Re: [PATCH v1] ARM: RX51: Set system_rev from ATAGS

From: Tony Lindgren
Date: Wed Feb 10 2016 - 19:19:50 EST


* Ivaylo Dimitrov <ivo.g.dimitrov.75@xxxxxxxxx> [160210 10:24]:
> This fixed a regression with DT boot compared to legacy boot.
>
> Signed-off-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@xxxxxxxxx>

Thanks, applying into omap-for-v4.5/fixes with Pali's ack.

Regards,

Tony

> ---
> 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
>