LXR linux/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 */
  10extern char param_governor[];
  11extern struct cpuidle_governor *cpuidle_curr_governor;
  12extern struct cpuidle_governor *cpuidle_prev_governor;
  13extern struct list_head cpuidle_governors;
  14extern struct list_head cpuidle_detected_devices;
  15extern struct mutex cpuidle_lock;
  16extern spinlock_t cpuidle_driver_lock;
  17extern int cpuidle_disabled(void);
  18extern int cpuidle_enter_state(struct cpuidle_device *dev,
  19                struct cpuidle_driver *drv, int next_state);
  20
  21/* idle loop */
  22extern void cpuidle_install_idle_handler(void);
  23extern void cpuidle_uninstall_idle_handler(void);
  24
  25/* governors */
  26extern struct cpuidle_governor *cpuidle_find_governor(const char *str);
  27extern int cpuidle_switch_governor(struct cpuidle_governor *gov);
  28
  29/* sysfs */
  30
  31struct device;
  32
  33extern int cpuidle_add_interface(struct device *dev);
  34extern void cpuidle_remove_interface(struct device *dev);
  35extern int cpuidle_add_device_sysfs(struct cpuidle_device *device);
  36extern void cpuidle_remove_device_sysfs(struct cpuidle_device *device);
  37extern int cpuidle_add_sysfs(struct cpuidle_device *dev);
  38extern void cpuidle_remove_sysfs(struct cpuidle_device *dev);
  39
  40#ifdef CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED
  41bool cpuidle_state_is_coupled(struct cpuidle_driver *drv, int state);
  42int cpuidle_coupled_state_verify(struct cpuidle_driver *drv);
  43int cpuidle_enter_state_coupled(struct cpuidle_device *dev,
  44                struct cpuidle_driver *drv, int next_state);
  45int cpuidle_coupled_register_device(struct cpuidle_device *dev);
  46void cpuidle_coupled_unregister_device(struct cpuidle_device *dev);
  47#else
  48static inline
  49bool cpuidle_state_is_coupled(struct cpuidle_driver *drv, int state)
  50{
  51        return false;
  52}
  53
  54static inline int cpuidle_coupled_state_verify(struct cpuidle_driver *drv)
  55{
  56        return 0;
  57}
  58
  59static inline int cpuidle_enter_state_coupled(struct cpuidle_device *dev,
  60                struct cpuidle_driver *drv, int next_state)
  61{
  62        return -1;
  63}
  64
  65static inline int cpuidle_coupled_register_device(struct cpuidle_device *dev)
  66{
  67        return 0;
  68}
  69
  70static inline void cpuidle_coupled_unregister_device(struct cpuidle_device *dev)
  71{
  72}
  73#endif
  74
  75#endif /* __DRIVER_CPUIDLE_H */
  76