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Linux/include/linux/mfd/syscon.h

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

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