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ARM: OMAP2+: Set system_rev from ATAGS for n900

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This fixed a regression with DT boot compared to legacy boot.

Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
Tested-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
[tony@atomide.com: edited patch subject to follow standard]
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Ivaylo Dimitrov 2016-02-10 20:23:02 +02:00 committed by Tony Lindgren
parent 388f7b1d6e
commit 5f35dc47c1
1 changed files with 21 additions and 1 deletions
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22
arch/arm/mach-omap2/board-generic.c
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@ -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();
}