include/hwconfig.h

   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
  19 extern int hwconfig_f(const char *opt, char *buf);
  20 extern const char *hwconfig_arg_f(const char *opt, size_t *arglen, char *buf);
  21 extern int hwconfig_arg_cmp_f(const char *opt, const char *arg, char *buf);
  22 extern int hwconfig_sub_f(const char *opt, const char *subopt, char *buf);
  23 extern const char *hwconfig_subarg_f(const char *opt, const char *subopt,
  24                                      size_t *subarglen, char *buf);
  25 extern int hwconfig_subarg_cmp_f(const char *opt, const char *subopt,
  26                                  const char *subarg, char *buf);
  27 #else
  28
  29 static inline int hwconfig_f(const char *opt, char *buf)
  30 {
  31         return -ENOSYS;
  32 }
  33
  34 static inline const char *hwconfig_arg_f(const char *opt, size_t *arglen,
  35                                          char *buf)
  36 {
  37         *arglen = 0;
  38         return "";
  39 }
  40
  41 static inline int hwconfig_arg_cmp_f(const char *opt, const char *arg,
  42                                      char *buf)
  43 {
  44         return -ENOSYS;
  45 }
  46
  47 static inline int hwconfig_sub_f(const char *opt, const char *subopt, char *buf)
  48 {
  49         return -ENOSYS;
  50 }
  51
  52 static 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
  59 static 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
  67 static inline int hwconfig(const char *opt)
  68 {
  69         return hwconfig_f(opt, NULL);
  70 }
  71
  72 static inline const char *hwconfig_arg(const char *opt, size_t *arglen)
  73 {
  74         return hwconfig_arg_f(opt, arglen, NULL);
  75 }
  76
  77 static inline int hwconfig_arg_cmp(const char *opt, const char *arg)
  78 {
  79         return hwconfig_arg_cmp_f(opt, arg, NULL);
  80 }
  81
  82 static inline int hwconfig_sub(const char *opt, const char *subopt)
  83 {
  84         return hwconfig_sub_f(opt, subopt, NULL);
  85 }
  86
  87 static 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
  93 static 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 */