2 * pm_runtime.h - Device run-time power management helper functions.
6 * This file is released under the GPLv2.
9 #ifndef _LINUX_PM_RUNTIME_H
10 #define _LINUX_PM_RUNTIME_H
12 #include <linux/device.h>
13 #include <linux/notifier.h>
16 #include <linux/jiffies.h>
18 /* Runtime PM flag argument bits */
19 #define RPM_ASYNC 0x01 /* Request is asynchronous */
20 #define RPM_NOWAIT 0x02 /* Don't wait for concurrent
22 #define RPM_GET_PUT 0x04 /* Increment/decrement the
24 #define RPM_AUTO 0x08 /* Use autosuspend_delay */
27 extern struct workqueue_struct *pm_wq;
29 static inline bool queue_pm_work(struct work_struct *work)
31 return queue_work(pm_wq, work);
34 extern int pm_generic_runtime_suspend(struct device *dev);
35 extern int pm_generic_runtime_resume(struct device *dev);
36 extern int pm_runtime_force_suspend(struct device *dev);
37 extern int pm_runtime_force_resume(struct device *dev);
39 extern int __pm_runtime_idle(struct device *dev, int rpmflags);
40 extern int __pm_runtime_suspend(struct device *dev, int rpmflags);
41 extern int __pm_runtime_resume(struct device *dev, int rpmflags);
42 extern int pm_runtime_get_if_in_use(struct device *dev);
43 extern int pm_schedule_suspend(struct device *dev, unsigned int delay);
44 extern int __pm_runtime_set_status(struct device *dev, unsigned int status);
45 extern int pm_runtime_barrier(struct device *dev);
46 extern void pm_runtime_enable(struct device *dev);
47 extern void __pm_runtime_disable(struct device *dev, bool check_resume);
48 extern void pm_runtime_allow(struct device *dev);
49 extern void pm_runtime_forbid(struct device *dev);
50 extern void pm_runtime_no_callbacks(struct device *dev);
51 extern void pm_runtime_irq_safe(struct device *dev);
52 extern void __pm_runtime_use_autosuspend(struct device *dev, bool use);
53 extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay);
54 extern u64 pm_runtime_autosuspend_expiration(struct device *dev);
55 extern void pm_runtime_update_max_time_suspended(struct device *dev,
57 extern void pm_runtime_set_memalloc_noio(struct device *dev, bool enable);
58 extern void pm_runtime_clean_up_links(struct device *dev);
59 extern void pm_runtime_get_suppliers(struct device *dev);
60 extern void pm_runtime_put_suppliers(struct device *dev);
61 extern void pm_runtime_new_link(struct device *dev);
62 extern void pm_runtime_drop_link(struct device *dev);
64 static inline void pm_suspend_ignore_children(struct device *dev, bool enable)
66 dev->power.ignore_children = enable;
69 static inline void pm_runtime_get_noresume(struct device *dev)
71 atomic_inc(&dev->power.usage_count);
74 static inline void pm_runtime_put_noidle(struct device *dev)
76 atomic_add_unless(&dev->power.usage_count, -1, 0);
79 static inline bool pm_runtime_suspended(struct device *dev)
81 return dev->power.runtime_status == RPM_SUSPENDED
82 && !dev->power.disable_depth;
85 static inline bool pm_runtime_active(struct device *dev)
87 return dev->power.runtime_status == RPM_ACTIVE
88 || dev->power.disable_depth;
91 static inline bool pm_runtime_status_suspended(struct device *dev)
93 return dev->power.runtime_status == RPM_SUSPENDED;
96 static inline bool pm_runtime_enabled(struct device *dev)
98 return !dev->power.disable_depth;
101 static inline bool pm_runtime_callbacks_present(struct device *dev)
103 return !dev->power.no_callbacks;
106 static inline void pm_runtime_mark_last_busy(struct device *dev)
108 WRITE_ONCE(dev->power.last_busy, ktime_get_mono_fast_ns());
111 static inline bool pm_runtime_is_irq_safe(struct device *dev)
113 return dev->power.irq_safe;
116 extern u64 pm_runtime_suspended_time(struct device *dev);
118 #else /* !CONFIG_PM */
120 static inline bool queue_pm_work(struct work_struct *work) { return false; }
122 static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; }
123 static inline int pm_generic_runtime_resume(struct device *dev) { return 0; }
124 static inline int pm_runtime_force_suspend(struct device *dev) { return 0; }
125 static inline int pm_runtime_force_resume(struct device *dev) { return 0; }
127 static inline int __pm_runtime_idle(struct device *dev, int rpmflags)
131 static inline int __pm_runtime_suspend(struct device *dev, int rpmflags)
135 static inline int __pm_runtime_resume(struct device *dev, int rpmflags)
139 static inline int pm_schedule_suspend(struct device *dev, unsigned int delay)
143 static inline int pm_runtime_get_if_in_use(struct device *dev)
147 static inline int __pm_runtime_set_status(struct device *dev,
148 unsigned int status) { return 0; }
149 static inline int pm_runtime_barrier(struct device *dev) { return 0; }
150 static inline void pm_runtime_enable(struct device *dev) {}
151 static inline void __pm_runtime_disable(struct device *dev, bool c) {}
152 static inline void pm_runtime_allow(struct device *dev) {}
153 static inline void pm_runtime_forbid(struct device *dev) {}
155 static inline void pm_suspend_ignore_children(struct device *dev, bool enable) {}
156 static inline void pm_runtime_get_noresume(struct device *dev) {}
157 static inline void pm_runtime_put_noidle(struct device *dev) {}
158 static inline bool pm_runtime_suspended(struct device *dev) { return false; }
159 static inline bool pm_runtime_active(struct device *dev) { return true; }
160 static inline bool pm_runtime_status_suspended(struct device *dev) { return false; }
161 static inline bool pm_runtime_enabled(struct device *dev) { return false; }
163 static inline void pm_runtime_no_callbacks(struct device *dev) {}
164 static inline void pm_runtime_irq_safe(struct device *dev) {}
165 static inline bool pm_runtime_is_irq_safe(struct device *dev) { return false; }
167 static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; }
168 static inline void pm_runtime_mark_last_busy(struct device *dev) {}
169 static inline void __pm_runtime_use_autosuspend(struct device *dev,
171 static inline void pm_runtime_set_autosuspend_delay(struct device *dev,
173 static inline u64 pm_runtime_autosuspend_expiration(
174 struct device *dev) { return 0; }
175 static inline void pm_runtime_set_memalloc_noio(struct device *dev,
177 static inline void pm_runtime_clean_up_links(struct device *dev) {}
178 static inline void pm_runtime_get_suppliers(struct device *dev) {}
179 static inline void pm_runtime_put_suppliers(struct device *dev) {}
180 static inline void pm_runtime_new_link(struct device *dev) {}
181 static inline void pm_runtime_drop_link(struct device *dev) {}
183 #endif /* !CONFIG_PM */
185 static inline int pm_runtime_idle(struct device *dev)
187 return __pm_runtime_idle(dev, 0);
190 static inline int pm_runtime_suspend(struct device *dev)
192 return __pm_runtime_suspend(dev, 0);
195 static inline int pm_runtime_autosuspend(struct device *dev)
197 return __pm_runtime_suspend(dev, RPM_AUTO);
200 static inline int pm_runtime_resume(struct device *dev)
202 return __pm_runtime_resume(dev, 0);
205 static inline int pm_request_idle(struct device *dev)
207 return __pm_runtime_idle(dev, RPM_ASYNC);
210 static inline int pm_request_resume(struct device *dev)
212 return __pm_runtime_resume(dev, RPM_ASYNC);
215 static inline int pm_request_autosuspend(struct device *dev)
217 return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO);
220 static inline int pm_runtime_get(struct device *dev)
222 return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC);
225 static inline int pm_runtime_get_sync(struct device *dev)
227 return __pm_runtime_resume(dev, RPM_GET_PUT);
230 static inline int pm_runtime_put(struct device *dev)
232 return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC);
235 static inline int pm_runtime_put_autosuspend(struct device *dev)
237 return __pm_runtime_suspend(dev,
238 RPM_GET_PUT | RPM_ASYNC | RPM_AUTO);
241 static inline int pm_runtime_put_sync(struct device *dev)
243 return __pm_runtime_idle(dev, RPM_GET_PUT);
246 static inline int pm_runtime_put_sync_suspend(struct device *dev)
248 return __pm_runtime_suspend(dev, RPM_GET_PUT);
251 static inline int pm_runtime_put_sync_autosuspend(struct device *dev)
253 return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO);
256 static inline int pm_runtime_set_active(struct device *dev)
258 return __pm_runtime_set_status(dev, RPM_ACTIVE);
261 static inline int pm_runtime_set_suspended(struct device *dev)
263 return __pm_runtime_set_status(dev, RPM_SUSPENDED);
266 static inline void pm_runtime_disable(struct device *dev)
268 __pm_runtime_disable(dev, true);
271 static inline void pm_runtime_use_autosuspend(struct device *dev)
273 __pm_runtime_use_autosuspend(dev, true);
276 static inline void pm_runtime_dont_use_autosuspend(struct device *dev)
278 __pm_runtime_use_autosuspend(dev, false);