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