176 lines
4.5 KiB
C
176 lines
4.5 KiB
C
/*
|
|
* 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);
|
|
|
|
const char *nvmem_dev_name(struct nvmem_device *nvmem);
|
|
|
|
#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;
|
|
}
|
|
|
|
static inline const char *nvmem_dev_name(struct nvmem_device *nvmem)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
#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 */
|