[PATCH] ARM: RX51: Set system_rev from ATAGS

[Ivaylo Dimitrov]

Signed-off-by: Ivaylo Dimitrov <ivo.g.dimitrov...@gmail.com>
---
 arch/arm/mach-omap2/board-generic.c | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-omap2/board-generic.c 
b/arch/arm/mach-omap2/board-generic.c
index 8098272..b91fabe 100644
--- a/arch/arm/mach-omap2/board-generic.c
+++ b/arch/arm/mach-omap2/board-generic.c
@@ -18,6 +18,7 @@
 
 #include <asm/setup.h>
 #include <asm/mach/arch.h>
+#include <asm/system_info.h>
 
 #include "common.h"
 
@@ -77,12 +78,31 @@ static const char *const n900_boards_compat[] __initconst = 
{
        NULL,
 };
 
+/* Set system_rev from atags */
+static void __init rx51_system_rev(const struct tag *tags)
+{
+       const struct tag *tag;
+
+       if (tags->hdr.tag != ATAG_CORE)
+               return;
+
+       for_each_tag(tag, tags) {
+               if (tag->hdr.tag == ATAG_REVISION) {
+                       system_rev = tag->u.revision.rev;
+                       break;
+               }
+       }
+}
+
 /* Legacy userspace on Nokia N900 needs ATAGS exported in /proc/atags,
  * save them while the data is still not overwritten
  */
 static void __init rx51_reserve(void)
 {
-       save_atags((const struct tag *)(PAGE_OFFSET + 0x100));
+       const struct tag *tags = (const struct tag *)(PAGE_OFFSET + 0x100);
+
+       save_atags(tags);
+       rx51_system_rev(tags);
        omap_reserve();
 }
 
-- 
1.9.1