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Commit 5f35dc47 authored by Ivaylo Dimitrov's avatar Ivaylo Dimitrov Committed by Tony Lindgren
Browse files

ARM: OMAP2+: Set system_rev from ATAGS for n900 



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

Reviewed-by: default avatarPali Rohár <pali.rohar@gmail.com>
Tested-by: default avatarPali Rohár <pali.rohar@gmail.com>
Signed-off-by: default avatarIvaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
[tony@atomide.com: edited patch subject to follow standard]
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent 388f7b1d

arch/arm/mach-omap2/board-generic.c

+21 −1
Original line number Diff line number Diff line
@@ -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();

}