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_runtime_get_noresume(struct device *dev)
56{
57 atomic_inc(&dev->power.usage_count);
58}
59
60static inline void pm_runtime_put_noidle(struct device *dev)
61{
62 atomic_add_unless(&dev->power.usage_count, -1, 0);
63}
64
65static inline bool device_run_wake(struct device *dev)
66{
67 return dev->power.run_wake;
68}
69
70static inline void device_set_run_wake(struct device *dev, bool enable)
71{
72 dev->power.run_wake = enable;
73}
74
75static inline bool pm_runtime_suspended(struct device *dev)
76{
77 return dev->power.runtime_status == RPM_SUSPENDED
78 && !dev->power.disable_depth;
79}
80
81static inline bool pm_runtime_status_suspended(struct device *dev)
82{
83 return dev->power.runtime_status == RPM_SUSPENDED;
84}
85
86static inline bool pm_runtime_enabled(struct device *dev)
87{
88 return !dev->power.disable_depth;
89}
90
91static inline bool pm_runtime_callbacks_present(struct device *dev)
92{
93 return !dev->power.no_callbacks;
94}
95
96static inline void pm_runtime_mark_last_busy(struct device *dev)
97{
98 ACCESS_ONCE(dev->power.last_busy) = jiffies;
99}
100
101#else /* !CONFIG_PM_RUNTIME */
102
103static inline int __pm_runtime_idle(struct device *dev, int rpmflags)
104{
105 return -ENOSYS;
106}
107static inline int __pm_runtime_suspend(struct device *dev, int rpmflags)
108{
109 return -ENOSYS;
110}
111static inline int __pm_runtime_resume(struct device *dev, int rpmflags)
112{
113 return 1;
114}
115static inline int pm_schedule_suspend(struct device *dev, unsigned int delay)
116{
117 return -ENOSYS;
118}
119static inline int __pm_runtime_set_status(struct device *dev,
120 unsigned int status) { return 0; }
121static inline int pm_runtime_barrier(struct device *dev) { return 0; }
122static inline void pm_runtime_enable(struct device *dev) {}
123static inline void __pm_runtime_disable(struct device *dev, bool c) {}
124static inline void pm_runtime_allow(struct device *dev) {}
125static inline void pm_runtime_forbid(struct device *dev) {}
126
127static inline bool pm_children_suspended(struct device *dev) { return false; }
128static inline void pm_runtime_get_noresume(struct device *dev) {}
129static inline void pm_runtime_put_noidle(struct device *dev) {}
130static inline bool device_run_wake(struct device *dev) { return false; }
131static inline void device_set_run_wake(struct device *dev, bool enable) {}
132static inline bool pm_runtime_suspended(struct device *dev) { return false; }
133static inline bool pm_runtime_status_suspended(struct device *dev) { return false; }
134static inline bool pm_runtime_enabled(struct device *dev) { return false; }
135
136static inline int pm_generic_runtime_idle(struct device *dev) { return 0; }
137static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; }
138static inline int pm_generic_runtime_resume(struct device *dev) { return 0; }
139static inline void pm_runtime_no_callbacks(struct device *dev) {}
140static inline void pm_runtime_irq_safe(struct device *dev) {}
141
142static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; }
143static inline void pm_runtime_mark_last_busy(struct device *dev) {}
144static inline void __pm_runtime_use_autosuspend(struct device *dev,
145 bool use) {}
146static inline void pm_runtime_set_autosuspend_delay(struct device *dev,
147 int delay) {}
148static inline unsigned long pm_runtime_autosuspend_expiration(
149 struct device *dev) { return 0; }
150
151#endif /* !CONFIG_PM_RUNTIME */
152
153static inline int pm_runtime_idle(struct device *dev)
154{
155 return __pm_runtime_idle(dev, 0);
156}
157
158static inline int pm_runtime_suspend(struct device *dev)
159{
160 return __pm_runtime_suspend(dev, 0);
161}
162
163static inline int pm_runtime_autosuspend(struct device *dev)
164{
165 return __pm_runtime_suspend(dev, RPM_AUTO);
166}
167
168static inline int pm_runtime_resume(struct device *dev)
169{
170 return __pm_runtime_resume(dev, 0);
171}
172
173static inline int pm_request_idle(struct device *dev)
174{
175 return __pm_runtime_idle(dev, RPM_ASYNC);
176}
177
178static inline int pm_request_resume(struct device *dev)
179{
180 return __pm_runtime_resume(dev, RPM_ASYNC);
181}
182
183static inline int pm_request_autosuspend(struct device *dev)
184{
185 return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO);
186}
187
188static inline int pm_runtime_get(struct device *dev)
189{
190 return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC);
191}
192
193static inline int pm_runtime_get_sync(struct device *dev)
194{
195 return __pm_runtime_resume(dev, RPM_GET_PUT);
196}
197
198static inline int pm_runtime_put(struct device *dev)
199{
200 return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC);
201}
202
203static inline int pm_runtime_put_autosuspend(struct device *dev)
204{
205 return __pm_runtime_suspend(dev,
206 RPM_GET_PUT | RPM_ASYNC | RPM_AUTO);
207}
208
209static inline int pm_runtime_put_sync(struct device *dev)
210{
211 return __pm_runtime_idle(dev, RPM_GET_PUT);
212}
213
214static inline int pm_runtime_put_sync_suspend(struct device *dev)
215{
216 return __pm_runtime_suspend(dev, RPM_GET_PUT);
217}
218
219static inline int pm_runtime_put_sync_autosuspend(struct device *dev)
220{
221 return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO);
222}
223
224static inline int pm_runtime_set_active(struct device *dev)
225{
226 return __pm_runtime_set_status(dev, RPM_ACTIVE);
227}
228
229static inline void pm_runtime_set_suspended(struct device *dev)
230{
231 __pm_runtime_set_status(dev, RPM_SUSPENDED);
232}
233
234static inline void pm_runtime_disable(struct device *dev)
235{
236 __pm_runtime_disable(dev, true);
237}
238
239static inline void pm_runtime_use_autosuspend(struct device *dev)
240{
241 __pm_runtime_use_autosuspend(dev, true);
242}
243
244static inline void pm_runtime_dont_use_autosuspend(struct device *dev)
245{
246 __pm_runtime_use_autosuspend(dev, false);
247}
248
249#endif