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