LXR linux/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
  21struct device_node;
  22
  23#ifdef CONFIG_MFD_SYSCON
  24extern struct regmap *syscon_node_to_regmap(struct device_node *np);
  25extern struct regmap *syscon_regmap_lookup_by_compatible(const char *s);
  26extern struct regmap *syscon_regmap_lookup_by_pdevname(const char *s);
  27extern struct regmap *syscon_regmap_lookup_by_phandle(
  28                                        struct device_node *np,
  29                                        const char *property);
  30#else
  31static inline struct regmap *syscon_node_to_regmap(struct device_node *np)
  32{
  33        return ERR_PTR(-ENOTSUPP);
  34}
  35
  36static inline struct regmap *syscon_regmap_lookup_by_compatible(const char *s)
  37{
  38        return ERR_PTR(-ENOTSUPP);
  39}
  40
  41static inline struct regmap *syscon_regmap_lookup_by_pdevname(const char *s)
  42{
  43        return ERR_PTR(-ENOTSUPP);
  44}
  45
  46static 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__ */
  55