linux/drivers/cpuidle/cpuidle.h
Greg Kroah-Hartman bf6479dbe7 cpuidle: move to use bus_get_dev_root()
Direct access to the struct bus_type dev_root pointer is going away soon
so replace that with a call to bus_get_dev_root() instead, which is what
it is there for.

This allows us to clean up the cpuidle_add_interface() call a bit as it
was only called in one place, with the same argument so just put that
into the function itself.  Note that cpuidle_remove_interface() should
also probably be removed in the future as there are no callers of it for
some reason.

Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: linux-pm@vger.kernel.org
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
Link: https://lore.kernel.org/r/20230322090557.2943479-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-03-22 20:25:23 +01:00

76 lines
2.2 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
/*
* cpuidle.h - The internal header file
*/
#ifndef __DRIVER_CPUIDLE_H
#define __DRIVER_CPUIDLE_H
/* For internal use only */
extern char param_governor[];
extern struct cpuidle_governor *cpuidle_curr_governor;
extern struct cpuidle_governor *cpuidle_prev_governor;
extern struct list_head cpuidle_governors;
extern struct list_head cpuidle_detected_devices;
extern struct mutex cpuidle_lock;
extern spinlock_t cpuidle_driver_lock;
extern int cpuidle_disabled(void);
extern int cpuidle_enter_state(struct cpuidle_device *dev,
struct cpuidle_driver *drv, int next_state);
/* idle loop */
extern void cpuidle_install_idle_handler(void);
extern void cpuidle_uninstall_idle_handler(void);
/* governors */
extern struct cpuidle_governor *cpuidle_find_governor(const char *str);
extern int cpuidle_switch_governor(struct cpuidle_governor *gov);
/* sysfs */
struct device;
extern int cpuidle_add_interface(void);
extern void cpuidle_remove_interface(struct device *dev);
extern int cpuidle_add_device_sysfs(struct cpuidle_device *device);
extern void cpuidle_remove_device_sysfs(struct cpuidle_device *device);
extern int cpuidle_add_sysfs(struct cpuidle_device *dev);
extern void cpuidle_remove_sysfs(struct cpuidle_device *dev);
#ifdef CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED
bool cpuidle_state_is_coupled(struct cpuidle_driver *drv, int state);
int cpuidle_coupled_state_verify(struct cpuidle_driver *drv);
int cpuidle_enter_state_coupled(struct cpuidle_device *dev,
struct cpuidle_driver *drv, int next_state);
int cpuidle_coupled_register_device(struct cpuidle_device *dev);
void cpuidle_coupled_unregister_device(struct cpuidle_device *dev);
#else
static inline
bool cpuidle_state_is_coupled(struct cpuidle_driver *drv, int state)
{
return false;
}
static inline int cpuidle_coupled_state_verify(struct cpuidle_driver *drv)
{
return 0;
}
static inline int cpuidle_enter_state_coupled(struct cpuidle_device *dev,
struct cpuidle_driver *drv, int next_state)
{
return -1;
}
static inline int cpuidle_coupled_register_device(struct cpuidle_device *dev)
{
return 0;
}
static inline void cpuidle_coupled_unregister_device(struct cpuidle_device *dev)
{
}
#endif
#endif /* __DRIVER_CPUIDLE_H */