Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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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#include <linux/jiffies.h>
16
17/* Runtime PM flag argument bits */
18#define RPM_ASYNC 0x01 /* Request is asynchronous */
19#define RPM_NOWAIT 0x02 /* Don't wait for concurrent
20 state change */
21#define RPM_GET_PUT 0x04 /* Increment/decrement the
22 usage_count */
23#define RPM_AUTO 0x08 /* Use autosuspend_delay */
24
25#ifdef CONFIG_PM_RUNTIME
26
27extern struct workqueue_struct *pm_wq;
28
29extern int __pm_runtime_idle(struct device *dev, int rpmflags);
30extern int __pm_runtime_suspend(struct device *dev, int rpmflags);
31extern int __pm_runtime_resume(struct device *dev, int rpmflags);
32extern int pm_schedule_suspend(struct device *dev, unsigned int delay);
33extern int __pm_runtime_set_status(struct device *dev, unsigned int status);
34extern int pm_runtime_barrier(struct device *dev);
35extern void pm_runtime_enable(struct device *dev);
36extern void __pm_runtime_disable(struct device *dev, bool check_resume);
37extern void pm_runtime_allow(struct device *dev);
38extern void pm_runtime_forbid(struct device *dev);
39extern int pm_generic_runtime_idle(struct device *dev);
40extern int pm_generic_runtime_suspend(struct device *dev);
41extern int pm_generic_runtime_resume(struct device *dev);
42extern void pm_runtime_no_callbacks(struct device *dev);
43extern void __pm_runtime_use_autosuspend(struct device *dev, bool use);
44extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay);
45extern unsigned long pm_runtime_autosuspend_expiration(struct device *dev);
46
47static inline bool pm_children_suspended(struct device *dev)
48{
49 return dev->power.ignore_children
50 || !atomic_read(&dev->power.child_count);
51}
52
53static inline void pm_suspend_ignore_children(struct device *dev, bool enable)
54{
55 dev->power.ignore_children = enable;
56}
57
58static inline void pm_runtime_get_noresume(struct device *dev)
59{
60 atomic_inc(&dev->power.usage_count);
61}
62
63static inline void pm_runtime_put_noidle(struct device *dev)
64{
65 atomic_add_unless(&dev->power.usage_count, -1, 0);
66}
67
68static inline bool device_run_wake(struct device *dev)
69{
70 return dev->power.run_wake;
71}
72
73static inline void device_set_run_wake(struct device *dev, bool enable)
74{
75 dev->power.run_wake = enable;
76}
77
78static inline bool pm_runtime_suspended(struct device *dev)
79{
80 return dev->power.runtime_status == RPM_SUSPENDED
81 && !dev->power.disable_depth;
82}
83
84static inline void pm_runtime_mark_last_busy(struct device *dev)
85{
86 ACCESS_ONCE(dev->power.last_busy) = jiffies;
87}
88
89#else /* !CONFIG_PM_RUNTIME */
90
91static inline int __pm_runtime_idle(struct device *dev, int rpmflags)
92{
93 return -ENOSYS;
94}
95static inline int __pm_runtime_suspend(struct device *dev, int rpmflags)
96{
97 return -ENOSYS;
98}
99static inline int __pm_runtime_resume(struct device *dev, int rpmflags)
100{
101 return 1;
102}
103static inline int pm_schedule_suspend(struct device *dev, unsigned int delay)
104{
105 return -ENOSYS;
106}
107static inline int __pm_runtime_set_status(struct device *dev,
108 unsigned int status) { return 0; }
109static inline int pm_runtime_barrier(struct device *dev) { return 0; }
110static inline void pm_runtime_enable(struct device *dev) {}
111static inline void __pm_runtime_disable(struct device *dev, bool c) {}
112static inline void pm_runtime_allow(struct device *dev) {}
113static inline void pm_runtime_forbid(struct device *dev) {}
114
115static inline bool pm_children_suspended(struct device *dev) { return false; }
116static inline void pm_suspend_ignore_children(struct device *dev, bool en) {}
117static inline void pm_runtime_get_noresume(struct device *dev) {}
118static inline void pm_runtime_put_noidle(struct device *dev) {}
119static inline bool device_run_wake(struct device *dev) { return false; }
120static inline void device_set_run_wake(struct device *dev, bool enable) {}
121static inline bool pm_runtime_suspended(struct device *dev) { return false; }
122
123static inline int pm_generic_runtime_idle(struct device *dev) { return 0; }
124static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; }
125static inline int pm_generic_runtime_resume(struct device *dev) { return 0; }
126static inline void pm_runtime_no_callbacks(struct device *dev) {}
127
128static inline void pm_runtime_mark_last_busy(struct device *dev) {}
129static inline void __pm_runtime_use_autosuspend(struct device *dev,
130 bool use) {}
131static inline void pm_runtime_set_autosuspend_delay(struct device *dev,
132 int delay) {}
133static inline unsigned long pm_runtime_autosuspend_expiration(
134 struct device *dev) { return 0; }
135
136#endif /* !CONFIG_PM_RUNTIME */
137
138static inline int pm_runtime_idle(struct device *dev)
139{
140 return __pm_runtime_idle(dev, 0);
141}
142
143static inline int pm_runtime_suspend(struct device *dev)
144{
145 return __pm_runtime_suspend(dev, 0);
146}
147
148static inline int pm_runtime_autosuspend(struct device *dev)
149{
150 return __pm_runtime_suspend(dev, RPM_AUTO);
151}
152
153static inline int pm_runtime_resume(struct device *dev)
154{
155 return __pm_runtime_resume(dev, 0);
156}
157
158static inline int pm_request_idle(struct device *dev)
159{
160 return __pm_runtime_idle(dev, RPM_ASYNC);
161}
162
163static inline int pm_request_resume(struct device *dev)
164{
165 return __pm_runtime_resume(dev, RPM_ASYNC);
166}
167
168static inline int pm_request_autosuspend(struct device *dev)
169{
170 return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO);
171}
172
173static inline int pm_runtime_get(struct device *dev)
174{
175 return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC);
176}
177
178static inline int pm_runtime_get_sync(struct device *dev)
179{
180 return __pm_runtime_resume(dev, RPM_GET_PUT);
181}
182
183static inline int pm_runtime_put(struct device *dev)
184{
185 return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC);
186}
187
188static inline int pm_runtime_put_autosuspend(struct device *dev)
189{
190 return __pm_runtime_suspend(dev,
191 RPM_GET_PUT | RPM_ASYNC | RPM_AUTO);
192}
193
194static inline int pm_runtime_put_sync(struct device *dev)
195{
196 return __pm_runtime_idle(dev, RPM_GET_PUT);
197}
198
199static inline int pm_runtime_put_sync_autosuspend(struct device *dev)
200{
201 return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO);
202}
203
204static inline int pm_runtime_set_active(struct device *dev)
205{
206 return __pm_runtime_set_status(dev, RPM_ACTIVE);
207}
208
209static inline void pm_runtime_set_suspended(struct device *dev)
210{
211 __pm_runtime_set_status(dev, RPM_SUSPENDED);
212}
213
214static inline void pm_runtime_disable(struct device *dev)
215{
216 __pm_runtime_disable(dev, true);
217}
218
219static inline void pm_runtime_use_autosuspend(struct device *dev)
220{
221 __pm_runtime_use_autosuspend(dev, true);
222}
223
224static inline void pm_runtime_dont_use_autosuspend(struct device *dev)
225{
226 __pm_runtime_use_autosuspend(dev, false);
227}
228
229#endif