1/* SPDX-License-Identifier: GPL-2.0+ */
2/*
3 * An inteface for configuring a hardware via u-boot environment.
4 *
5 * Copyright (c) 2009  MontaVista Software, Inc.
6 * Copyright 2011 Freescale Semiconductor, Inc.
7 *
8 * Author: Anton Vorontsov <avorontsov@ru.mvista.com>
9 */
10
11#ifndef _HWCONFIG_H
12#define _HWCONFIG_H
13
14#include <linux/types.h>
15#include <linux/errno.h>
16
17#ifdef CONFIG_HWCONFIG
18
19extern int hwconfig_f(const char *opt, char *buf);
20extern const char *hwconfig_arg_f(const char *opt, size_t *arglen, char *buf);
21extern int hwconfig_arg_cmp_f(const char *opt, const char *arg, char *buf);
22extern int hwconfig_sub_f(const char *opt, const char *subopt, char *buf);
23extern const char *hwconfig_subarg_f(const char *opt, const char *subopt,
24				     size_t *subarglen, char *buf);
25extern int hwconfig_subarg_cmp_f(const char *opt, const char *subopt,
26				 const char *subarg, char *buf);
27#else
28
29static inline int hwconfig_f(const char *opt, char *buf)
30{
31	return -ENOSYS;
32}
33
34static inline const char *hwconfig_arg_f(const char *opt, size_t *arglen,
35					 char *buf)
36{
37	*arglen = 0;
38	return "";
39}
40
41static inline int hwconfig_arg_cmp_f(const char *opt, const char *arg,
42				     char *buf)
43{
44	return -ENOSYS;
45}
46
47static inline int hwconfig_sub_f(const char *opt, const char *subopt, char *buf)
48{
49	return -ENOSYS;
50}
51
52static inline const char *hwconfig_subarg_f(const char *opt, const char *subopt,
53					    size_t *subarglen, char *buf)
54{
55	*subarglen = 0;
56	return "";
57}
58
59static inline int hwconfig_subarg_cmp_f(const char *opt, const char *subopt,
60					const char *subarg, char *buf)
61{
62	return -ENOSYS;
63}
64
65#endif /* CONFIG_HWCONFIG */
66
67static inline int hwconfig(const char *opt)
68{
69	return hwconfig_f(opt, NULL);
70}
71
72static inline const char *hwconfig_arg(const char *opt, size_t *arglen)
73{
74	return hwconfig_arg_f(opt, arglen, NULL);
75}
76
77static inline int hwconfig_arg_cmp(const char *opt, const char *arg)
78{
79	return hwconfig_arg_cmp_f(opt, arg, NULL);
80}
81
82static inline int hwconfig_sub(const char *opt, const char *subopt)
83{
84	return hwconfig_sub_f(opt, subopt, NULL);
85}
86
87static inline const char *hwconfig_subarg(const char *opt, const char *subopt,
88					  size_t *subarglen)
89{
90	return hwconfig_subarg_f(opt, subopt, subarglen, NULL);
91}
92
93static inline int hwconfig_subarg_cmp(const char *opt, const char *subopt,
94				      const char *subarg)
95{
96	return hwconfig_subarg_cmp_f(opt, subopt, subarg, NULL);
97}
98
99#endif /* _HWCONFIG_H */
100