| /* |
| * 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> |
| |
| #define GPD_IN_SUSPEND 1 |
| #define GPD_POWER_OFF 2 |
| |
| 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 sd_node; /* Node in the parent's subdomain list */ |
| struct generic_pm_domain *parent; /* Parent PM domain */ |
| struct list_head sd_list; /* List of dubdomains */ |
| 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 */ |
| unsigned int sd_count; /* Number of subdomains with power "on" */ |
| bool power_is_off; /* Whether or not power has been removed */ |
| 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 */ |
| 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); |
| }; |
| |
| static inline struct generic_pm_domain *pd_to_genpd(struct dev_pm_domain *pd) |
| { |
| return container_of(pd, struct generic_pm_domain, domain); |
| } |
| |
| struct dev_list_entry { |
| struct list_head node; |
| struct device *dev; |
| bool need_restore; |
| }; |
| |
| #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); |
| #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) {} |
| #endif |
| |
| #endif /* _LINUX_PM_DOMAIN_H */ |