ARM: OMAP4: Add local timer support for Device Tree

Add cortex-a9 local timer support for all OMAP4 based
SOCs using DT.

Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Benoit Cousson <b-cousson@ti.com>
diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c
index 2ff6d41..31f9c93 100644
--- a/arch/arm/mach-omap2/timer.c
+++ b/arch/arm/mach-omap2/timer.c
@@ -36,6 +36,7 @@
 #include <linux/clocksource.h>
 #include <linux/clockchips.h>
 #include <linux/slab.h>
+#include <linux/of.h>
 
 #include <asm/mach/time.h>
 #include <plat/dmtimer.h>
@@ -386,6 +387,11 @@
 	if (omap_rev() != OMAP4430_REV_ES1_0) {
 		int err;
 
+		if (of_have_populated_dt()) {
+			twd_local_timer_of_register();
+			return;
+		}
+
 		err = twd_local_timer_register(&twd_local_timer);
 		if (err)
 			pr_err("twd_local_timer_register failed %d\n", err);