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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 | ||
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14 | #define GPD_IN_SUSPEND 1 |
15 | #define GPD_POWER_OFF 2 | |
16 | ||
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17 | struct dev_power_governor { |
18 | bool (*power_down_ok)(struct dev_pm_domain *domain); | |
19 | }; | |
20 | ||
21 | struct generic_pm_domain { | |
22 | struct dev_pm_domain domain; /* PM domain operations */ | |
23 | struct list_head sd_node; /* Node in the parent's subdomain list */ | |
24 | struct generic_pm_domain *parent; /* Parent PM domain */ | |
25 | struct list_head sd_list; /* List of dubdomains */ | |
26 | struct list_head dev_list; /* List of devices */ | |
27 | struct mutex lock; | |
28 | struct dev_power_governor *gov; | |
29 | struct work_struct power_off_work; | |
30 | unsigned int in_progress; /* Number of devices being suspended now */ | |
31 | unsigned int sd_count; /* Number of subdomains with power "on" */ | |
32 | bool power_is_off; /* Whether or not power has been removed */ | |
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33 | unsigned int device_count; /* Number of devices */ |
34 | unsigned int suspended_count; /* System suspend device counter */ | |
35 | unsigned int prepared_count; /* Suspend counter of prepared devices */ | |
36 | bool suspend_power_off; /* Power status before system suspend */ | |
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37 | int (*power_off)(struct generic_pm_domain *domain); |
38 | int (*power_on)(struct generic_pm_domain *domain); | |
39 | int (*start_device)(struct device *dev); | |
40 | int (*stop_device)(struct device *dev); | |
d4f2d87a | 41 | bool (*active_wakeup)(struct device *dev); |
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42 | }; |
43 | ||
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44 | static inline struct generic_pm_domain *pd_to_genpd(struct dev_pm_domain *pd) |
45 | { | |
46 | return container_of(pd, struct generic_pm_domain, domain); | |
47 | } | |
48 | ||
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49 | struct dev_list_entry { |
50 | struct list_head node; | |
51 | struct device *dev; | |
52 | bool need_restore; | |
53 | }; | |
54 | ||
55 | #ifdef CONFIG_PM_GENERIC_DOMAINS | |
56 | extern int pm_genpd_add_device(struct generic_pm_domain *genpd, | |
57 | struct device *dev); | |
58 | extern int pm_genpd_remove_device(struct generic_pm_domain *genpd, | |
59 | struct device *dev); | |
60 | extern int pm_genpd_add_subdomain(struct generic_pm_domain *genpd, | |
61 | struct generic_pm_domain *new_subdomain); | |
62 | extern int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd, | |
63 | struct generic_pm_domain *target); | |
64 | extern void pm_genpd_init(struct generic_pm_domain *genpd, | |
65 | struct dev_power_governor *gov, bool is_off); | |
18b4f3f5 | 66 | extern int pm_genpd_poweron(struct generic_pm_domain *genpd); |
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67 | #else |
68 | static inline int pm_genpd_add_device(struct generic_pm_domain *genpd, | |
69 | struct device *dev) | |
70 | { | |
71 | return -ENOSYS; | |
72 | } | |
73 | static inline int pm_genpd_remove_device(struct generic_pm_domain *genpd, | |
74 | struct device *dev) | |
75 | { | |
76 | return -ENOSYS; | |
77 | } | |
78 | static inline int pm_genpd_add_subdomain(struct generic_pm_domain *genpd, | |
79 | struct generic_pm_domain *new_sd) | |
80 | { | |
81 | return -ENOSYS; | |
82 | } | |
83 | static inline int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd, | |
84 | struct generic_pm_domain *target) | |
85 | { | |
86 | return -ENOSYS; | |
87 | } | |
88 | static inline void pm_genpd_init(struct generic_pm_domain *genpd, | |
89 | struct dev_power_governor *gov, bool is_off) {} | |
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90 | static inline int pm_genpd_poweron(struct generic_pm_domain *genpd) |
91 | { | |
92 | return -ENOSYS; | |
93 | } | |
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94 | #endif |
95 | ||
96 | #endif /* _LINUX_PM_DOMAIN_H */ |