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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * cpuidle.h - The internal header file
4 */
5
6#ifndef __DRIVER_CPUIDLE_H
7#define __DRIVER_CPUIDLE_H
8
9/* For internal use only */
10extern char param_governor[];
11extern struct cpuidle_governor *cpuidle_curr_governor;
12extern struct cpuidle_governor *cpuidle_prev_governor;
13extern struct list_head cpuidle_governors;
14extern struct list_head cpuidle_detected_devices;
15extern struct mutex cpuidle_lock;
16extern spinlock_t cpuidle_driver_lock;
17extern int cpuidle_disabled(void);
18extern int cpuidle_enter_state(struct cpuidle_device *dev,
19 struct cpuidle_driver *drv, int next_state);
20
21/* idle loop */
22extern void cpuidle_install_idle_handler(void);
23extern void cpuidle_uninstall_idle_handler(void);
24
25/* governors */
26extern struct cpuidle_governor *cpuidle_find_governor(const char *str);
27extern int cpuidle_switch_governor(struct cpuidle_governor *gov);
28
29/* sysfs */
30
31struct device;
32
33extern int cpuidle_add_interface(void);
34extern void cpuidle_remove_interface(struct device *dev);
35extern int cpuidle_add_device_sysfs(struct cpuidle_device *device);
36extern void cpuidle_remove_device_sysfs(struct cpuidle_device *device);
37extern int cpuidle_add_sysfs(struct cpuidle_device *dev);
38extern void cpuidle_remove_sysfs(struct cpuidle_device *dev);
39
40#ifdef CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED
41bool cpuidle_state_is_coupled(struct cpuidle_driver *drv, int state);
42int cpuidle_coupled_state_verify(struct cpuidle_driver *drv);
43int cpuidle_enter_state_coupled(struct cpuidle_device *dev,
44 struct cpuidle_driver *drv, int next_state);
45int cpuidle_coupled_register_device(struct cpuidle_device *dev);
46void cpuidle_coupled_unregister_device(struct cpuidle_device *dev);
47#else
48static inline
49bool cpuidle_state_is_coupled(struct cpuidle_driver *drv, int state)
50{
51 return false;
52}
53
54static inline int cpuidle_coupled_state_verify(struct cpuidle_driver *drv)
55{
56 return 0;
57}
58
59static inline int cpuidle_enter_state_coupled(struct cpuidle_device *dev,
60 struct cpuidle_driver *drv, int next_state)
61{
62 return -1;
63}
64
65static inline int cpuidle_coupled_register_device(struct cpuidle_device *dev)
66{
67 return 0;
68}
69
70static inline void cpuidle_coupled_unregister_device(struct cpuidle_device *dev)
71{
72}
73#endif
74
75#endif /* __DRIVER_CPUIDLE_H */