[mirror_ubuntu-bionic-kernel.git] / include / linux / nvmem-provider.h

/*
 * nvmem framework provider.
 *
 * Copyright (C) 2015 Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
 * Copyright (C) 2013 Maxime Ripard <maxime.ripard@free-electrons.com>
 *
 * This file is licensed under the terms of the GNU General Public
 * License version 2.  This program is licensed "as is" without any
 * warranty of any kind, whether express or implied.
 */

#ifndef _LINUX_NVMEM_PROVIDER_H
#define _LINUX_NVMEM_PROVIDER_H

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

struct nvmem_device;
struct nvmem_cell_info;
typedef int (*nvmem_reg_read_t)(void *priv, unsigned int offset,
				void *val, size_t bytes);
typedef int (*nvmem_reg_write_t)(void *priv, unsigned int offset,
				 void *val, size_t bytes);

struct nvmem_config {
	struct device		*dev;
	const char		*name;
	int			id;
	struct module		*owner;
	const struct nvmem_cell_info	*cells;
	int			ncells;
	bool			read_only;
	bool			root_only;
	nvmem_reg_read_t	reg_read;
	nvmem_reg_write_t	reg_write;
	int	size;
	int	word_size;
	int	stride;
	void	*priv;
	/* To be only used by old driver/misc/eeprom drivers */
	bool			compat;
	struct device		*base_dev;
};

#if IS_ENABLED(CONFIG_NVMEM)

struct nvmem_device *nvmem_register(const struct nvmem_config *cfg);
int nvmem_unregister(struct nvmem_device *nvmem);

#else

static inline struct nvmem_device *nvmem_register(const struct nvmem_config *c)
{
	return ERR_PTR(-ENOSYS);
}

static inline int nvmem_unregister(struct nvmem_device *nvmem)
{
	return -ENOSYS;
}

#endif /* CONFIG_NVMEM */
#endif  /* ifndef _LINUX_NVMEM_PROVIDER_H */
Commit	Line	Data
	1	/*
	2	* nvmem framework provider.
	3	*
	4	* Copyright (C) 2015 Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
	5	* Copyright (C) 2013 Maxime Ripard <maxime.ripard@free-electrons.com>
	6	*
	7	* This file is licensed under the terms of the GNU General Public
	8	* License version 2. This program is licensed "as is" without any
	9	* warranty of any kind, whether express or implied.
	10	*/
	11
	12	#ifndef _LINUX_NVMEM_PROVIDER_H
	13	#define _LINUX_NVMEM_PROVIDER_H
	14
	15	#include <linux/err.h>
	16	#include <linux/errno.h>
	17
	18	struct nvmem_device;
	19	struct nvmem_cell_info;
	20	typedef int (nvmem_reg_read_t)(void priv, unsigned int offset,
	21	void *val, size_t bytes);
	22	typedef int (nvmem_reg_write_t)(void priv, unsigned int offset,
	23	void *val, size_t bytes);
	24
	25	struct nvmem_config {
	26	struct device *dev;
	27	const char *name;
	28	int id;
	29	struct module *owner;
	30	const struct nvmem_cell_info *cells;
	31	int ncells;
	32	bool read_only;
	33	bool root_only;
	34	nvmem_reg_read_t reg_read;
	35	nvmem_reg_write_t reg_write;
	36	int size;
	37	int word_size;
	38	int stride;
	39	void *priv;
	40	/* To be only used by old driver/misc/eeprom drivers */
	41	bool compat;
	42	struct device *base_dev;
	43	};
	44
	45	#if IS_ENABLED(CONFIG_NVMEM)
	46
	47	struct nvmem_device nvmem_register(const struct nvmem_config cfg);
	48	int nvmem_unregister(struct nvmem_device *nvmem);
	49
	50	#else
	51
	52	static inline struct nvmem_device nvmem_register(const struct nvmem_config c)
	53	{
	54	return ERR_PTR(-ENOSYS);
	55	}
	56
	57	static inline int nvmem_unregister(struct nvmem_device *nvmem)
	58	{
	59	return -ENOSYS;
	60	}
	61
	62	#endif /* CONFIG_NVMEM */
	63	#endif /* ifndef _LINUX_NVMEM_PROVIDER_H */