drivers/gpu/drm/nouveau/nvkm/engine/device/acpi.c

   1 /*
   2  * Copyright 2014 Red Hat Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Authors: Ben Skeggs
  23  */
  24 #include "acpi.h"
  25
  26 #include <core/device.h>
  27
  28 #ifdef CONFIG_ACPI
  29 static int
  30 nvkm_acpi_ntfy(struct notifier_block *nb, unsigned long val, void *data)
  31 {
  32         struct nvkm_device *device =
  33                 container_of(nb, typeof(*device), acpi.nb);
  34         struct acpi_bus_event *info = data;
  35
  36         if (!strcmp(info->device_class, "ac_adapter"))
  37                 nvkm_event_send(&device->event, 1, 0, NULL, 0);
  38
  39         return NOTIFY_DONE;
  40 }
  41 #endif
  42
  43 void
  44 nvkm_acpi_fini(struct nvkm_device *device)
  45 {
  46 #ifdef CONFIG_ACPI
  47         unregister_acpi_notifier(&device->acpi.nb);
  48 #endif
  49 }
  50
  51 void
  52 nvkm_acpi_init(struct nvkm_device *device)
  53 {
  54 #ifdef CONFIG_ACPI
  55         device->acpi.nb.notifier_call = nvkm_acpi_ntfy;
  56         register_acpi_notifier(&device->acpi.nb);
  57 #endif
  58 }