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/usb.h>
  22 #include "usbhid/usbhid.h"
  23 #include <linux/module.h>
  24 #include <linux/slab.h>
  25 #include <linux/mfd/core.h>
  26 #include <linux/list.h>
  27 #include <linux/hid-sensor-ids.h>
  28 #include <linux/hid-sensor-hub.h>
  29 #include "hid-ids.h"
  30
  31 /**
  32  * struct sensor_hub_pending - Synchronous read pending information
  33  * @status:             Pending status true/false.
  34  * @ready:              Completion synchronization data.
  35  * @usage_id:           Usage id for physical device, E.g. Gyro usage id.
  36  * @attr_usage_id:      Usage Id of a field, E.g. X-AXIS for a gyro.
  37  * @raw_size:           Response size for a read request.
  38  * @raw_data:           Place holder for received response.
  39  */
  40 struct sensor_hub_pending {
  41         bool status;
  42         struct completion ready;
  43         u32 usage_id;
  44         u32 attr_usage_id;
  45         int raw_size;
  46         u8  *raw_data;
  47 };
  48
  49 /**
  50  * struct sensor_hub_data - Hold a instance data for a HID hub device
  51  * @hsdev:              Stored hid instance for current hub device.
  52  * @mutex:              Mutex to serialize synchronous request.
  53  * @lock:               Spin lock to protect pending request structure.
  54  * @pending:            Holds information of pending sync read request.
  55  * @dyn_callback_list:  Holds callback function
  56  * @dyn_callback_lock:  spin lock to protect callback list
  57  * @hid_sensor_hub_client_devs: Stores all MFD cells for a hub instance.
  58  * @hid_sensor_client_cnt: Number of MFD cells, (no of sensors attached).
  59  */
  60 struct sensor_hub_data {
  61         struct hid_sensor_hub_device *hsdev;
  62         struct mutex mutex;
  63         spinlock_t lock;
  64         struct sensor_hub_pending pending;
  65         struct list_head dyn_callback_list;
  66         spinlock_t dyn_callback_lock;
  67         struct mfd_cell *hid_sensor_hub_client_devs;
  68         int hid_sensor_client_cnt;
  69 };
  70
  71 /**
  72  * struct hid_sensor_hub_callbacks_list - Stores callback list
  73  * @list:               list head.
  74  * @usage_id:           usage id for a physical device.
  75  * @usage_callback:     Stores registered callback functions.
  76  * @priv:               Private data for a physical device.
  77  */
  78 struct hid_sensor_hub_callbacks_list {
  79         struct list_head list;
  80         u32 usage_id;
  81         struct hid_sensor_hub_callbacks *usage_callback;
  82         void *priv;
  83 };
  84
  85 static struct hid_report *sensor_hub_report(int id, struct hid_device *hdev,
  86                                                 int dir)
  87 {
  88         struct hid_report *report;
  89
  90         list_for_each_entry(report, &hdev->report_enum[dir].report_list, list) {
  91                 if (report->id == id)
  92                         return report;
  93         }
  94         hid_warn(hdev, "No report with id 0x%x found\n", id);
  95
  96         return NULL;
  97 }
  98
  99 static int sensor_hub_get_physical_device_count(
 100                                 struct hid_report_enum *report_enum)
 101 {
 102         struct hid_report *report;
 103         struct hid_field *field;
 104         int cnt = 0;
 105
 106         list_for_each_entry(report, &report_enum->report_list, list) {
 107                 field = report->field[0];
 108                 if (report->maxfield && field &&
 109                                         field->physical)
 110                         cnt++;
 111         }
 112
 113         return cnt;
 114 }
 115
 116 static void sensor_hub_fill_attr_info(
 117                 struct hid_sensor_hub_attribute_info *info,
 118                 s32 index, s32 report_id, s32 units, s32 unit_expo, s32 size)
 119 {
 120         info->index = index;
 121         info->report_id = report_id;
 122         info->units = units;
 123         info->unit_expo = unit_expo;
 124         info->size = size/8;
 125 }
 126
 127 static struct hid_sensor_hub_callbacks *sensor_hub_get_callback(
 128                                         struct hid_device *hdev,
 129                                         u32 usage_id, void **priv)
 130 {
 131         struct hid_sensor_hub_callbacks_list *callback;
 132         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
 133
 134         spin_lock(&pdata->dyn_callback_lock);
 135         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
 136                 if (callback->usage_id == usage_id) {
 137                         *priv = callback->priv;
 138                         spin_unlock(&pdata->dyn_callback_lock);
 139                         return callback->usage_callback;
 140                 }
 141         spin_unlock(&pdata->dyn_callback_lock);
 142
 143         return NULL;
 144 }
 145
 146 int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev,
 147                         u32 usage_id,
 148                         struct hid_sensor_hub_callbacks *usage_callback)
 149 {
 150         struct hid_sensor_hub_callbacks_list *callback;
 151         struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
 152
 153         spin_lock(&pdata->dyn_callback_lock);
 154         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
 155                 if (callback->usage_id == usage_id) {
 156                         spin_unlock(&pdata->dyn_callback_lock);
 157                         return -EINVAL;
 158                 }
 159         callback = kzalloc(sizeof(*callback), GFP_ATOMIC);
 160         if (!callback) {
 161                 spin_unlock(&pdata->dyn_callback_lock);
 162                 return -ENOMEM;
 163         }
 164         callback->usage_callback = usage_callback;
 165         callback->usage_id = usage_id;
 166         callback->priv = NULL;
 167         list_add_tail(&callback->list, &pdata->dyn_callback_list);
 168         spin_unlock(&pdata->dyn_callback_lock);
 169
 170         return 0;
 171 }
 172 EXPORT_SYMBOL_GPL(sensor_hub_register_callback);
 173
 174 int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev,
 175                                 u32 usage_id)
 176 {
 177         struct hid_sensor_hub_callbacks_list *callback;
 178         struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
 179
 180         spin_lock(&pdata->dyn_callback_lock);
 181         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
 182                 if (callback->usage_id == usage_id) {
 183                         list_del(&callback->list);
 184                         kfree(callback);
 185                         break;
 186                 }
 187         spin_unlock(&pdata->dyn_callback_lock);
 188
 189         return 0;
 190 }
 191 EXPORT_SYMBOL_GPL(sensor_hub_remove_callback);
 192
 193 int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
 194                                 u32 field_index, s32 value)
 195 {
 196         struct hid_report *report;
 197         struct sensor_hub_data *data =  hid_get_drvdata(hsdev->hdev);
 198         int ret = 0;
 199
 200         mutex_lock(&data->mutex);
 201         report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
 202         if (!report || (field_index >=  report->maxfield)) {
 203                 ret = -EINVAL;
 204                 goto done_proc;
 205         }
 206         hid_set_field(report->field[field_index], 0, value);
 207         usbhid_submit_report(hsdev->hdev, report, USB_DIR_OUT);
 208         usbhid_wait_io(hsdev->hdev);
 209
 210 done_proc:
 211         mutex_unlock(&data->mutex);
 212
 213         return ret;
 214 }
 215 EXPORT_SYMBOL_GPL(sensor_hub_set_feature);
 216
 217 int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
 218                                 u32 field_index, s32 *value)
 219 {
 220         struct hid_report *report;
 221         struct sensor_hub_data *data =  hid_get_drvdata(hsdev->hdev);
 222         int ret = 0;
 223
 224         mutex_lock(&data->mutex);
 225         report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
 226         if (!report || (field_index >=  report->maxfield)) {
 227                 ret = -EINVAL;
 228                 goto done_proc;
 229         }
 230         usbhid_submit_report(hsdev->hdev, report, USB_DIR_IN);
 231         usbhid_wait_io(hsdev->hdev);
 232         *value = report->field[field_index]->value[0];
 233
 234 done_proc:
 235         mutex_unlock(&data->mutex);
 236
 237         return ret;
 238 }
 239 EXPORT_SYMBOL_GPL(sensor_hub_get_feature);
 240
 241
 242 int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev,
 243                                         u32 usage_id,
 244                                         u32 attr_usage_id, u32 report_id)
 245 {
 246         struct sensor_hub_data *data =  hid_get_drvdata(hsdev->hdev);
 247         unsigned long flags;
 248         struct hid_report *report;
 249         int ret_val = 0;
 250
 251         mutex_lock(&data->mutex);
 252         memset(&data->pending, 0, sizeof(data->pending));
 253         init_completion(&data->pending.ready);
 254         data->pending.usage_id = usage_id;
 255         data->pending.attr_usage_id = attr_usage_id;
 256         data->pending.raw_size = 0;
 257
 258         spin_lock_irqsave(&data->lock, flags);
 259         data->pending.status = true;
 260         report = sensor_hub_report(report_id, hsdev->hdev, HID_INPUT_REPORT);
 261         if (!report) {
 262                 spin_unlock_irqrestore(&data->lock, flags);
 263                 goto err_free;
 264         }
 265         usbhid_submit_report(hsdev->hdev, report, USB_DIR_IN);
 266         spin_unlock_irqrestore(&data->lock, flags);
 267         wait_for_completion_interruptible_timeout(&data->pending.ready, HZ*5);
 268         switch (data->pending.raw_size) {
 269         case 1:
 270                 ret_val = *(u8 *)data->pending.raw_data;
 271                 break;
 272         case 2:
 273                 ret_val = *(u16 *)data->pending.raw_data;
 274                 break;
 275         case 4:
 276                 ret_val = *(u32 *)data->pending.raw_data;
 277                 break;
 278         default:
 279                 ret_val = 0;
 280         }
 281         kfree(data->pending.raw_data);
 282
 283 err_free:
 284         data->pending.status = false;
 285         mutex_unlock(&data->mutex);
 286
 287         return ret_val;
 288 }
 289 EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value);
 290
 291 int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev,
 292                                 u8 type,
 293                                 u32 usage_id,
 294                                 u32 attr_usage_id,
 295                                 struct hid_sensor_hub_attribute_info *info)
 296 {
 297         int ret = -1;
 298         int i, j;
 299         int collection_index = -1;
 300         struct hid_report *report;
 301         struct hid_field *field;
 302         struct hid_report_enum *report_enum;
 303         struct hid_device *hdev = hsdev->hdev;
 304
 305         /* Initialize with defaults */
 306         info->usage_id = usage_id;
 307         info->attrib_id =  attr_usage_id;
 308         info->report_id = -1;
 309         info->index = -1;
 310         info->units = -1;
 311         info->unit_expo = -1;
 312
 313         for (i = 0; i < hdev->maxcollection; ++i) {
 314                 struct hid_collection *collection = &hdev->collection[i];
 315                 if (usage_id == collection->usage) {
 316                         collection_index = i;
 317                         break;
 318                 }
 319         }
 320         if (collection_index == -1)
 321                 goto err_ret;
 322
 323         report_enum = &hdev->report_enum[type];
 324         list_for_each_entry(report, &report_enum->report_list, list) {
 325                 for (i = 0; i < report->maxfield; ++i) {
 326                         field = report->field[i];
 327                         if (field->physical == usage_id &&
 328                                 field->logical == attr_usage_id) {
 329                                 sensor_hub_fill_attr_info(info, i, report->id,
 330                                         field->unit, field->unit_exponent,
 331                                         field->report_size);
 332                                 ret = 0;
 333                         } else {
 334                                 for (j = 0; j < field->maxusage; ++j) {
 335                                         if (field->usage[j].hid ==
 336                                         attr_usage_id &&
 337                                         field->usage[j].collection_index ==
 338                                         collection_index)  {
 339                                                 sensor_hub_fill_attr_info(info,
 340                                                         i, report->id,
 341                                                         field->unit,
 342                                                         field->unit_exponent,
 343                                                         field->report_size);
 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  * Handle raw report as sent by device
 401  */
 402 static int sensor_hub_raw_event(struct hid_device *hdev,
 403                 struct hid_report *report, u8 *raw_data, int size)
 404 {
 405         int i;
 406         u8 *ptr;
 407         int sz;
 408         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
 409         unsigned long flags;
 410         struct hid_sensor_hub_callbacks *callback = NULL;
 411         struct hid_collection *collection = NULL;
 412         void *priv = NULL;
 413
 414         hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n",
 415                          report->id, size, report->type);
 416         hid_dbg(hdev, "maxfield:%d\n", report->maxfield);
 417         if (report->type != HID_INPUT_REPORT)
 418                 return 1;
 419
 420         ptr = raw_data;
 421         ptr++; /*Skip report id*/
 422
 423         spin_lock_irqsave(&pdata->lock, flags);
 424
 425         for (i = 0; i < report->maxfield; ++i) {
 426
 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/8);
 431
 432                 sz = report->field[i]->report_size/8;
 433                 if (pdata->pending.status && pdata->pending.attr_usage_id ==
 434                                 report->field[i]->usage->hid) {
 435                         hid_dbg(hdev, "data was pending ...\n");
 436                         pdata->pending.raw_data = kmalloc(sz, GFP_ATOMIC);
 437                         if (pdata->pending.raw_data) {
 438                                 memcpy(pdata->pending.raw_data, ptr, sz);
 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 = kzalloc(sizeof(struct sensor_hub_data), GFP_KERNEL);
 484         if (!sd) {
 485                 hid_err(hdev, "cannot allocate Sensor data\n");
 486                 return -ENOMEM;
 487         }
 488         sd->hsdev = kzalloc(sizeof(struct hid_sensor_hub_device), GFP_KERNEL);
 489         if (!sd->hsdev) {
 490                 hid_err(hdev, "cannot allocate hid_sensor_hub_device\n");
 491                 ret = -ENOMEM;
 492                 goto err_free_hub;
 493         }
 494         hid_set_drvdata(hdev, sd);
 495         sd->hsdev->hdev = hdev;
 496         sd->hsdev->vendor_id = hdev->vendor;
 497         sd->hsdev->product_id = hdev->product;
 498         spin_lock_init(&sd->lock);
 499         spin_lock_init(&sd->dyn_callback_lock);
 500         mutex_init(&sd->mutex);
 501         ret = hid_parse(hdev);
 502         if (ret) {
 503                 hid_err(hdev, "parse failed\n");
 504                 goto err_free;
 505         }
 506         INIT_LIST_HEAD(&hdev->inputs);
 507
 508         ret = hid_hw_start(hdev, 0);
 509         if (ret) {
 510                 hid_err(hdev, "hw start failed\n");
 511                 goto err_free;
 512         }
 513         ret = hid_hw_open(hdev);
 514         if (ret) {
 515                 hid_err(hdev, "failed to open input interrupt pipe\n");
 516                 goto err_stop_hw;
 517         }
 518
 519         INIT_LIST_HEAD(&sd->dyn_callback_list);
 520         sd->hid_sensor_client_cnt = 0;
 521         report_enum = &hdev->report_enum[HID_INPUT_REPORT];
 522
 523         dev_cnt = sensor_hub_get_physical_device_count(report_enum);
 524         if (dev_cnt > HID_MAX_PHY_DEVICES) {
 525                 hid_err(hdev, "Invalid Physical device count\n");
 526                 ret = -EINVAL;
 527                 goto err_close;
 528         }
 529         sd->hid_sensor_hub_client_devs = kzalloc(dev_cnt *
 530                                                 sizeof(struct mfd_cell),
 531                                                 GFP_KERNEL);
 532         if (sd->hid_sensor_hub_client_devs == NULL) {
 533                 hid_err(hdev, "Failed to allocate memory for mfd cells\n");
 534                         ret = -ENOMEM;
 535                         goto err_close;
 536         }
 537         list_for_each_entry(report, &report_enum->report_list, list) {
 538                 hid_dbg(hdev, "Report id:%x\n", report->id);
 539                 field = report->field[0];
 540                 if (report->maxfield && field &&
 541                                         field->physical) {
 542                         name = kasprintf(GFP_KERNEL, "HID-SENSOR-%x",
 543                                                 field->physical);
 544                         if (name  == NULL) {
 545                                 hid_err(hdev, "Failed MFD device name\n");
 546                                         ret = -ENOMEM;
 547                                         goto err_free_names;
 548                         }
 549                         sd->hid_sensor_hub_client_devs[
 550                                 sd->hid_sensor_client_cnt].name = name;
 551                         sd->hid_sensor_hub_client_devs[
 552                                 sd->hid_sensor_client_cnt].platform_data =
 553                                                 sd->hsdev;
 554                         sd->hid_sensor_hub_client_devs[
 555                                 sd->hid_sensor_client_cnt].pdata_size =
 556                                                 sizeof(*sd->hsdev);
 557                         hid_dbg(hdev, "Adding %s:%p\n", name, sd);
 558                         sd->hid_sensor_client_cnt++;
 559                 }
 560         }
 561         ret = mfd_add_devices(&hdev->dev, 0, sd->hid_sensor_hub_client_devs,
 562                 sd->hid_sensor_client_cnt, NULL, 0, NULL);
 563         if (ret < 0)
 564                 goto err_free_names;
 565
 566         return ret;
 567
 568 err_free_names:
 569         for (i = 0; i < sd->hid_sensor_client_cnt ; ++i)
 570                 kfree(sd->hid_sensor_hub_client_devs[i].name);
 571         kfree(sd->hid_sensor_hub_client_devs);
 572 err_close:
 573         hid_hw_close(hdev);
 574 err_stop_hw:
 575         hid_hw_stop(hdev);
 576 err_free:
 577         kfree(sd->hsdev);
 578 err_free_hub:
 579         kfree(sd);
 580
 581         return ret;
 582 }
 583
 584 static void sensor_hub_remove(struct hid_device *hdev)
 585 {
 586         struct sensor_hub_data *data = hid_get_drvdata(hdev);
 587         unsigned long flags;
 588         int i;
 589
 590         hid_dbg(hdev, " hardware removed\n");
 591         hid_hw_close(hdev);
 592         hid_hw_stop(hdev);
 593         spin_lock_irqsave(&data->lock, flags);
 594         if (data->pending.status)
 595                 complete(&data->pending.ready);
 596         spin_unlock_irqrestore(&data->lock, flags);
 597         mfd_remove_devices(&hdev->dev);
 598         for (i = 0; i < data->hid_sensor_client_cnt ; ++i)
 599                 kfree(data->hid_sensor_hub_client_devs[i].name);
 600         kfree(data->hid_sensor_hub_client_devs);
 601         hid_set_drvdata(hdev, NULL);
 602         mutex_destroy(&data->mutex);
 603         kfree(data->hsdev);
 604         kfree(data);
 605 }
 606
 607 static const struct hid_device_id sensor_hub_devices[] = {
 608         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID,
 609                      HID_ANY_ID) },
 610         { }
 611 };
 612 MODULE_DEVICE_TABLE(hid, sensor_hub_devices);
 613
 614 static struct hid_driver sensor_hub_driver = {
 615         .name = "hid-sensor-hub",
 616         .id_table = sensor_hub_devices,
 617         .probe = sensor_hub_probe,
 618         .remove = sensor_hub_remove,
 619         .raw_event = sensor_hub_raw_event,
 620 #ifdef CONFIG_PM
 621         .suspend = sensor_hub_suspend,
 622         .resume =  sensor_hub_resume,
 623         .reset_resume =  sensor_hub_reset_resume,
 624 #endif
 625 };
 626 module_hid_driver(sensor_hub_driver);
 627
 628 MODULE_DESCRIPTION("HID Sensor Hub driver");
 629 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
 630 MODULE_LICENSE("GPL");