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Len Brown4f86d3a2007-10-03 18:58:00 -04001/*
2 * cpuidle.h - The internal header file
3 */
4
5#ifndef __DRIVER_CPUIDLE_H
6#define __DRIVER_CPUIDLE_H
7
Kay Sievers8a25a2f2011-12-21 14:29:42 -08008#include <linux/device.h>
Len Brown4f86d3a2007-10-03 18:58:00 -04009
10/* For internal use only */
11extern struct cpuidle_governor *cpuidle_curr_governor;
Len Brown4f86d3a2007-10-03 18:58:00 -040012extern struct list_head cpuidle_governors;
13extern struct list_head cpuidle_detected_devices;
14extern struct mutex cpuidle_lock;
15extern spinlock_t cpuidle_driver_lock;
Len Brown62027ae2011-04-01 18:13:10 -040016extern int cpuidle_disabled(void);
Colin Cross56cfbf72012-05-07 17:57:39 -070017extern int cpuidle_enter_state(struct cpuidle_device *dev,
18 struct cpuidle_driver *drv, int next_state);
Len Brown4f86d3a2007-10-03 18:58:00 -040019
20/* idle loop */
21extern void cpuidle_install_idle_handler(void);
22extern void cpuidle_uninstall_idle_handler(void);
23
24/* governors */
25extern int cpuidle_switch_governor(struct cpuidle_governor *gov);
26
27/* sysfs */
Kay Sievers8a25a2f2011-12-21 14:29:42 -080028extern int cpuidle_add_interface(struct device *dev);
29extern void cpuidle_remove_interface(struct device *dev);
Len Brown4f86d3a2007-10-03 18:58:00 -040030extern int cpuidle_add_state_sysfs(struct cpuidle_device *device);
31extern void cpuidle_remove_state_sysfs(struct cpuidle_device *device);
Kay Sievers8a25a2f2011-12-21 14:29:42 -080032extern int cpuidle_add_sysfs(struct device *dev);
33extern void cpuidle_remove_sysfs(struct device *dev);
Len Brown4f86d3a2007-10-03 18:58:00 -040034
Colin Cross4126c012012-05-07 17:57:41 -070035#ifdef CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED
36bool cpuidle_state_is_coupled(struct cpuidle_device *dev,
37 struct cpuidle_driver *drv, int state);
38int cpuidle_enter_state_coupled(struct cpuidle_device *dev,
39 struct cpuidle_driver *drv, int next_state);
40int cpuidle_coupled_register_device(struct cpuidle_device *dev);
41void cpuidle_coupled_unregister_device(struct cpuidle_device *dev);
42#else
43static inline bool cpuidle_state_is_coupled(struct cpuidle_device *dev,
44 struct cpuidle_driver *drv, int state)
45{
46 return false;
47}
48
49static inline int cpuidle_enter_state_coupled(struct cpuidle_device *dev,
50 struct cpuidle_driver *drv, int next_state)
51{
52 return -1;
53}
54
55static inline int cpuidle_coupled_register_device(struct cpuidle_device *dev)
56{
57 return 0;
58}
59
60static inline void cpuidle_coupled_unregister_device(struct cpuidle_device *dev)
61{
62}
63#endif
64
Len Brown4f86d3a2007-10-03 18:58:00 -040065#endif /* __DRIVER_CPUIDLE_H */