Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
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_enabled(struct device *dev)
86{
87 return !dev->power.disable_depth;
88}
89
90static inline bool pm_runtime_callbacks_present(struct device *dev)
91{
92 return !dev->power.no_callbacks;
93}
94
95static inline void pm_runtime_mark_last_busy(struct device *dev)
96{
97 ACCESS_ONCE(dev->power.last_busy) = jiffies;
98}
99
100#else /* !CONFIG_PM_RUNTIME */
101
102static inline int __pm_runtime_idle(struct device *dev, int rpmflags)
103{
104 return -ENOSYS;
105}
106static inline int __pm_runtime_suspend(struct device *dev, int rpmflags)
107{
108 return -ENOSYS;
109}
110static inline int __pm_runtime_resume(struct device *dev, int rpmflags)
111{
112 return 1;
113}
114static inline int pm_schedule_suspend(struct device *dev, unsigned int delay)
115{
116 return -ENOSYS;
117}
118static inline int __pm_runtime_set_status(struct device *dev,
119 unsigned int status) { return 0; }
120static inline int pm_runtime_barrier(struct device *dev) { return 0; }
121static inline void pm_runtime_enable(struct device *dev) {}
122static inline void __pm_runtime_disable(struct device *dev, bool c) {}
123static inline void pm_runtime_allow(struct device *dev) {}
124static inline void pm_runtime_forbid(struct device *dev) {}
125
126static inline bool pm_children_suspended(struct device *dev) { return false; }
127static inline void pm_suspend_ignore_children(struct device *dev, bool en) {}
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_enabled(struct device *dev) { return false; }
134
135static inline int pm_generic_runtime_idle(struct device *dev) { return 0; }
136static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; }
137static inline int pm_generic_runtime_resume(struct device *dev) { return 0; }
138static inline void pm_runtime_no_callbacks(struct device *dev) {}
139static inline void pm_runtime_irq_safe(struct device *dev) {}
140
141static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; }
142static inline void pm_runtime_mark_last_busy(struct device *dev) {}
143static inline void __pm_runtime_use_autosuspend(struct device *dev,
144 bool use) {}
145static inline void pm_runtime_set_autosuspend_delay(struct device *dev,
146 int delay) {}
147static inline unsigned long pm_runtime_autosuspend_expiration(
148 struct device *dev) { return 0; }
149
150#endif /* !CONFIG_PM_RUNTIME */
151
152static inline int pm_runtime_idle(struct device *dev)
153{
154 return __pm_runtime_idle(dev, 0);
155}
156
157static inline int pm_runtime_suspend(struct device *dev)
158{
159 return __pm_runtime_suspend(dev, 0);
160}
161
162static inline int pm_runtime_autosuspend(struct device *dev)
163{
164 return __pm_runtime_suspend(dev, RPM_AUTO);
165}
166
167static inline int pm_runtime_resume(struct device *dev)
168{
169 return __pm_runtime_resume(dev, 0);
170}
171
172static inline int pm_request_idle(struct device *dev)
173{
174 return __pm_runtime_idle(dev, RPM_ASYNC);
175}
176
177static inline int pm_request_resume(struct device *dev)
178{
179 return __pm_runtime_resume(dev, RPM_ASYNC);
180}
181
182static inline int pm_request_autosuspend(struct device *dev)
183{
184 return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO);
185}
186
187static inline int pm_runtime_get(struct device *dev)
188{
189 return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC);
190}
191
192static inline int pm_runtime_get_sync(struct device *dev)
193{
194 return __pm_runtime_resume(dev, RPM_GET_PUT);
195}
196
197static inline int pm_runtime_put(struct device *dev)
198{
199 return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC);
200}
201
202static inline int pm_runtime_put_autosuspend(struct device *dev)
203{
204 return __pm_runtime_suspend(dev,
205 RPM_GET_PUT | RPM_ASYNC | RPM_AUTO);
206}
207
208static inline int pm_runtime_put_sync(struct device *dev)
209{
210 return __pm_runtime_idle(dev, RPM_GET_PUT);
211}
212
213static inline int pm_runtime_put_sync_suspend(struct device *dev)
214{
215 return __pm_runtime_suspend(dev, RPM_GET_PUT);
216}
217
218static inline int pm_runtime_put_sync_autosuspend(struct device *dev)
219{
220 return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO);
221}
222
223static inline int pm_runtime_set_active(struct device *dev)
224{
225 return __pm_runtime_set_status(dev, RPM_ACTIVE);
226}
227
228static inline void pm_runtime_set_suspended(struct device *dev)
229{
230 __pm_runtime_set_status(dev, RPM_SUSPENDED);
231}
232
233static inline void pm_runtime_disable(struct device *dev)
234{
235 __pm_runtime_disable(dev, true);
236}
237
238static inline void pm_runtime_use_autosuspend(struct device *dev)
239{
240 __pm_runtime_use_autosuspend(dev, true);
241}
242
243static inline void pm_runtime_dont_use_autosuspend(struct device *dev)
244{
245 __pm_runtime_use_autosuspend(dev, false);
246}
247
248struct pm_clk_notifier_block {
249 struct notifier_block nb;
250 struct dev_power_domain *pwr_domain;
251 char *con_ids[];
252};
253
254#ifdef CONFIG_PM_RUNTIME_CLK
255extern int pm_runtime_clk_init(struct device *dev);
256extern void pm_runtime_clk_destroy(struct device *dev);
257extern int pm_runtime_clk_add(struct device *dev, const char *con_id);
258extern void pm_runtime_clk_remove(struct device *dev, const char *con_id);
259extern int pm_runtime_clk_suspend(struct device *dev);
260extern int pm_runtime_clk_resume(struct device *dev);
261#else
262static inline int pm_runtime_clk_init(struct device *dev)
263{
264 return -EINVAL;
265}
266static inline void pm_runtime_clk_destroy(struct device *dev)
267{
268}
269static inline int pm_runtime_clk_add(struct device *dev, const char *con_id)
270{
271 return -EINVAL;
272}
273static inline void pm_runtime_clk_remove(struct device *dev, const char *con_id)
274{
275}
276#define pm_runtime_clock_suspend NULL
277#define pm_runtime_clock_resume NULL
278#endif
279
280#ifdef CONFIG_HAVE_CLK
281extern void pm_runtime_clk_add_notifier(struct bus_type *bus,
282 struct pm_clk_notifier_block *clknb);
283#else
284static inline void pm_runtime_clk_add_notifier(struct bus_type *bus,
285 struct pm_clk_notifier_block *clknb)
286{
287}
288#endif
289
290#endif