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
24 extern int pm_clk_runtime_suspend(struct device *dev);
25 extern int pm_clk_runtime_resume(struct device *dev);
26 #define USE_PM_CLK_RUNTIME_OPS \
27 .runtime_suspend = pm_clk_runtime_suspend, \
28 .runtime_resume = pm_clk_runtime_resume,
29 #else
30 #define USE_PM_CLK_RUNTIME_OPS
31 #endif
32
33 #ifdef CONFIG_PM_CLK
pm_clk_no_clocks(struct device * dev)34 static inline bool pm_clk_no_clocks(struct device *dev)
35 {
36 return dev && dev->power.subsys_data
37 && list_empty(&dev->power.subsys_data->clock_list);
38 }
39
40 extern void pm_clk_init(struct device *dev);
41 extern int pm_clk_create(struct device *dev);
42 extern void pm_clk_destroy(struct device *dev);
43 extern int pm_clk_add(struct device *dev, const char *con_id);
44 extern int pm_clk_add_clk(struct device *dev, struct clk *clk);
45 extern void pm_clk_remove(struct device *dev, const char *con_id);
46 extern int pm_clk_suspend(struct device *dev);
47 extern int pm_clk_resume(struct device *dev);
48 #else
pm_clk_no_clocks(struct device * dev)49 static inline bool pm_clk_no_clocks(struct device *dev)
50 {
51 return true;
52 }
pm_clk_init(struct device * dev)53 static inline void pm_clk_init(struct device *dev)
54 {
55 }
pm_clk_create(struct device * dev)56 static inline int pm_clk_create(struct device *dev)
57 {
58 return -EINVAL;
59 }
pm_clk_destroy(struct device * dev)60 static inline void pm_clk_destroy(struct device *dev)
61 {
62 }
pm_clk_add(struct device * dev,const char * con_id)63 static inline int pm_clk_add(struct device *dev, const char *con_id)
64 {
65 return -EINVAL;
66 }
67
pm_clk_add_clk(struct device * dev,struct clk * clk)68 static inline int pm_clk_add_clk(struct device *dev, struct clk *clk)
69 {
70 return -EINVAL;
71 }
pm_clk_remove(struct device * dev,const char * con_id)72 static inline void pm_clk_remove(struct device *dev, const char *con_id)
73 {
74 }
75 #define pm_clk_suspend NULL
76 #define pm_clk_resume NULL
77 #endif
78
79 #ifdef CONFIG_HAVE_CLK
80 extern void pm_clk_add_notifier(struct bus_type *bus,
81 struct pm_clk_notifier_block *clknb);
82 #else
pm_clk_add_notifier(struct bus_type * bus,struct pm_clk_notifier_block * clknb)83 static inline void pm_clk_add_notifier(struct bus_type *bus,
84 struct pm_clk_notifier_block *clknb)
85 {
86 }
87 #endif
88
89 #endif
90