From eed0de27726a55f145490619510c8ec58c9dc767 Mon Sep 17 00:00:00 2001
From: Santosh Shilimkar <santosh.shilimkar@ti.com>
Date: Wed, 4 Jul 2012 18:32:32 +0530
Subject: [PATCH] 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>
---
 arch/arm/boot/dts/omap4.dtsi | 6 ++++++
 arch/arm/mach-omap2/timer.c  | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/arch/arm/boot/dts/omap4.dtsi b/arch/arm/boot/dts/omap4.dtsi
index cb18d2a2971c..2b670ab86eae 100644
--- a/arch/arm/boot/dts/omap4.dtsi
+++ b/arch/arm/boot/dts/omap4.dtsi
@@ -45,6 +45,12 @@
 		cache-level = <2>;
 	};
 
+	local-timer@0x48240600 {
+		compatible = "arm,cortex-a9-twd-timer";
+		reg = <0x48240600 0x20>;
+		interrupts = <1 13 0x304>;
+	};
+
 	/*
 	 * The soc node represents the soc top level view. It is uses for IPs
 	 * that are not memory mapped in the MPU view or for the MPU itself.
diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c
index 2ff6d41ec6c6..31f9c936125f 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 @@ static void __init omap4_timer_init(void)
 	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);