powerpc/nvram: Enable use Generic NVRAM driver for different size chips
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>
diff --git a/arch/powerpc/include/asm/nvram.h b/arch/powerpc/include/asm/nvram.h
index efde5ac..6c587ed 100644
--- a/arch/powerpc/include/asm/nvram.h
+++ b/arch/powerpc/include/asm/nvram.h
@@ -107,6 +107,9 @@
/* 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);