Commit | Line | Data |
---|---|---|
5e928f77 RW |
1 | /* |
2 | * pm_runtime.h - Device run-time power management helper functions. | |
3 | * | |
4 | * Copyright (C) 2009 Rafael J. Wysocki <rjw@sisk.pl> | |
5 | * | |
6 | * This file is released under the GPLv2. | |
7 | */ | |
8 | ||
9 | #ifndef _LINUX_PM_RUNTIME_H | |
10 | #define _LINUX_PM_RUNTIME_H | |
11 | ||
12 | #include <linux/device.h> | |
13 | #include <linux/pm.h> | |
14 | ||
15 | #ifdef CONFIG_PM_RUNTIME | |
16 | ||
17 | extern struct workqueue_struct *pm_wq; | |
18 | ||
19 | extern int pm_runtime_idle(struct device *dev); | |
20 | extern int pm_runtime_suspend(struct device *dev); | |
21 | extern int pm_runtime_resume(struct device *dev); | |
22 | extern int pm_request_idle(struct device *dev); | |
23 | extern int pm_schedule_suspend(struct device *dev, unsigned int delay); | |
24 | extern int pm_request_resume(struct device *dev); | |
25 | extern int __pm_runtime_get(struct device *dev, bool sync); | |
26 | extern int __pm_runtime_put(struct device *dev, bool sync); | |
27 | extern int __pm_runtime_set_status(struct device *dev, unsigned int status); | |
28 | extern int pm_runtime_barrier(struct device *dev); | |
29 | extern void pm_runtime_enable(struct device *dev); | |
30 | extern void __pm_runtime_disable(struct device *dev, bool check_resume); | |
31 | ||
32 | static inline bool pm_children_suspended(struct device *dev) | |
33 | { | |
34 | return dev->power.ignore_children | |
35 | || !atomic_read(&dev->power.child_count); | |
36 | } | |
37 | ||
38 | static inline void pm_suspend_ignore_children(struct device *dev, bool enable) | |
39 | { | |
40 | dev->power.ignore_children = enable; | |
41 | } | |
42 | ||
43 | static inline void pm_runtime_get_noresume(struct device *dev) | |
44 | { | |
45 | atomic_inc(&dev->power.usage_count); | |
46 | } | |
47 | ||
48 | static inline void pm_runtime_put_noidle(struct device *dev) | |
49 | { | |
50 | atomic_add_unless(&dev->power.usage_count, -1, 0); | |
51 | } | |
52 | ||
53 | #else /* !CONFIG_PM_RUNTIME */ | |
54 | ||
55 | static inline int pm_runtime_idle(struct device *dev) { return -ENOSYS; } | |
56 | static inline int pm_runtime_suspend(struct device *dev) { return -ENOSYS; } | |
57 | static inline int pm_runtime_resume(struct device *dev) { return 0; } | |
58 | static inline int pm_request_idle(struct device *dev) { return -ENOSYS; } | |
59 | static inline int pm_schedule_suspend(struct device *dev, unsigned int delay) | |
60 | { | |
61 | return -ENOSYS; | |
62 | } | |
63 | static inline int pm_request_resume(struct device *dev) { return 0; } | |
64 | static inline int __pm_runtime_get(struct device *dev, bool sync) { return 1; } | |
65 | static inline int __pm_runtime_put(struct device *dev, bool sync) { return 0; } | |
66 | static inline int __pm_runtime_set_status(struct device *dev, | |
67 | unsigned int status) { return 0; } | |
68 | static inline int pm_runtime_barrier(struct device *dev) { return 0; } | |
69 | static inline void pm_runtime_enable(struct device *dev) {} | |
70 | static inline void __pm_runtime_disable(struct device *dev, bool c) {} | |
71 | ||
72 | static inline bool pm_children_suspended(struct device *dev) { return false; } | |
73 | static inline void pm_suspend_ignore_children(struct device *dev, bool en) {} | |
74 | static inline void pm_runtime_get_noresume(struct device *dev) {} | |
75 | static inline void pm_runtime_put_noidle(struct device *dev) {} | |
76 | ||
77 | #endif /* !CONFIG_PM_RUNTIME */ | |
78 | ||
79 | static inline int pm_runtime_get(struct device *dev) | |
80 | { | |
81 | return __pm_runtime_get(dev, false); | |
82 | } | |
83 | ||
84 | static inline int pm_runtime_get_sync(struct device *dev) | |
85 | { | |
86 | return __pm_runtime_get(dev, true); | |
87 | } | |
88 | ||
89 | static inline int pm_runtime_put(struct device *dev) | |
90 | { | |
91 | return __pm_runtime_put(dev, false); | |
92 | } | |
93 | ||
94 | static inline int pm_runtime_put_sync(struct device *dev) | |
95 | { | |
96 | return __pm_runtime_put(dev, true); | |
97 | } | |
98 | ||
99 | static inline int pm_runtime_set_active(struct device *dev) | |
100 | { | |
101 | return __pm_runtime_set_status(dev, RPM_ACTIVE); | |
102 | } | |
103 | ||
104 | static inline void pm_runtime_set_suspended(struct device *dev) | |
105 | { | |
106 | __pm_runtime_set_status(dev, RPM_SUSPENDED); | |
107 | } | |
108 | ||
109 | static inline void pm_runtime_disable(struct device *dev) | |
110 | { | |
111 | __pm_runtime_disable(dev, true); | |
112 | } | |
113 | ||
114 | #endif |