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
  20struct device_node;
  21
  22#ifdef CONFIG_MFD_SYSCON
  23extern struct regmap *syscon_node_to_regmap(struct device_node *np);
  24extern struct regmap *syscon_regmap_lookup_by_compatible(const char *s);
  25extern struct regmap *syscon_regmap_lookup_by_pdevname(const char *s);
  26extern struct regmap *syscon_regmap_lookup_by_phandle(
  27                                        struct device_node *np,
  28                                        const char *property);
  29#else
  30static inline struct regmap *syscon_node_to_regmap(struct device_node *np)
  31{
  32        return ERR_PTR(-ENOSYS);
  33}
  34
  35static inline struct regmap *syscon_regmap_lookup_by_compatible(const char *s)
  36{
  37        return ERR_PTR(-ENOSYS);
  38}
  39
  40static inline struct regmap *syscon_regmap_lookup_by_pdevname(const char *s)
  41{
  42        return ERR_PTR(-ENOSYS);
  43}
  44
  45static inline struct regmap *syscon_regmap_lookup_by_phandle(
  46                                        struct device_node *np,
  47                                        const char *property)
  48{
  49        return ERR_PTR(-ENOSYS);
  50}
  51#endif
  52
  53#endif /* __LINUX_MFD_SYSCON_H__ */
  54