[POWERPC] Maple: use mmio nvram

Some systems supported by the maple platform (e.g. JS2x blades running
SLOF) are able to use the mmio_nvram backend for reading and writing
nvram.  This is an improvement over the current situation -- no nvram
access from userspace at all.

Select MMIO_NVRAM for the maple platform.

Initialize the mmio_nvram backend from maple setup code.

Signed-off-by: Nathan Lynch <ntl@pobox.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 901f12d..5f80f0b 100644 (file)
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -491,6 +491,7 @@ config PPC_MAPLE
        select PPC_970_NAP
        select PPC_NATIVE
        select PPC_RTAS
+       select MMIO_NVRAM
        default n
        help
           This option enables support for the Maple 970FX Evaluation Board.

diff --git a/arch/powerpc/platforms/maple/setup.c b/arch/powerpc/platforms/maple/setup.c
index 50855d4..82d3f9e 100644 (file)
--- a/arch/powerpc/platforms/maple/setup.c
+++ b/arch/powerpc/platforms/maple/setup.c
@@ -62,6 +62,7 @@
 #include <asm/mpic.h>
 #include <asm/rtas.h>
 #include <asm/udbg.h>
+#include <asm/nvram.h>
 
 #include "maple.h"
 
@@ -195,6 +196,8 @@ void __init maple_setup_arch(void)
        maple_use_rtas_reboot_and_halt_if_present();
 
        printk(KERN_DEBUG "Using native/NAP idle loop\n");
+
+       mmio_nvram_init();
 }
 
 /*