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omap4: Check warm reset for reboot mode validity

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Since the SAR registers are filled with garbage on cold reset, this checks for a
warm reset to assert the validity of reboot mode.

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
This commit is contained in:
Paul Kocialkowski 2016-02-27 19:19:08 +01:00 committed by Tom Rini
parent faec3f9841
commit 69847dd8f0
1 changed files with 4 additions and 0 deletions
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4
arch/arm/cpu/armv7/omap4/boot.c
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@ -9,6 +9,7 @@
#include <common.h>
#include <asm/io.h>
#include <asm/omap_common.h>
#include <asm/arch/sys_proto.h>
#include <spl.h>
static u32 boot_devices[] = {
@ -67,6 +68,9 @@ int omap_reboot_mode(char *mode, unsigned int length)
if (length < 2)
return -1;
if (!warm_reset())
return -1;
limit = (length < OMAP_REBOOT_REASON_SIZE) ? length :
OMAP_REBOOT_REASON_SIZE;