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 "usbhid/usbhid.h"
  22 #include <linux/module.h>
  23 #include <linux/slab.h>
  24 #include <linux/mfd/core.h>
  25 #include <linux/list.h>
  26 #include <linux/hid-sensor-ids.h>
  27 #include <linux/hid-sensor-hub.h>
  28 #include "hid-ids.h"
  29
  30 /**
  31  * struct sensor_hub_pending - Synchronous read pending information
  32  * @status:             Pending status true/false.
  33  * @ready:              Completion synchronization data.
  34  * @usage_id:           Usage id for physical device, E.g. Gyro usage id.
  35  * @attr_usage_id:      Usage Id of a field, E.g. X-AXIS for a gyro.
  36  * @raw_size:           Response size for a read request.
  37  * @raw_data:           Place holder for received response.
  38  */
  39 struct sensor_hub_pending {
  40         bool status;
  41         struct completion ready;
  42         u32 usage_id;
  43         u32 attr_usage_id;
  44         int raw_size;
  45         u8  *raw_data;
  46 };
  47
  48 /**
  49  * struct sensor_hub_data - Hold a instance data for a HID hub device
  50  * @hsdev:              Stored hid instance for current hub device.
  51  * @mutex:              Mutex to serialize synchronous request.
  52  * @lock:               Spin lock to protect pending request structure.
  53  * @pending:            Holds information of pending sync read request.
  54  * @dyn_callback_list:  Holds callback function
  55  * @dyn_callback_lock:  spin lock to protect callback list
  56  * @hid_sensor_hub_client_devs: Stores all MFD cells for a hub instance.
  57  * @hid_sensor_client_cnt: Number of MFD cells, (no of sensors attached).
  58  */
  59 struct sensor_hub_data {
  60         struct hid_sensor_hub_device *hsdev;
  61         struct mutex mutex;
  62         spinlock_t lock;
  63         struct sensor_hub_pending pending;
  64         struct list_head dyn_callback_list;
  65         spinlock_t dyn_callback_lock;
  66         struct mfd_cell *hid_sensor_hub_client_devs;
  67         int hid_sensor_client_cnt;
  68 };
  69
  70 /**
  71  * struct hid_sensor_hub_callbacks_list - Stores callback list
  72  * @list:               list head.
  73  * @usage_id:           usage id for a physical device.
  74  * @usage_callback:     Stores registered callback functions.
  75  * @priv:               Private data for a physical device.
  76  */
  77 struct hid_sensor_hub_callbacks_list {
  78         struct list_head list;
  79         u32 usage_id;
  80         struct hid_sensor_hub_callbacks *usage_callback;
  81         void *priv;
  82 };
  83
  84 static struct hid_report *sensor_hub_report(int id, struct hid_device *hdev,
  85                                                 int dir)
  86 {
  87         struct hid_report *report;
  88
  89         list_for_each_entry(report, &hdev->report_enum[dir].report_list, list) {
  90                 if (report->id == id)
  91                         return report;
  92         }
  93         hid_warn(hdev, "No report with id 0x%x found\n", id);
  94
  95         return NULL;
  96 }
  97
  98 static int sensor_hub_get_physical_device_count(
  99                                 struct hid_report_enum *report_enum)
 100 {
 101         struct hid_report *report;
 102         struct hid_field *field;
 103         int cnt = 0;
 104
 105         list_for_each_entry(report, &report_enum->report_list, list) {
 106                 field = report->field[0];
 107                 if (report->maxfield && field &&
 108                                         field->physical)
 109                         cnt++;
 110         }
 111
 112         return cnt;
 113 }
 114
 115 static void sensor_hub_fill_attr_info(
 116                 struct hid_sensor_hub_attribute_info *info,
 117                 s32 index, s32 report_id, s32 units, s32 unit_expo, s32 size)
 118 {
 119         info->index = index;
 120         info->report_id = report_id;
 121         info->units = units;
 122         info->unit_expo = unit_expo;
 123         info->size = size/8;
 124 }
 125
 126 static struct hid_sensor_hub_callbacks *sensor_hub_get_callback(
 127                                         struct hid_device *hdev,
 128                                         u32 usage_id, void **priv)
 129 {
 130         struct hid_sensor_hub_callbacks_list *callback;
 131         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
 132
 133         spin_lock(&pdata->dyn_callback_lock);
 134         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
 135                 if (callback->usage_id == usage_id) {
 136                         *priv = callback->priv;
 137                         spin_unlock(&pdata->dyn_callback_lock);
 138                         return callback->usage_callback;
 139                 }
 140         spin_unlock(&pdata->dyn_callback_lock);
 141
 142         return NULL;
 143 }
 144
 145 int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev,
 146                         u32 usage_id,
 147                         struct hid_sensor_hub_callbacks *usage_callback)
 148 {
 149         struct hid_sensor_hub_callbacks_list *callback;
 150         struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
 151
 152         spin_lock(&pdata->dyn_callback_lock);
 153         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
 154                 if (callback->usage_id == usage_id) {
 155                         spin_unlock(&pdata->dyn_callback_lock);
 156                         return -EINVAL;
 157                 }
 158         callback = kzalloc(sizeof(*callback), GFP_ATOMIC);
 159         if (!callback) {
 160                 spin_unlock(&pdata->dyn_callback_lock);
 161                 return -ENOMEM;
 162         }
 163         callback->usage_callback = usage_callback;
 164         callback->usage_id = usage_id;
 165         callback->priv = NULL;
 166         list_add_tail(&callback->list, &pdata->dyn_callback_list);
 167         spin_unlock(&pdata->dyn_callback_lock);
 168
 169         return 0;
 170 }
 171 EXPORT_SYMBOL_GPL(sensor_hub_register_callback);
 172
 173 int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev,
 174                                 u32 usage_id)
 175 {
 176         struct hid_sensor_hub_callbacks_list *callback;
 177         struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
 178
 179         spin_lock(&pdata->dyn_callback_lock);
 180         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
 181                 if (callback->usage_id == usage_id) {
 182                         list_del(&callback->list);
 183                         kfree(callback);
 184                         break;
 185                 }
 186         spin_unlock(&pdata->dyn_callback_lock);
 187
 188         return 0;
 189 }
 190 EXPORT_SYMBOL_GPL(sensor_hub_remove_callback);
 191
 192 int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
 193                                 u32 field_index, s32 value)
 194 {
 195         struct hid_report *report;
 196         struct sensor_hub_data *data =  hid_get_drvdata(hsdev->hdev);
 197         int ret = 0;
 198
 199         mutex_lock(&data->mutex);
 200         report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
 201         if (!report || (field_index >=  report->maxfield)) {
 202                 ret = -EINVAL;
 203                 goto done_proc;
 204         }
 205         hid_set_field(report->field[field_index], 0, value);
 206         hid_hw_request(hsdev->hdev, report, HID_REQ_SET_REPORT);
 207         usbhid_wait_io(hsdev->hdev);
 208
 209 done_proc:
 210         mutex_unlock(&data->mutex);
 211
 212         return ret;
 213 }
 214 EXPORT_SYMBOL_GPL(sensor_hub_set_feature);
 215
 216 int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
 217                                 u32 field_index, s32 *value)
 218 {
 219         struct hid_report *report;
 220         struct sensor_hub_data *data =  hid_get_drvdata(hsdev->hdev);
 221         int ret = 0;
 222
 223         mutex_lock(&data->mutex);
 224         report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
 225         if (!report || (field_index >=  report->maxfield)) {
 226                 ret = -EINVAL;
 227                 goto done_proc;
 228         }
 229         hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
 230         usbhid_wait_io(hsdev->hdev);
 231         *value = report->field[field_index]->value[0];
 232
 233 done_proc:
 234         mutex_unlock(&data->mutex);
 235
 236         return ret;
 237 }
 238 EXPORT_SYMBOL_GPL(sensor_hub_get_feature);
 239
 240
 241 int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev,
 242                                         u32 usage_id,
 243                                         u32 attr_usage_id, u32 report_id)
 244 {
 245         struct sensor_hub_data *data =  hid_get_drvdata(hsdev->hdev);
 246         unsigned long flags;
 247         struct hid_report *report;
 248         int ret_val = 0;
 249
 250         mutex_lock(&data->mutex);
 251         memset(&data->pending, 0, sizeof(data->pending));
 252         init_completion(&data->pending.ready);
 253         data->pending.usage_id = usage_id;
 254         data->pending.attr_usage_id = attr_usage_id;
 255         data->pending.raw_size = 0;
 256
 257         spin_lock_irqsave(&data->lock, flags);
 258         data->pending.status = true;
 259         report = sensor_hub_report(report_id, hsdev->hdev, HID_INPUT_REPORT);
 260         if (!report) {
 261                 spin_unlock_irqrestore(&data->lock, flags);
 262                 goto err_free;
 263         }
 264         hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
 265         spin_unlock_irqrestore(&data->lock, flags);
 266         wait_for_completion_interruptible_timeout(&data->pending.ready, HZ*5);
 267         switch (data->pending.raw_size) {
 268         case 1:
 269                 ret_val = *(u8 *)data->pending.raw_data;
 270                 break;
 271         case 2:
 272                 ret_val = *(u16 *)data->pending.raw_data;
 273                 break;
 274         case 4:
 275                 ret_val = *(u32 *)data->pending.raw_data;
 276                 break;
 277         default:
 278                 ret_val = 0;
 279         }
 280         kfree(data->pending.raw_data);
 281
 282 err_free:
 283         data->pending.status = false;
 284         mutex_unlock(&data->mutex);
 285
 286         return ret_val;
 287 }
 288 EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value);
 289
 290 int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev,
 291                                 u8 type,
 292                                 u32 usage_id,
 293                                 u32 attr_usage_id,
 294                                 struct hid_sensor_hub_attribute_info *info)
 295 {
 296         int ret = -1;
 297         int i, j;
 298         int collection_index = -1;
 299         struct hid_report *report;
 300         struct hid_field *field;
 301         struct hid_report_enum *report_enum;
 302         struct hid_device *hdev = hsdev->hdev;
 303
 304         /* Initialize with defaults */
 305         info->usage_id = usage_id;
 306         info->attrib_id =  attr_usage_id;
 307         info->report_id = -1;
 308         info->index = -1;
 309         info->units = -1;
 310         info->unit_expo = -1;
 311
 312         for (i = 0; i < hdev->maxcollection; ++i) {
 313                 struct hid_collection *collection = &hdev->collection[i];
 314                 if (usage_id == collection->usage) {
 315                         collection_index = i;
 316                         break;
 317                 }
 318         }
 319         if (collection_index == -1)
 320                 goto err_ret;
 321
 322         report_enum = &hdev->report_enum[type];
 323         list_for_each_entry(report, &report_enum->report_list, list) {
 324                 for (i = 0; i < report->maxfield; ++i) {
 325                         field = report->field[i];
 326                         if (field->physical == usage_id &&
 327                                 field->logical == attr_usage_id) {
 328                                 sensor_hub_fill_attr_info(info, i, report->id,
 329                                         field->unit, field->unit_exponent,
 330                                         field->report_size);
 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                                                 ret = 0;
 344                                                 break;
 345                                         }
 346                                 }
 347                         }
 348                         if (ret == 0)
 349                                 break;
 350                 }
 351         }
 352
 353 err_ret:
 354         return ret;
 355 }
 356 EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info);
 357
 358 #ifdef CONFIG_PM
 359 static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message)
 360 {
 361         struct sensor_hub_data *pdata =  hid_get_drvdata(hdev);
 362         struct hid_sensor_hub_callbacks_list *callback;
 363
 364         hid_dbg(hdev, " sensor_hub_suspend\n");
 365         spin_lock(&pdata->dyn_callback_lock);
 366         list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
 367                 if (callback->usage_callback->suspend)
 368                         callback->usage_callback->suspend(
 369                                         pdata->hsdev, callback->priv);
 370         }
 371         spin_unlock(&pdata->dyn_callback_lock);
 372
 373         return 0;
 374 }
 375
 376 static int sensor_hub_resume(struct hid_device *hdev)
 377 {
 378         struct sensor_hub_data *pdata =  hid_get_drvdata(hdev);
 379         struct hid_sensor_hub_callbacks_list *callback;
 380
 381         hid_dbg(hdev, " sensor_hub_resume\n");
 382         spin_lock(&pdata->dyn_callback_lock);
 383         list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
 384                 if (callback->usage_callback->resume)
 385                         callback->usage_callback->resume(
 386                                         pdata->hsdev, callback->priv);
 387         }
 388         spin_unlock(&pdata->dyn_callback_lock);
 389
 390         return 0;
 391 }
 392
 393 static int sensor_hub_reset_resume(struct hid_device *hdev)
 394 {
 395         return 0;
 396 }
 397 #endif
 398 /*
 399  * Handle raw report as sent by device
 400  */
 401 static int sensor_hub_raw_event(struct hid_device *hdev,
 402                 struct hid_report *report, u8 *raw_data, int size)
 403 {
 404         int i;
 405         u8 *ptr;
 406         int sz;
 407         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
 408         unsigned long flags;
 409         struct hid_sensor_hub_callbacks *callback = NULL;
 410         struct hid_collection *collection = NULL;
 411         void *priv = NULL;
 412
 413         hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n",
 414                          report->id, size, report->type);
 415         hid_dbg(hdev, "maxfield:%d\n", report->maxfield);
 416         if (report->type != HID_INPUT_REPORT)
 417                 return 1;
 418
 419         ptr = raw_data;
 420         ptr++; /*Skip report id*/
 421
 422         spin_lock_irqsave(&pdata->lock, flags);
 423
 424         for (i = 0; i < report->maxfield; ++i) {
 425
 426                 hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n",
 427                                 i, report->field[i]->usage->collection_index,
 428                                 report->field[i]->usage->hid,
 429                                 report->field[i]->report_size/8);
 430
 431                 sz = report->field[i]->report_size/8;
 432                 if (pdata->pending.status && pdata->pending.attr_usage_id ==
 433                                 report->field[i]->usage->hid) {
 434                         hid_dbg(hdev, "data was pending ...\n");
 435                         pdata->pending.raw_data = kmalloc(sz, GFP_ATOMIC);
 436                         if (pdata->pending.raw_data) {
 437                                 memcpy(pdata->pending.raw_data, ptr, sz);
 438                                 pdata->pending.raw_size  = sz;
 439                         } else
 440                                 pdata->pending.raw_size = 0;
 441                         complete(&pdata->pending.ready);
 442                 }
 443                 collection = &hdev->collection[
 444                                 report->field[i]->usage->collection_index];
 445                 hid_dbg(hdev, "collection->usage %x\n",
 446                                         collection->usage);
 447                 callback = sensor_hub_get_callback(pdata->hsdev->hdev,
 448                                                 report->field[i]->physical,
 449                                                         &priv);
 450                 if (callback && callback->capture_sample) {
 451                         if (report->field[i]->logical)
 452                                 callback->capture_sample(pdata->hsdev,
 453                                         report->field[i]->logical, sz, ptr,
 454                                         callback->pdev);
 455                         else
 456                                 callback->capture_sample(pdata->hsdev,
 457                                         report->field[i]->usage->hid, sz, ptr,
 458                                         callback->pdev);
 459                 }
 460                 ptr += sz;
 461         }
 462         if (callback && collection && callback->send_event)
 463                 callback->send_event(pdata->hsdev, collection->usage,
 464                                 callback->pdev);
 465         spin_unlock_irqrestore(&pdata->lock, flags);
 466
 467         return 1;
 468 }
 469
 470 static int sensor_hub_probe(struct hid_device *hdev,
 471                                 const struct hid_device_id *id)
 472 {
 473         int ret;
 474         struct sensor_hub_data *sd;
 475         int i;
 476         char *name;
 477         struct hid_report *report;
 478         struct hid_report_enum *report_enum;
 479         struct hid_field *field;
 480         int dev_cnt;
 481
 482         sd = kzalloc(sizeof(struct sensor_hub_data), GFP_KERNEL);
 483         if (!sd) {
 484                 hid_err(hdev, "cannot allocate Sensor data\n");
 485                 return -ENOMEM;
 486         }
 487         sd->hsdev = kzalloc(sizeof(struct hid_sensor_hub_device), GFP_KERNEL);
 488         if (!sd->hsdev) {
 489                 hid_err(hdev, "cannot allocate hid_sensor_hub_device\n");
 490                 ret = -ENOMEM;
 491                 goto err_free_hub;
 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                 goto err_free;
 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                 goto err_free;
 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 err_free:
 576         kfree(sd->hsdev);
 577 err_free_hub:
 578         kfree(sd);
 579
 580         return ret;
 581 }
 582
 583 static void sensor_hub_remove(struct hid_device *hdev)
 584 {
 585         struct sensor_hub_data *data = hid_get_drvdata(hdev);
 586         unsigned long flags;
 587         int i;
 588
 589         hid_dbg(hdev, " hardware removed\n");
 590         hid_hw_close(hdev);
 591         hid_hw_stop(hdev);
 592         spin_lock_irqsave(&data->lock, flags);
 593         if (data->pending.status)
 594                 complete(&data->pending.ready);
 595         spin_unlock_irqrestore(&data->lock, flags);
 596         mfd_remove_devices(&hdev->dev);
 597         for (i = 0; i < data->hid_sensor_client_cnt ; ++i)
 598                 kfree(data->hid_sensor_hub_client_devs[i].name);
 599         kfree(data->hid_sensor_hub_client_devs);
 600         hid_set_drvdata(hdev, NULL);
 601         mutex_destroy(&data->mutex);
 602         kfree(data->hsdev);
 603         kfree(data);
 604 }
 605
 606 static const struct hid_device_id sensor_hub_devices[] = {
 607         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID,
 608                      HID_ANY_ID) },
 609         { }
 610 };
 611 MODULE_DEVICE_TABLE(hid, sensor_hub_devices);
 612
 613 static struct hid_driver sensor_hub_driver = {
 614         .name = "hid-sensor-hub",
 615         .id_table = sensor_hub_devices,
 616         .probe = sensor_hub_probe,
 617         .remove = sensor_hub_remove,
 618         .raw_event = sensor_hub_raw_event,
 619 #ifdef CONFIG_PM
 620         .suspend = sensor_hub_suspend,
 621         .resume =  sensor_hub_resume,
 622         .reset_resume =  sensor_hub_reset_resume,
 623 #endif
 624 };
 625 module_hid_driver(sensor_hub_driver);
 626
 627 MODULE_DESCRIPTION("HID Sensor Hub driver");
 628 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
 629 MODULE_LICENSE("GPL");