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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_NVRAM_H
#define _LINUX_NVRAM_H
#include <linux/errno.h>
#include <uapi/linux/nvram.h>
struct nvram_ops {
ssize_t (*get_size)(void);
ssize_t (*read)(char *, size_t, loff_t *);
ssize_t (*write)(char *, size_t, loff_t *);
};
extern const struct nvram_ops arch_nvram_ops;
static inline ssize_t nvram_get_size(void)
{
#ifdef CONFIG_PPC
#else
if (arch_nvram_ops.get_size)
return arch_nvram_ops.get_size();
#endif
return -ENODEV;
}
static inline unsigned char nvram_read_byte(int addr)
{
return 0xFF;
}
static inline void nvram_write_byte(unsigned char val, int addr)
{
}
static inline ssize_t nvram_read(char *buf, size_t count, loff_t *ppos)
{
if (arch_nvram_ops.read)
return arch_nvram_ops.read(buf, count, ppos);
return -ENODEV;
}
static inline ssize_t nvram_write(char *buf, size_t count, loff_t *ppos)
{
if (arch_nvram_ops.write)
return arch_nvram_ops.write(buf, count, ppos);
return -ENODEV;
}
#endif /* _LINUX_NVRAM_H */
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