3d23799093
commit df73de9b0d ("mfd: syscon: Return -ENOSYS if CONFIG_MFD_SYSCON
is not enabled") introduced fallbacks for APIs, but missed out on adding
the header file. This would work only if linux/err.h is also included
in the source code from where this file is included. It would be better
to include linux/err.h in file to remove possible build errors.
Without this patch, we get following and similar build errors if this
header file is included in some source file and CONFIG_MFD_SYSCON is
not enabled.
include/linux/mfd/syscon.h: In function ‘syscon_node_to_regmap’:
include/linux/mfd/syscon.h:30:2: error: implicit declaration of function ‘ERR_PTR’ [-Werror=implicit-function-declaration]
return ERR_PTR(-ENOSYS);
^
include/linux/mfd/syscon.h:30:18: error: ‘ENOSYS’ undeclared (first use in this function)
return ERR_PTR(-ENOSYS);
^
Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
/*
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* System Control Driver
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*
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* Copyright (C) 2012 Freescale Semiconductor, Inc.
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* Copyright (C) 2012 Linaro Ltd.
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*
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* Author: Dong Aisheng <dong.aisheng@linaro.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef __LINUX_MFD_SYSCON_H__
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#define __LINUX_MFD_SYSCON_H__
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#include <linux/err.h>
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struct device_node;
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#ifdef CONFIG_MFD_SYSCON
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extern struct regmap *syscon_node_to_regmap(struct device_node *np);
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extern struct regmap *syscon_regmap_lookup_by_compatible(const char *s);
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extern struct regmap *syscon_regmap_lookup_by_pdevname(const char *s);
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extern struct regmap *syscon_regmap_lookup_by_phandle(
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struct device_node *np,
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const char *property);
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#else
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static inline struct regmap *syscon_node_to_regmap(struct device_node *np)
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{
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return ERR_PTR(-ENOSYS);
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}
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static inline struct regmap *syscon_regmap_lookup_by_compatible(const char *s)
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{
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return ERR_PTR(-ENOSYS);
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}
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static inline struct regmap *syscon_regmap_lookup_by_pdevname(const char *s)
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{
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return ERR_PTR(-ENOSYS);
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}
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static inline struct regmap *syscon_regmap_lookup_by_phandle(
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struct device_node *np,
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const char *property)
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{
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return ERR_PTR(-ENOSYS);
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}
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#endif
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#endif /* __LINUX_MFD_SYSCON_H__ */
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