From 50cf0c088c46f91dfa2e50eef1b00a466e75cb36 Mon Sep 17 00:00:00 2001
From: Ziyuan Xu <xzy.xu@rock-chips.com>
Date: Tue, 9 Oct 2018 09:15:47 +0800
Subject: [PATCH] arm64: dts: rockchip: rk1808-evb: support adc keys

Change-Id: I602270b2fe4a32fa2ee3930eb411aef68167f9b9
Signed-off-by: Ziyuan Xu <xzy.xu@rock-chips.com>
---
 arch/arm64/boot/dts/rockchip/rk1808-evb.dtsi | 22 ++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk1808-evb.dtsi b/arch/arm64/boot/dts/rockchip/rk1808-evb.dtsi
index e5ef7d57db26..ff7f101ac519 100644
--- a/arch/arm64/boot/dts/rockchip/rk1808-evb.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk1808-evb.dtsi
@@ -3,6 +3,7 @@
 
 #include <dt-bindings/display/media-bus-format.h>
 #include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
 #include <dt-bindings/pinctrl/rockchip.h>
 #include <dt-bindings/sensor-dev.h>
 #include "rk1808.dtsi"
@@ -11,6 +12,27 @@
 	model = "Rockchip RK1808 EVB";
 	compatible = "rockchip,rk1808-evb", "rockchip,rk1808";
 
+	adc-keys {
+		compatible = "adc-keys";
+		autorepeat;
+		io-channels = <&saradc 2>;
+		io-channel-names = "buttons";
+		keyup-threshold-microvolt = <1800000>;
+		poll-interval = <100>;
+
+		vol-down-key {
+			linux,code = <KEY_VOLUMEDOWN>;
+			label = "volume down";
+			press-threshold-microvolt = <300000>;
+		};
+
+		vol-up-key {
+			linux,code = <KEY_VOLUMEUP>;
+			label = "volume up";
+			press-threshold-microvolt = <18000>;
+		};
+	};
+
 	backlight: backlight {
 		compatible = "pwm-backlight";
 		pwms = <&pwm1 0 25000 0>;