nvmem-consumer.h
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/*
* nvmem framework consumer.
*
* 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_CONSUMER_H
#define _LINUX_NVMEM_CONSUMER_H
#include <linux/err.h>
#include <linux/errno.h>
struct device;
struct device_node;
/* consumer cookie */
struct nvmem_cell;
struct nvmem_device;
struct nvmem_cell_info {
const char *name;
unsigned int offset;
unsigned int bytes;
unsigned int bit_offset;
unsigned int nbits;
};
#if IS_ENABLED(CONFIG_NVMEM)
/* Cell based interface */
struct nvmem_cell *nvmem_cell_get(struct device *dev, const char *name);
struct nvmem_cell *devm_nvmem_cell_get(struct device *dev, const char *name);
void nvmem_cell_put(struct nvmem_cell *cell);
void devm_nvmem_cell_put(struct device *dev, struct nvmem_cell *cell);
void *nvmem_cell_read(struct nvmem_cell *cell, size_t *len);
int nvmem_cell_write(struct nvmem_cell *cell, void *buf, size_t len);
int nvmem_cell_read_u32(struct device *dev, const char *cell_id, u32 *val);
/* direct nvmem device read/write interface */
struct nvmem_device *nvmem_device_get(struct device *dev, const char *name);
struct nvmem_device *devm_nvmem_device_get(struct device *dev,
const char *name);
void nvmem_device_put(struct nvmem_device *nvmem);
void devm_nvmem_device_put(struct device *dev, struct nvmem_device *nvmem);
int nvmem_device_read(struct nvmem_device *nvmem, unsigned int offset,
size_t bytes, void *buf);
int nvmem_device_write(struct nvmem_device *nvmem, unsigned int offset,
size_t bytes, void *buf);
ssize_t nvmem_device_cell_read(struct nvmem_device *nvmem,
struct nvmem_cell_info *info, void *buf);
int nvmem_device_cell_write(struct nvmem_device *nvmem,
struct nvmem_cell_info *info, void *buf);
#else
static inline struct nvmem_cell *nvmem_cell_get(struct device *dev,
const char *name)
{
return ERR_PTR(-ENOSYS);
}
static inline struct nvmem_cell *devm_nvmem_cell_get(struct device *dev,
const char *name)
{
return ERR_PTR(-ENOSYS);
}
static inline void devm_nvmem_cell_put(struct device *dev,
struct nvmem_cell *cell)
{
}
static inline void nvmem_cell_put(struct nvmem_cell *cell)
{
}
static inline void *nvmem_cell_read(struct nvmem_cell *cell, size_t *len)
{
return ERR_PTR(-ENOSYS);
}
static inline int nvmem_cell_write(struct nvmem_cell *cell,
const char *buf, size_t len)
{
return -ENOSYS;
}
static inline int nvmem_cell_read_u32(struct device *dev,
const char *cell_id, u32 *val)
{
return -ENOSYS;
}
static inline struct nvmem_device *nvmem_device_get(struct device *dev,
const char *name)
{
return ERR_PTR(-ENOSYS);
}
static inline struct nvmem_device *devm_nvmem_device_get(struct device *dev,
const char *name)
{
return ERR_PTR(-ENOSYS);
}
static inline void nvmem_device_put(struct nvmem_device *nvmem)
{
}
static inline void devm_nvmem_device_put(struct device *dev,
struct nvmem_device *nvmem)
{
}
static inline ssize_t nvmem_device_cell_read(struct nvmem_device *nvmem,
struct nvmem_cell_info *info,
void *buf)
{
return -ENOSYS;
}
static inline int nvmem_device_cell_write(struct nvmem_device *nvmem,
struct nvmem_cell_info *info,
void *buf)
{
return -ENOSYS;
}
static inline int nvmem_device_read(struct nvmem_device *nvmem,
unsigned int offset, size_t bytes,
void *buf)
{
return -ENOSYS;
}
static inline int nvmem_device_write(struct nvmem_device *nvmem,
unsigned int offset, size_t bytes,
void *buf)
{
return -ENOSYS;
}
#endif /* CONFIG_NVMEM */
#if IS_ENABLED(CONFIG_NVMEM) && IS_ENABLED(CONFIG_OF)
struct nvmem_cell *of_nvmem_cell_get(struct device_node *np,
const char *name);
struct nvmem_device *of_nvmem_device_get(struct device_node *np,
const char *name);
#else
static inline struct nvmem_cell *of_nvmem_cell_get(struct device_node *np,
const char *name)
{
return ERR_PTR(-ENOSYS);
}
static inline struct nvmem_device *of_nvmem_device_get(struct device_node *np,
const char *name)
{
return ERR_PTR(-ENOSYS);
}
#endif /* CONFIG_NVMEM && CONFIG_OF */
#endif /* ifndef _LINUX_NVMEM_CONSUMER_H */