drivers/cpuidle/cpuidle.h

   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 */