syscon.h

 1/* SPDX-License-Identifier: GPL-2.0-or-later */
 2/*
 3 * System Control Driver
 4 *
 5 * Copyright (C) 2012 Freescale Semiconductor, Inc.
 6 * Copyright (C) 2012 Linaro Ltd.
 7 *
 8 * Author: Dong Aisheng <dong.aisheng@linaro.org>
 9 */
10
11#ifndef __LINUX_MFD_SYSCON_H__
12#define __LINUX_MFD_SYSCON_H__
13
14#include <linux/err.h>
15#include <linux/errno.h>
16
17struct device_node;
18
19#ifdef CONFIG_MFD_SYSCON
20struct regmap *device_node_to_regmap(struct device_node *np);
21struct regmap *syscon_node_to_regmap(struct device_node *np);
22struct regmap *syscon_regmap_lookup_by_compatible(const char *s);
23struct regmap *syscon_regmap_lookup_by_phandle(struct device_node *np,
24					       const char *property);
25struct regmap *syscon_regmap_lookup_by_phandle_args(struct device_node *np,
26						    const char *property,
27						    int arg_count,
28						    unsigned int *out_args);
29struct regmap *syscon_regmap_lookup_by_phandle_optional(struct device_node *np,
30							const char *property);
31int of_syscon_register_regmap(struct device_node *np,
32			      struct regmap *regmap);
33#else
34static inline struct regmap *device_node_to_regmap(struct device_node *np)
35{
36	return ERR_PTR(-ENOTSUPP);
37}
38
39static inline struct regmap *syscon_node_to_regmap(struct device_node *np)
40{
41	return ERR_PTR(-ENOTSUPP);
42}
43
44static inline struct regmap *syscon_regmap_lookup_by_compatible(const char *s)
45{
46	return ERR_PTR(-ENOTSUPP);
47}
48
49static inline struct regmap *syscon_regmap_lookup_by_phandle(
50					struct device_node *np,
51					const char *property)
52{
53	return ERR_PTR(-ENOTSUPP);
54}
55
56static inline struct regmap *syscon_regmap_lookup_by_phandle_args(
57					struct device_node *np,
58					const char *property,
59					int arg_count,
60					unsigned int *out_args)
61{
62	return ERR_PTR(-ENOTSUPP);
63}
64
65static inline struct regmap *syscon_regmap_lookup_by_phandle_optional(
66					struct device_node *np,
67					const char *property)
68{
69	return NULL;
70}
71
72static inline int of_syscon_register_regmap(struct device_node *np,
73					struct regmap *regmap)
74{
75	return -EOPNOTSUPP;
76}
77
78#endif
79
80#endif /* __LINUX_MFD_SYSCON_H__ */