a084dbf659
By implementing an arch_nvram_ops struct, a platform can re-use the drivers/char/nvram.c module without needing any arch-specific code in that module. Atari does so here. Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
47 lines
995 B
C
47 lines
995 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_NVRAM_H
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#define _LINUX_NVRAM_H
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#include <linux/errno.h>
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#include <uapi/linux/nvram.h>
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struct nvram_ops {
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ssize_t (*get_size)(void);
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ssize_t (*read)(char *, size_t, loff_t *);
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ssize_t (*write)(char *, size_t, loff_t *);
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};
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extern const struct nvram_ops arch_nvram_ops;
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static inline ssize_t nvram_get_size(void)
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{
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if (arch_nvram_ops.get_size)
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return arch_nvram_ops.get_size();
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return -ENODEV;
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}
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static inline unsigned char nvram_read_byte(int addr)
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{
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return 0xFF;
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}
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static inline void nvram_write_byte(unsigned char val, int addr)
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{
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}
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static inline ssize_t nvram_read(char *buf, size_t count, loff_t *ppos)
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{
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if (arch_nvram_ops.read)
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return arch_nvram_ops.read(buf, count, ppos);
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return -ENODEV;
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}
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static inline ssize_t nvram_write(char *buf, size_t count, loff_t *ppos)
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{
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if (arch_nvram_ops.write)
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return arch_nvram_ops.write(buf, count, ppos);
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return -ENODEV;
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}
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#endif /* _LINUX_NVRAM_H */
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