include/hwconfig.h

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