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
14struct pm_clk_notifier_block {
15 struct notifier_block nb;
16 struct dev_pm_domain *pm_domain;
17 char *con_ids[];
18};
19
20struct clk;
21
22#ifdef CONFIG_PM
23extern int pm_clk_runtime_suspend(struct device *dev);
24extern 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
33static 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
39extern void pm_clk_init(struct device *dev);
40extern int pm_clk_create(struct device *dev);
41extern void pm_clk_destroy(struct device *dev);
42extern int pm_clk_add(struct device *dev, const char *con_id);
43extern int pm_clk_add_clk(struct device *dev, struct clk *clk);
44extern int of_pm_clk_add_clk(struct device *dev, const char *name);
45extern int of_pm_clk_add_clks(struct device *dev);
46extern void pm_clk_remove(struct device *dev, const char *con_id);
47extern void pm_clk_remove_clk(struct device *dev, struct clk *clk);
48extern int pm_clk_suspend(struct device *dev);
49extern int pm_clk_resume(struct device *dev);
50extern int devm_pm_clk_create(struct device *dev);
51#else
52static inline bool pm_clk_no_clocks(struct device *dev)
53{
54 return true;
55}
56static inline void pm_clk_init(struct device *dev)
57{
58}
59static inline int pm_clk_create(struct device *dev)
60{
61 return -EINVAL;
62}
63static inline void pm_clk_destroy(struct device *dev)
64{
65}
66static inline int pm_clk_add(struct device *dev, const char *con_id)
67{
68 return -EINVAL;
69}
70
71static inline int pm_clk_add_clk(struct device *dev, struct clk *clk)
72{
73 return -EINVAL;
74}
75static inline int of_pm_clk_add_clks(struct device *dev)
76{
77 return -EINVAL;
78}
79static 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
84static inline void pm_clk_remove_clk(struct device *dev, struct clk *clk)
85{
86}
87static inline int devm_pm_clk_create(struct device *dev)
88{
89 return -EINVAL;
90}
91#endif
92
93#ifdef CONFIG_HAVE_CLK
94extern void pm_clk_add_notifier(struct bus_type *bus,
95 struct pm_clk_notifier_block *clknb);
96#else
97static 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

source code of linux/include/linux/pm_clock.h