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b5e8d269 RW |
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 |