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/notifier.h>
14#include <linux/pm.h>
15
16#include <linux/jiffies.h>
17
18/* Runtime PM flag argument bits */
19#define RPM_ASYNC 0x01 /* Request is asynchronous */
20#define RPM_NOWAIT 0x02 /* Don't wait for concurrent
21 state change */
22#define RPM_GET_PUT 0x04 /* Increment/decrement the
23 usage_count */
24#define RPM_AUTO 0x08 /* Use autosuspend_delay */
25
26#ifdef CONFIG_PM_RUNTIME
27
28extern struct workqueue_struct *pm_wq;
29
30extern int __pm_runtime_idle(struct device *dev, int rpmflags);
31extern int __pm_runtime_suspend(struct device *dev, int rpmflags);
32extern int __pm_runtime_resume(struct device *dev, int rpmflags);
33extern int pm_schedule_suspend(struct device *dev, unsigned int delay);
34extern int __pm_runtime_set_status(struct device *dev, unsigned int status);
35extern int pm_runtime_barrier(struct device *dev);
36extern void pm_runtime_enable(struct device *dev);
37extern void __pm_runtime_disable(struct device *dev, bool check_resume);
38extern void pm_runtime_allow(struct device *dev);
39extern void pm_runtime_forbid(struct device *dev);
40extern int pm_generic_runtime_idle(struct device *dev);
41extern int pm_generic_runtime_suspend(struct device *dev);
42extern int pm_generic_runtime_resume(struct device *dev);
43extern void pm_runtime_no_callbacks(struct device *dev);
44extern void pm_runtime_irq_safe(struct device *dev);
45extern void __pm_runtime_use_autosuspend(struct device *dev, bool use);
46extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay);
47extern unsigned long pm_runtime_autosuspend_expiration(struct device *dev);
48
49static inline bool pm_children_suspended(struct device *dev)
50{
51 return dev->power.ignore_children
52 || !atomic_read(&dev->power.child_count);
53}
54
55static inline void pm_suspend_ignore_children(struct device *dev, bool enable)
56{
57 dev->power.ignore_children = enable;
58}
59
60static inline void pm_runtime_get_noresume(struct device *dev)
61{
62 atomic_inc(&dev->power.usage_count);
63}
64
65static inline void pm_runtime_put_noidle(struct device *dev)
66{
67 atomic_add_unless(&dev->power.usage_count, -1, 0);
68}
69
70static inline bool device_run_wake(struct device *dev)
71{
72 return dev->power.run_wake;
73}
74
75static inline void device_set_run_wake(struct device *dev, bool enable)
76{
77 dev->power.run_wake = enable;
78}
79
80static inline bool pm_runtime_suspended(struct device *dev)
81{
82 return dev->power.runtime_status == RPM_SUSPENDED
83 && !dev->power.disable_depth;
84}
85
86static inline bool pm_runtime_status_suspended(struct device *dev)
87{
88 return dev->power.runtime_status == RPM_SUSPENDED;
89}
90
91static inline bool pm_runtime_enabled(struct device *dev)
92{
93 return !dev->power.disable_depth;
94}
95
96static inline bool pm_runtime_callbacks_present(struct device *dev)
97{
98 return !dev->power.no_callbacks;
99}
100
101static inline void pm_runtime_mark_last_busy(struct device *dev)
102{
103 ACCESS_ONCE(dev->power.last_busy) = jiffies;
104}
105
106#else /* !CONFIG_PM_RUNTIME */
107
108static inline int __pm_runtime_idle(struct device *dev, int rpmflags)
109{
110 return -ENOSYS;
111}
112static inline int __pm_runtime_suspend(struct device *dev, int rpmflags)
113{
114 return -ENOSYS;
115}
116static inline int __pm_runtime_resume(struct device *dev, int rpmflags)
117{
118 return 1;
119}
120static inline int pm_schedule_suspend(struct device *dev, unsigned int delay)
121{
122 return -ENOSYS;
123}
124static inline int __pm_runtime_set_status(struct device *dev,
125 unsigned int status) { return 0; }
126static inline int pm_runtime_barrier(struct device *dev) { return 0; }
127static inline void pm_runtime_enable(struct device *dev) {}
128static inline void __pm_runtime_disable(struct device *dev, bool c) {}
129static inline void pm_runtime_allow(struct device *dev) {}
130static inline void pm_runtime_forbid(struct device *dev) {}
131
132static inline bool pm_children_suspended(struct device *dev) { return false; }
133static inline void pm_suspend_ignore_children(struct device *dev, bool en) {}
134static inline void pm_runtime_get_noresume(struct device *dev) {}
135static inline void pm_runtime_put_noidle(struct device *dev) {}
136static inline bool device_run_wake(struct device *dev) { return false; }
137static inline void device_set_run_wake(struct device *dev, bool enable) {}
138static inline bool pm_runtime_suspended(struct device *dev) { return false; }
139static inline bool pm_runtime_status_suspended(struct device *dev) { return false; }
140static inline bool pm_runtime_enabled(struct device *dev) { return false; }
141
142static inline int pm_generic_runtime_idle(struct device *dev) { return 0; }
143static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; }
144static inline int pm_generic_runtime_resume(struct device *dev) { return 0; }
145static inline void pm_runtime_no_callbacks(struct device *dev) {}
146static inline void pm_runtime_irq_safe(struct device *dev) {}
147
148static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; }
149static inline void pm_runtime_mark_last_busy(struct device *dev) {}
150static inline void __pm_runtime_use_autosuspend(struct device *dev,
151 bool use) {}
152static inline void pm_runtime_set_autosuspend_delay(struct device *dev,
153 int delay) {}
154static inline unsigned long pm_runtime_autosuspend_expiration(
155 struct device *dev) { return 0; }
156
157#endif /* !CONFIG_PM_RUNTIME */
158
159static inline int pm_runtime_idle(struct device *dev)
160{
161 return __pm_runtime_idle(dev, 0);
162}
163
164static inline int pm_runtime_suspend(struct device *dev)
165{
166 return __pm_runtime_suspend(dev, 0);
167}
168
169static inline int pm_runtime_autosuspend(struct device *dev)
170{
171 return __pm_runtime_suspend(dev, RPM_AUTO);
172}
173
174static inline int pm_runtime_resume(struct device *dev)
175{
176 return __pm_runtime_resume(dev, 0);
177}
178
179static inline int pm_request_idle(struct device *dev)
180{
181 return __pm_runtime_idle(dev, RPM_ASYNC);
182}
183
184static inline int pm_request_resume(struct device *dev)
185{
186 return __pm_runtime_resume(dev, RPM_ASYNC);
187}
188
189static inline int pm_request_autosuspend(struct device *dev)
190{
191 return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO);
192}
193
194static inline int pm_runtime_get(struct device *dev)
195{
196 return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC);
197}
198
199static inline int pm_runtime_get_sync(struct device *dev)
200{
201 return __pm_runtime_resume(dev, RPM_GET_PUT);
202}
203
204static inline int pm_runtime_put(struct device *dev)
205{
206 return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC);
207}
208
209static inline int pm_runtime_put_autosuspend(struct device *dev)
210{
211 return __pm_runtime_suspend(dev,
212 RPM_GET_PUT | RPM_ASYNC | RPM_AUTO);
213}
214
215static inline int pm_runtime_put_sync(struct device *dev)
216{
217 return __pm_runtime_idle(dev, RPM_GET_PUT);
218}
219
220static inline int pm_runtime_put_sync_suspend(struct device *dev)
221{
222 return __pm_runtime_suspend(dev, RPM_GET_PUT);
223}
224
225static inline int pm_runtime_put_sync_autosuspend(struct device *dev)
226{
227 return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO);
228}
229
230static inline int pm_runtime_set_active(struct device *dev)
231{
232 return __pm_runtime_set_status(dev, RPM_ACTIVE);
233}
234
235static inline void pm_runtime_set_suspended(struct device *dev)
236{
237 __pm_runtime_set_status(dev, RPM_SUSPENDED);
238}
239
240static inline void pm_runtime_disable(struct device *dev)
241{
242 __pm_runtime_disable(dev, true);
243}
244
245static inline void pm_runtime_use_autosuspend(struct device *dev)
246{
247 __pm_runtime_use_autosuspend(dev, true);
248}
249
250static inline void pm_runtime_dont_use_autosuspend(struct device *dev)
251{
252 __pm_runtime_use_autosuspend(dev, false);
253}
254
255#endif