include/linux/mfd/syscon.h

   1 /*
   2  * System Control Driver
   3  *
   4  * Copyright (C) 2012 Freescale Semiconductor, Inc.
   5  * Copyright (C) 2012 Linaro Ltd.
   6  *
   7  * Author: Dong Aisheng <dong.aisheng@linaro.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  */
  14
  15 #ifndef __LINUX_MFD_SYSCON_H__
  16 #define __LINUX_MFD_SYSCON_H__
  17
  18 #include <linux/err.h>
  19 #include <linux/errno.h>
  20
  21 struct device_node;
  22
  23 #ifdef CONFIG_MFD_SYSCON
  24 extern struct regmap *syscon_node_to_regmap(struct device_node *np);
  25 extern struct regmap *syscon_regmap_lookup_by_compatible(const char *s);
  26 extern struct regmap *syscon_regmap_lookup_by_pdevname(const char *s);
  27 extern struct regmap *syscon_regmap_lookup_by_phandle(
  28                                         struct device_node *np,
  29                                         const char *property);
  30 #else
  31 static inline struct regmap *syscon_node_to_regmap(struct device_node *np)
  32 {
  33         return ERR_PTR(-ENOTSUPP);
  34 }
  35
  36 static inline struct regmap *syscon_regmap_lookup_by_compatible(const char *s)
  37 {
  38         return ERR_PTR(-ENOTSUPP);
  39 }
  40
  41 static inline struct regmap *syscon_regmap_lookup_by_pdevname(const char *s)
  42 {
  43         return ERR_PTR(-ENOTSUPP);
  44 }
  45
  46 static inline struct regmap *syscon_regmap_lookup_by_phandle(
  47                                         struct device_node *np,
  48                                         const char *property)
  49 {
  50         return ERR_PTR(-ENOTSUPP);
  51 }
  52 #endif
  53
  54 #endif /* __LINUX_MFD_SYSCON_H__ */