projects/linux·blob da89fb16 · refs

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1/*
2 * pm_runtime.h - Device run-time power management helper functions.
3 *
4 * Copyright (C) 2009 Rafael J. Wysocki <[email protected]>
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
153#endif /* !CONFIG_PM_RUNTIME */
154
155static inline int pm_runtime_idle(struct device *dev)
156{
157 return __pm_runtime_idle(dev, 0);
158}
159
160static inline int pm_runtime_suspend(struct device *dev)
161{
162 return __pm_runtime_suspend(dev, 0);
163}
164
165static inline int pm_runtime_autosuspend(struct device *dev)
166{
167 return __pm_runtime_suspend(dev, RPM_AUTO);
168}
169
170static inline int pm_runtime_resume(struct device *dev)
171{
172 return __pm_runtime_resume(dev, 0);
173}
174
175static inline int pm_request_idle(struct device *dev)
176{
177 return __pm_runtime_idle(dev, RPM_ASYNC);
178}
179
180static inline int pm_request_resume(struct device *dev)
181{
182 return __pm_runtime_resume(dev, RPM_ASYNC);
183}
184
185static inline int pm_request_autosuspend(struct device *dev)
186{
187 return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO);
188}
189
190static inline int pm_runtime_get(struct device *dev)
191{
192 return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC);
193}
194
195static inline int pm_runtime_get_sync(struct device *dev)
196{
197 return __pm_runtime_resume(dev, RPM_GET_PUT);
198}
199
200static inline int pm_runtime_put(struct device *dev)
201{
202 return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC);
203}
204
205static inline int pm_runtime_put_autosuspend(struct device *dev)
206{
207 return __pm_runtime_suspend(dev,
208 RPM_GET_PUT | RPM_ASYNC | RPM_AUTO);
209}
210
211static inline int pm_runtime_put_sync(struct device *dev)
212{
213 return __pm_runtime_idle(dev, RPM_GET_PUT);
214}
215
216static inline int pm_runtime_put_sync_suspend(struct device *dev)
217{
218 return __pm_runtime_suspend(dev, RPM_GET_PUT);
219}
220
221static inline int pm_runtime_put_sync_autosuspend(struct device *dev)
222{
223 return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO);
224}
225
226static inline int pm_runtime_set_active(struct device *dev)
227{
228 return __pm_runtime_set_status(dev, RPM_ACTIVE);
229}
230
231static inline void pm_runtime_set_suspended(struct device *dev)
232{
233 __pm_runtime_set_status(dev, RPM_SUSPENDED);
234}
235
236static inline void pm_runtime_disable(struct device *dev)
237{
238 __pm_runtime_disable(dev, true);
239}
240
241static inline void pm_runtime_use_autosuspend(struct device *dev)
242{
243 __pm_runtime_use_autosuspend(dev, true);
244}
245
246static inline void pm_runtime_dont_use_autosuspend(struct device *dev)
247{
248 __pm_runtime_use_autosuspend(dev, false);
249}
250
251#endif