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6fa3eb70 S |
1 | /* include/linux/wakelock.h |
2 | * | |
3 | * Copyright (C) 2007-2012 Google, Inc. | |
4 | * | |
5 | * This software is licensed under the terms of the GNU General Public | |
6 | * License version 2, as published by the Free Software Foundation, and | |
7 | * may be copied, distributed, and modified under those terms. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | */ | |
15 | ||
16 | #ifndef _LINUX_WAKELOCK_H | |
17 | #define _LINUX_WAKELOCK_H | |
18 | ||
19 | #include <linux/ktime.h> | |
20 | #include <linux/device.h> | |
21 | ||
22 | /* A wake_lock prevents the system from entering suspend or other low power | |
23 | * states when active. If the type is set to WAKE_LOCK_SUSPEND, the wake_lock | |
24 | * prevents a full system suspend. | |
25 | */ | |
26 | ||
27 | enum { | |
28 | WAKE_LOCK_SUSPEND, /* Prevent suspend */ | |
29 | WAKE_LOCK_TYPE_COUNT | |
30 | }; | |
31 | ||
32 | struct wake_lock { | |
33 | struct wakeup_source ws; | |
34 | }; | |
35 | ||
36 | static inline void wake_lock_init(struct wake_lock *lock, int type, | |
37 | const char *name) | |
38 | { | |
39 | wakeup_source_init(&lock->ws, name); | |
40 | } | |
41 | ||
42 | static inline void wake_lock_destroy(struct wake_lock *lock) | |
43 | { | |
44 | wakeup_source_trash(&lock->ws); | |
45 | } | |
46 | ||
47 | static inline void wake_lock(struct wake_lock *lock) | |
48 | { | |
49 | __pm_stay_awake(&lock->ws); | |
50 | } | |
51 | ||
52 | static inline void wake_lock_timeout(struct wake_lock *lock, long timeout) | |
53 | { | |
54 | __pm_wakeup_event(&lock->ws, jiffies_to_msecs(timeout)); | |
55 | } | |
56 | ||
57 | static inline void wake_unlock(struct wake_lock *lock) | |
58 | { | |
59 | __pm_relax(&lock->ws); | |
60 | } | |
61 | ||
62 | static inline int wake_lock_active(struct wake_lock *lock) | |
63 | { | |
64 | return lock->ws.active; | |
65 | } | |
66 | ||
67 | #endif |