linux-kernelorg-stable/include/linux/mfd/syscon.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * System Control Driver
 *
 * Copyright (C) 2012 Freescale Semiconductor, Inc.
 * Copyright (C) 2012 Linaro Ltd.
 *
 * Author: Dong Aisheng <dong.aisheng@linaro.org>
 */

#ifndef __LINUX_MFD_SYSCON_H__
#define __LINUX_MFD_SYSCON_H__

#include <linux/err.h>
#include <linux/errno.h>

struct device_node;

#ifdef CONFIG_MFD_SYSCON
struct regmap *device_node_to_regmap(struct device_node *np);
struct regmap *syscon_node_to_regmap(struct device_node *np);
struct regmap *syscon_regmap_lookup_by_compatible(const char *s);
struct regmap *syscon_regmap_lookup_by_phandle(struct device_node *np,
					       const char *property);
struct regmap *syscon_regmap_lookup_by_phandle_args(struct device_node *np,
						    const char *property,
						    int arg_count,
						    unsigned int *out_args);
struct regmap *syscon_regmap_lookup_by_phandle_optional(struct device_node *np,
							const char *property);
int of_syscon_register_regmap(struct device_node *np,
			      struct regmap *regmap);
#else
static inline struct regmap *device_node_to_regmap(struct device_node *np)
{
	return ERR_PTR(-ENOTSUPP);
}

static inline struct regmap *syscon_node_to_regmap(struct device_node *np)
{
	return ERR_PTR(-ENOTSUPP);
}

static inline struct regmap *syscon_regmap_lookup_by_compatible(const char *s)
{
	return ERR_PTR(-ENOTSUPP);
}

static inline struct regmap *syscon_regmap_lookup_by_phandle(
					struct device_node *np,
					const char *property)
{
	return ERR_PTR(-ENOTSUPP);
}

static inline struct regmap *syscon_regmap_lookup_by_phandle_args(
					struct device_node *np,
					const char *property,
					int arg_count,
					unsigned int *out_args)
{
	return ERR_PTR(-ENOTSUPP);
}

static inline struct regmap *syscon_regmap_lookup_by_phandle_optional(
					struct device_node *np,
					const char *property)
{
	return NULL;
}

static inline int of_syscon_register_regmap(struct device_node *np,
					struct regmap *regmap)
{
	return -EOPNOTSUPP;
}

#endif

#endif /* __LINUX_MFD_SYSCON_H__ */