There is gpio push button on MIO22. Add it to DTS to have full board
description.

Signed-off-by: Michal Simek <michal.si...@xilinx.com>
---

 arch/arm/dts/zynqmp-zcu102.dts | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/arch/arm/dts/zynqmp-zcu102.dts b/arch/arm/dts/zynqmp-zcu102.dts
index d6cee07890c5..770d98766c73 100644
--- a/arch/arm/dts/zynqmp-zcu102.dts
+++ b/arch/arm/dts/zynqmp-zcu102.dts
@@ -12,6 +12,7 @@
 
 #include "zynqmp.dtsi"
 #include "zynqmp-clk.dtsi"
+#include <dt-bindings/gpio/gpio.h>
 
 / {
        model = "ZynqMP ZCU102 RevA";
@@ -40,6 +41,20 @@
                reg = <0x0 0x0 0x0 0x80000000>, <0x8 0x00000000 0x0 0x80000000>;
        };
 
+       gpio-keys {
+               compatible = "gpio-keys";
+               #address-cells = <1>;
+               #size-cells = <0>;
+               autorepeat;
+               sw19 {
+                       label = "sw19";
+                       gpios = <&gpio 22 GPIO_ACTIVE_HIGH>;
+                       linux,code = <108>; /* down */
+                       gpio-key,wakeup;
+                       autorepeat;
+               };
+       };
+
        leds {
                compatible = "gpio-leds";
                heartbeat_led {
-- 
1.9.1

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