arm64: dts: rockchip: Add nodes for buttons on rk3399-roc-pc

rk3399-roc-pc has a power and a recovery button, enable them.
Signed-off-by: Markus Reichl <m.reichl@fivetechno.de>
Link: https://lore.kernel.org/r/1ce152cc-bd6b-63af-7892-221e084d087f@fivetechno.deSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dts

@@ -4,6 +4,7 @@
  */
 
 /dts-v1/;
+#include <dt-bindings/input/linux-event-codes.h>
 #include <dt-bindings/pwm/pwm.h>
 #include "rk3399.dtsi"
 #include "rk3399-opp.dtsi"
@@ -28,6 +29,35 @@ clkin_gmac: external-gmac-clock {
 		#clock-cells = <0>;
 	};
 
+	adc-keys {
+		compatible = "adc-keys";
+		io-channels = <&saradc 1>;
+		io-channel-names = "buttons";
+		keyup-threshold-microvolt = <1500000>;
+		poll-interval = <100>;
+
+		recovery {
+			label = "Recovery";
+			linux,code = <KEY_VENDOR>;
+			press-threshold-microvolt = <18000>;
+		};
+	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+		autorepeat;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pwr_key_l>;
+
+		power {
+			label = "GPIO Key Power";
+			debounce-interval = <100>;
+			gpios = <&gpio0 RK_PA5 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_POWER>;
+			wakeup-source;
+		};
+	};
+
 	leds {
 		compatible = "gpio-leds";
 		pinctrl-names = "default";
@@ -515,6 +545,12 @@ &pmu_io_domains {
 };
 
 &pinctrl {
+	buttons {
+		pwr_key_l: pwr-key-l {
+			rockchip,pins = <0 RK_PA5 RK_FUNC_GPIO &pcfg_pull_up>;
+		};
+	};
+
 	lcd-panel {
 		lcd_panel_reset: lcd-panel-reset {
 			rockchip,pins = <4 RK_PD6 RK_FUNC_GPIO &pcfg_pull_up>;