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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); | |
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31 | extern void pm_runtime_allow(struct device *dev); |
32 | extern void pm_runtime_forbid(struct device *dev); | |
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33 | |
34 | static inline bool pm_children_suspended(struct device *dev) | |
35 | { | |
36 | return dev->power.ignore_children | |
37 | || !atomic_read(&dev->power.child_count); | |
38 | } | |
39 | ||
40 | static inline void pm_suspend_ignore_children(struct device *dev, bool enable) | |
41 | { | |
42 | dev->power.ignore_children = enable; | |
43 | } | |
44 | ||
45 | static inline void pm_runtime_get_noresume(struct device *dev) | |
46 | { | |
47 | atomic_inc(&dev->power.usage_count); | |
48 | } | |
49 | ||
50 | static inline void pm_runtime_put_noidle(struct device *dev) | |
51 | { | |
52 | atomic_add_unless(&dev->power.usage_count, -1, 0); | |
53 | } | |
54 | ||
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55 | static inline bool device_run_wake(struct device *dev) |
56 | { | |
57 | return dev->power.run_wake; | |
58 | } | |
59 | ||
60 | static inline void device_set_run_wake(struct device *dev, bool enable) | |
61 | { | |
62 | dev->power.run_wake = enable; | |
63 | } | |
64 | ||
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65 | #else /* !CONFIG_PM_RUNTIME */ |
66 | ||
67 | static inline int pm_runtime_idle(struct device *dev) { return -ENOSYS; } | |
68 | static inline int pm_runtime_suspend(struct device *dev) { return -ENOSYS; } | |
69 | static inline int pm_runtime_resume(struct device *dev) { return 0; } | |
70 | static inline int pm_request_idle(struct device *dev) { return -ENOSYS; } | |
71 | static inline int pm_schedule_suspend(struct device *dev, unsigned int delay) | |
72 | { | |
73 | return -ENOSYS; | |
74 | } | |
75 | static inline int pm_request_resume(struct device *dev) { return 0; } | |
76 | static inline int __pm_runtime_get(struct device *dev, bool sync) { return 1; } | |
77 | static inline int __pm_runtime_put(struct device *dev, bool sync) { return 0; } | |
78 | static inline int __pm_runtime_set_status(struct device *dev, | |
79 | unsigned int status) { return 0; } | |
80 | static inline int pm_runtime_barrier(struct device *dev) { return 0; } | |
81 | static inline void pm_runtime_enable(struct device *dev) {} | |
82 | static inline void __pm_runtime_disable(struct device *dev, bool c) {} | |
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83 | static inline void pm_runtime_allow(struct device *dev) {} |
84 | static inline void pm_runtime_forbid(struct device *dev) {} | |
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85 | |
86 | static inline bool pm_children_suspended(struct device *dev) { return false; } | |
87 | static inline void pm_suspend_ignore_children(struct device *dev, bool en) {} | |
88 | static inline void pm_runtime_get_noresume(struct device *dev) {} | |
89 | static inline void pm_runtime_put_noidle(struct device *dev) {} | |
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90 | static inline bool device_run_wake(struct device *dev) { return false; } |
91 | static inline void device_set_run_wake(struct device *dev, bool enable) {} | |
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92 | |
93 | #endif /* !CONFIG_PM_RUNTIME */ | |
94 | ||
95 | static inline int pm_runtime_get(struct device *dev) | |
96 | { | |
97 | return __pm_runtime_get(dev, false); | |
98 | } | |
99 | ||
100 | static inline int pm_runtime_get_sync(struct device *dev) | |
101 | { | |
102 | return __pm_runtime_get(dev, true); | |
103 | } | |
104 | ||
105 | static inline int pm_runtime_put(struct device *dev) | |
106 | { | |
107 | return __pm_runtime_put(dev, false); | |
108 | } | |
109 | ||
110 | static inline int pm_runtime_put_sync(struct device *dev) | |
111 | { | |
112 | return __pm_runtime_put(dev, true); | |
113 | } | |
114 | ||
115 | static inline int pm_runtime_set_active(struct device *dev) | |
116 | { | |
117 | return __pm_runtime_set_status(dev, RPM_ACTIVE); | |
118 | } | |
119 | ||
120 | static inline void pm_runtime_set_suspended(struct device *dev) | |
121 | { | |
122 | __pm_runtime_set_status(dev, RPM_SUSPENDED); | |
123 | } | |
124 | ||
125 | static inline void pm_runtime_disable(struct device *dev) | |
126 | { | |
127 | __pm_runtime_disable(dev, true); | |
128 | } | |
129 | ||
130 | #endif |