel_scan_masks;
 572         indio_dev->modes = INDIO_DIRECT_MODE;
 573         indio_dev->info = &bmi088_accel_info;
 574
 575         /* Enable runtime PM */
 576         pm_runtime_get_noresume(dev);
 577         pm_runtime_set_suspended(dev);
 578         pm_runtime_enable(dev);
 579         /* We need ~6ms to startup, so set the delay to 6 seconds */
 580         pm_runtime_set_autosuspend_delay(dev, 6000);
 581         pm_runtime_use_autosuspend(dev);
 582         pm_runtime_put(dev);
 583
 584         ret = iio_device_register(indio_dev);
 585         if (ret)
 586                 dev_err(dev, "Unable to register iio device\n");
 587
 588         return ret;
 589 }
 590 EXPORT_SYMBOL_NS_GPL(bmi088_accel_core_probe, "IIO_BMI088");
 591
 592
 593 void bmi088_accel_core_remove(struct device *dev)
 594 {
 595         struct iio_dev *indio_dev = dev_get_drvdata(dev);
 596         struct bmi088_accel_data *data = iio_priv(indio_dev);
 597
 598         iio_device_unregister(indio_dev);
 599
 600         pm_runtime_disable(dev);
 601         pm_runtime_set_suspended(dev);
 602         bmi088_accel_power_down(data);
 603 }
 604 EXPORT_SYMBOL_NS_GPL(bmi088_accel_core_remove, "IIO_BMI088");
 605
 606 static int bmi088_accel_runtime_suspend(struct device *dev)
 607 {
 608         struct iio_dev *indio_dev = dev_get_drvdata(dev);
 609         struct bmi088_accel_data *data = iio_priv(indio_dev);
 610
 611         return bmi088_accel_power_down(data);
 612 }
 613
 614 static int bmi088_accel_runtime_resume(struct device *dev)
 615 {
 616         struct iio_dev *indio_dev = dev_get_drvdata(dev);
 617         struct bmi088_accel_data *data = iio_priv(indio_dev);
 618
 619         return bmi088_accel_power_up(data);
 620 }
 621
 622 EXPORT_NS_GPL_RUNTIME_DEV_PM_OPS(bmi088_accel_pm_ops,
 623                                  bmi088_accel_runtime_suspend,
 624                                  bmi088_accel_runtime_resume, NULL,
 625                                  IIO_BMI088);
 626
 627 MODULE_AUTHOR("Niek van Agt <niek.van.agt@topicproducts.com>");
 628 MODULE_LICENSE("GPL v2");
 629 MODULE_DESCRIPTION("BMI088 accelerometer driver (core)");