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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 | ||
14 | struct dev_power_governor { | |
15 | bool (*power_down_ok)(struct dev_pm_domain *domain); | |
16 | }; | |
17 | ||
18 | struct generic_pm_domain { | |
19 | struct dev_pm_domain domain; /* PM domain operations */ | |
20 | struct list_head sd_node; /* Node in the parent's subdomain list */ | |
21 | struct generic_pm_domain *parent; /* Parent PM domain */ | |
22 | struct list_head sd_list; /* List of dubdomains */ | |
23 | struct list_head dev_list; /* List of devices */ | |
24 | struct mutex lock; | |
25 | struct dev_power_governor *gov; | |
26 | struct work_struct power_off_work; | |
27 | unsigned int in_progress; /* Number of devices being suspended now */ | |
28 | unsigned int sd_count; /* Number of subdomains with power "on" */ | |
29 | bool power_is_off; /* Whether or not power has been removed */ | |
30 | int (*power_off)(struct generic_pm_domain *domain); | |
31 | int (*power_on)(struct generic_pm_domain *domain); | |
32 | int (*start_device)(struct device *dev); | |
33 | int (*stop_device)(struct device *dev); | |
34 | }; | |
35 | ||
36 | struct dev_list_entry { | |
37 | struct list_head node; | |
38 | struct device *dev; | |
39 | bool need_restore; | |
40 | }; | |
41 | ||
42 | #ifdef CONFIG_PM_GENERIC_DOMAINS | |
43 | extern int pm_genpd_add_device(struct generic_pm_domain *genpd, | |
44 | struct device *dev); | |
45 | extern int pm_genpd_remove_device(struct generic_pm_domain *genpd, | |
46 | struct device *dev); | |
47 | extern int pm_genpd_add_subdomain(struct generic_pm_domain *genpd, | |
48 | struct generic_pm_domain *new_subdomain); | |
49 | extern int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd, | |
50 | struct generic_pm_domain *target); | |
51 | extern void pm_genpd_init(struct generic_pm_domain *genpd, | |
52 | struct dev_power_governor *gov, bool is_off); | |
53 | #else | |
54 | static inline int pm_genpd_add_device(struct generic_pm_domain *genpd, | |
55 | struct device *dev) | |
56 | { | |
57 | return -ENOSYS; | |
58 | } | |
59 | static inline int pm_genpd_remove_device(struct generic_pm_domain *genpd, | |
60 | struct device *dev) | |
61 | { | |
62 | return -ENOSYS; | |
63 | } | |
64 | static inline int pm_genpd_add_subdomain(struct generic_pm_domain *genpd, | |
65 | struct generic_pm_domain *new_sd) | |
66 | { | |
67 | return -ENOSYS; | |
68 | } | |
69 | static inline int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd, | |
70 | struct generic_pm_domain *target) | |
71 | { | |
72 | return -ENOSYS; | |
73 | } | |
74 | static inline void pm_genpd_init(struct generic_pm_domain *genpd, | |
75 | struct dev_power_governor *gov, bool is_off) {} | |
76 | #endif | |
77 | ||
78 | #endif /* _LINUX_PM_DOMAIN_H */ |