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1 | /* |
2 | * pm_clock.h - Definitions and headers related to device clocks. |
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_CLOCK_H |
10 | #define _LINUX_PM_CLOCK_H |
11 | |
12 | #include <linux/device.h> |
13 | #include <linux/notifier.h> |
14 | |
15 | struct pm_clk_notifier_block { |
16 | struct notifier_block nb; |
17 | struct dev_pm_domain *pm_domain; |
18 | char *con_ids[]; |
19 | }; |
20 | |
21 | #ifdef CONFIG_PM_CLK |
22 | static inline bool pm_clk_no_clocks(struct device *dev) |
23 | { |
24 | return dev && dev->power.subsys_data |
25 | && list_empty(&dev->power.subsys_data->clock_list); |
26 | } |
27 | |
28 | extern void pm_clk_init(struct device *dev); |
29 | extern int pm_clk_create(struct device *dev); |
30 | extern void pm_clk_destroy(struct device *dev); |
31 | extern int pm_clk_add(struct device *dev, const char *con_id); |
32 | extern void pm_clk_remove(struct device *dev, const char *con_id); |
33 | extern int pm_clk_suspend(struct device *dev); |
34 | extern int pm_clk_resume(struct device *dev); |
35 | #else |
36 | static inline bool pm_clk_no_clocks(struct device *dev) |
37 | { |
38 | return true; |
39 | } |
40 | static inline void pm_clk_init(struct device *dev) |
41 | { |
42 | } |
43 | static inline int pm_clk_create(struct device *dev) |
44 | { |
45 | return -EINVAL; |
46 | } |
47 | static inline void pm_clk_destroy(struct device *dev) |
48 | { |
49 | } |
50 | static inline int pm_clk_add(struct device *dev, const char *con_id) |
51 | { |
52 | return -EINVAL; |
53 | } |
54 | static inline void pm_clk_remove(struct device *dev, const char *con_id) |
55 | { |
56 | } |
57 | #define pm_clk_suspend NULL |
58 | #define pm_clk_resume NULL |
59 | #endif |
60 | |
61 | #ifdef CONFIG_HAVE_CLK |
62 | extern void pm_clk_add_notifier(struct bus_type *bus, |
63 | struct pm_clk_notifier_block *clknb); |
64 | #else |
65 | static inline void pm_clk_add_notifier(struct bus_type *bus, |
66 | struct pm_clk_notifier_block *clknb) |
67 | { |
68 | } |
69 | #endif |
70 | |
71 | #endif |
72 |
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