cd0ea672f5
The struct pm_domain_data data type is defined in such a way that adding new fields specific to the generic PM domains code will require include/linux/pm.h to be modified. As a result, data types used only by the generic PM domains code will be defined in two headers, although they all should be defined in pm_domain.h and pm.h will need to include more headers, which won't be very nice. For this reason change the definition of struct pm_subsys_data so that its domain_data member is a pointer, which will allow struct pm_domain_data to be subclassed by various PM domains implementations. Remove the need_restore member from struct pm_domain_data and make the generic PM domains code subclass it by adding the need_restore member to the new data type. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
125 lines
4.2 KiB
C
125 lines
4.2 KiB
C
/*
|
|
* pm_domain.h - Definitions and headers related to device power domains.
|
|
*
|
|
* Copyright (C) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Renesas Electronics Corp.
|
|
*
|
|
* This file is released under the GPLv2.
|
|
*/
|
|
|
|
#ifndef _LINUX_PM_DOMAIN_H
|
|
#define _LINUX_PM_DOMAIN_H
|
|
|
|
#include <linux/device.h>
|
|
|
|
enum gpd_status {
|
|
GPD_STATE_ACTIVE = 0, /* PM domain is active */
|
|
GPD_STATE_WAIT_MASTER, /* PM domain's master is being waited for */
|
|
GPD_STATE_BUSY, /* Something is happening to the PM domain */
|
|
GPD_STATE_REPEAT, /* Power off in progress, to be repeated */
|
|
GPD_STATE_POWER_OFF, /* PM domain is off */
|
|
};
|
|
|
|
struct dev_power_governor {
|
|
bool (*power_down_ok)(struct dev_pm_domain *domain);
|
|
};
|
|
|
|
struct generic_pm_domain {
|
|
struct dev_pm_domain domain; /* PM domain operations */
|
|
struct list_head gpd_list_node; /* Node in the global PM domains list */
|
|
struct list_head master_links; /* Links with PM domain as a master */
|
|
struct list_head slave_links; /* Links with PM domain as a slave */
|
|
struct list_head dev_list; /* List of devices */
|
|
struct mutex lock;
|
|
struct dev_power_governor *gov;
|
|
struct work_struct power_off_work;
|
|
unsigned int in_progress; /* Number of devices being suspended now */
|
|
atomic_t sd_count; /* Number of subdomains with power "on" */
|
|
enum gpd_status status; /* Current state of the domain */
|
|
wait_queue_head_t status_wait_queue;
|
|
struct task_struct *poweroff_task; /* Powering off task */
|
|
unsigned int resume_count; /* Number of devices being resumed */
|
|
unsigned int device_count; /* Number of devices */
|
|
unsigned int suspended_count; /* System suspend device counter */
|
|
unsigned int prepared_count; /* Suspend counter of prepared devices */
|
|
bool suspend_power_off; /* Power status before system suspend */
|
|
bool dev_irq_safe; /* Device callbacks are IRQ-safe */
|
|
int (*power_off)(struct generic_pm_domain *domain);
|
|
int (*power_on)(struct generic_pm_domain *domain);
|
|
int (*start_device)(struct device *dev);
|
|
int (*stop_device)(struct device *dev);
|
|
bool (*active_wakeup)(struct device *dev);
|
|
};
|
|
|
|
static inline struct generic_pm_domain *pd_to_genpd(struct dev_pm_domain *pd)
|
|
{
|
|
return container_of(pd, struct generic_pm_domain, domain);
|
|
}
|
|
|
|
struct gpd_link {
|
|
struct generic_pm_domain *master;
|
|
struct list_head master_node;
|
|
struct generic_pm_domain *slave;
|
|
struct list_head slave_node;
|
|
};
|
|
|
|
struct generic_pm_domain_data {
|
|
struct pm_domain_data base;
|
|
bool need_restore;
|
|
};
|
|
|
|
static inline struct generic_pm_domain_data *to_gpd_data(struct pm_domain_data *pdd)
|
|
{
|
|
return container_of(pdd, struct generic_pm_domain_data, base);
|
|
}
|
|
|
|
#ifdef CONFIG_PM_GENERIC_DOMAINS
|
|
extern int pm_genpd_add_device(struct generic_pm_domain *genpd,
|
|
struct device *dev);
|
|
extern int pm_genpd_remove_device(struct generic_pm_domain *genpd,
|
|
struct device *dev);
|
|
extern int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
|
|
struct generic_pm_domain *new_subdomain);
|
|
extern int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
|
|
struct generic_pm_domain *target);
|
|
extern void pm_genpd_init(struct generic_pm_domain *genpd,
|
|
struct dev_power_governor *gov, bool is_off);
|
|
extern int pm_genpd_poweron(struct generic_pm_domain *genpd);
|
|
#else
|
|
static inline int pm_genpd_add_device(struct generic_pm_domain *genpd,
|
|
struct device *dev)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
static inline int pm_genpd_remove_device(struct generic_pm_domain *genpd,
|
|
struct device *dev)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
static inline int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
|
|
struct generic_pm_domain *new_sd)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
static inline int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
|
|
struct generic_pm_domain *target)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
static inline void pm_genpd_init(struct generic_pm_domain *genpd,
|
|
struct dev_power_governor *gov, bool is_off) {}
|
|
static inline int pm_genpd_poweron(struct generic_pm_domain *genpd)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_PM_GENERIC_DOMAINS_RUNTIME
|
|
extern void genpd_queue_power_off_work(struct generic_pm_domain *genpd);
|
|
extern void pm_genpd_poweroff_unused(void);
|
|
#else
|
|
static inline void genpd_queue_power_off_work(struct generic_pm_domain *gpd) {}
|
|
static inline void pm_genpd_poweroff_unused(void) {}
|
|
#endif
|
|
|
|
#endif /* _LINUX_PM_DOMAIN_H */
|