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>

2 files changed, 12 insertions, 0 deletions

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);