Eric Lee / smarc-fsl-linux-kernel

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drivers/cpuidle/cpuidle.h 2.05 KB
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81f7e3824   Eric Lee   Initial Release, ... 
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  /* SPDX-License-Identifier: GPL-2.0 */
  /*
   * cpuidle.h - The internal header file
   */
  
  #ifndef __DRIVER_CPUIDLE_H
  #define __DRIVER_CPUIDLE_H
  
  /* For internal use only */
  extern struct cpuidle_governor *cpuidle_curr_governor;
  extern struct list_head cpuidle_governors;
  extern struct list_head cpuidle_detected_devices;
  extern struct mutex cpuidle_lock;
  extern spinlock_t cpuidle_driver_lock;
  extern int cpuidle_disabled(void);
  extern int cpuidle_enter_state(struct cpuidle_device *dev,
  		struct cpuidle_driver *drv, int next_state);
  
  /* idle loop */
  extern void cpuidle_install_idle_handler(void);
  extern void cpuidle_uninstall_idle_handler(void);
  
  /* governors */
  extern int cpuidle_switch_governor(struct cpuidle_governor *gov);
  
  /* sysfs */
  
  struct device;
  
  extern int cpuidle_add_interface(struct device *dev);
  extern void cpuidle_remove_interface(struct device *dev);
  extern int cpuidle_add_device_sysfs(struct cpuidle_device *device);
  extern void cpuidle_remove_device_sysfs(struct cpuidle_device *device);
  extern int cpuidle_add_sysfs(struct cpuidle_device *dev);
  extern void cpuidle_remove_sysfs(struct cpuidle_device *dev);
  
  #ifdef CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED
  bool cpuidle_state_is_coupled(struct cpuidle_driver *drv, int state);
  int cpuidle_coupled_state_verify(struct cpuidle_driver *drv);
  int cpuidle_enter_state_coupled(struct cpuidle_device *dev,
  		struct cpuidle_driver *drv, int next_state);
  int cpuidle_coupled_register_device(struct cpuidle_device *dev);
  void cpuidle_coupled_unregister_device(struct cpuidle_device *dev);
  #else
  static inline
  bool cpuidle_state_is_coupled(struct cpuidle_driver *drv, int state)
  {
  	return false;
  }
  
  static inline int cpuidle_coupled_state_verify(struct cpuidle_driver *drv)
  {
  	return 0;
  }
  
  static inline int cpuidle_enter_state_coupled(struct cpuidle_device *dev,
  		struct cpuidle_driver *drv, int next_state)
  {
  	return -1;
  }
  
  static inline int cpuidle_coupled_register_device(struct cpuidle_device *dev)
  {
  	return 0;
  }
  
  static inline void cpuidle_coupled_unregister_device(struct cpuidle_device *dev)
  {
  }
  #endif
  
  #endif /* __DRIVER_CPUIDLE_H */