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    Subject[PATCH v1] ARM: RX51: Set system_rev from ATAGS
    Date
    This fixed a regression with DT boot compared to legacy boot.

    Signed-off-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@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..bab814d 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_set_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_set_system_rev(tags);
    omap_reserve();
    }

    --
    1.9.1
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