1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * pm_clock.h - Definitions and headers related to device clocks.
4 *
5 * Copyright (C) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Renesas Electronics Corp.
6 */
7
8 #ifndef _LINUX_PM_CLOCK_H
9 #define _LINUX_PM_CLOCK_H
10
11 #include <linux/device.h>
12 #include <linux/notifier.h>
13
14 struct pm_clk_notifier_block {
15 struct notifier_block nb;
16 struct dev_pm_domain *pm_domain;
17 char *con_ids[];
18 };
19
20 struct clk;
21
22 #ifdef CONFIG_PM
23 extern int pm_clk_runtime_suspend(struct device *dev);
24 extern int pm_clk_runtime_resume(struct device *dev);
25 #define USE_PM_CLK_RUNTIME_OPS \
26 .runtime_suspend = pm_clk_runtime_suspend, \
27 .runtime_resume = pm_clk_runtime_resume,
28 #else
29 #define USE_PM_CLK_RUNTIME_OPS
30 #endif
31
32 #ifdef CONFIG_PM_CLK
pm_clk_no_clocks(struct device * dev)33 static inline bool pm_clk_no_clocks(struct device *dev)
34 {
35 return dev && dev->power.subsys_data
36 && list_empty(&dev->power.subsys_data->clock_list);
37 }
38
39 extern void pm_clk_init(struct device *dev);
40 extern int pm_clk_create(struct device *dev);
41 extern void pm_clk_destroy(struct device *dev);
42 extern int pm_clk_add(struct device *dev, const char *con_id);
43 extern int pm_clk_add_clk(struct device *dev, struct clk *clk);
44 extern int of_pm_clk_add_clk(struct device *dev, const char *name);
45 extern int of_pm_clk_add_clks(struct device *dev);
46 extern void pm_clk_remove(struct device *dev, const char *con_id);
47 extern void pm_clk_remove_clk(struct device *dev, struct clk *clk);
48 extern int pm_clk_suspend(struct device *dev);
49 extern int pm_clk_resume(struct device *dev);
50 extern int devm_pm_clk_create(struct device *dev);
51 #else
pm_clk_no_clocks(struct device * dev)52 static inline bool pm_clk_no_clocks(struct device *dev)
53 {
54 return true;
55 }
pm_clk_init(struct device * dev)56 static inline void pm_clk_init(struct device *dev)
57 {
58 }
pm_clk_create(struct device * dev)59 static inline int pm_clk_create(struct device *dev)
60 {
61 return -EINVAL;
62 }
pm_clk_destroy(struct device * dev)63 static inline void pm_clk_destroy(struct device *dev)
64 {
65 }
pm_clk_add(struct device * dev,const char * con_id)66 static inline int pm_clk_add(struct device *dev, const char *con_id)
67 {
68 return -EINVAL;
69 }
70
pm_clk_add_clk(struct device * dev,struct clk * clk)71 static inline int pm_clk_add_clk(struct device *dev, struct clk *clk)
72 {
73 return -EINVAL;
74 }
of_pm_clk_add_clks(struct device * dev)75 static inline int of_pm_clk_add_clks(struct device *dev)
76 {
77 return -EINVAL;
78 }
pm_clk_remove(struct device * dev,const char * con_id)79 static inline void pm_clk_remove(struct device *dev, const char *con_id)
80 {
81 }
82 #define pm_clk_suspend NULL
83 #define pm_clk_resume NULL
pm_clk_remove_clk(struct device * dev,struct clk * clk)84 static inline void pm_clk_remove_clk(struct device *dev, struct clk *clk)
85 {
86 }
devm_pm_clk_create(struct device * dev)87 static inline int devm_pm_clk_create(struct device *dev)
88 {
89 return -EINVAL;
90 }
91 #endif
92
93 #ifdef CONFIG_HAVE_CLK
94 extern void pm_clk_add_notifier(const struct bus_type *bus,
95 struct pm_clk_notifier_block *clknb);
96 #else
pm_clk_add_notifier(const struct bus_type * bus,struct pm_clk_notifier_block * clknb)97 static inline void pm_clk_add_notifier(const struct bus_type *bus,
98 struct pm_clk_notifier_block *clknb)
99 {
100 }
101 #endif
102
103 #endif
104