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powerpc/nvram: Enable use Generic NVRAM driver for different size chips

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Remove the reliance on a staticly defined NVRAM size, allowing
platforms to support NVRAMs with sizes differing from the standard.

A fall back value is provided for platforms not supporting this extension.

Signed-off-by: Martyn Welch <martyn.welch@gefanuc.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Martyn Welch
2009-08-13 09:03:02 +01:00
committed by Benjamin Herrenschmidt
parent 1d6ed32226
commit d331d8305c
3 changed files with 31 additions and 7 deletions
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3
arch/powerpc/include/asm/nvram.h
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@@ -107,6 +107,9 @@ extern void pmac_xpram_write(int xpaddr, u8 data);
/* Synchronize NVRAM */
extern void nvram_sync(void);
/* Determine NVRAM size */
extern ssize_t nvram_get_size(void);
/* Normal access to NVRAM */
extern unsigned char nvram_read_byte(int i);
extern void nvram_write_byte(unsigned char c, int i);