include/linux/mfd/syscon.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * System Control Driver
   4  *
   5  * Copyright (C) 2012 Freescale Semiconductor, Inc.
   6  * Copyright (C) 2012 Linaro Ltd.
   7  *
   8  * Author: Dong Aisheng <dong.aisheng@linaro.org>
   9  */
  10
  11 #ifndef __LINUX_MFD_SYSCON_H__
  12 #define __LINUX_MFD_SYSCON_H__
  13
  14 #include <linux/err.h>
  15 #include <linux/errno.h>
  16
  17 struct device_node;
  18
  19 #ifdef CONFIG_MFD_SYSCON
  20 struct regmap *device_node_to_regmap(struct device_node *np);
  21 struct regmap *syscon_node_to_regmap(struct device_node *np);
  22 struct regmap *syscon_regmap_lookup_by_compatible(const char *s);
  23 struct regmap *syscon_regmap_lookup_by_phandle(struct device_node *np,
  24                                                const char *property);
  25 struct regmap *syscon_regmap_lookup_by_phandle_args(struct device_node *np,
  26                                                     const char *property,
  27                                                     int arg_count,
  28                                                     unsigned int *out_args);
  29 struct regmap *syscon_regmap_lookup_by_phandle_optional(struct device_node *np,
  30                                                         const char *property);
  31 #else
  32 static inline struct regmap *device_node_to_regmap(struct device_node *np)
  33 {
  34         return ERR_PTR(-ENOTSUPP);
  35 }
  36
  37 static inline struct regmap *syscon_node_to_regmap(struct device_node *np)
  38 {
  39         return ERR_PTR(-ENOTSUPP);
  40 }
  41
  42 static inline struct regmap *syscon_regmap_lookup_by_compatible(const char *s)
  43 {
  44         return ERR_PTR(-ENOTSUPP);
  45 }
  46
  47 static inline struct regmap *syscon_regmap_lookup_by_phandle(
  48                                         struct device_node *np,
  49                                         const char *property)
  50 {
  51         return ERR_PTR(-ENOTSUPP);
  52 }
  53
  54 static inline struct regmap *syscon_regmap_lookup_by_phandle_args(
  55                                         struct device_node *np,
  56                                         const char *property,
  57                                         int arg_count,
  58                                         unsigned int *out_args)
  59 {
  60         return ERR_PTR(-ENOTSUPP);
  61 }
  62
  63 static inline struct regmap *syscon_regmap_lookup_by_phandle_optional(
  64                                         struct device_node *np,
  65                                         const char *property)
  66 {
  67         return NULL;
  68 }
  69
  70 #endif
  71
  72 #endif /* __LINUX_MFD_SYSCON_H__ */