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 #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 */