drivers/cpuidle/cpuidle.h

   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_driver *drv, int state);
  38 int cpuidle_coupled_state_verify(struct cpuidle_driver *drv);
  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
  45 bool cpuidle_state_is_coupled(struct cpuidle_driver *drv, int state)
  46 {
  47         return false;
  48 }
  49
  50 static inline int cpuidle_coupled_state_verify(struct cpuidle_driver *drv)
  51 {
  52         return 0;
  53 }
  54
  55 static inline int cpuidle_enter_state_coupled(struct cpuidle_device *dev,
  56                 struct cpuidle_driver *drv, int next_state)
  57 {
  58         return -1;
  59 }
  60
  61 static inline int cpuidle_coupled_register_device(struct cpuidle_device *dev)
  62 {
  63         return 0;
  64 }
  65
  66 static inline void cpuidle_coupled_unregister_device(struct cpuidle_device *dev)
  67 {
  68 }
  69 #endif
  70
  71 #endif /* __DRIVER_CPUIDLE_H */