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