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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 | ||
17b75eca RW |
14 | enum gpd_status { |
15 | GPD_STATE_ACTIVE = 0, /* PM domain is active */ | |
17877eb5 | 16 | GPD_STATE_WAIT_MASTER, /* PM domain's master is being waited for */ |
17b75eca | 17 | GPD_STATE_BUSY, /* Something is happening to the PM domain */ |
c6d22b37 | 18 | GPD_STATE_REPEAT, /* Power off in progress, to be repeated */ |
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19 | GPD_STATE_POWER_OFF, /* PM domain is off */ |
20 | }; | |
596ba34b | 21 | |
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22 | struct dev_power_governor { |
23 | bool (*power_down_ok)(struct dev_pm_domain *domain); | |
24 | }; | |
25 | ||
26 | struct generic_pm_domain { | |
27 | struct dev_pm_domain domain; /* PM domain operations */ | |
5125bbf3 | 28 | struct list_head gpd_list_node; /* Node in the global PM domains list */ |
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29 | struct list_head master_links; /* Links with PM domain as a master */ |
30 | struct list_head slave_links; /* Links with PM domain as a slave */ | |
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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 */ | |
c4bb3160 | 36 | atomic_t sd_count; /* Number of subdomains with power "on" */ |
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37 | enum gpd_status status; /* Current state of the domain */ |
38 | wait_queue_head_t status_wait_queue; | |
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39 | struct task_struct *poweroff_task; /* Powering off task */ |
40 | unsigned int resume_count; /* Number of devices being resumed */ | |
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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 */ | |
0aa2a221 | 45 | bool dev_irq_safe; /* Device callbacks are IRQ-safe */ |
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46 | int (*power_off)(struct generic_pm_domain *domain); |
47 | int (*power_on)(struct generic_pm_domain *domain); | |
48 | int (*start_device)(struct device *dev); | |
49 | int (*stop_device)(struct device *dev); | |
d4f2d87a | 50 | bool (*active_wakeup)(struct device *dev); |
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51 | }; |
52 | ||
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53 | static inline struct generic_pm_domain *pd_to_genpd(struct dev_pm_domain *pd) |
54 | { | |
55 | return container_of(pd, struct generic_pm_domain, domain); | |
56 | } | |
57 | ||
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58 | struct gpd_link { |
59 | struct generic_pm_domain *master; | |
60 | struct list_head master_node; | |
61 | struct generic_pm_domain *slave; | |
62 | struct list_head slave_node; | |
63 | }; | |
64 | ||
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65 | #ifdef CONFIG_PM_GENERIC_DOMAINS |
66 | extern int pm_genpd_add_device(struct generic_pm_domain *genpd, | |
67 | struct device *dev); | |
68 | extern int pm_genpd_remove_device(struct generic_pm_domain *genpd, | |
69 | struct device *dev); | |
70 | extern int pm_genpd_add_subdomain(struct generic_pm_domain *genpd, | |
71 | struct generic_pm_domain *new_subdomain); | |
72 | extern int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd, | |
73 | struct generic_pm_domain *target); | |
74 | extern void pm_genpd_init(struct generic_pm_domain *genpd, | |
75 | struct dev_power_governor *gov, bool is_off); | |
18b4f3f5 | 76 | extern int pm_genpd_poweron(struct generic_pm_domain *genpd); |
f721889f RW |
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) {} | |
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100 | static inline int pm_genpd_poweron(struct generic_pm_domain *genpd) |
101 | { | |
102 | return -ENOSYS; | |
103 | } | |
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104 | #endif |
105 | ||
106 | #ifdef CONFIG_PM_GENERIC_DOMAINS_RUNTIME | |
107 | extern void genpd_queue_power_off_work(struct generic_pm_domain *genpd); | |
108 | extern void pm_genpd_poweroff_unused(void); | |
109 | #else | |
0bc5b2de | 110 | static inline void genpd_queue_power_off_work(struct generic_pm_domain *gpd) {} |
17f2ae7f | 111 | static inline void pm_genpd_poweroff_unused(void) {} |
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112 | #endif |
113 | ||
114 | #endif /* _LINUX_PM_DOMAIN_H */ |