Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
17extern struct workqueue_struct *pm_wq;
18
19extern int pm_runtime_idle(struct device *dev);
20extern int pm_runtime_suspend(struct device *dev);
21extern int pm_runtime_resume(struct device *dev);
22extern int pm_request_idle(struct device *dev);
23extern int pm_schedule_suspend(struct device *dev, unsigned int delay);
24extern int pm_request_resume(struct device *dev);
25extern int __pm_runtime_get(struct device *dev, bool sync);
26extern int __pm_runtime_put(struct device *dev, bool sync);
27extern int __pm_runtime_set_status(struct device *dev, unsigned int status);
28extern int pm_runtime_barrier(struct device *dev);
29extern void pm_runtime_enable(struct device *dev);
30extern void __pm_runtime_disable(struct device *dev, bool check_resume);
31extern void pm_runtime_allow(struct device *dev);
32extern void pm_runtime_forbid(struct device *dev);
33
34static inline bool pm_children_suspended(struct device *dev)
35{
36 return dev->power.ignore_children
37 || !atomic_read(&dev->power.child_count);
38}
39
40static inline void pm_suspend_ignore_children(struct device *dev, bool enable)
41{
42 dev->power.ignore_children = enable;
43}
44
45static inline void pm_runtime_get_noresume(struct device *dev)
46{
47 atomic_inc(&dev->power.usage_count);
48}
49
50static inline void pm_runtime_put_noidle(struct device *dev)
51{
52 atomic_add_unless(&dev->power.usage_count, -1, 0);
53}
54
55static inline bool device_run_wake(struct device *dev)
56{
57 return dev->power.run_wake;
58}
59
60static inline void device_set_run_wake(struct device *dev, bool enable)
61{
62 dev->power.run_wake = enable;
63}
64
65static inline bool pm_runtime_suspended(struct device *dev)
66{
67 return dev->power.runtime_status == RPM_SUSPENDED;
68}
69
70#else /* !CONFIG_PM_RUNTIME */
71
72static inline int pm_runtime_idle(struct device *dev) { return -ENOSYS; }
73static inline int pm_runtime_suspend(struct device *dev) { return -ENOSYS; }
74static inline int pm_runtime_resume(struct device *dev) { return 0; }
75static inline int pm_request_idle(struct device *dev) { return -ENOSYS; }
76static inline int pm_schedule_suspend(struct device *dev, unsigned int delay)
77{
78 return -ENOSYS;
79}
80static inline int pm_request_resume(struct device *dev) { return 0; }
81static inline int __pm_runtime_get(struct device *dev, bool sync) { return 1; }
82static inline int __pm_runtime_put(struct device *dev, bool sync) { return 0; }
83static inline int __pm_runtime_set_status(struct device *dev,
84 unsigned int status) { return 0; }
85static inline int pm_runtime_barrier(struct device *dev) { return 0; }
86static inline void pm_runtime_enable(struct device *dev) {}
87static inline void __pm_runtime_disable(struct device *dev, bool c) {}
88static inline void pm_runtime_allow(struct device *dev) {}
89static inline void pm_runtime_forbid(struct device *dev) {}
90
91static inline bool pm_children_suspended(struct device *dev) { return false; }
92static inline void pm_suspend_ignore_children(struct device *dev, bool en) {}
93static inline void pm_runtime_get_noresume(struct device *dev) {}
94static inline void pm_runtime_put_noidle(struct device *dev) {}
95static inline bool device_run_wake(struct device *dev) { return false; }
96static inline void device_set_run_wake(struct device *dev, bool enable) {}
97static inline bool pm_runtime_suspended(struct device *dev) { return false; }
98
99#endif /* !CONFIG_PM_RUNTIME */
100
101static inline int pm_runtime_get(struct device *dev)
102{
103 return __pm_runtime_get(dev, false);
104}
105
106static inline int pm_runtime_get_sync(struct device *dev)
107{
108 return __pm_runtime_get(dev, true);
109}
110
111static inline int pm_runtime_put(struct device *dev)
112{
113 return __pm_runtime_put(dev, false);
114}
115
116static inline int pm_runtime_put_sync(struct device *dev)
117{
118 return __pm_runtime_put(dev, true);
119}
120
121static inline int pm_runtime_set_active(struct device *dev)
122{
123 return __pm_runtime_set_status(dev, RPM_ACTIVE);
124}
125
126static inline void pm_runtime_set_suspended(struct device *dev)
127{
128 __pm_runtime_set_status(dev, RPM_SUSPENDED);
129}
130
131static inline void pm_runtime_disable(struct device *dev)
132{
133 __pm_runtime_disable(dev, true);
134}
135
136#endif