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ARM: 8496/1: OMAP: RX51: save ATAGS data in the early boot stage 

This fixes a regression with device tree based booting compared to legacy booting for n900 to make the n900 legacy user space to also work with device tree based booting

Signed-off-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Ivaylo Dimitrov 2016-01-01 12:49:36 +01:00 committed by Russell King
parent 6e0306a97d
commit 8c51b03493
1 changed files with 11 additions and 1 deletions
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12
arch/arm/mach-omap2/board-generic.c
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@ -16,6 +16,7 @@
#include <linux/of_platform.h> #include <linux/of_platform.h>
#include <linux/irqdomain.h> #include <linux/irqdomain.h>
#include <asm/setup.h>
#include <asm/mach/arch.h> #include <asm/mach/arch.h>
#include "common.h" #include "common.h"
@ -76,8 +77,17 @@ static const char *const n900_boards_compat[] __initconst = {
NULL, NULL,
}; };
/* 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));
omap_reserve();
}
DT_MACHINE_START(OMAP3_N900_DT, "Nokia RX-51 board") DT_MACHINE_START(OMAP3_N900_DT, "Nokia RX-51 board")
.reserve = omap_reserve, .reserve = rx51_reserve,
.map_io = omap3_map_io, .map_io = omap3_map_io,
.init_early = omap3430_init_early, .init_early = omap3430_init_early,
.init_machine = omap_generic_init, .init_machine = omap_generic_init,