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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/drivers/cpuidle/cpuidle.h
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/* SPDX-License-Identifier: GPL-2.0 */

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/*

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 * cpuidle.h - The internal header file

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 */

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#ifndef __DRIVER_CPUIDLE_H

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#define __DRIVER_CPUIDLE_H

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/* For internal use only */

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extern char param_governor[];

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extern struct cpuidle_governor *cpuidle_curr_governor;

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extern struct cpuidle_governor *cpuidle_prev_governor;

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extern struct list_head cpuidle_governors;

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extern struct list_head cpuidle_detected_devices;

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extern struct mutex cpuidle_lock;

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extern spinlock_t cpuidle_driver_lock;

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extern int cpuidle_disabled(void);

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extern int cpuidle_enter_state(struct cpuidle_device *dev,

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		struct cpuidle_driver *drv, int next_state);

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/* idle loop */

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extern void cpuidle_install_idle_handler(void);

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extern void cpuidle_uninstall_idle_handler(void);

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/* governors */

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extern struct cpuidle_governor *cpuidle_find_governor(const char *str);

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extern int cpuidle_switch_governor(struct cpuidle_governor *gov);

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/* sysfs */

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struct device;

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extern int cpuidle_add_interface(void);

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extern void cpuidle_remove_interface(struct device *dev);

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extern int cpuidle_add_device_sysfs(struct cpuidle_device *device);

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extern void cpuidle_remove_device_sysfs(struct cpuidle_device *device);

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extern int cpuidle_add_sysfs(struct cpuidle_device *dev);

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extern void cpuidle_remove_sysfs(struct cpuidle_device *dev);

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#ifdef CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED

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bool cpuidle_state_is_coupled(struct cpuidle_driver *drv, int state);

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int cpuidle_coupled_state_verify(struct cpuidle_driver *drv);

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int cpuidle_enter_state_coupled(struct cpuidle_device *dev,

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		struct cpuidle_driver *drv, int next_state);

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int cpuidle_coupled_register_device(struct cpuidle_device *dev);

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void cpuidle_coupled_unregister_device(struct cpuidle_device *dev);

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#else

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static inline

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bool cpuidle_state_is_coupled(struct cpuidle_driver *drv, int state)

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{

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	return false;

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}

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static inline int cpuidle_coupled_state_verify(struct cpuidle_driver *drv)

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{

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	return 0;

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}

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static inline int cpuidle_enter_state_coupled(struct cpuidle_device *dev,

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		struct cpuidle_driver *drv, int next_state)

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{

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	return -1;

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}

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static inline int cpuidle_coupled_register_device(struct cpuidle_device *dev)

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{

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	return 0;

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}

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static inline void cpuidle_coupled_unregister_device(struct cpuidle_device *dev)

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{

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}

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#endif

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#endif /* __DRIVER_CPUIDLE_H */

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