IKXCLOCK-1057 arm: mach-omap: pass panic as reason for panic reboot

"panic" string is passed as reason for panic reboot
parse cmd for explicit reboot reason strings

Change-Id: I0801f1207230dd9b3e182ef87ea49197e1eed362
Signed-off-by: Makarand karvekar <mkarvekar@motorola.com>

1 files changed, 31 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/omap3-restart.c b/arch/arm/mach-omap2/omap3-restart.c
index 923c582189e..92a177654e2 100644
--- a/arch/arm/mach-omap2/omap3-restart.c
+++ b/arch/arm/mach-omap2/omap3-restart.c
@@ -28,9 +28,40 @@
  * Resets the SoC.  For @cmd, see the 'reboot' syscall in
  * kernel/sys.c.  No return value.
  */
+
+
+static int in_panic;
+
+static int panic_prep_restart(struct notifier_block *this,
+			      unsigned long event, void *ptr)
+{
+	in_panic = 1;
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block panic_block = {
+	.notifier_call	= panic_prep_restart,
+};
+
 void omap3xxx_restart(char mode, const char *cmd)
 {
+	if (cmd != NULL) {
+		if ((strncmp(cmd, "bootloader", 10)) &&
+		    (strncmp(cmd, "recovery", 8)))
+			cmd = NULL;
+	}
+
+	if (in_panic)
+		cmd = "panic";
+
 	omap3_ctrl_write_boot_mode((cmd ? (u8)*cmd : 0));
 	omap3xxx_prm_dpll3_reset(); /* never returns */
 	while (1);
 }
+
+static int __init omap3xxx_restart_init(void)
+{
+	atomic_notifier_chain_register(&panic_notifier_list, &panic_block);
+	return 0;
+}
+early_initcall(omap3xxx_restart_init);