drivers/hid/hid-sensor-hub.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/hid.h>
  21 #include <linux/module.h>
  22 #include <linux/slab.h>
  23 #include <linux/mfd/core.h>
  24 #include <linux/list.h>
  25 #include <linux/hid-sensor-ids.h>
  26 #include <linux/hid-sensor-hub.h>
  27 #include "hid-ids.h"
  28
  29 /**
  30  * struct sensor_hub_pending - Synchronous read pending information
  31  * @status:             Pending status true/false.
  32  * @ready:              Completion synchronization data.
  33  * @usage_id:           Usage id for physical device, E.g. Gyro usage id.
  34  * @attr_usage_id:      Usage Id of a field, E.g. X-AXIS for a gyro.
  35  * @raw_size:           Response size for a read request.
  36  * @raw_data:           Place holder for received response.
  37  */
  38 struct sensor_hub_pending {
  39         bool status;
  40         struct completion ready;
  41         u32 usage_id;
  42         u32 attr_usage_id;
  43         int raw_size;
  44         u8  *raw_data;
  45 };
  46
  47 /**
  48  * struct sensor_hub_data - Hold a instance data for a HID hub device
  49  * @hsdev:              Stored hid instance for current hub device.
  50  * @mutex:              Mutex to serialize synchronous request.
  51  * @lock:               Spin lock to protect pending request structure.
  52  * @pending:            Holds information of pending sync read request.
  53  * @dyn_callback_list:  Holds callback function
  54  * @dyn_callback_lock:  spin lock to protect callback list
  55  * @hid_sensor_hub_client_devs: Stores all MFD cells for a hub instance.
  56  * @hid_sensor_client_cnt: Number of MFD cells, (no of sensors attached).
  57  */
  58 struct sensor_hub_data {
  59         struct hid_sensor_hub_device *hsdev;
  60         struct mutex mutex;
  61         spinlock_t lock;
  62         struct sensor_hub_pending pending;
  63         struct list_head dyn_callback_list;
  64         spinlock_t dyn_callback_lock;
  65         struct mfd_cell *hid_sensor_hub_client_devs;
  66         int hid_sensor_client_cnt;
  67 };
  68
  69 /**
  70  * struct hid_sensor_hub_callbacks_list - Stores callback list
  71  * @list:               list head.
  72  * @usage_id:           usage id for a physical device.
  73  * @usage_callback:     Stores registered callback functions.
  74  * @priv:               Private data for a physical device.
  75  */
  76 struct hid_sensor_hub_callbacks_list {
  77         struct list_head list;
  78         u32 usage_id;
  79         struct hid_sensor_hub_callbacks *usage_callback;
  80         void *priv;
  81 };
  82
  83 static struct hid_report *sensor_hub_report(int id, struct hid_device *hdev,
  84                                                 int dir)
  85 {
  86         struct hid_report *report;
  87
  88         list_for_each_entry(report, &hdev->report_enum[dir].report_list, list) {
  89                 if (report->id == id)
  90                         return report;
  91         }
  92         hid_warn(hdev, "No report with id 0x%x found\n", id);
  93
  94         return NULL;
  95 }
  96
  97 static int sensor_hub_get_physical_device_count(
  98                                 struct hid_report_enum *report_enum)
  99 {
 100         struct hid_report *report;
 101         struct hid_field *field;
 102         int cnt = 0;
 103
 104         list_for_each_entry(report, &report_enum->report_list, list) {
 105                 field = report->field[0];
 106                 if (report->maxfield && field && field->physical)
 107                         cnt++;
 108         }
 109
 110         return cnt;
 111 }
 112
 113 static void sensor_hub_fill_attr_info(
 114                 struct hid_sensor_hub_attribute_info *info,
 115                 s32 index, s32 report_id, s32 units, s32 unit_expo, s32 size)
 116 {
 117         info->index = index;
 118         info->report_id = report_id;
 119         info->units = units;
 120         info->unit_expo = unit_expo;
 121         info->size = size/8;
 122 }
 123
 124 static struct hid_sensor_hub_callbacks *sensor_hub_get_callback(
 125                                         struct hid_device *hdev,
 126                                         u32 usage_id, void **priv)
 127 {
 128         struct hid_sensor_hub_callbacks_list *callback;
 129         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
 130
 131         spin_lock(&pdata->dyn_callback_lock);
 132         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
 133                 if (callback->usage_id == usage_id) {
 134                         *priv = callback->priv;
 135                         spin_unlock(&pdata->dyn_callback_lock);
 136                         return callback->usage_callback;
 137                 }
 138         spin_unlock(&pdata->dyn_callback_lock);
 139
 140         return NULL;
 141 }
 142
 143 int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev,
 144                         u32 usage_id,
 145                         struct hid_sensor_hub_callbacks *usage_callback)
 146 {
 147         struct hid_sensor_hub_callbacks_list *callback;
 148         struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
 149
 150         spin_lock(&pdata->dyn_callback_lock);
 151         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
 152                 if (callback->usage_id == usage_id) {
 153                         spin_unlock(&pdata->dyn_callback_lock);
 154                         return -EINVAL;
 155                 }
 156         callback = kzalloc(sizeof(*callback), GFP_ATOMIC);
 157         if (!callback) {
 158                 spin_unlock(&pdata->dyn_callback_lock);
 159                 return -ENOMEM;
 160         }
 161         callback->usage_callback = usage_callback;
 162         callback->usage_id = usage_id;
 163         callback->priv = NULL;
 164         list_add_tail(&callback->list, &pdata->dyn_callback_list);
 165         spin_unlock(&pdata->dyn_callback_lock);
 166
 167         return 0;
 168 }
 169 EXPORT_SYMBOL_GPL(sensor_hub_register_callback);
 170
 171 int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev,
 172                                 u32 usage_id)
 173 {
 174         struct hid_sensor_hub_callbacks_list *callback;
 175         struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
 176
 177         spin_lock(&pdata->dyn_callback_lock);
 178         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
 179                 if (callback->usage_id == usage_id) {
 180                         list_del(&callback->list);
 181                         kfree(callback);
 182                         break;
 183                 }
 184         spin_unlock(&pdata->dyn_callback_lock);
 185
 186         return 0;
 187 }
 188 EXPORT_SYMBOL_GPL(sensor_hub_remove_callback);
 189
 190 int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
 191                                 u32 field_index, s32 value)
 192 {
 193         struct hid_report *report;
 194         struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
 195         int ret = 0;
 196
 197         mutex_lock(&data->mutex);
 198         report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
 199         if (!report || (field_index >= report->maxfield)) {
 200                 ret = -EINVAL;
 201                 goto done_proc;
 202         }
 203         hid_set_field(report->field[field_index], 0, value);
 204         hid_hw_request(hsdev->hdev, report, HID_REQ_SET_REPORT);
 205         hid_hw_wait(hsdev->hdev);
 206
 207 done_proc:
 208         mutex_unlock(&data->mutex);
 209
 210         return ret;
 211 }
 212 EXPORT_SYMBOL_GPL(sensor_hub_set_feature);
 213
 214 int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
 215                                 u32 field_index, s32 *value)
 216 {
 217         struct hid_report *report;
 218         struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
 219         int ret = 0;
 220
 221         mutex_lock(&data->mutex);
 222         report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
 223         if (!report || (field_index >= report->maxfield) ||
 224             report->field[field_index]->report_count < 1) {
 225                 ret = -EINVAL;
 226                 goto done_proc;
 227         }
 228         hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
 229         hid_hw_wait(hsdev->hdev);
 230         *value = report->field[field_index]->value[0];
 231
 232 done_proc:
 233         mutex_unlock(&data->mutex);
 234
 235         return ret;
 236 }
 237 EXPORT_SYMBOL_GPL(sensor_hub_get_feature);
 238
 239
 240 int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev,
 241                                         u32 usage_id,
 242                                         u32 attr_usage_id, u32 report_id)
 243 {
 244         struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
 245         unsigned long flags;
 246         struct hid_report *report;
 247         int ret_val = 0;
 248
 249         mutex_lock(&data->mutex);
 250         memset(&data->pending, 0, sizeof(data->pending));
 251         init_completion(&data->pending.ready);
 252         data->pending.usage_id = usage_id;
 253         data->pending.attr_usage_id = attr_usage_id;
 254         data->pending.raw_size = 0;
 255
 256         spin_lock_irqsave(&data->lock, flags);
 257         data->pending.status = true;
 258         report = sensor_hub_report(report_id, hsdev->hdev, HID_INPUT_REPORT);
 259         if (!report) {
 260                 spin_unlock_irqrestore(&data->lock, flags);
 261                 goto err_free;
 262         }
 263         hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
 264         spin_unlock_irqrestore(&data->lock, flags);
 265         wait_for_completion_interruptible_timeout(&data->pending.ready, HZ*5);
 266         switch (data->pending.raw_size) {
 267         case 1:
 268                 ret_val = *(u8 *)data->pending.raw_data;
 269                 break;
 270         case 2:
 271                 ret_val = *(u16 *)data->pending.raw_data;
 272                 break;
 273         case 4:
 274                 ret_val = *(u32 *)data->pending.raw_data;
 275                 break;
 276         default:
 277                 ret_val = 0;
 278         }
 279         kfree(data->pending.raw_data);
 280
 281 err_free:
 282         data->pending.status = false;
 283         mutex_unlock(&data->mutex);
 284
 285         return ret_val;
 286 }
 287 EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value);
 288
 289 int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev,
 290                                 u8 type,
 291                                 u32 usage_id,
 292                                 u32 attr_usage_id,
 293                                 struct hid_sensor_hub_attribute_info *info)
 294 {
 295         int ret = -1;
 296         int i, j;
 297         int collection_index = -1;
 298         struct hid_report *report;
 299         struct hid_field *field;
 300         struct hid_report_enum *report_enum;
 301         struct hid_device *hdev = hsdev->hdev;
 302
 303         /* Initialize with defaults */
 304         info->usage_id = usage_id;
 305         info->attrib_id = attr_usage_id;
 306         info->report_id = -1;
 307         info->index = -1;
 308         info->units = -1;
 309         info->unit_expo = -1;
 310
 311         for (i = 0; i < hdev->maxcollection; ++i) {
 312                 struct hid_collection *collection = &hdev->collection[i];
 313                 if (usage_id == collection->usage) {
 314                         collection_index = i;
 315                         break;
 316                 }
 317         }
 318         if (collection_index == -1)
 319                 goto err_ret;
 320
 321         report_enum = &hdev->report_enum[type];
 322         list_for_each_entry(report, &report_enum->report_list, list) {
 323                 for (i = 0; i < report->maxfield; ++i) {
 324                         field = report->field[i];
 325                         if (field->physical == usage_id &&
 326                                 field->logical == attr_usage_id) {
 327                                 sensor_hub_fill_attr_info(info, i, report->id,
 328                                         field->unit, field->unit_exponent,
 329                                         field->report_size *
 330                                                         field->report_count);
 331                                 ret = 0;
 332                         } else {
 333                                 for (j = 0; j < field->maxusage; ++j) {
 334                                         if (field->usage[j].hid ==
 335                                         attr_usage_id &&
 336                                         field->usage[j].collection_index ==
 337                                         collection_index) {
 338                                                 sensor_hub_fill_attr_info(info,
 339                                                         i, report->id,
 340                                                         field->unit,
 341                                                         field->unit_exponent,
 342                                                         field->report_size *
 343                                                         field->report_count);
 344                                                 ret = 0;
 345                                                 break;
 346                                         }
 347                                 }
 348                         }
 349                         if (ret == 0)
 350                                 break;
 351                 }
 352         }
 353
 354 err_ret:
 355         return ret;
 356 }
 357 EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info);
 358
 359 #ifdef CONFIG_PM
 360 static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message)
 361 {
 362         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
 363         struct hid_sensor_hub_callbacks_list *callback;
 364
 365         hid_dbg(hdev, " sensor_hub_suspend\n");
 366         spin_lock(&pdata->dyn_callback_lock);
 367         list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
 368                 if (callback->usage_callback->suspend)
 369                         callback->usage_callback->suspend(
 370                                         pdata->hsdev, callback->priv);
 371         }
 372         spin_unlock(&pdata->dyn_callback_lock);
 373
 374         return 0;
 375 }
 376
 377 static int sensor_hub_resume(struct hid_device *hdev)
 378 {
 379         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
 380         struct hid_sensor_hub_callbacks_list *callback;
 381
 382         hid_dbg(hdev, " sensor_hub_resume\n");
 383         spin_lock(&pdata->dyn_callback_lock);
 384         list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
 385                 if (callback->usage_callback->resume)
 386                         callback->usage_callback->resume(
 387                                         pdata->hsdev, callback->priv);
 388         }
 389         spin_unlock(&pdata->dyn_callback_lock);
 390
 391         return 0;
 392 }
 393
 394 static int sensor_hub_reset_resume(struct hid_device *hdev)
 395 {
 396         return 0;
 397 }
 398 #endif
 399
 400 /*
 401  * Handle raw report as sent by device
 402  */
 403 static int sensor_hub_raw_event(struct hid_device *hdev,
 404                 struct hid_report *report, u8 *raw_data, int size)
 405 {
 406         int i;
 407         u8 *ptr;
 408         int sz;
 409         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
 410         unsigned long flags;
 411         struct hid_sensor_hub_callbacks *callback = NULL;
 412         struct hid_collection *collection = NULL;
 413         void *priv = NULL;
 414
 415         hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n",
 416                          report->id, size, report->type);
 417         hid_dbg(hdev, "maxfield:%d\n", report->maxfield);
 418         if (report->type != HID_INPUT_REPORT)
 419                 return 1;
 420
 421         ptr = raw_data;
 422         ptr++; /* Skip report id */
 423
 424         spin_lock_irqsave(&pdata->lock, flags);
 425
 426         for (i = 0; i < report->maxfield; ++i) {
 427                 hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n",
 428                                 i, report->field[i]->usage->collection_index,
 429                                 report->field[i]->usage->hid,
 430                                 (report->field[i]->report_size *
 431                                         report->field[i]->report_count)/8);
 432                 sz = (report->field[i]->report_size *
 433                                         report->field[i]->report_count)/8;
 434                 if (pdata->pending.status && pdata->pending.attr_usage_id ==
 435                                 report->field[i]->usage->hid) {
 436                         hid_dbg(hdev, "data was pending ...\n");
 437                         pdata->pending.raw_data = kmemdup(ptr, sz, GFP_ATOMIC);
 438                         if (pdata->pending.raw_data)
 439                                 pdata->pending.raw_size = sz;
 440                         else
 441                                 pdata->pending.raw_size = 0;
 442                         complete(&pdata->pending.ready);
 443                 }
 444                 collection = &hdev->collection[
 445                                 report->field[i]->usage->collection_index];
 446                 hid_dbg(hdev, "collection->usage %x\n",
 447                                         collection->usage);
 448                 callback = sensor_hub_get_callback(pdata->hsdev->hdev,
 449                                                 report->field[i]->physical,
 450                                                         &priv);
 451                 if (callback && callback->capture_sample) {
 452                         if (report->field[i]->logical)
 453                                 callback->capture_sample(pdata->hsdev,
 454                                         report->field[i]->logical, sz, ptr,
 455                                         callback->pdev);
 456                         else
 457                                 callback->capture_sample(pdata->hsdev,
 458                                         report->field[i]->usage->hid, sz, ptr,
 459                                         callback->pdev);
 460                 }
 461                 ptr += sz;
 462         }
 463         if (callback && collection && callback->send_event)
 464                 callback->send_event(pdata->hsdev, collection->usage,
 465                                 callback->pdev);
 466         spin_unlock_irqrestore(&pdata->lock, flags);
 467
 468         return 1;
 469 }
 470
 471 static int sensor_hub_probe(struct hid_device *hdev,
 472                                 const struct hid_device_id *id)
 473 {
 474         int ret;
 475         struct sensor_hub_data *sd;
 476         int i;
 477         char *name;
 478         struct hid_report *report;
 479         struct hid_report_enum *report_enum;
 480         struct hid_field *field;
 481         int dev_cnt;
 482
 483         sd = devm_kzalloc(&hdev->dev, sizeof(*sd), GFP_KERNEL);
 484         if (!sd) {
 485                 hid_err(hdev, "cannot allocate Sensor data\n");
 486                 return -ENOMEM;
 487         }
 488         sd->hsdev = devm_kzalloc(&hdev->dev, sizeof(*sd->hsdev), GFP_KERNEL);
 489         if (!sd->hsdev) {
 490                 hid_err(hdev, "cannot allocate hid_sensor_hub_device\n");
 491                 return -ENOMEM;
 492         }
 493         hid_set_drvdata(hdev, sd);
 494         sd->hsdev->hdev = hdev;
 495         sd->hsdev->vendor_id = hdev->vendor;
 496         sd->hsdev->product_id = hdev->product;
 497         spin_lock_init(&sd->lock);
 498         spin_lock_init(&sd->dyn_callback_lock);
 499         mutex_init(&sd->mutex);
 500         ret = hid_parse(hdev);
 501         if (ret) {
 502                 hid_err(hdev, "parse failed\n");
 503                 return ret;
 504         }
 505         INIT_LIST_HEAD(&hdev->inputs);
 506
 507         ret = hid_hw_start(hdev, 0);
 508         if (ret) {
 509                 hid_err(hdev, "hw start failed\n");
 510                 return ret;
 511         }
 512         ret = hid_hw_open(hdev);
 513         if (ret) {
 514                 hid_err(hdev, "failed to open input interrupt pipe\n");
 515                 goto err_stop_hw;
 516         }
 517
 518         INIT_LIST_HEAD(&sd->dyn_callback_list);
 519         sd->hid_sensor_client_cnt = 0;
 520         report_enum = &hdev->report_enum[HID_INPUT_REPORT];
 521
 522         dev_cnt = sensor_hub_get_physical_device_count(report_enum);
 523         if (dev_cnt > HID_MAX_PHY_DEVICES) {
 524                 hid_err(hdev, "Invalid Physical device count\n");
 525                 ret = -EINVAL;
 526                 goto err_close;
 527         }
 528         sd->hid_sensor_hub_client_devs = kzalloc(dev_cnt *
 529                                                 sizeof(struct mfd_cell),
 530                                                 GFP_KERNEL);
 531         if (sd->hid_sensor_hub_client_devs == NULL) {
 532                 hid_err(hdev, "Failed to allocate memory for mfd cells\n");
 533                         ret = -ENOMEM;
 534                         goto err_close;
 535         }
 536         list_for_each_entry(report, &report_enum->report_list, list) {
 537                 hid_dbg(hdev, "Report id:%x\n", report->id);
 538                 field = report->field[0];
 539                 if (report->maxfield && field &&
 540                                         field->physical) {
 541                         name = kasprintf(GFP_KERNEL, "HID-SENSOR-%x",
 542                                                 field->physical);
 543                         if (name == NULL) {
 544                                 hid_err(hdev, "Failed MFD device name\n");
 545                                         ret = -ENOMEM;
 546                                         goto err_free_names;
 547                         }
 548                         sd->hid_sensor_hub_client_devs[
 549                                 sd->hid_sensor_client_cnt].name = name;
 550                         sd->hid_sensor_hub_client_devs[
 551                                 sd->hid_sensor_client_cnt].platform_data =
 552                                                 sd->hsdev;
 553                         sd->hid_sensor_hub_client_devs[
 554                                 sd->hid_sensor_client_cnt].pdata_size =
 555                                                 sizeof(*sd->hsdev);
 556                         hid_dbg(hdev, "Adding %s:%p\n", name, sd);
 557                         sd->hid_sensor_client_cnt++;
 558                 }
 559         }
 560         ret = mfd_add_devices(&hdev->dev, 0, sd->hid_sensor_hub_client_devs,
 561                 sd->hid_sensor_client_cnt, NULL, 0, NULL);
 562         if (ret < 0)
 563                 goto err_free_names;
 564
 565         return ret;
 566
 567 err_free_names:
 568         for (i = 0; i < sd->hid_sensor_client_cnt ; ++i)
 569                 kfree(sd->hid_sensor_hub_client_devs[i].name);
 570         kfree(sd->hid_sensor_hub_client_devs);
 571 err_close:
 572         hid_hw_close(hdev);
 573 err_stop_hw:
 574         hid_hw_stop(hdev);
 575
 576         return ret;
 577 }
 578
 579 static void sensor_hub_remove(struct hid_device *hdev)
 580 {
 581         struct sensor_hub_data *data = hid_get_drvdata(hdev);
 582         unsigned long flags;
 583         int i;
 584
 585         hid_dbg(hdev, " hardware removed\n");
 586         hid_hw_close(hdev);
 587         hid_hw_stop(hdev);
 588         spin_lock_irqsave(&data->lock, flags);
 589         if (data->pending.status)
 590                 complete(&data->pending.ready);
 591         spin_unlock_irqrestore(&data->lock, flags);
 592         mfd_remove_devices(&hdev->dev);
 593         for (i = 0; i < data->hid_sensor_client_cnt ; ++i)
 594                 kfree(data->hid_sensor_hub_client_devs[i].name);
 595         kfree(data->hid_sensor_hub_client_devs);
 596         hid_set_drvdata(hdev, NULL);
 597         mutex_destroy(&data->mutex);
 598 }
 599
 600 static const struct hid_device_id sensor_hub_devices[] = {
 601         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID,
 602                      HID_ANY_ID) },
 603         { }
 604 };
 605 MODULE_DEVICE_TABLE(hid, sensor_hub_devices);
 606
 607 static struct hid_driver sensor_hub_driver = {
 608         .name = "hid-sensor-hub",
 609         .id_table = sensor_hub_devices,
 610         .probe = sensor_hub_probe,
 611         .remove = sensor_hub_remove,
 612         .raw_event = sensor_hub_raw_event,
 613 #ifdef CONFIG_PM
 614         .suspend = sensor_hub_suspend,
 615         .resume = sensor_hub_resume,
 616         .reset_resume = sensor_hub_reset_resume,
 617 #endif
 618 };
 619 module_hid_driver(sensor_hub_driver);
 620
 621 MODULE_DESCRIPTION("HID Sensor Hub driver");
 622 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
 623 MODULE_LICENSE("GPL");