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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); | |
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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 | extern int pm_generic_runtime_idle(struct device *dev); |
34 | extern int pm_generic_runtime_suspend(struct device *dev); | |
35 | extern int pm_generic_runtime_resume(struct device *dev); | |
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36 | |
37 | static inline bool pm_children_suspended(struct device *dev) | |
38 | { | |
39 | return dev->power.ignore_children | |
40 | || !atomic_read(&dev->power.child_count); | |
41 | } | |
42 | ||
43 | static inline void pm_suspend_ignore_children(struct device *dev, bool enable) | |
44 | { | |
45 | dev->power.ignore_children = enable; | |
46 | } | |
47 | ||
48 | static inline void pm_runtime_get_noresume(struct device *dev) | |
49 | { | |
50 | atomic_inc(&dev->power.usage_count); | |
51 | } | |
52 | ||
53 | static inline void pm_runtime_put_noidle(struct device *dev) | |
54 | { | |
55 | atomic_add_unless(&dev->power.usage_count, -1, 0); | |
56 | } | |
57 | ||
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58 | static inline bool device_run_wake(struct device *dev) |
59 | { | |
60 | return dev->power.run_wake; | |
61 | } | |
62 | ||
63 | static inline void device_set_run_wake(struct device *dev, bool enable) | |
64 | { | |
65 | dev->power.run_wake = enable; | |
66 | } | |
67 | ||
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68 | static inline bool pm_runtime_suspended(struct device *dev) |
69 | { | |
70 | return dev->power.runtime_status == RPM_SUSPENDED; | |
71 | } | |
72 | ||
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73 | #else /* !CONFIG_PM_RUNTIME */ |
74 | ||
75 | static inline int pm_runtime_idle(struct device *dev) { return -ENOSYS; } | |
76 | static inline int pm_runtime_suspend(struct device *dev) { return -ENOSYS; } | |
77 | static inline int pm_runtime_resume(struct device *dev) { return 0; } | |
78 | static inline int pm_request_idle(struct device *dev) { return -ENOSYS; } | |
79 | static inline int pm_schedule_suspend(struct device *dev, unsigned int delay) | |
80 | { | |
81 | return -ENOSYS; | |
82 | } | |
83 | static inline int pm_request_resume(struct device *dev) { return 0; } | |
84 | static inline int __pm_runtime_get(struct device *dev, bool sync) { return 1; } | |
85 | static inline int __pm_runtime_put(struct device *dev, bool sync) { return 0; } | |
86 | static inline int __pm_runtime_set_status(struct device *dev, | |
87 | unsigned int status) { return 0; } | |
88 | static inline int pm_runtime_barrier(struct device *dev) { return 0; } | |
89 | static inline void pm_runtime_enable(struct device *dev) {} | |
90 | static inline void __pm_runtime_disable(struct device *dev, bool c) {} | |
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91 | static inline void pm_runtime_allow(struct device *dev) {} |
92 | static inline void pm_runtime_forbid(struct device *dev) {} | |
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93 | |
94 | static inline bool pm_children_suspended(struct device *dev) { return false; } | |
95 | static inline void pm_suspend_ignore_children(struct device *dev, bool en) {} | |
96 | static inline void pm_runtime_get_noresume(struct device *dev) {} | |
97 | static inline void pm_runtime_put_noidle(struct device *dev) {} | |
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98 | static inline bool device_run_wake(struct device *dev) { return false; } |
99 | static inline void device_set_run_wake(struct device *dev, bool enable) {} | |
d690b2cd | 100 | static inline bool pm_runtime_suspended(struct device *dev) { return false; } |
5e928f77 | 101 | |
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102 | static inline int pm_generic_runtime_idle(struct device *dev) { return 0; } |
103 | static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; } | |
104 | static inline int pm_generic_runtime_resume(struct device *dev) { return 0; } | |
105 | ||
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106 | #endif /* !CONFIG_PM_RUNTIME */ |
107 | ||
108 | static inline int pm_runtime_get(struct device *dev) | |
109 | { | |
110 | return __pm_runtime_get(dev, false); | |
111 | } | |
112 | ||
113 | static inline int pm_runtime_get_sync(struct device *dev) | |
114 | { | |
115 | return __pm_runtime_get(dev, true); | |
116 | } | |
117 | ||
118 | static inline int pm_runtime_put(struct device *dev) | |
119 | { | |
120 | return __pm_runtime_put(dev, false); | |
121 | } | |
122 | ||
123 | static inline int pm_runtime_put_sync(struct device *dev) | |
124 | { | |
125 | return __pm_runtime_put(dev, true); | |
126 | } | |
127 | ||
128 | static inline int pm_runtime_set_active(struct device *dev) | |
129 | { | |
130 | return __pm_runtime_set_status(dev, RPM_ACTIVE); | |
131 | } | |
132 | ||
133 | static inline void pm_runtime_set_suspended(struct device *dev) | |
134 | { | |
135 | __pm_runtime_set_status(dev, RPM_SUSPENDED); | |
136 | } | |
137 | ||
138 | static inline void pm_runtime_disable(struct device *dev) | |
139 | { | |
140 | __pm_runtime_disable(dev, true); | |
141 | } | |
142 | ||
143 | #endif |