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