1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * pm_runtime.h - Device run-time power management helper functions.
8 #ifndef _LINUX_PM_RUNTIME_H
9 #define _LINUX_PM_RUNTIME_H
11 #include <linux/device.h>
12 #include <linux/notifier.h>
15 #include <linux/jiffies.h>
17 /* Runtime PM flag argument bits */
18 #define RPM_ASYNC 0x01 /* Request is asynchronous */
19 #define RPM_NOWAIT 0x02 /* Don't wait for concurrent
21 #define RPM_GET_PUT 0x04 /* Increment/decrement the
23 #define RPM_AUTO 0x08 /* Use autosuspend_delay */
26 extern struct workqueue_struct *pm_wq;
28 static inline bool queue_pm_work(struct work_struct *work)
30 return queue_work(pm_wq, work);
33 extern int pm_generic_runtime_suspend(struct device *dev);
34 extern int pm_generic_runtime_resume(struct device *dev);
35 extern int pm_runtime_force_suspend(struct device *dev);
36 extern int pm_runtime_force_resume(struct device *dev);
38 extern int __pm_runtime_idle(struct device *dev, int rpmflags);
39 extern int __pm_runtime_suspend(struct device *dev, int rpmflags);
40 extern int __pm_runtime_resume(struct device *dev, int rpmflags);
41 extern int pm_runtime_get_if_in_use(struct device *dev);
42 extern int pm_schedule_suspend(struct device *dev, unsigned int delay);
43 extern int __pm_runtime_set_status(struct device *dev, unsigned int status);
44 extern int pm_runtime_barrier(struct device *dev);
45 extern void pm_runtime_enable(struct device *dev);
46 extern void __pm_runtime_disable(struct device *dev, bool check_resume);
47 extern void pm_runtime_allow(struct device *dev);
48 extern void pm_runtime_forbid(struct device *dev);
49 extern void pm_runtime_no_callbacks(struct device *dev);
50 extern void pm_runtime_irq_safe(struct device *dev);
51 extern void __pm_runtime_use_autosuspend(struct device *dev, bool use);
52 extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay);
53 extern u64 pm_runtime_autosuspend_expiration(struct device *dev);
54 extern void pm_runtime_update_max_time_suspended(struct device *dev,
56 extern void pm_runtime_set_memalloc_noio(struct device *dev, bool enable);
57 extern void pm_runtime_clean_up_links(struct device *dev);
58 extern void pm_runtime_get_suppliers(struct device *dev);
59 extern void pm_runtime_put_suppliers(struct device *dev);
60 extern void pm_runtime_new_link(struct device *dev);
61 extern void pm_runtime_drop_link(struct device *dev);
63 static inline void pm_suspend_ignore_children(struct device *dev, bool enable)
65 dev->power.ignore_children = enable;
68 static inline void pm_runtime_get_noresume(struct device *dev)
70 atomic_inc(&dev->power.usage_count);
73 static inline void pm_runtime_put_noidle(struct device *dev)
75 atomic_add_unless(&dev->power.usage_count, -1, 0);
78 static inline bool pm_runtime_suspended(struct device *dev)
80 return dev->power.runtime_status == RPM_SUSPENDED
81 && !dev->power.disable_depth;
84 static inline bool pm_runtime_active(struct device *dev)
86 return dev->power.runtime_status == RPM_ACTIVE
87 || dev->power.disable_depth;
90 static inline bool pm_runtime_status_suspended(struct device *dev)
92 return dev->power.runtime_status == RPM_SUSPENDED;
95 static inline bool pm_runtime_enabled(struct device *dev)
97 return !dev->power.disable_depth;
100 static inline bool pm_runtime_callbacks_present(struct device *dev)
102 return !dev->power.no_callbacks;
105 static inline void pm_runtime_mark_last_busy(struct device *dev)
107 WRITE_ONCE(dev->power.last_busy, ktime_get_mono_fast_ns());
110 static inline bool pm_runtime_is_irq_safe(struct device *dev)
112 return dev->power.irq_safe;
115 extern u64 pm_runtime_suspended_time(struct device *dev);
117 #else /* !CONFIG_PM */
119 static inline bool queue_pm_work(struct work_struct *work) { return false; }
121 static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; }
122 static inline int pm_generic_runtime_resume(struct device *dev) { return 0; }
123 static inline int pm_runtime_force_suspend(struct device *dev) { return 0; }
124 static inline int pm_runtime_force_resume(struct device *dev) { return 0; }
126 static inline int __pm_runtime_idle(struct device *dev, int rpmflags)
130 static inline int __pm_runtime_suspend(struct device *dev, int rpmflags)
134 static inline int __pm_runtime_resume(struct device *dev, int rpmflags)
138 static inline int pm_schedule_suspend(struct device *dev, unsigned int delay)
142 static inline int pm_runtime_get_if_in_use(struct device *dev)
146 static inline int __pm_runtime_set_status(struct device *dev,
147 unsigned int status) { return 0; }
148 static inline int pm_runtime_barrier(struct device *dev) { return 0; }
149 static inline void pm_runtime_enable(struct device *dev) {}
150 static inline void __pm_runtime_disable(struct device *dev, bool c) {}
151 static inline void pm_runtime_allow(struct device *dev) {}
152 static inline void pm_runtime_forbid(struct device *dev) {}
154 static inline void pm_suspend_ignore_children(struct device *dev, bool enable) {}
155 static inline void pm_runtime_get_noresume(struct device *dev) {}
156 static inline void pm_runtime_put_noidle(struct device *dev) {}
157 static inline bool pm_runtime_suspended(struct device *dev) { return false; }
158 static inline bool pm_runtime_active(struct device *dev) { return true; }
159 static inline bool pm_runtime_status_suspended(struct device *dev) { return false; }
160 static inline bool pm_runtime_enabled(struct device *dev) { return false; }
162 static inline void pm_runtime_no_callbacks(struct device *dev) {}
163 static inline void pm_runtime_irq_safe(struct device *dev) {}
164 static inline bool pm_runtime_is_irq_safe(struct device *dev) { return false; }
166 static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; }
167 static inline void pm_runtime_mark_last_busy(struct device *dev) {}
168 static inline void __pm_runtime_use_autosuspend(struct device *dev,
170 static inline void pm_runtime_set_autosuspend_delay(struct device *dev,
172 static inline u64 pm_runtime_autosuspend_expiration(
173 struct device *dev) { return 0; }
174 static inline void pm_runtime_set_memalloc_noio(struct device *dev,
176 static inline void pm_runtime_clean_up_links(struct device *dev) {}
177 static inline void pm_runtime_get_suppliers(struct device *dev) {}
178 static inline void pm_runtime_put_suppliers(struct device *dev) {}
179 static inline void pm_runtime_new_link(struct device *dev) {}
180 static inline void pm_runtime_drop_link(struct device *dev) {}
182 #endif /* !CONFIG_PM */
184 static inline int pm_runtime_idle(struct device *dev)
186 return __pm_runtime_idle(dev, 0);
189 static inline int pm_runtime_suspend(struct device *dev)
191 return __pm_runtime_suspend(dev, 0);
194 static inline int pm_runtime_autosuspend(struct device *dev)
196 return __pm_runtime_suspend(dev, RPM_AUTO);
199 static inline int pm_runtime_resume(struct device *dev)
201 return __pm_runtime_resume(dev, 0);
204 static inline int pm_request_idle(struct device *dev)
206 return __pm_runtime_idle(dev, RPM_ASYNC);
209 static inline int pm_request_resume(struct device *dev)
211 return __pm_runtime_resume(dev, RPM_ASYNC);
214 static inline int pm_request_autosuspend(struct device *dev)
216 return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO);
219 static inline int pm_runtime_get(struct device *dev)
221 return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC);
224 static inline int pm_runtime_get_sync(struct device *dev)
226 return __pm_runtime_resume(dev, RPM_GET_PUT);
229 static inline int pm_runtime_put(struct device *dev)
231 return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC);
234 static inline int pm_runtime_put_autosuspend(struct device *dev)
236 return __pm_runtime_suspend(dev,
237 RPM_GET_PUT | RPM_ASYNC | RPM_AUTO);
240 static inline int pm_runtime_put_sync(struct device *dev)
242 return __pm_runtime_idle(dev, RPM_GET_PUT);
245 static inline int pm_runtime_put_sync_suspend(struct device *dev)
247 return __pm_runtime_suspend(dev, RPM_GET_PUT);
250 static inline int pm_runtime_put_sync_autosuspend(struct device *dev)
252 return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO);
255 static inline int pm_runtime_set_active(struct device *dev)
257 return __pm_runtime_set_status(dev, RPM_ACTIVE);
260 static inline int pm_runtime_set_suspended(struct device *dev)
262 return __pm_runtime_set_status(dev, RPM_SUSPENDED);
265 static inline void pm_runtime_disable(struct device *dev)
267 __pm_runtime_disable(dev, true);
270 static inline void pm_runtime_use_autosuspend(struct device *dev)
272 __pm_runtime_use_autosuspend(dev, true);
275 static inline void pm_runtime_dont_use_autosuspend(struct device *dev)
277 __pm_runtime_use_autosuspend(dev, false);