drivers/iio/magnetometer/hid-sensor-magn-3d.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * HID Sensors Driver
   4  * Copyright (c) 2012, Intel Corporation.
   5  */
   6 #include <linux/device.h>
   7 #include <linux/platform_device.h>
   8 #include <linux/module.h>
   9 #include <linux/mod_devicetable.h>
  10 #include <linux/hid-sensor-hub.h>
  11 #include <linux/iio/iio.h>
  12 #include <linux/iio/buffer.h>
  13 #include "../common/hid-sensors/hid-sensor-trigger.h"
  14
  15 enum magn_3d_channel {
  16         CHANNEL_SCAN_INDEX_X,
  17         CHANNEL_SCAN_INDEX_Y,
  18         CHANNEL_SCAN_INDEX_Z,
  19         CHANNEL_SCAN_INDEX_NORTH_MAGN_TILT_COMP,
  20         CHANNEL_SCAN_INDEX_NORTH_TRUE_TILT_COMP,
  21         CHANNEL_SCAN_INDEX_NORTH_MAGN,
  22         CHANNEL_SCAN_INDEX_NORTH_TRUE,
  23         CHANNEL_SCAN_INDEX_TIMESTAMP,
  24         MAGN_3D_CHANNEL_MAX,
  25 };
  26
  27 struct common_attributes {
  28         int scale_pre_decml;
  29         int scale_post_decml;
  30         int scale_precision;
  31         int value_offset;
  32 };
  33
  34 struct magn_3d_state {
  35         struct hid_sensor_hub_callbacks callbacks;
  36         struct hid_sensor_common magn_flux_attributes;
  37         struct hid_sensor_common rot_attributes;
  38         struct hid_sensor_hub_attribute_info magn[MAGN_3D_CHANNEL_MAX];
  39
  40         /* dynamically sized array to hold sensor values */
  41         u32 *iio_vals;
  42         /* array of pointers to sensor value */
  43         u32 *magn_val_addr[MAGN_3D_CHANNEL_MAX];
  44
  45         struct common_attributes magn_flux_attr;
  46         struct common_attributes rot_attr;
  47         s64 timestamp;
  48 };
  49
  50 static const u32 magn_3d_addresses[MAGN_3D_CHANNEL_MAX] = {
  51         HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS,
  52         HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Y_AXIS,
  53         HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Z_AXIS,
  54         HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH,
  55         HID_USAGE_SENSOR_ORIENT_COMP_TRUE_NORTH,
  56         HID_USAGE_SENSOR_ORIENT_MAGN_NORTH,
  57         HID_USAGE_SENSOR_ORIENT_TRUE_NORTH,
  58         HID_USAGE_SENSOR_TIME_TIMESTAMP,
  59 };
  60
  61 static const u32 magn_3d_sensitivity_addresses[] = {
  62         HID_USAGE_SENSOR_DATA_ORIENTATION,
  63         HID_USAGE_SENSOR_ORIENT_MAGN_FLUX,
  64 };
  65
  66 /* Channel definitions */
  67 static const struct iio_chan_spec magn_3d_channels[] = {
  68         {
  69                 .type = IIO_MAGN,
  70                 .modified = 1,
  71                 .channel2 = IIO_MOD_X,
  72                 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
  73                 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
  74                 BIT(IIO_CHAN_INFO_SCALE) |
  75                 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
  76                 BIT(IIO_CHAN_INFO_HYSTERESIS),
  77         }, {
  78                 .type = IIO_MAGN,
  79                 .modified = 1,
  80                 .channel2 = IIO_MOD_Y,
  81                 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
  82                 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
  83                 BIT(IIO_CHAN_INFO_SCALE) |
  84                 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
  85                 BIT(IIO_CHAN_INFO_HYSTERESIS),
  86         }, {
  87                 .type = IIO_MAGN,
  88                 .modified = 1,
  89                 .channel2 = IIO_MOD_Z,
  90                 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
  91                 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
  92                 BIT(IIO_CHAN_INFO_SCALE) |
  93                 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
  94                 BIT(IIO_CHAN_INFO_HYSTERESIS),
  95         }, {
  96                 .type = IIO_ROT,
  97                 .modified = 1,
  98                 .channel2 = IIO_MOD_NORTH_MAGN_TILT_COMP,
  99                 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
 100                 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
 101                 BIT(IIO_CHAN_INFO_SCALE) |
 102                 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
 103                 BIT(IIO_CHAN_INFO_HYSTERESIS),
 104         }, {
 105                 .type = IIO_ROT,
 106                 .modified = 1,
 107                 .channel2 = IIO_MOD_NORTH_TRUE_TILT_COMP,
 108                 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
 109                 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
 110                 BIT(IIO_CHAN_INFO_SCALE) |
 111                 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
 112                 BIT(IIO_CHAN_INFO_HYSTERESIS),
 113         }, {
 114                 .type = IIO_ROT,
 115                 .modified = 1,
 116                 .channel2 = IIO_MOD_NORTH_MAGN,
 117                 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
 118                 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
 119                 BIT(IIO_CHAN_INFO_SCALE) |
 120                 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
 121                 BIT(IIO_CHAN_INFO_HYSTERESIS),
 122         }, {
 123                 .type = IIO_ROT,
 124                 .modified = 1,
 125                 .channel2 = IIO_MOD_NORTH_TRUE,
 126                 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
 127                 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
 128                 BIT(IIO_CHAN_INFO_SCALE) |
 129                 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
 130                 BIT(IIO_CHAN_INFO_HYSTERESIS),
 131         },
 132         IIO_CHAN_SOFT_TIMESTAMP(7)
 133 };
 134
 135 /* Adjust channel real bits based on report descriptor */
 136 static void magn_3d_adjust_channel_bit_mask(struct iio_chan_spec *channels,
 137                                                 int channel, int size)
 138 {
 139         channels[channel].scan_type.sign = 's';
 140         /* Real storage bits will change based on the report desc. */
 141         channels[channel].scan_type.realbits = size * 8;
 142         /* Maximum size of a sample to capture is u32 */
 143         channels[channel].scan_type.storagebits = sizeof(u32) * 8;
 144 }
 145
 146 /* Channel read_raw handler */
 147 static int magn_3d_read_raw(struct iio_dev *indio_dev,
 148                               struct iio_chan_spec const *chan,
 149                               int *val, int *val2,
 150                               long mask)
 151 {
 152         struct magn_3d_state *magn_state = iio_priv(indio_dev);
 153         int report_id = -1;
 154         u32 address;
 155         int ret_type;
 156         s32 min;
 157
 158         *val = 0;
 159         *val2 = 0;
 160         switch (mask) {
 161         case IIO_CHAN_INFO_RAW:
 162                 hid_sensor_power_state(&magn_state->magn_flux_attributes, true);
 163                 report_id = magn_state->magn[chan->address].report_id;
 164                 min = magn_state->magn[chan->address].logical_minimum;
 165                 address = magn_3d_addresses[chan->address];
 166                 if (report_id >= 0)
 167                         *val = sensor_hub_input_attr_get_raw_value(
 168                                 magn_state->magn_flux_attributes.hsdev,
 169                                 HID_USAGE_SENSOR_COMPASS_3D, address,
 170                                 report_id,
 171                                 SENSOR_HUB_SYNC,
 172                                 min < 0);
 173                 else {
 174                         *val = 0;
 175                         hid_sensor_power_state(
 176                                 &magn_state->magn_flux_attributes,
 177                                 false);
 178                         return -EINVAL;
 179                 }
 180                 hid_sensor_power_state(&magn_state->magn_flux_attributes,
 181                                         false);
 182                 ret_type = IIO_VAL_INT;
 183                 break;
 184         case IIO_CHAN_INFO_SCALE:
 185                 switch (chan->type) {
 186                 case IIO_MAGN:
 187                         *val = magn_state->magn_flux_attr.scale_pre_decml;
 188                         *val2 = magn_state->magn_flux_attr.scale_post_decml;
 189                         ret_type = magn_state->magn_flux_attr.scale_precision;
 190                         break;
 191                 case IIO_ROT:
 192                         *val = magn_state->rot_attr.scale_pre_decml;
 193                         *val2 = magn_state->rot_attr.scale_post_decml;
 194                         ret_type = magn_state->rot_attr.scale_precision;
 195                         break;
 196                 default:
 197                         ret_type = -EINVAL;
 198                 }
 199                 break;
 200         case IIO_CHAN_INFO_OFFSET:
 201                 switch (chan->type) {
 202                 case IIO_MAGN:
 203                         *val = magn_state->magn_flux_attr.value_offset;
 204                         ret_type = IIO_VAL_INT;
 205                         break;
 206                 case IIO_ROT:
 207                         *val = magn_state->rot_attr.value_offset;
 208                         ret_type = IIO_VAL_INT;
 209                         break;
 210                 default:
 211                         ret_type = -EINVAL;
 212                 }
 213                 break;
 214         case IIO_CHAN_INFO_SAMP_FREQ:
 215                 ret_type = hid_sensor_read_samp_freq_value(
 216                         &magn_state->magn_flux_attributes, val, val2);
 217                 break;
 218         case IIO_CHAN_INFO_HYSTERESIS:
 219                 switch (chan->type) {
 220                 case IIO_MAGN:
 221                         ret_type = hid_sensor_read_raw_hyst_value(
 222                                 &magn_state->magn_flux_attributes, val, val2);
 223                         break;
 224                 case IIO_ROT:
 225                         ret_type = hid_sensor_read_raw_hyst_value(
 226                                 &magn_state->rot_attributes, val, val2);
 227                         break;
 228                 default:
 229                         ret_type = -EINVAL;
 230                 }
 231                 break;
 232         default:
 233                 ret_type = -EINVAL;
 234                 break;
 235         }
 236
 237         return ret_type;
 238 }
 239
 240 /* Channel write_raw handler */
 241 static int magn_3d_write_raw(struct iio_dev *indio_dev,
 242                                struct iio_chan_spec const *chan,
 243                                int val,
 244                                int val2,
 245                                long mask)
 246 {
 247         struct magn_3d_state *magn_state = iio_priv(indio_dev);
 248         int ret = 0;
 249
 250         switch (mask) {
 251         case IIO_CHAN_INFO_SAMP_FREQ:
 252                 ret = hid_sensor_write_samp_freq_value(
 253                                 &magn_state->magn_flux_attributes, val, val2);
 254                 break;
 255         case IIO_CHAN_INFO_HYSTERESIS:
 256                 switch (chan->type) {
 257                 case IIO_MAGN:
 258                         ret = hid_sensor_write_raw_hyst_value(
 259                                 &magn_state->magn_flux_attributes, val, val2);
 260                         break;
 261                 case IIO_ROT:
 262                         ret = hid_sensor_write_raw_hyst_value(
 263                                 &magn_state->rot_attributes, val, val2);
 264                         break;
 265                 default:
 266                         ret = -EINVAL;
 267                 }
 268                 break;
 269         default:
 270                 ret = -EINVAL;
 271         }
 272
 273         return ret;
 274 }
 275
 276 static const struct iio_info magn_3d_info = {
 277         .read_raw = &magn_3d_read_raw,
 278         .write_raw = &magn_3d_write_raw,
 279 };
 280
 281 /* Callback handler to send event after all samples are received and captured */
 282 static int magn_3d_proc_event(struct hid_sensor_hub_device *hsdev,
 283                                 unsigned usage_id,
 284                                 void *priv)
 285 {
 286         struct iio_dev *indio_dev = platform_get_drvdata(priv);
 287         struct magn_3d_state *magn_state = iio_priv(indio_dev);
 288
 289         dev_dbg(&indio_dev->dev, "magn_3d_proc_event\n");
 290         if (atomic_read(&magn_state->magn_flux_attributes.data_ready)) {
 291                 if (!magn_state->timestamp)
 292                         magn_state->timestamp = iio_get_time_ns(indio_dev);
 293
 294                 iio_push_to_buffers_with_timestamp(indio_dev,
 295                                                    magn_state->iio_vals,
 296                                                    magn_state->timestamp);
 297                 magn_state->timestamp = 0;
 298         }
 299
 300         return 0;
 301 }
 302
 303 /* Capture samples in local storage */
 304 static int magn_3d_capture_sample(struct hid_sensor_hub_device *hsdev,
 305                                 unsigned usage_id,
 306                                 size_t raw_len, char *raw_data,
 307                                 void *priv)
 308 {
 309         struct iio_dev *indio_dev = platform_get_drvdata(priv);
 310         struct magn_3d_state *magn_state = iio_priv(indio_dev);
 311         int offset;
 312         int ret = 0;
 313         u32 *iio_val = NULL;
 314
 315         switch (usage_id) {
 316         case HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS:
 317         case HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Y_AXIS:
 318         case HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Z_AXIS:
 319                 offset = (usage_id - HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS)
 320                                 + CHANNEL_SCAN_INDEX_X;
 321         break;
 322         case HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH:
 323         case HID_USAGE_SENSOR_ORIENT_COMP_TRUE_NORTH:
 324         case HID_USAGE_SENSOR_ORIENT_MAGN_NORTH:
 325         case HID_USAGE_SENSOR_ORIENT_TRUE_NORTH:
 326                 offset = (usage_id - HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH)
 327                                 + CHANNEL_SCAN_INDEX_NORTH_MAGN_TILT_COMP;
 328         break;
 329         case HID_USAGE_SENSOR_TIME_TIMESTAMP:
 330                 magn_state->timestamp =
 331                         hid_sensor_convert_timestamp(&magn_state->magn_flux_attributes,
 332                                                      *(s64 *)raw_data);
 333                 return ret;
 334         default:
 335                 return -EINVAL;
 336         }
 337
 338         iio_val = magn_state->magn_val_addr[offset];
 339
 340         if (iio_val != NULL)
 341                 *iio_val = *((u32 *)raw_data);
 342         else
 343                 ret = -EINVAL;
 344
 345         return ret;
 346 }
 347
 348 /* Parse report which is specific to an usage id*/
 349 static int magn_3d_parse_report(struct platform_device *pdev,
 350                                 struct hid_sensor_hub_device *hsdev,
 351                                 struct iio_chan_spec **channels,
 352                                 int *chan_count,
 353                                 unsigned usage_id,
 354                                 struct magn_3d_state *st)
 355 {
 356         int i;
 357         int attr_count = 0;
 358         struct iio_chan_spec *_channels;
 359
 360         /* Scan for each usage attribute supported */
 361         for (i = 0; i < MAGN_3D_CHANNEL_MAX; i++) {
 362                 int status;
 363                 u32 address = magn_3d_addresses[i];
 364
 365                 /* Check if usage attribute exists in the sensor hub device */
 366                 status = sensor_hub_input_get_attribute_info(hsdev,
 367                         HID_INPUT_REPORT,
 368                         usage_id,
 369                         address,
 370                         &(st->magn[i]));
 371                 if (!status)
 372                         attr_count++;
 373         }
 374
 375         if (attr_count <= 0) {
 376                 dev_err(&pdev->dev,
 377                         "failed to find any supported usage attributes in report\n");
 378                 return  -EINVAL;
 379         }
 380
 381         dev_dbg(&pdev->dev, "magn_3d Found %d usage attributes\n",
 382                         attr_count);
 383         dev_dbg(&pdev->dev, "magn_3d X: %x:%x Y: %x:%x Z: %x:%x\n",
 384                         st->magn[0].index,
 385                         st->magn[0].report_id,
 386                         st->magn[1].index, st->magn[1].report_id,
 387                         st->magn[2].index, st->magn[2].report_id);
 388
 389         /* Setup IIO channel array */
 390         _channels = devm_kcalloc(&pdev->dev, attr_count,
 391                                 sizeof(struct iio_chan_spec),
 392                                 GFP_KERNEL);
 393         if (!_channels) {
 394                 dev_err(&pdev->dev,
 395                         "failed to allocate space for iio channels\n");
 396                 return -ENOMEM;
 397         }
 398
 399         /* attr_count include timestamp channel, and the iio_vals should be aligned to 8byte */
 400         st->iio_vals = devm_kcalloc(&pdev->dev,
 401                                     ((attr_count + 1) % 2 + (attr_count + 1) / 2) * 2,
 402                                     sizeof(u32), GFP_KERNEL);
 403         if (!st->iio_vals) {
 404                 dev_err(&pdev->dev,
 405                         "failed to allocate space for iio values array\n");
 406                 return -ENOMEM;
 407         }
 408
 409         for (i = 0, *chan_count = 0;
 410         i < MAGN_3D_CHANNEL_MAX && *chan_count < attr_count;
 411         i++){
 412                 if (st->magn[i].index >= 0) {
 413                         /* Setup IIO channel struct */
 414                         (_channels[*chan_count]) = magn_3d_channels[i];
 415                         (_channels[*chan_count]).scan_index = *chan_count;
 416                         (_channels[*chan_count]).address = i;
 417
 418                         if (i != CHANNEL_SCAN_INDEX_TIMESTAMP) {
 419                                 /* Set magn_val_addr to iio value address */
 420                                 st->magn_val_addr[i] = &st->iio_vals[*chan_count];
 421                                 magn_3d_adjust_channel_bit_mask(_channels,
 422                                                                 *chan_count,
 423                                                                 st->magn[i].size);
 424                         }
 425                         (*chan_count)++;
 426                 }
 427         }
 428
 429         if (*chan_count <= 0) {
 430                 dev_err(&pdev->dev,
 431                         "failed to find any magnetic channels setup\n");
 432                 return -EINVAL;
 433         }
 434
 435         *channels = _channels;
 436
 437         dev_dbg(&pdev->dev, "magn_3d Setup %d IIO channels\n",
 438                         *chan_count);
 439
 440         st->magn_flux_attr.scale_precision = hid_sensor_format_scale(
 441                                 HID_USAGE_SENSOR_COMPASS_3D,
 442                                 &st->magn[CHANNEL_SCAN_INDEX_X],
 443                                 &st->magn_flux_attr.scale_pre_decml,
 444                                 &st->magn_flux_attr.scale_post_decml);
 445         st->rot_attr.scale_precision
 446                 = hid_sensor_format_scale(
 447                         HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH,
 448                         &st->magn[CHANNEL_SCAN_INDEX_NORTH_MAGN_TILT_COMP],
 449                         &st->rot_attr.scale_pre_decml,
 450                         &st->rot_attr.scale_post_decml);
 451
 452         if (st->rot_attributes.sensitivity.index < 0) {
 453                 sensor_hub_input_get_attribute_info(hsdev,
 454                         HID_FEATURE_REPORT, usage_id,
 455                         HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
 456                         HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH,
 457                         &st->rot_attributes.sensitivity);
 458                 dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
 459                         st->rot_attributes.sensitivity.index,
 460                         st->rot_attributes.sensitivity.report_id);
 461         }
 462
 463         return 0;
 464 }
 465
 466 /* Function to initialize the processing for usage id */
 467 static int hid_magn_3d_probe(struct platform_device *pdev)
 468 {
 469         struct hid_sensor_hub_device *hsdev = dev_get_platdata(&pdev->dev);
 470         int ret = 0;
 471         static char *name = "magn_3d";
 472         struct iio_dev *indio_dev;
 473         struct magn_3d_state *magn_state;
 474         struct iio_chan_spec *channels;
 475         int chan_count = 0;
 476
 477         indio_dev = devm_iio_device_alloc(&pdev->dev,
 478                                           sizeof(struct magn_3d_state));
 479         if (indio_dev == NULL)
 480                 return -ENOMEM;
 481
 482         platform_set_drvdata(pdev, indio_dev);
 483
 484         magn_state = iio_priv(indio_dev);
 485         magn_state->magn_flux_attributes.hsdev = hsdev;
 486         magn_state->magn_flux_attributes.pdev = pdev;
 487
 488         ret = hid_sensor_parse_common_attributes(hsdev,
 489                                 HID_USAGE_SENSOR_COMPASS_3D,
 490                                 &magn_state->magn_flux_attributes,
 491                                 magn_3d_sensitivity_addresses,
 492                                 ARRAY_SIZE(magn_3d_sensitivity_addresses));
 493         if (ret) {
 494                 dev_err(&pdev->dev, "failed to setup common attributes\n");
 495                 return ret;
 496         }
 497         magn_state->rot_attributes = magn_state->magn_flux_attributes;
 498         /* sensitivity of rot_attribute is not the same as magn_flux_attributes */
 499         magn_state->rot_attributes.sensitivity.index = -1;
 500
 501         ret = magn_3d_parse_report(pdev, hsdev,
 502                                 &channels, &chan_count,
 503                                 HID_USAGE_SENSOR_COMPASS_3D, magn_state);
 504         if (ret) {
 505                 dev_err(&pdev->dev, "failed to parse report\n");
 506                 return ret;
 507         }
 508
 509         indio_dev->channels = channels;
 510         indio_dev->num_channels = chan_count;
 511         indio_dev->info = &magn_3d_info;
 512         indio_dev->name = name;
 513         indio_dev->modes = INDIO_DIRECT_MODE;
 514
 515         atomic_set(&magn_state->magn_flux_attributes.data_ready, 0);
 516
 517         ret = hid_sensor_setup_trigger(indio_dev, name,
 518                                         &magn_state->magn_flux_attributes);
 519         if (ret < 0) {
 520                 dev_err(&pdev->dev, "trigger setup failed\n");
 521                 return ret;
 522         }
 523
 524         ret = iio_device_register(indio_dev);
 525         if (ret) {
 526                 dev_err(&pdev->dev, "device register failed\n");
 527                 goto error_remove_trigger;
 528         }
 529
 530         magn_state->callbacks.send_event = magn_3d_proc_event;
 531         magn_state->callbacks.capture_sample = magn_3d_capture_sample;
 532         magn_state->callbacks.pdev = pdev;
 533         ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_COMPASS_3D,
 534                                         &magn_state->callbacks);
 535         if (ret < 0) {
 536                 dev_err(&pdev->dev, "callback reg failed\n");
 537                 goto error_iio_unreg;
 538         }
 539
 540         return ret;
 541
 542 error_iio_unreg:
 543         iio_device_unregister(indio_dev);
 544 error_remove_trigger:
 545         hid_sensor_remove_trigger(indio_dev, &magn_state->magn_flux_attributes);
 546         return ret;
 547 }
 548
 549 /* Function to deinitialize the processing for usage id */
 550 static void hid_magn_3d_remove(struct platform_device *pdev)
 551 {
 552         struct hid_sensor_hub_device *hsdev = dev_get_platdata(&pdev->dev);
 553         struct iio_dev *indio_dev = platform_get_drvdata(pdev);
 554         struct magn_3d_state *magn_state = iio_priv(indio_dev);
 555
 556         sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_COMPASS_3D);
 557         iio_device_unregister(indio_dev);
 558         hid_sensor_remove_trigger(indio_dev, &magn_state->magn_flux_attributes);
 559 }
 560
 561 static const struct platform_device_id hid_magn_3d_ids[] = {
 562         {
 563                 /* Format: HID-SENSOR-usage_id_in_hex_lowercase */
 564                 .name = "HID-SENSOR-200083",
 565         },
 566         { /* sentinel */ }
 567 };
 568 MODULE_DEVICE_TABLE(platform, hid_magn_3d_ids);
 569
 570 static struct platform_driver hid_magn_3d_platform_driver = {
 571         .id_table = hid_magn_3d_ids,
 572         .driver = {
 573                 .name   = KBUILD_MODNAME,
 574                 .pm     = &hid_sensor_pm_ops,
 575         },
 576         .probe          = hid_magn_3d_probe,
 577         .remove         = hid_magn_3d_remove,
 578 };
 579 module_platform_driver(hid_magn_3d_platform_driver);
 580
 581 MODULE_DESCRIPTION("HID Sensor Magnetometer 3D");
 582 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
 583 MODULE_LICENSE("GPL");
 584 MODULE_IMPORT_NS("IIO_HID");