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, struct hid_field *field)
 116 {
 117         info->index = index;
 118         info->report_id = report_id;
 119         info->units = field->unit;
 120         info->unit_expo = field->unit_exponent;
 121         info->size = (field->report_size * field->report_count)/8;
 122         info->logical_minimum = field->logical_minimum;
 123         info->logical_maximum = field->logical_maximum;
 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         hid_hw_wait(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             report->field[field_index]->report_count < 1) {
 227                 ret = -EINVAL;
 228                 goto done_proc;
 229         }
 230         hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
 231         hid_hw_wait(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         hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
 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);
 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, field);
 340                                                 ret = 0;
 341                                                 break;
 342                                         }
 343                                 }
 344                         }
 345                         if (ret == 0)
 346                                 break;
 347                 }
 348         }
 349
 350 err_ret:
 351         return ret;
 352 }
 353 EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info);
 354
 355 #ifdef CONFIG_PM
 356 static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message)
 357 {
 358         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
 359         struct hid_sensor_hub_callbacks_list *callback;
 360
 361         hid_dbg(hdev, " sensor_hub_suspend\n");
 362         spin_lock(&pdata->dyn_callback_lock);
 363         list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
 364                 if (callback->usage_callback->suspend)
 365                         callback->usage_callback->suspend(
 366                                         pdata->hsdev, callback->priv);
 367         }
 368         spin_unlock(&pdata->dyn_callback_lock);
 369
 370         return 0;
 371 }
 372
 373 static int sensor_hub_resume(struct hid_device *hdev)
 374 {
 375         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
 376         struct hid_sensor_hub_callbacks_list *callback;
 377
 378         hid_dbg(hdev, " sensor_hub_resume\n");
 379         spin_lock(&pdata->dyn_callback_lock);
 380         list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
 381                 if (callback->usage_callback->resume)
 382                         callback->usage_callback->resume(
 383                                         pdata->hsdev, callback->priv);
 384         }
 385         spin_unlock(&pdata->dyn_callback_lock);
 386
 387         return 0;
 388 }
 389
 390 static int sensor_hub_reset_resume(struct hid_device *hdev)
 391 {
 392         return 0;
 393 }
 394 #endif
 395
 396 /*
 397  * Handle raw report as sent by device
 398  */
 399 static int sensor_hub_raw_event(struct hid_device *hdev,
 400                 struct hid_report *report, u8 *raw_data, int size)
 401 {
 402         int i;
 403         u8 *ptr;
 404         int sz;
 405         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
 406         unsigned long flags;
 407         struct hid_sensor_hub_callbacks *callback = NULL;
 408         struct hid_collection *collection = NULL;
 409         void *priv = NULL;
 410
 411         hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n",
 412                          report->id, size, report->type);
 413         hid_dbg(hdev, "maxfield:%d\n", report->maxfield);
 414         if (report->type != HID_INPUT_REPORT)
 415                 return 1;
 416
 417         ptr = raw_data;
 418         ptr++; /* Skip report id */
 419
 420         spin_lock_irqsave(&pdata->lock, flags);
 421
 422         for (i = 0; i < report->maxfield; ++i) {
 423                 hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n",
 424                                 i, report->field[i]->usage->collection_index,
 425                                 report->field[i]->usage->hid,
 426                                 (report->field[i]->report_size *
 427                                         report->field[i]->report_count)/8);
 428                 sz = (report->field[i]->report_size *
 429                                         report->field[i]->report_count)/8;
 430                 if (pdata->pending.status && pdata->pending.attr_usage_id ==
 431                                 report->field[i]->usage->hid) {
 432                         hid_dbg(hdev, "data was pending ...\n");
 433                         pdata->pending.raw_data = kmemdup(ptr, sz, GFP_ATOMIC);
 434                         if (pdata->pending.raw_data)
 435                                 pdata->pending.raw_size = sz;
 436                         else
 437                                 pdata->pending.raw_size = 0;
 438                         complete(&pdata->pending.ready);
 439                 }
 440                 collection = &hdev->collection[
 441                                 report->field[i]->usage->collection_index];
 442                 hid_dbg(hdev, "collection->usage %x\n",
 443                                         collection->usage);
 444                 callback = sensor_hub_get_callback(pdata->hsdev->hdev,
 445                                                 report->field[i]->physical,
 446                                                         &priv);
 447                 if (callback && callback->capture_sample) {
 448                         if (report->field[i]->logical)
 449                                 callback->capture_sample(pdata->hsdev,
 450                                         report->field[i]->logical, sz, ptr,
 451                                         callback->pdev);
 452                         else
 453                                 callback->capture_sample(pdata->hsdev,
 454                                         report->field[i]->usage->hid, sz, ptr,
 455                                         callback->pdev);
 456                 }
 457                 ptr += sz;
 458         }
 459         if (callback && collection && callback->send_event)
 460                 callback->send_event(pdata->hsdev, collection->usage,
 461                                 callback->pdev);
 462         spin_unlock_irqrestore(&pdata->lock, flags);
 463
 464         return 1;
 465 }
 466
 467 int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev)
 468 {
 469         int ret = 0;
 470         struct sensor_hub_data *data =  hid_get_drvdata(hsdev->hdev);
 471
 472         mutex_lock(&data->mutex);
 473         if (!hsdev->ref_cnt) {
 474                 ret = hid_hw_open(hsdev->hdev);
 475                 if (ret) {
 476                         hid_err(hsdev->hdev, "failed to open hid device\n");
 477                         mutex_unlock(&data->mutex);
 478                         return ret;
 479                 }
 480         }
 481         hsdev->ref_cnt++;
 482         mutex_unlock(&data->mutex);
 483
 484         return ret;
 485 }
 486 EXPORT_SYMBOL_GPL(sensor_hub_device_open);
 487
 488 void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev)
 489 {
 490         struct sensor_hub_data *data =  hid_get_drvdata(hsdev->hdev);
 491
 492         mutex_lock(&data->mutex);
 493         hsdev->ref_cnt--;
 494         if (!hsdev->ref_cnt)
 495                 hid_hw_close(hsdev->hdev);
 496         mutex_unlock(&data->mutex);
 497 }
 498 EXPORT_SYMBOL_GPL(sensor_hub_device_close);
 499
 500 static int sensor_hub_probe(struct hid_device *hdev,
 501                                 const struct hid_device_id *id)
 502 {
 503         int ret;
 504         struct sensor_hub_data *sd;
 505         int i;
 506         char *name;
 507         struct hid_report *report;
 508         struct hid_report_enum *report_enum;
 509         struct hid_field *field;
 510         int dev_cnt;
 511
 512         sd = devm_kzalloc(&hdev->dev, sizeof(*sd), GFP_KERNEL);
 513         if (!sd) {
 514                 hid_err(hdev, "cannot allocate Sensor data\n");
 515                 return -ENOMEM;
 516         }
 517         sd->hsdev = devm_kzalloc(&hdev->dev, sizeof(*sd->hsdev), GFP_KERNEL);
 518         if (!sd->hsdev) {
 519                 hid_err(hdev, "cannot allocate hid_sensor_hub_device\n");
 520                 return -ENOMEM;
 521         }
 522         hid_set_drvdata(hdev, sd);
 523         sd->hsdev->hdev = hdev;
 524         sd->hsdev->vendor_id = hdev->vendor;
 525         sd->hsdev->product_id = hdev->product;
 526         spin_lock_init(&sd->lock);
 527         spin_lock_init(&sd->dyn_callback_lock);
 528         mutex_init(&sd->mutex);
 529         ret = hid_parse(hdev);
 530         if (ret) {
 531                 hid_err(hdev, "parse failed\n");
 532                 return ret;
 533         }
 534         INIT_LIST_HEAD(&hdev->inputs);
 535
 536         ret = hid_hw_start(hdev, 0);
 537         if (ret) {
 538                 hid_err(hdev, "hw start failed\n");
 539                 return ret;
 540         }
 541         INIT_LIST_HEAD(&sd->dyn_callback_list);
 542         sd->hid_sensor_client_cnt = 0;
 543         report_enum = &hdev->report_enum[HID_INPUT_REPORT];
 544
 545         dev_cnt = sensor_hub_get_physical_device_count(report_enum);
 546         if (dev_cnt > HID_MAX_PHY_DEVICES) {
 547                 hid_err(hdev, "Invalid Physical device count\n");
 548                 ret = -EINVAL;
 549                 goto err_stop_hw;
 550         }
 551         sd->hid_sensor_hub_client_devs = kzalloc(dev_cnt *
 552                                                 sizeof(struct mfd_cell),
 553                                                 GFP_KERNEL);
 554         if (sd->hid_sensor_hub_client_devs == NULL) {
 555                 hid_err(hdev, "Failed to allocate memory for mfd cells\n");
 556                         ret = -ENOMEM;
 557                         goto err_stop_hw;
 558         }
 559         list_for_each_entry(report, &report_enum->report_list, list) {
 560                 hid_dbg(hdev, "Report id:%x\n", report->id);
 561                 field = report->field[0];
 562                 if (report->maxfield && field &&
 563                                         field->physical) {
 564                         name = kasprintf(GFP_KERNEL, "HID-SENSOR-%x",
 565                                                 field->physical);
 566                         if (name == NULL) {
 567                                 hid_err(hdev, "Failed MFD device name\n");
 568                                         ret = -ENOMEM;
 569                                         goto err_free_names;
 570                         }
 571                         sd->hid_sensor_hub_client_devs[
 572                                 sd->hid_sensor_client_cnt].id = PLATFORM_DEVID_AUTO;
 573                         sd->hid_sensor_hub_client_devs[
 574                                 sd->hid_sensor_client_cnt].name = name;
 575                         sd->hid_sensor_hub_client_devs[
 576                                 sd->hid_sensor_client_cnt].platform_data =
 577                                                 sd->hsdev;
 578                         sd->hid_sensor_hub_client_devs[
 579                                 sd->hid_sensor_client_cnt].pdata_size =
 580                                                 sizeof(*sd->hsdev);
 581                         hid_dbg(hdev, "Adding %s:%p\n", name, sd);
 582                         sd->hid_sensor_client_cnt++;
 583                 }
 584         }
 585         ret = mfd_add_devices(&hdev->dev, 0, sd->hid_sensor_hub_client_devs,
 586                 sd->hid_sensor_client_cnt, NULL, 0, NULL);
 587         if (ret < 0)
 588                 goto err_free_names;
 589
 590         return ret;
 591
 592 err_free_names:
 593         for (i = 0; i < sd->hid_sensor_client_cnt ; ++i)
 594                 kfree(sd->hid_sensor_hub_client_devs[i].name);
 595         kfree(sd->hid_sensor_hub_client_devs);
 596 err_stop_hw:
 597         hid_hw_stop(hdev);
 598
 599         return ret;
 600 }
 601
 602 static void sensor_hub_remove(struct hid_device *hdev)
 603 {
 604         struct sensor_hub_data *data = hid_get_drvdata(hdev);
 605         unsigned long flags;
 606         int i;
 607
 608         hid_dbg(hdev, " hardware removed\n");
 609         hid_hw_close(hdev);
 610         hid_hw_stop(hdev);
 611         spin_lock_irqsave(&data->lock, flags);
 612         if (data->pending.status)
 613                 complete(&data->pending.ready);
 614         spin_unlock_irqrestore(&data->lock, flags);
 615         mfd_remove_devices(&hdev->dev);
 616         for (i = 0; i < data->hid_sensor_client_cnt ; ++i)
 617                 kfree(data->hid_sensor_hub_client_devs[i].name);
 618         kfree(data->hid_sensor_hub_client_devs);
 619         hid_set_drvdata(hdev, NULL);
 620         mutex_destroy(&data->mutex);
 621 }
 622
 623 static const struct hid_device_id sensor_hub_devices[] = {
 624         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID,
 625                      HID_ANY_ID) },
 626         { }
 627 };
 628 MODULE_DEVICE_TABLE(hid, sensor_hub_devices);
 629
 630 static struct hid_driver sensor_hub_driver = {
 631         .name = "hid-sensor-hub",
 632         .id_table = sensor_hub_devices,
 633         .probe = sensor_hub_probe,
 634         .remove = sensor_hub_remove,
 635         .raw_event = sensor_hub_raw_event,
 636 #ifdef CONFIG_PM
 637         .suspend = sensor_hub_suspend,
 638         .resume = sensor_hub_resume,
 639         .reset_resume = sensor_hub_reset_resume,
 640 #endif
 641 };
 642 module_hid_driver(sensor_hub_driver);
 643
 644 MODULE_DESCRIPTION("HID Sensor Hub driver");
 645 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
 646 MODULE_LICENSE("GPL");