[PATCH 07/10] ARM: ux500: Provide local timer support for Device Tree

[Lee Jones]

This enables local timer (AKA: private timer) support for
all u8500 based hardware using DT.

Signed-off-by: Lee Jones <lee.jones at linaro.org>
---
 arch/arm/boot/dts/db8500.dtsi    |    6 ++++++
 arch/arm/mach-ux500/localtimer.c |   18 +++++++++++++++++-
 2 files changed, 23 insertions(+), 1 deletions(-)

diff --git a/arch/arm/boot/dts/db8500.dtsi b/arch/arm/boot/dts/db8500.dtsi
index cce5df8..35d0146 100644
--- a/arch/arm/boot/dts/db8500.dtsi
+++ b/arch/arm/boot/dts/db8500.dtsi
@@ -34,6 +34,12 @@
 			interrupts = <7>;
 		};
 
+		timer at a0410600 {
+			compatible = "arm,smp-twd";
+			reg = <0xa0410600 0x20>;
+			interrupts = <1 13 0x304>;
+		};
+
 		rtc at 80154000 {
 			compatible = "stericsson,db8500-rtc";
 			reg = <0x80154000 0x1000>;
diff --git a/arch/arm/mach-ux500/localtimer.c b/arch/arm/mach-ux500/localtimer.c
index 5ba1133..295e580 100644
--- a/arch/arm/mach-ux500/localtimer.c
+++ b/arch/arm/mach-ux500/localtimer.c
@@ -14,6 +14,10 @@
 #include <linux/smp.h>
 #include <linux/clockchips.h>
 
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+
 #include <asm/irq.h>
 #include <asm/smp_twd.h>
 #include <asm/localtimer.h>
@@ -23,7 +27,19 @@
  */
 int __cpuinit local_timer_setup(struct clock_event_device *evt)
 {
-	evt->irq = IRQ_LOCALTIMER;
+	struct device_node *np;
+
+	np = of_find_compatible_node(NULL, NULL, "arm,smp-twd");
+	if (np) {
+		if (!twd_base) {
+			twd_base = of_iomap(np, 0);
+			WARN_ON(!twd_base);
+		}
+		evt->irq = irq_of_parse_and_map(np, 0);
+	}
+	else
+		evt->irq = IRQ_LOCALTIMER;
+
 	twd_timer_setup(evt);
 	return 0;
 }
-- 
1.7.5.4