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 #ifdef CONFIG_PM_RUNTIME
17 extern struct workqueue_struct
*pm_wq
;
19 extern int pm_runtime_idle(struct device
*dev
);
20 extern int pm_runtime_suspend(struct device
*dev
);
21 extern int pm_runtime_resume(struct device
*dev
);
22 extern int pm_request_idle(struct device
*dev
);
23 extern int pm_schedule_suspend(struct device
*dev
, unsigned int delay
);
24 extern int pm_request_resume(struct device
*dev
);
25 extern int __pm_runtime_get(struct device
*dev
, bool sync
);
26 extern int __pm_runtime_put(struct device
*dev
, bool sync
);
27 extern int __pm_runtime_set_status(struct device
*dev
, unsigned int status
);
28 extern int pm_runtime_barrier(struct device
*dev
);
29 extern void pm_runtime_enable(struct device
*dev
);
30 extern void __pm_runtime_disable(struct device
*dev
, bool check_resume
);
31 extern void pm_runtime_allow(struct device
*dev
);
32 extern void pm_runtime_forbid(struct device
*dev
);
33 extern int pm_generic_runtime_idle(struct device
*dev
);
34 extern int pm_generic_runtime_suspend(struct device
*dev
);
35 extern int pm_generic_runtime_resume(struct device
*dev
);
37 static inline bool pm_children_suspended(struct device
*dev
)
39 return dev
->power
.ignore_children
40 || !atomic_read(&dev
->power
.child_count
);
43 static inline void pm_suspend_ignore_children(struct device
*dev
, bool enable
)
45 dev
->power
.ignore_children
= enable
;
48 static inline void pm_runtime_get_noresume(struct device
*dev
)
50 atomic_inc(&dev
->power
.usage_count
);
53 static inline void pm_runtime_put_noidle(struct device
*dev
)
55 atomic_add_unless(&dev
->power
.usage_count
, -1, 0);
58 static inline bool device_run_wake(struct device
*dev
)
60 return dev
->power
.run_wake
;
63 static inline void device_set_run_wake(struct device
*dev
, bool enable
)
65 dev
->power
.run_wake
= enable
;
68 static inline bool pm_runtime_suspended(struct device
*dev
)
70 return dev
->power
.runtime_status
== RPM_SUSPENDED
;
73 #else /* !CONFIG_PM_RUNTIME */
75 static inline int pm_runtime_idle(struct device
*dev
) { return -ENOSYS
; }
76 static inline int pm_runtime_suspend(struct device
*dev
) { return -ENOSYS
; }
77 static inline int pm_runtime_resume(struct device
*dev
) { return 0; }
78 static inline int pm_request_idle(struct device
*dev
) { return -ENOSYS
; }
79 static inline int pm_schedule_suspend(struct device
*dev
, unsigned int delay
)
83 static inline int pm_request_resume(struct device
*dev
) { return 0; }
84 static inline int __pm_runtime_get(struct device
*dev
, bool sync
) { return 1; }
85 static inline int __pm_runtime_put(struct device
*dev
, bool sync
) { return 0; }
86 static inline int __pm_runtime_set_status(struct device
*dev
,
87 unsigned int status
) { return 0; }
88 static inline int pm_runtime_barrier(struct device
*dev
) { return 0; }
89 static inline void pm_runtime_enable(struct device
*dev
) {}
90 static inline void __pm_runtime_disable(struct device
*dev
, bool c
) {}
91 static inline void pm_runtime_allow(struct device
*dev
) {}
92 static inline void pm_runtime_forbid(struct device
*dev
) {}
94 static inline bool pm_children_suspended(struct device
*dev
) { return false; }
95 static inline void pm_suspend_ignore_children(struct device
*dev
, bool en
) {}
96 static inline void pm_runtime_get_noresume(struct device
*dev
) {}
97 static inline void pm_runtime_put_noidle(struct device
*dev
) {}
98 static inline bool device_run_wake(struct device
*dev
) { return false; }
99 static inline void device_set_run_wake(struct device
*dev
, bool enable
) {}
100 static inline bool pm_runtime_suspended(struct device
*dev
) { return false; }
102 static inline int pm_generic_runtime_idle(struct device
*dev
) { return 0; }
103 static inline int pm_generic_runtime_suspend(struct device
*dev
) { return 0; }
104 static inline int pm_generic_runtime_resume(struct device
*dev
) { return 0; }
106 #endif /* !CONFIG_PM_RUNTIME */
108 static inline int pm_runtime_get(struct device
*dev
)
110 return __pm_runtime_get(dev
, false);
113 static inline int pm_runtime_get_sync(struct device
*dev
)
115 return __pm_runtime_get(dev
, true);
118 static inline int pm_runtime_put(struct device
*dev
)
120 return __pm_runtime_put(dev
, false);
123 static inline int pm_runtime_put_sync(struct device
*dev
)
125 return __pm_runtime_put(dev
, true);
128 static inline int pm_runtime_set_active(struct device
*dev
)
130 return __pm_runtime_set_status(dev
, RPM_ACTIVE
);
133 static inline void pm_runtime_set_suspended(struct device
*dev
)
135 __pm_runtime_set_status(dev
, RPM_SUSPENDED
);
138 static inline void pm_runtime_disable(struct device
*dev
)
140 __pm_runtime_disable(dev
, true);
This page took 0.033546 seconds and 5 git commands to generate.