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);
48extern void pm_runtime_update_max_time_suspended(struct device *dev,
49 s64 delta_ns);
50
51static inline bool pm_children_suspended(struct device *dev)
52{
53 return dev->power.ignore_children
54 || !atomic_read(&dev->power.child_count);
55}
56
57static inline void pm_runtime_get_noresume(struct device *dev)
58{
59 atomic_inc(&dev->power.usage_count);
60}
61
62static inline void pm_runtime_put_noidle(struct device *dev)
63{
64 atomic_add_unless(&dev->power.usage_count, -1, 0);
65}
66
67static inline bool device_run_wake(struct device *dev)
68{
69 return dev->power.run_wake;
70}
71
72static inline void device_set_run_wake(struct device *dev, bool enable)
73{
74 dev->power.run_wake = enable;
75}
76
77static inline bool pm_runtime_suspended(struct device *dev)
78{
79 return dev->power.runtime_status == RPM_SUSPENDED
80 && !dev->power.disable_depth;
81}
82
83static inline bool pm_runtime_status_suspended(struct device *dev)
84{
85 return dev->power.runtime_status == RPM_SUSPENDED;
86}
87
88static inline bool pm_runtime_enabled(struct device *dev)
89{
90 return !dev->power.disable_depth;
91}
92
93static inline bool pm_runtime_callbacks_present(struct device *dev)
94{
95 return !dev->power.no_callbacks;
96}
97
98static inline void pm_runtime_mark_last_busy(struct device *dev)
99{
100 ACCESS_ONCE(dev->power.last_busy) = jiffies;
101}
102
103#else /* !CONFIG_PM_RUNTIME */
104
105static inline int __pm_runtime_idle(struct device *dev, int rpmflags)
106{
107 return -ENOSYS;
108}
109static inline int __pm_runtime_suspend(struct device *dev, int rpmflags)
110{
111 return -ENOSYS;
112}
113static inline int __pm_runtime_resume(struct device *dev, int rpmflags)
114{
115 return 1;
116}
117static inline int pm_schedule_suspend(struct device *dev, unsigned int delay)
118{
119 return -ENOSYS;
120}
121static inline int __pm_runtime_set_status(struct device *dev,
122 unsigned int status) { return 0; }
123static inline int pm_runtime_barrier(struct device *dev) { return 0; }
124static inline void pm_runtime_enable(struct device *dev) {}
125static inline void __pm_runtime_disable(struct device *dev, bool c) {}
126static inline void pm_runtime_allow(struct device *dev) {}
127static inline void pm_runtime_forbid(struct device *dev) {}
128
129static inline bool pm_children_suspended(struct device *dev) { return false; }
130static inline void pm_runtime_get_noresume(struct device *dev) {}
131static inline void pm_runtime_put_noidle(struct device *dev) {}
132static inline bool device_run_wake(struct device *dev) { return false; }
133static inline void device_set_run_wake(struct device *dev, bool enable) {}
134static inline bool pm_runtime_suspended(struct device *dev) { return false; }
135static inline bool pm_runtime_status_suspended(struct device *dev) { return false; }
136static inline bool pm_runtime_enabled(struct device *dev) { return false; }
137
138static inline int pm_generic_runtime_idle(struct device *dev) { return 0; }
139static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; }
140static inline int pm_generic_runtime_resume(struct device *dev) { return 0; }
141static inline void pm_runtime_no_callbacks(struct device *dev) {}
142static inline void pm_runtime_irq_safe(struct device *dev) {}
143
144static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; }
145static inline void pm_runtime_mark_last_busy(struct device *dev) {}
146static inline void __pm_runtime_use_autosuspend(struct device *dev,
147 bool use) {}
148static inline void pm_runtime_set_autosuspend_delay(struct device *dev,
149 int delay) {}
150static inline unsigned long pm_runtime_autosuspend_expiration(
151 struct device *dev) { return 0; }
152
153static inline void pm_runtime_update_max_time_suspended(struct device *dev,
154 s64 delta_ns) {}
155
156#endif /* !CONFIG_PM_RUNTIME */
157
158static inline int pm_runtime_idle(struct device *dev)
159{
160 return __pm_runtime_idle(dev, 0);
161}
162
163static inline int pm_runtime_suspend(struct device *dev)
164{
165 return __pm_runtime_suspend(dev, 0);
166}
167
168static inline int pm_runtime_autosuspend(struct device *dev)
169{
170 return __pm_runtime_suspend(dev, RPM_AUTO);
171}
172
173static inline int pm_runtime_resume(struct device *dev)
174{
175 return __pm_runtime_resume(dev, 0);
176}
177
178static inline int pm_request_idle(struct device *dev)
179{
180 return __pm_runtime_idle(dev, RPM_ASYNC);
181}
182
183static inline int pm_request_resume(struct device *dev)
184{
185 return __pm_runtime_resume(dev, RPM_ASYNC);
186}
187
188static inline int pm_request_autosuspend(struct device *dev)
189{
190 return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO);
191}
192
193static inline int pm_runtime_get(struct device *dev)
194{
195 return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC);
196}
197
198static inline int pm_runtime_get_sync(struct device *dev)
199{
200 return __pm_runtime_resume(dev, RPM_GET_PUT);
201}
202
203static inline int pm_runtime_put(struct device *dev)
204{
205 return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC);
206}
207
208static inline int pm_runtime_put_autosuspend(struct device *dev)
209{
210 return __pm_runtime_suspend(dev,
211 RPM_GET_PUT | RPM_ASYNC | RPM_AUTO);
212}
213
214static inline int pm_runtime_put_sync(struct device *dev)
215{
216 return __pm_runtime_idle(dev, RPM_GET_PUT);
217}
218
219static inline int pm_runtime_put_sync_suspend(struct device *dev)
220{
221 return __pm_runtime_suspend(dev, RPM_GET_PUT);
222}
223
224static inline int pm_runtime_put_sync_autosuspend(struct device *dev)
225{
226 return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO);
227}
228
229static inline int pm_runtime_set_active(struct device *dev)
230{
231 return __pm_runtime_set_status(dev, RPM_ACTIVE);
232}
233
234static inline void pm_runtime_set_suspended(struct device *dev)
235{
236 __pm_runtime_set_status(dev, RPM_SUSPENDED);
237}
238
239static inline void pm_runtime_disable(struct device *dev)
240{
241 __pm_runtime_disable(dev, true);
242}
243
244static inline void pm_runtime_use_autosuspend(struct device *dev)
245{
246 __pm_runtime_use_autosuspend(dev, true);
247}
248
249static inline void pm_runtime_dont_use_autosuspend(struct device *dev)
250{
251 __pm_runtime_use_autosuspend(dev, false);
252}
253
254#endif