arm: zynq: Enable arm_global_timer

Zynq is based on an ARM Cortex-A9 MPCore, which features the
arm_global_timer in its SCU. Therefore enable the timer for Zynq.

Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/arch/arm/boot/dts/zynq-7000.dtsi b/arch/arm/boot/dts/zynq-7000.dtsi
index e32b92b..e7f73b2 100644
--- a/arch/arm/boot/dts/zynq-7000.dtsi
+++ b/arch/arm/boot/dts/zynq-7000.dtsi
@@ -92,6 +92,14 @@
 			};
 		};
 
+		global_timer: timer@f8f00200 {
+			compatible = "arm,cortex-a9-global-timer";
+			reg = <0xf8f00200 0x20>;
+			interrupts = <1 11 0x301>;
+			interrupt-parent = <&intc>;
+			clocks = <&clkc 4>;
+		};
+
 		ttc0: ttc0@f8001000 {
 			interrupt-parent = <&intc>;
 			interrupts = < 0 10 4 0 11 4 0 12 4 >;
diff --git a/arch/arm/mach-zynq/Kconfig b/arch/arm/mach-zynq/Kconfig
index 04f8a4a..6b04260 100644
--- a/arch/arm/mach-zynq/Kconfig
+++ b/arch/arm/mach-zynq/Kconfig
@@ -13,5 +13,6 @@
 	select HAVE_SMP
 	select SPARSE_IRQ
 	select CADENCE_TTC_TIMER
+	select ARM_GLOBAL_TIMER
 	help
 	  Support for Xilinx Zynq ARM Cortex A9 Platform