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

   1 /*
   2  * HID Sensors Driver
   3  * Copyright (c) 2012, Intel Corporation.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  */
  19 #include <linux/device.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/module.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/irq.h>
  24 #include <linux/slab.h>
  25 #include <linux/delay.h>
  26 #include <linux/hid-sensor-hub.h>
  27 #include <linux/iio/iio.h>
  28 #include <linux/iio/sysfs.h>
  29 #include <linux/iio/buffer.h>
  30 #include <linux/iio/trigger_consumer.h>
  31 #include <linux/iio/triggered_buffer.h>
  32 #include "../common/hid-sensors/hid-sensor-trigger.h"
  33
  34 enum magn_3d_channel {
  35         CHANNEL_SCAN_INDEX_X,
  36         CHANNEL_SCAN_INDEX_Y,
  37         CHANNEL_SCAN_INDEX_Z,
  38         CHANNEL_SCAN_INDEX_NORTH_MAGN_TILT_COMP,
  39         CHANNEL_SCAN_INDEX_NORTH_TRUE_TILT_COMP,
  40         CHANNEL_SCAN_INDEX_NORTH_MAGN,
  41         CHANNEL_SCAN_INDEX_NORTH_TRUE,
  42         MAGN_3D_CHANNEL_MAX,
  43 };
  44
  45 struct common_attributes {
  46         int scale_pre_decml;
  47         int scale_post_decml;
  48         int scale_precision;
  49         int value_offset;
  50 };
  51
  52 struct magn_3d_state {
  53         struct hid_sensor_hub_callbacks callbacks;
  54         struct hid_sensor_common magn_flux_attributes;
  55         struct hid_sensor_common rot_attributes;
  56         struct hid_sensor_hub_attribute_info magn[MAGN_3D_CHANNEL_MAX];
  57
  58         /* dynamically sized array to hold sensor values */
  59         u32 *iio_vals;
  60         /* array of pointers to sensor value */
  61         u32 *magn_val_addr[MAGN_3D_CHANNEL_MAX];
  62
  63         struct common_attributes magn_flux_attr;
  64         struct common_attributes rot_attr;
  65 };
  66
  67 static const u32 magn_3d_addresses[MAGN_3D_CHANNEL_MAX] = {
  68         HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS,
  69         HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Y_AXIS,
  70         HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Z_AXIS,
  71         HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH,
  72         HID_USAGE_SENSOR_ORIENT_COMP_TRUE_NORTH,
  73         HID_USAGE_SENSOR_ORIENT_MAGN_NORTH,
  74         HID_USAGE_SENSOR_ORIENT_TRUE_NORTH,
  75 };
  76
  77 /* Channel definitions */
  78 static const struct iio_chan_spec magn_3d_channels[] = {
  79         {
  80                 .type = IIO_MAGN,
  81                 .modified = 1,
  82                 .channel2 = IIO_MOD_X,
  83                 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
  84                 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
  85                 BIT(IIO_CHAN_INFO_SCALE) |
  86                 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
  87                 BIT(IIO_CHAN_INFO_HYSTERESIS),
  88         }, {
  89                 .type = IIO_MAGN,
  90                 .modified = 1,
  91                 .channel2 = IIO_MOD_Y,
  92                 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
  93                 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
  94                 BIT(IIO_CHAN_INFO_SCALE) |
  95                 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
  96                 BIT(IIO_CHAN_INFO_HYSTERESIS),
  97         }, {
  98                 .type = IIO_MAGN,
  99                 .modified = 1,
 100                 .channel2 = IIO_MOD_Z,
 101                 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
 102                 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
 103                 BIT(IIO_CHAN_INFO_SCALE) |
 104                 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
 105                 BIT(IIO_CHAN_INFO_HYSTERESIS),
 106         }, {
 107                 .type = IIO_ROT,
 108                 .modified = 1,
 109                 .channel2 = IIO_MOD_NORTH_MAGN_TILT_COMP,
 110                 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
 111                 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
 112                 BIT(IIO_CHAN_INFO_SCALE) |
 113                 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
 114                 BIT(IIO_CHAN_INFO_HYSTERESIS),
 115         }, {
 116                 .type = IIO_ROT,
 117                 .modified = 1,
 118                 .channel2 = IIO_MOD_NORTH_TRUE_TILT_COMP,
 119                 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
 120                 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
 121                 BIT(IIO_CHAN_INFO_SCALE) |
 122                 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
 123                 BIT(IIO_CHAN_INFO_HYSTERESIS),
 124         }, {
 125                 .type = IIO_ROT,
 126                 .modified = 1,
 127                 .channel2 = IIO_MOD_NORTH_MAGN,
 128                 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
 129                 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
 130                 BIT(IIO_CHAN_INFO_SCALE) |
 131                 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
 132                 BIT(IIO_CHAN_INFO_HYSTERESIS),
 133         }, {
 134                 .type = IIO_ROT,
 135                 .modified = 1,
 136                 .channel2 = IIO_MOD_NORTH_TRUE,
 137                 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
 138                 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
 139                 BIT(IIO_CHAN_INFO_SCALE) |
 140                 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
 141                 BIT(IIO_CHAN_INFO_HYSTERESIS),
 142         }
 143 };
 144
 145 /* Adjust channel real bits based on report descriptor */
 146 static void magn_3d_adjust_channel_bit_mask(struct iio_chan_spec *channels,
 147                                                 int channel, int size)
 148 {
 149         channels[channel].scan_type.sign = 's';
 150         /* Real storage bits will change based on the report desc. */
 151         channels[channel].scan_type.realbits = size * 8;
 152         /* Maximum size of a sample to capture is u32 */
 153         channels[channel].scan_type.storagebits = sizeof(u32) * 8;
 154 }
 155
 156 /* Channel read_raw handler */
 157 static int magn_3d_read_raw(struct iio_dev *indio_dev,
 158                               struct iio_chan_spec const *chan,
 159                               int *val, int *val2,
 160                               long mask)
 161 {
 162         struct magn_3d_state *magn_state = iio_priv(indio_dev);
 163         int report_id = -1;
 164         u32 address;
 165         int ret_type;
 166
 167         *val = 0;
 168         *val2 = 0;
 169         switch (mask) {
 170         case 0:
 171                 hid_sensor_power_state(&magn_state->magn_flux_attributes, true);
 172                 report_id =
 173                         magn_state->magn[chan->address].report_id;
 174                 address = magn_3d_addresses[chan->address];
 175                 if (report_id >= 0)
 176                         *val = sensor_hub_input_attr_get_raw_value(
 177                                 magn_state->magn_flux_attributes.hsdev,
 178                                 HID_USAGE_SENSOR_COMPASS_3D, address,
 179                                 report_id,
 180                                 SENSOR_HUB_SYNC);
 181                 else {
 182                         *val = 0;
 183                         hid_sensor_power_state(
 184                                 &magn_state->magn_flux_attributes,
 185                                 false);
 186                         return -EINVAL;
 187                 }
 188                 hid_sensor_power_state(&magn_state->magn_flux_attributes,
 189                                         false);
 190                 ret_type = IIO_VAL_INT;
 191                 break;
 192         case IIO_CHAN_INFO_SCALE:
 193                 switch (chan->type) {
 194                 case IIO_MAGN:
 195                         *val = magn_state->magn_flux_attr.scale_pre_decml;
 196                         *val2 = magn_state->magn_flux_attr.scale_post_decml;
 197                         ret_type = magn_state->magn_flux_attr.scale_precision;
 198                         break;
 199                 case IIO_ROT:
 200                         *val = magn_state->rot_attr.scale_pre_decml;
 201                         *val2 = magn_state->rot_attr.scale_post_decml;
 202                         ret_type = magn_state->rot_attr.scale_precision;
 203                         break;
 204                 default:
 205                         ret_type = -EINVAL;
 206                 }
 207                 break;
 208         case IIO_CHAN_INFO_OFFSET:
 209                 switch (chan->type) {
 210                 case IIO_MAGN:
 211                         *val = magn_state->magn_flux_attr.value_offset;
 212                         ret_type = IIO_VAL_INT;
 213                         break;
 214                 case IIO_ROT:
 215                         *val = magn_state->rot_attr.value_offset;
 216                         ret_type = IIO_VAL_INT;
 217                         break;
 218                 default:
 219                         ret_type = -EINVAL;
 220                 }
 221                 break;
 222         case IIO_CHAN_INFO_SAMP_FREQ:
 223                 ret_type = hid_sensor_read_samp_freq_value(
 224                         &magn_state->magn_flux_attributes, val, val2);
 225                 break;
 226         case IIO_CHAN_INFO_HYSTERESIS:
 227                 switch (chan->type) {
 228                 case IIO_MAGN:
 229                         ret_type = hid_sensor_read_raw_hyst_value(
 230                                 &magn_state->magn_flux_attributes, val, val2);
 231                         break;
 232                 case IIO_ROT:
 233                         ret_type = hid_sensor_read_raw_hyst_value(
 234                                 &magn_state->rot_attributes, val, val2);
 235                         break;
 236                 default:
 237                         ret_type = -EINVAL;
 238                 }
 239                 break;
 240         default:
 241                 ret_type = -EINVAL;
 242                 break;
 243         }
 244
 245         return ret_type;
 246 }
 247
 248 /* Channel write_raw handler */
 249 static int magn_3d_write_raw(struct iio_dev *indio_dev,
 250                                struct iio_chan_spec const *chan,
 251                                int val,
 252                                int val2,
 253                                long mask)
 254 {
 255         struct magn_3d_state *magn_state = iio_priv(indio_dev);
 256         int ret = 0;
 257
 258         switch (mask) {
 259         case IIO_CHAN_INFO_SAMP_FREQ:
 260                 ret = hid_sensor_write_samp_freq_value(
 261                                 &magn_state->magn_flux_attributes, val, val2);
 262                 break;
 263         case IIO_CHAN_INFO_HYSTERESIS:
 264                 switch (chan->type) {
 265                 case IIO_MAGN:
 266                         ret = hid_sensor_write_raw_hyst_value(
 267                                 &magn_state->magn_flux_attributes, val, val2);
 268                         break;
 269                 case IIO_ROT:
 270                         ret = hid_sensor_write_raw_hyst_value(
 271                                 &magn_state->rot_attributes, val, val2);
 272                         break;
 273                 default:
 274                         ret = -EINVAL;
 275                 }
 276                 break;
 277         default:
 278                 ret = -EINVAL;
 279         }
 280
 281         return ret;
 282 }
 283
 284 static const struct iio_info magn_3d_info = {
 285         .driver_module = THIS_MODULE,
 286         .read_raw = &magn_3d_read_raw,
 287         .write_raw = &magn_3d_write_raw,
 288 };
 289
 290 /* Function to push data to buffer */
 291 static void hid_sensor_push_data(struct iio_dev *indio_dev, const void *data)
 292 {
 293         dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
 294         iio_push_to_buffers(indio_dev, data);
 295 }
 296
 297 /* Callback handler to send event after all samples are received and captured */
 298 static int magn_3d_proc_event(struct hid_sensor_hub_device *hsdev,
 299                                 unsigned usage_id,
 300                                 void *priv)
 301 {
 302         struct iio_dev *indio_dev = platform_get_drvdata(priv);
 303         struct magn_3d_state *magn_state = iio_priv(indio_dev);
 304
 305         dev_dbg(&indio_dev->dev, "magn_3d_proc_event\n");
 306         if (atomic_read(&magn_state->magn_flux_attributes.data_ready))
 307                 hid_sensor_push_data(indio_dev, magn_state->iio_vals);
 308
 309         return 0;
 310 }
 311
 312 /* Capture samples in local storage */
 313 static int magn_3d_capture_sample(struct hid_sensor_hub_device *hsdev,
 314                                 unsigned usage_id,
 315                                 size_t raw_len, char *raw_data,
 316                                 void *priv)
 317 {
 318         struct iio_dev *indio_dev = platform_get_drvdata(priv);
 319         struct magn_3d_state *magn_state = iio_priv(indio_dev);
 320         int offset;
 321         int ret = 0;
 322         u32 *iio_val = NULL;
 323
 324         switch (usage_id) {
 325         case HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS:
 326         case HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Y_AXIS:
 327         case HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Z_AXIS:
 328                 offset = (usage_id - HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS)
 329                                 + CHANNEL_SCAN_INDEX_X;
 330         break;
 331         case HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH:
 332         case HID_USAGE_SENSOR_ORIENT_COMP_TRUE_NORTH:
 333         case HID_USAGE_SENSOR_ORIENT_MAGN_NORTH:
 334         case HID_USAGE_SENSOR_ORIENT_TRUE_NORTH:
 335                 offset = (usage_id - HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH)
 336                                 + CHANNEL_SCAN_INDEX_NORTH_MAGN_TILT_COMP;
 337         break;
 338         default:
 339                 return -EINVAL;
 340         }
 341
 342         iio_val = magn_state->magn_val_addr[offset];
 343
 344         if (iio_val != NULL)
 345                 *iio_val = *((u32 *)raw_data);
 346         else
 347                 ret = -EINVAL;
 348
 349         return ret;
 350 }
 351
 352 /* Parse report which is specific to an usage id*/
 353 static int magn_3d_parse_report(struct platform_device *pdev,
 354                                 struct hid_sensor_hub_device *hsdev,
 355                                 struct iio_chan_spec **channels,
 356                                 int *chan_count,
 357                                 unsigned usage_id,
 358                                 struct magn_3d_state *st)
 359 {
 360         int i;
 361         int attr_count = 0;
 362         struct iio_chan_spec *_channels;
 363
 364         /* Scan for each usage attribute supported */
 365         for (i = 0; i < MAGN_3D_CHANNEL_MAX; i++) {
 366                 int status;
 367                 u32 address = magn_3d_addresses[i];
 368
 369                 /* Check if usage attribute exists in the sensor hub device */
 370                 status = sensor_hub_input_get_attribute_info(hsdev,
 371                         HID_INPUT_REPORT,
 372                         usage_id,
 373                         address,
 374                         &(st->magn[i]));
 375                 if (!status)
 376                         attr_count++;
 377         }
 378
 379         if (attr_count <= 0) {
 380                 dev_err(&pdev->dev,
 381                         "failed to find any supported usage attributes in report\n");
 382                 return  -EINVAL;
 383         }
 384
 385         dev_dbg(&pdev->dev, "magn_3d Found %d usage attributes\n",
 386                         attr_count);
 387         dev_dbg(&pdev->dev, "magn_3d X: %x:%x Y: %x:%x Z: %x:%x\n",
 388                         st->magn[0].index,
 389                         st->magn[0].report_id,
 390                         st->magn[1].index, st->magn[1].report_id,
 391                         st->magn[2].index, st->magn[2].report_id);
 392
 393         /* Setup IIO channel array */
 394         _channels = devm_kcalloc(&pdev->dev, attr_count,
 395                                 sizeof(struct iio_chan_spec),
 396                                 GFP_KERNEL);
 397         if (!_channels) {
 398                 dev_err(&pdev->dev,
 399                         "failed to allocate space for iio channels\n");
 400                 return -ENOMEM;
 401         }
 402
 403         st->iio_vals = devm_kcalloc(&pdev->dev, attr_count,
 404                                 sizeof(u32),
 405                                 GFP_KERNEL);
 406         if (!st->iio_vals) {
 407                 dev_err(&pdev->dev,
 408                         "failed to allocate space for iio values array\n");
 409                 return -ENOMEM;
 410         }
 411
 412         for (i = 0, *chan_count = 0;
 413         i < MAGN_3D_CHANNEL_MAX && *chan_count < attr_count;
 414         i++){
 415                 if (st->magn[i].index >= 0) {
 416                         /* Setup IIO channel struct */
 417                         (_channels[*chan_count]) = magn_3d_channels[i];
 418                         (_channels[*chan_count]).scan_index = *chan_count;
 419                         (_channels[*chan_count]).address = i;
 420
 421                         /* Set magn_val_addr to iio value address */
 422                         st->magn_val_addr[i] = &(st->iio_vals[*chan_count]);
 423                         magn_3d_adjust_channel_bit_mask(_channels,
 424                                                         *chan_count,
 425                                                         st->magn[i].size);
 426                         (*chan_count)++;
 427                 }
 428         }
 429
 430         if (*chan_count <= 0) {
 431                 dev_err(&pdev->dev,
 432                         "failed to find any magnetic channels setup\n");
 433                 return -EINVAL;
 434         }
 435
 436         *channels = _channels;
 437
 438         dev_dbg(&pdev->dev, "magn_3d Setup %d IIO channels\n",
 439                         *chan_count);
 440
 441         st->magn_flux_attr.scale_precision = hid_sensor_format_scale(
 442                                 HID_USAGE_SENSOR_COMPASS_3D,
 443                                 &st->magn[CHANNEL_SCAN_INDEX_X],
 444                                 &st->magn_flux_attr.scale_pre_decml,
 445                                 &st->magn_flux_attr.scale_post_decml);
 446         st->rot_attr.scale_precision
 447                 = hid_sensor_format_scale(
 448                         HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH,
 449                         &st->magn[CHANNEL_SCAN_INDEX_NORTH_MAGN_TILT_COMP],
 450                         &st->rot_attr.scale_pre_decml,
 451                         &st->rot_attr.scale_post_decml);
 452
 453         /* Set Sensitivity field ids, when there is no individual modifier */
 454         if (st->magn_flux_attributes.sensitivity.index < 0) {
 455                 sensor_hub_input_get_attribute_info(hsdev,
 456                         HID_FEATURE_REPORT, usage_id,
 457                         HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
 458                         HID_USAGE_SENSOR_DATA_ORIENTATION,
 459                         &st->magn_flux_attributes.sensitivity);
 460                 dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
 461                         st->magn_flux_attributes.sensitivity.index,
 462                         st->magn_flux_attributes.sensitivity.report_id);
 463         }
 464         if (st->magn_flux_attributes.sensitivity.index < 0) {
 465                 sensor_hub_input_get_attribute_info(hsdev,
 466                         HID_FEATURE_REPORT, usage_id,
 467                         HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
 468                         HID_USAGE_SENSOR_ORIENT_MAGN_FLUX,
 469                         &st->magn_flux_attributes.sensitivity);
 470                 dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
 471                         st->magn_flux_attributes.sensitivity.index,
 472                         st->magn_flux_attributes.sensitivity.report_id);
 473         }
 474         if (st->rot_attributes.sensitivity.index < 0) {
 475                 sensor_hub_input_get_attribute_info(hsdev,
 476                         HID_FEATURE_REPORT, usage_id,
 477                         HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
 478                         HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH,
 479                         &st->rot_attributes.sensitivity);
 480                 dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
 481                         st->rot_attributes.sensitivity.index,
 482                         st->rot_attributes.sensitivity.report_id);
 483         }
 484
 485         return 0;
 486 }
 487
 488 /* Function to initialize the processing for usage id */
 489 static int hid_magn_3d_probe(struct platform_device *pdev)
 490 {
 491         int ret = 0;
 492         static char *name = "magn_3d";
 493         struct iio_dev *indio_dev;
 494         struct magn_3d_state *magn_state;
 495         struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
 496         struct iio_chan_spec *channels;
 497         int chan_count = 0;
 498
 499         indio_dev = devm_iio_device_alloc(&pdev->dev,
 500                                           sizeof(struct magn_3d_state));
 501         if (indio_dev == NULL)
 502                 return -ENOMEM;
 503
 504         platform_set_drvdata(pdev, indio_dev);
 505
 506         magn_state = iio_priv(indio_dev);
 507         magn_state->magn_flux_attributes.hsdev = hsdev;
 508         magn_state->magn_flux_attributes.pdev = pdev;
 509
 510         ret = hid_sensor_parse_common_attributes(hsdev,
 511                                 HID_USAGE_SENSOR_COMPASS_3D,
 512                                 &magn_state->magn_flux_attributes);
 513         if (ret) {
 514                 dev_err(&pdev->dev, "failed to setup common attributes\n");
 515                 return ret;
 516         }
 517         magn_state->rot_attributes = magn_state->magn_flux_attributes;
 518
 519         ret = magn_3d_parse_report(pdev, hsdev,
 520                                 &channels, &chan_count,
 521                                 HID_USAGE_SENSOR_COMPASS_3D, magn_state);
 522         if (ret) {
 523                 dev_err(&pdev->dev, "failed to parse report\n");
 524                 return ret;
 525         }
 526
 527         indio_dev->channels = channels;
 528         indio_dev->num_channels = chan_count;
 529         indio_dev->dev.parent = &pdev->dev;
 530         indio_dev->info = &magn_3d_info;
 531         indio_dev->name = name;
 532         indio_dev->modes = INDIO_DIRECT_MODE;
 533
 534         ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
 535                 NULL, NULL);
 536         if (ret) {
 537                 dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
 538                 return ret;
 539         }
 540         atomic_set(&magn_state->magn_flux_attributes.data_ready, 0);
 541         ret = hid_sensor_setup_trigger(indio_dev, name,
 542                                         &magn_state->magn_flux_attributes);
 543         if (ret < 0) {
 544                 dev_err(&pdev->dev, "trigger setup failed\n");
 545                 goto error_unreg_buffer_funcs;
 546         }
 547
 548         ret = iio_device_register(indio_dev);
 549         if (ret) {
 550                 dev_err(&pdev->dev, "device register failed\n");
 551                 goto error_remove_trigger;
 552         }
 553
 554         magn_state->callbacks.send_event = magn_3d_proc_event;
 555         magn_state->callbacks.capture_sample = magn_3d_capture_sample;
 556         magn_state->callbacks.pdev = pdev;
 557         ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_COMPASS_3D,
 558                                         &magn_state->callbacks);
 559         if (ret < 0) {
 560                 dev_err(&pdev->dev, "callback reg failed\n");
 561                 goto error_iio_unreg;
 562         }
 563
 564         return ret;
 565
 566 error_iio_unreg:
 567         iio_device_unregister(indio_dev);
 568 error_remove_trigger:
 569         hid_sensor_remove_trigger(&magn_state->magn_flux_attributes);
 570 error_unreg_buffer_funcs:
 571         iio_triggered_buffer_cleanup(indio_dev);
 572         return ret;
 573 }
 574
 575 /* Function to deinitialize the processing for usage id */
 576 static int hid_magn_3d_remove(struct platform_device *pdev)
 577 {
 578         struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
 579         struct iio_dev *indio_dev = platform_get_drvdata(pdev);
 580         struct magn_3d_state *magn_state = iio_priv(indio_dev);
 581
 582         sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_COMPASS_3D);
 583         iio_device_unregister(indio_dev);
 584         hid_sensor_remove_trigger(&magn_state->magn_flux_attributes);
 585         iio_triggered_buffer_cleanup(indio_dev);
 586
 587         return 0;
 588 }
 589
 590 static const struct platform_device_id hid_magn_3d_ids[] = {
 591         {
 592                 /* Format: HID-SENSOR-usage_id_in_hex_lowercase */
 593                 .name = "HID-SENSOR-200083",
 594         },
 595         { /* sentinel */ }
 596 };
 597 MODULE_DEVICE_TABLE(platform, hid_magn_3d_ids);
 598
 599 static struct platform_driver hid_magn_3d_platform_driver = {
 600         .id_table = hid_magn_3d_ids,
 601         .driver = {
 602                 .name   = KBUILD_MODNAME,
 603                 .pm     = &hid_sensor_pm_ops,
 604         },
 605         .probe          = hid_magn_3d_probe,
 606         .remove         = hid_magn_3d_remove,
 607 };
 608 module_platform_driver(hid_magn_3d_platform_driver);
 609
 610 MODULE_DESCRIPTION("HID Sensor Magnetometer 3D");
 611 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
 612 MODULE_LICENSE("GPL");