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 struct clk;
22
23 #ifdef CONFIG_PM_CLK
pm_clk_no_clocks(struct device * dev)24 static inline bool pm_clk_no_clocks(struct device *dev)
25 {
26 return dev && dev->power.subsys_data
27 && list_empty(&dev->power.subsys_data->clock_list);
28 }
29
30 extern void pm_clk_init(struct device *dev);
31 extern int pm_clk_create(struct device *dev);
32 extern void pm_clk_destroy(struct device *dev);
33 extern int pm_clk_add(struct device *dev, const char *con_id);
34 extern int pm_clk_add_clk(struct device *dev, struct clk *clk);
35 extern void pm_clk_remove(struct device *dev, const char *con_id);
36 extern int pm_clk_suspend(struct device *dev);
37 extern int pm_clk_resume(struct device *dev);
38 #else
pm_clk_no_clocks(struct device * dev)39 static inline bool pm_clk_no_clocks(struct device *dev)
40 {
41 return true;
42 }
pm_clk_init(struct device * dev)43 static inline void pm_clk_init(struct device *dev)
44 {
45 }
pm_clk_create(struct device * dev)46 static inline int pm_clk_create(struct device *dev)
47 {
48 return -EINVAL;
49 }
pm_clk_destroy(struct device * dev)50 static inline void pm_clk_destroy(struct device *dev)
51 {
52 }
pm_clk_add(struct device * dev,const char * con_id)53 static inline int pm_clk_add(struct device *dev, const char *con_id)
54 {
55 return -EINVAL;
56 }
57
pm_clk_add_clk(struct device * dev,struct clk * clk)58 static inline int pm_clk_add_clk(struct device *dev, struct clk *clk)
59 {
60 return -EINVAL;
61 }
pm_clk_remove(struct device * dev,const char * con_id)62 static inline void pm_clk_remove(struct device *dev, const char *con_id)
63 {
64 }
65 #define pm_clk_suspend NULL
66 #define pm_clk_resume NULL
67 #endif
68
69 #ifdef CONFIG_HAVE_CLK
70 extern void pm_clk_add_notifier(struct bus_type *bus,
71 struct pm_clk_notifier_block *clknb);
72 #else
pm_clk_add_notifier(struct bus_type * bus,struct pm_clk_notifier_block * clknb)73 static inline void pm_clk_add_notifier(struct bus_type *bus,
74 struct pm_clk_notifier_block *clknb)
75 {
76 }
77 #endif
78
79 #endif
80