Linux kernel mirror (for testing)
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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_irq_safe(struct device *dev);
44extern void __pm_runtime_use_autosuspend(struct device *dev, bool use);
45extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay);
46extern unsigned long pm_runtime_autosuspend_expiration(struct device *dev);
47
48static inline bool pm_children_suspended(struct device *dev)
49{
50 return dev->power.ignore_children
51 || !atomic_read(&dev->power.child_count);
52}
53
54static inline void pm_suspend_ignore_children(struct device *dev, bool enable)
55{
56 dev->power.ignore_children = enable;
57}
58
59static inline void pm_runtime_get_noresume(struct device *dev)
60{
61 atomic_inc(&dev->power.usage_count);
62}
63
64static inline void pm_runtime_put_noidle(struct device *dev)
65{
66 atomic_add_unless(&dev->power.usage_count, -1, 0);
67}
68
69static inline bool device_run_wake(struct device *dev)
70{
71 return dev->power.run_wake;
72}
73
74static inline void device_set_run_wake(struct device *dev, bool enable)
75{
76 dev->power.run_wake = enable;
77}
78
79static inline bool pm_runtime_suspended(struct device *dev)
80{
81 return dev->power.runtime_status == RPM_SUSPENDED
82 && !dev->power.disable_depth;
83}
84
85static inline bool pm_runtime_status_suspended(struct device *dev)
86{
87 return dev->power.runtime_status == RPM_SUSPENDED;
88}
89
90static inline bool pm_runtime_enabled(struct device *dev)
91{
92 return !dev->power.disable_depth;
93}
94
95static inline bool pm_runtime_callbacks_present(struct device *dev)
96{
97 return !dev->power.no_callbacks;
98}
99
100static inline void pm_runtime_mark_last_busy(struct device *dev)
101{
102 ACCESS_ONCE(dev->power.last_busy) = jiffies;
103}
104
105#else /* !CONFIG_PM_RUNTIME */
106
107static inline int __pm_runtime_idle(struct device *dev, int rpmflags)
108{
109 return -ENOSYS;
110}
111static inline int __pm_runtime_suspend(struct device *dev, int rpmflags)
112{
113 return -ENOSYS;
114}
115static inline int __pm_runtime_resume(struct device *dev, int rpmflags)
116{
117 return 1;
118}
119static inline int pm_schedule_suspend(struct device *dev, unsigned int delay)
120{
121 return -ENOSYS;
122}
123static inline int __pm_runtime_set_status(struct device *dev,
124 unsigned int status) { return 0; }
125static inline int pm_runtime_barrier(struct device *dev) { return 0; }
126static inline void pm_runtime_enable(struct device *dev) {}
127static inline void __pm_runtime_disable(struct device *dev, bool c) {}
128static inline void pm_runtime_allow(struct device *dev) {}
129static inline void pm_runtime_forbid(struct device *dev) {}
130
131static inline bool pm_children_suspended(struct device *dev) { return false; }
132static inline void pm_suspend_ignore_children(struct device *dev, bool en) {}
133static inline void pm_runtime_get_noresume(struct device *dev) {}
134static inline void pm_runtime_put_noidle(struct device *dev) {}
135static inline bool device_run_wake(struct device *dev) { return false; }
136static inline void device_set_run_wake(struct device *dev, bool enable) {}
137static inline bool pm_runtime_suspended(struct device *dev) { return false; }
138static inline bool pm_runtime_status_suspended(struct device *dev) { return false; }
139static inline bool pm_runtime_enabled(struct device *dev) { return false; }
140
141static inline int pm_generic_runtime_idle(struct device *dev) { return 0; }
142static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; }
143static inline int pm_generic_runtime_resume(struct device *dev) { return 0; }
144static inline void pm_runtime_no_callbacks(struct device *dev) {}
145static inline void pm_runtime_irq_safe(struct device *dev) {}
146
147static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; }
148static inline void pm_runtime_mark_last_busy(struct device *dev) {}
149static inline void __pm_runtime_use_autosuspend(struct device *dev,
150 bool use) {}
151static inline void pm_runtime_set_autosuspend_delay(struct device *dev,
152 int delay) {}
153static inline unsigned long pm_runtime_autosuspend_expiration(
154 struct device *dev) { return 0; }
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
254struct pm_clk_notifier_block {
255 struct notifier_block nb;
256 struct dev_pm_domain *pm_domain;
257 char *con_ids[];
258};
259
260#ifdef CONFIG_PM_CLK
261extern int pm_clk_init(struct device *dev);
262extern void pm_clk_destroy(struct device *dev);
263extern int pm_clk_add(struct device *dev, const char *con_id);
264extern void pm_clk_remove(struct device *dev, const char *con_id);
265extern int pm_clk_suspend(struct device *dev);
266extern int pm_clk_resume(struct device *dev);
267#else
268static inline int pm_clk_init(struct device *dev)
269{
270 return -EINVAL;
271}
272static inline void pm_clk_destroy(struct device *dev)
273{
274}
275static inline int pm_clk_add(struct device *dev, const char *con_id)
276{
277 return -EINVAL;
278}
279static inline void pm_clk_remove(struct device *dev, const char *con_id)
280{
281}
282#define pm_clk_suspend NULL
283#define pm_clk_resume NULL
284#endif
285
286#ifdef CONFIG_HAVE_CLK
287extern void pm_clk_add_notifier(struct bus_type *bus,
288 struct pm_clk_notifier_block *clknb);
289#else
290static inline void pm_clk_add_notifier(struct bus_type *bus,
291 struct pm_clk_notifier_block *clknb)
292{
293}
294#endif
295
296#endif