2 * pm_runtime.h - Device run-time power management helper functions.
4 * Copyright (C) 2009 Rafael J. Wysocki <rjw@sisk.pl>
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>
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 */
25 #ifdef CONFIG_PM_RUNTIME
27 extern struct workqueue_struct *pm_wq;
29 extern int __pm_runtime_idle(struct device *dev, int rpmflags);
30 extern int __pm_runtime_suspend(struct device *dev, int rpmflags);
31 extern int __pm_runtime_resume(struct device *dev, int rpmflags);
32 extern int pm_schedule_suspend(struct device *dev, unsigned int delay);
33 extern int __pm_runtime_set_status(struct device *dev, unsigned int status);
34 extern int pm_runtime_barrier(struct device *dev);
35 extern void pm_runtime_enable(struct device *dev);
36 extern void __pm_runtime_disable(struct device *dev, bool check_resume);
37 extern void pm_runtime_allow(struct device *dev);
38 extern void pm_runtime_forbid(struct device *dev);
39 extern int pm_generic_runtime_idle(struct device *dev);
40 extern int pm_generic_runtime_suspend(struct device *dev);
41 extern int pm_generic_runtime_resume(struct device *dev);
42 extern void pm_runtime_no_callbacks(struct device *dev);
43 extern void pm_runtime_irq_safe(struct device *dev);
44 extern void __pm_runtime_use_autosuspend(struct device *dev, bool use);
45 extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay);
46 extern unsigned long pm_runtime_autosuspend_expiration(struct device *dev);
48 static inline bool pm_children_suspended(struct device *dev)
50 return dev->power.ignore_children
51 || !atomic_read(&dev->power.child_count);
54 static inline void pm_suspend_ignore_children(struct device *dev, bool enable)
56 dev->power.ignore_children = enable;
59 static inline void pm_runtime_get_noresume(struct device *dev)
61 atomic_inc(&dev->power.usage_count);
64 static inline void pm_runtime_put_noidle(struct device *dev)
66 atomic_add_unless(&dev->power.usage_count, -1, 0);
69 static inline bool device_run_wake(struct device *dev)
71 return dev->power.run_wake;
74 static inline void device_set_run_wake(struct device *dev, bool enable)
76 dev->power.run_wake = enable;
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_status_suspended(struct device *dev)
87 return dev->power.runtime_status == RPM_SUSPENDED;
90 static inline bool pm_runtime_enabled(struct device *dev)
92 return !dev->power.disable_depth;
95 static inline bool pm_runtime_callbacks_present(struct device *dev)
97 return !dev->power.no_callbacks;
100 static inline void pm_runtime_mark_last_busy(struct device *dev)
102 ACCESS_ONCE(dev->power.last_busy) = jiffies;
105 #else /* !CONFIG_PM_RUNTIME */
107 static inline int __pm_runtime_idle(struct device *dev, int rpmflags)
111 static inline int __pm_runtime_suspend(struct device *dev, int rpmflags)
115 static inline int __pm_runtime_resume(struct device *dev, int rpmflags)
119 static inline int pm_schedule_suspend(struct device *dev, unsigned int delay)
123 static inline int __pm_runtime_set_status(struct device *dev,
124 unsigned int status) { return 0; }
125 static inline int pm_runtime_barrier(struct device *dev) { return 0; }
126 static inline void pm_runtime_enable(struct device *dev) {}
127 static inline void __pm_runtime_disable(struct device *dev, bool c) {}
128 static inline void pm_runtime_allow(struct device *dev) {}
129 static inline void pm_runtime_forbid(struct device *dev) {}
131 static inline bool pm_children_suspended(struct device *dev) { return false; }
132 static inline void pm_suspend_ignore_children(struct device *dev, bool en) {}
133 static inline void pm_runtime_get_noresume(struct device *dev) {}
134 static inline void pm_runtime_put_noidle(struct device *dev) {}
135 static inline bool device_run_wake(struct device *dev) { return false; }
136 static inline void device_set_run_wake(struct device *dev, bool enable) {}
137 static inline bool pm_runtime_suspended(struct device *dev) { return false; }
138 static inline bool pm_runtime_status_suspended(struct device *dev) { return false; }
139 static inline bool pm_runtime_enabled(struct device *dev) { return false; }
141 static inline int pm_generic_runtime_idle(struct device *dev) { return 0; }
142 static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; }
143 static inline int pm_generic_runtime_resume(struct device *dev) { return 0; }
144 static inline void pm_runtime_no_callbacks(struct device *dev) {}
145 static inline void pm_runtime_irq_safe(struct device *dev) {}
147 static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; }
148 static inline void pm_runtime_mark_last_busy(struct device *dev) {}
149 static inline void __pm_runtime_use_autosuspend(struct device *dev,
151 static inline void pm_runtime_set_autosuspend_delay(struct device *dev,
153 static inline unsigned long pm_runtime_autosuspend_expiration(
154 struct device *dev) { return 0; }
156 #endif /* !CONFIG_PM_RUNTIME */
158 static inline int pm_runtime_idle(struct device *dev)
160 return __pm_runtime_idle(dev, 0);
163 static inline int pm_runtime_suspend(struct device *dev)
165 return __pm_runtime_suspend(dev, 0);
168 static inline int pm_runtime_autosuspend(struct device *dev)
170 return __pm_runtime_suspend(dev, RPM_AUTO);
173 static inline int pm_runtime_resume(struct device *dev)
175 return __pm_runtime_resume(dev, 0);
178 static inline int pm_request_idle(struct device *dev)
180 return __pm_runtime_idle(dev, RPM_ASYNC);
183 static inline int pm_request_resume(struct device *dev)
185 return __pm_runtime_resume(dev, RPM_ASYNC);
188 static inline int pm_request_autosuspend(struct device *dev)
190 return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO);
193 static inline int pm_runtime_get(struct device *dev)
195 return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC);
198 static inline int pm_runtime_get_sync(struct device *dev)
200 return __pm_runtime_resume(dev, RPM_GET_PUT);
203 static inline int pm_runtime_put(struct device *dev)
205 return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC);
208 static inline int pm_runtime_put_autosuspend(struct device *dev)
210 return __pm_runtime_suspend(dev,
211 RPM_GET_PUT | RPM_ASYNC | RPM_AUTO);
214 static inline int pm_runtime_put_sync(struct device *dev)
216 return __pm_runtime_idle(dev, RPM_GET_PUT);
219 static inline int pm_runtime_put_sync_suspend(struct device *dev)
221 return __pm_runtime_suspend(dev, RPM_GET_PUT);
224 static inline int pm_runtime_put_sync_autosuspend(struct device *dev)
226 return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO);
229 static inline int pm_runtime_set_active(struct device *dev)
231 return __pm_runtime_set_status(dev, RPM_ACTIVE);
234 static inline void pm_runtime_set_suspended(struct device *dev)
236 __pm_runtime_set_status(dev, RPM_SUSPENDED);
239 static inline void pm_runtime_disable(struct device *dev)
241 __pm_runtime_disable(dev, true);
244 static inline void pm_runtime_use_autosuspend(struct device *dev)
246 __pm_runtime_use_autosuspend(dev, true);
249 static inline void pm_runtime_dont_use_autosuspend(struct device *dev)
251 __pm_runtime_use_autosuspend(dev, false);
254 struct pm_clk_notifier_block {
255 struct notifier_block nb;
256 struct dev_pm_domain *pm_domain;
261 extern int pm_clk_init(struct device *dev);
262 extern void pm_clk_destroy(struct device *dev);
263 extern int pm_clk_add(struct device *dev, const char *con_id);
264 extern void pm_clk_remove(struct device *dev, const char *con_id);
265 extern int pm_clk_suspend(struct device *dev);
266 extern int pm_clk_resume(struct device *dev);
268 static inline int pm_clk_init(struct device *dev)
272 static inline void pm_clk_destroy(struct device *dev)
275 static inline int pm_clk_add(struct device *dev, const char *con_id)
279 static inline void pm_clk_remove(struct device *dev, const char *con_id)
282 #define pm_clk_suspend NULL
283 #define pm_clk_resume NULL
286 #ifdef CONFIG_HAVE_CLK
287 extern void pm_clk_add_notifier(struct bus_type *bus,
288 struct pm_clk_notifier_block *clknb);
290 static inline void pm_clk_add_notifier(struct bus_type *bus,
291 struct pm_clk_notifier_block *clknb)