| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | /* |
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| 3 | * cpuidle.h - The internal header file |
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| 4 | */ |
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| 5 | |
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| 6 | #ifndef __DRIVER_CPUIDLE_H |
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| 7 | #define __DRIVER_CPUIDLE_H |
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| 8 | |
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| 9 | /* For internal use only */ |
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| 10 | extern char param_governor[]; |
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| 11 | extern struct cpuidle_governor *cpuidle_curr_governor; |
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| 12 | extern struct cpuidle_governor *cpuidle_prev_governor; |
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| 13 | extern struct list_head cpuidle_governors; |
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| 14 | extern struct list_head cpuidle_detected_devices; |
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| 15 | extern struct mutex cpuidle_lock; |
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| 16 | extern spinlock_t cpuidle_driver_lock; |
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| 17 | extern int cpuidle_disabled(void); |
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| 18 | extern int cpuidle_enter_state(struct cpuidle_device *dev, |
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| 19 | struct cpuidle_driver *drv, int next_state); |
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| 20 | |
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| 21 | /* idle loop */ |
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| 22 | extern void cpuidle_install_idle_handler(void); |
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| 23 | extern void cpuidle_uninstall_idle_handler(void); |
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| 24 | |
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| 25 | /* governors */ |
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| 26 | extern struct cpuidle_governor *cpuidle_find_governor(const char *str); |
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| 27 | extern int cpuidle_switch_governor(struct cpuidle_governor *gov); |
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| 28 | |
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| 29 | /* sysfs */ |
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| 30 | |
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| 31 | struct device; |
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| 32 | |
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| 33 | extern int cpuidle_add_interface(void); |
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| 34 | extern void cpuidle_remove_interface(struct device *dev); |
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| 35 | extern int cpuidle_add_device_sysfs(struct cpuidle_device *device); |
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| 36 | extern void cpuidle_remove_device_sysfs(struct cpuidle_device *device); |
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| 37 | extern int cpuidle_add_sysfs(struct cpuidle_device *dev); |
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| 38 | extern void cpuidle_remove_sysfs(struct cpuidle_device *dev); |
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| 39 | |
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| 40 | #ifdef CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED |
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| 41 | bool cpuidle_state_is_coupled(struct cpuidle_driver *drv, int state); |
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| 42 | int cpuidle_coupled_state_verify(struct cpuidle_driver *drv); |
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| 43 | int cpuidle_enter_state_coupled(struct cpuidle_device *dev, |
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| 44 | struct cpuidle_driver *drv, int next_state); |
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| 45 | int cpuidle_coupled_register_device(struct cpuidle_device *dev); |
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| 46 | void cpuidle_coupled_unregister_device(struct cpuidle_device *dev); |
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| 47 | #else |
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| 48 | static inline |
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| 49 | bool cpuidle_state_is_coupled(struct cpuidle_driver *drv, int state) |
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| 50 | { |
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| 51 | return false; |
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| 52 | } |
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| 53 | |
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| 54 | static inline int cpuidle_coupled_state_verify(struct cpuidle_driver *drv) |
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| 55 | { |
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| 56 | return 0; |
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| 57 | } |
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| 58 | |
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| 59 | static inline int cpuidle_enter_state_coupled(struct cpuidle_device *dev, |
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| 60 | struct cpuidle_driver *drv, int next_state) |
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| 61 | { |
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| 62 | return -1; |
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| 63 | } |
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| 64 | |
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| 65 | static inline int cpuidle_coupled_register_device(struct cpuidle_device *dev) |
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| 66 | { |
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| 67 | return 0; |
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| 68 | } |
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| 69 | |
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| 70 | static inline void cpuidle_coupled_unregister_device(struct cpuidle_device *dev) |
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| 71 | { |
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| 72 | } |
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| 73 | #endif |
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| 74 | |
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| 75 | #endif /* __DRIVER_CPUIDLE_H */ |
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| 76 | |
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