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 #include <subdev/clk.h>
28 
29 #ifdef CONFIG_ACPI
30 static int
nvkm_acpi_ntfy(struct notifier_block * nb,unsigned long val,void * data)31 nvkm_acpi_ntfy(struct notifier_block *nb, unsigned long val, void *data)
32 {
33 	struct nvkm_device *device = 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_clk_pwrsrc(device);
38 
39 	return NOTIFY_DONE;
40 }
41 #endif
42 
43 void
nvkm_acpi_fini(struct nvkm_device * device)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
nvkm_acpi_init(struct nvkm_device * device)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 }
59