diff options
Diffstat (limited to 'include/linux/pm_domain.h')
| -rw-r--r-- | include/linux/pm_domain.h | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h new file mode 100644 index 000000000000..21097cb086fe --- /dev/null +++ b/include/linux/pm_domain.h | |||
| @@ -0,0 +1,108 @@ | |||
| 1 | /* | ||
| 2 | * pm_domain.h - Definitions and headers related to device power domains. | ||
| 3 | * | ||
| 4 | * Copyright (C) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Renesas Electronics Corp. | ||
| 5 | * | ||
| 6 | * This file is released under the GPLv2. | ||
| 7 | */ | ||
| 8 | |||
| 9 | #ifndef _LINUX_PM_DOMAIN_H | ||
| 10 | #define _LINUX_PM_DOMAIN_H | ||
| 11 | |||
| 12 | #include <linux/device.h> | ||
| 13 | |||
| 14 | enum gpd_status { | ||
| 15 | GPD_STATE_ACTIVE = 0, /* PM domain is active */ | ||
| 16 | GPD_STATE_BUSY, /* Something is happening to the PM domain */ | ||
| 17 | GPD_STATE_REPEAT, /* Power off in progress, to be repeated */ | ||
| 18 | GPD_STATE_POWER_OFF, /* PM domain is off */ | ||
| 19 | }; | ||
| 20 | |||
| 21 | struct dev_power_governor { | ||
| 22 | bool (*power_down_ok)(struct dev_pm_domain *domain); | ||
| 23 | }; | ||
| 24 | |||
| 25 | struct generic_pm_domain { | ||
| 26 | struct dev_pm_domain domain; /* PM domain operations */ | ||
| 27 | struct list_head gpd_list_node; /* Node in the global PM domains list */ | ||
| 28 | struct list_head sd_node; /* Node in the parent's subdomain list */ | ||
| 29 | struct generic_pm_domain *parent; /* Parent PM domain */ | ||
| 30 | struct list_head sd_list; /* List of dubdomains */ | ||
| 31 | struct list_head dev_list; /* List of devices */ | ||
| 32 | struct mutex lock; | ||
| 33 | struct dev_power_governor *gov; | ||
| 34 | struct work_struct power_off_work; | ||
| 35 | unsigned int in_progress; /* Number of devices being suspended now */ | ||
| 36 | unsigned int sd_count; /* Number of subdomains with power "on" */ | ||
| 37 | enum gpd_status status; /* Current state of the domain */ | ||
| 38 | wait_queue_head_t status_wait_queue; | ||
| 39 | struct task_struct *poweroff_task; /* Powering off task */ | ||
| 40 | unsigned int resume_count; /* Number of devices being resumed */ | ||
| 41 | unsigned int device_count; /* Number of devices */ | ||
| 42 | unsigned int suspended_count; /* System suspend device counter */ | ||
| 43 | unsigned int prepared_count; /* Suspend counter of prepared devices */ | ||
| 44 | bool suspend_power_off; /* Power status before system suspend */ | ||
| 45 | int (*power_off)(struct generic_pm_domain *domain); | ||
| 46 | int (*power_on)(struct generic_pm_domain *domain); | ||
| 47 | int (*start_device)(struct device *dev); | ||
| 48 | int (*stop_device)(struct device *dev); | ||
| 49 | bool (*active_wakeup)(struct device *dev); | ||
| 50 | }; | ||
| 51 | |||
| 52 | static inline struct generic_pm_domain *pd_to_genpd(struct dev_pm_domain *pd) | ||
| 53 | { | ||
| 54 | return container_of(pd, struct generic_pm_domain, domain); | ||
| 55 | } | ||
| 56 | |||
| 57 | struct dev_list_entry { | ||
| 58 | struct list_head node; | ||
| 59 | struct device *dev; | ||
| 60 | bool need_restore; | ||
| 61 | }; | ||
| 62 | |||
| 63 | #ifdef CONFIG_PM_GENERIC_DOMAINS | ||
| 64 | extern int pm_genpd_add_device(struct generic_pm_domain *genpd, | ||
| 65 | struct device *dev); | ||
| 66 | extern int pm_genpd_remove_device(struct generic_pm_domain *genpd, | ||
| 67 | struct device *dev); | ||
| 68 | extern int pm_genpd_add_subdomain(struct generic_pm_domain *genpd, | ||
| 69 | struct generic_pm_domain *new_subdomain); | ||
| 70 | extern int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd, | ||
| 71 | struct generic_pm_domain *target); | ||
| 72 | extern void pm_genpd_init(struct generic_pm_domain *genpd, | ||
| 73 | struct dev_power_governor *gov, bool is_off); | ||
| 74 | extern int pm_genpd_poweron(struct generic_pm_domain *genpd); | ||
| 75 | extern void pm_genpd_poweroff_unused(void); | ||
| 76 | extern void genpd_queue_power_off_work(struct generic_pm_domain *genpd); | ||
| 77 | #else | ||
| 78 | static inline int pm_genpd_add_device(struct generic_pm_domain *genpd, | ||
| 79 | struct device *dev) | ||
| 80 | { | ||
| 81 | return -ENOSYS; | ||
| 82 | } | ||
| 83 | static inline int pm_genpd_remove_device(struct generic_pm_domain *genpd, | ||
| 84 | struct device *dev) | ||
| 85 | { | ||
| 86 | return -ENOSYS; | ||
| 87 | } | ||
| 88 | static inline int pm_genpd_add_subdomain(struct generic_pm_domain *genpd, | ||
| 89 | struct generic_pm_domain *new_sd) | ||
| 90 | { | ||
| 91 | return -ENOSYS; | ||
| 92 | } | ||
| 93 | static inline int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd, | ||
| 94 | struct generic_pm_domain *target) | ||
| 95 | { | ||
| 96 | return -ENOSYS; | ||
| 97 | } | ||
| 98 | static inline void pm_genpd_init(struct generic_pm_domain *genpd, | ||
| 99 | struct dev_power_governor *gov, bool is_off) {} | ||
| 100 | static inline int pm_genpd_poweron(struct generic_pm_domain *genpd) | ||
| 101 | { | ||
| 102 | return -ENOSYS; | ||
| 103 | } | ||
| 104 | static inline void pm_genpd_poweroff_unused(void) {} | ||
| 105 | static inline void genpd_queue_power_off_work(struct generic_pm_domain *gpd) {} | ||
| 106 | #endif | ||
| 107 | |||
| 108 | #endif /* _LINUX_PM_DOMAIN_H */ | ||