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 |
33 | static inline bool pm_clk_no_clocks(struct device *dev) |
34 | { |
35 | return dev && dev->power.subsys_data |
36 | && list_empty(head: &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 |
52 | static inline bool pm_clk_no_clocks(struct device *dev) |
53 | { |
54 | return true; |
55 | } |
56 | static inline void pm_clk_init(struct device *dev) |
57 | { |
58 | } |
59 | static inline int pm_clk_create(struct device *dev) |
60 | { |
61 | return -EINVAL; |
62 | } |
63 | static inline void pm_clk_destroy(struct device *dev) |
64 | { |
65 | } |
66 | static inline int pm_clk_add(struct device *dev, const char *con_id) |
67 | { |
68 | return -EINVAL; |
69 | } |
70 | |
71 | static inline int pm_clk_add_clk(struct device *dev, struct clk *clk) |
72 | { |
73 | return -EINVAL; |
74 | } |
75 | static inline int of_pm_clk_add_clks(struct device *dev) |
76 | { |
77 | return -EINVAL; |
78 | } |
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 |
84 | static inline void pm_clk_remove_clk(struct device *dev, struct clk *clk) |
85 | { |
86 | } |
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(struct bus_type *bus, |
95 | struct pm_clk_notifier_block *clknb); |
96 | #else |
97 | static inline void pm_clk_add_notifier(struct bus_type *bus, |
98 | struct pm_clk_notifier_block *clknb) |
99 | { |
100 | } |
101 | #endif |
102 | |
103 | #endif |
104 | |