From 1c36317df0d7ddc0ed40a70858700ad021a833ba Mon Sep 17 00:00:00 2001
From: Zain Wang <wzz@rock-chips.com>
Date: Tue, 30 Oct 2018 15:43:47 +0800
Subject: [PATCH] arm64: dts: rockchip: Add recovery key support for rk3328-evb

Define recovery key for uboot if uboot used kernel dtb

Change-Id: Iad91e1ba5109c82512d125981f0a26aa6cf1ddc2
Signed-off-by: Zain Wang <wzz@rock-chips.com>
---
 arch/arm64/boot/dts/rockchip/rk3328-evb.dts | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3328-evb.dts b/arch/arm64/boot/dts/rockchip/rk3328-evb.dts
index ab0590888872..a1b22a86ffce 100644
--- a/arch/arm64/boot/dts/rockchip/rk3328-evb.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3328-evb.dts
@@ -64,6 +64,20 @@
 		status = "okay";
 	};
 
+	adc-keys {
+		compatible = "adc-keys";
+		io-channels = <&saradc 0>;
+		io-channel-names = "buttons";
+		poll-interval = <100>;
+		keyup-threshold-microvolt = <1800000>;
+
+		vol-up-key {
+			linux,code = <KEY_VOLUMEUP>;
+			label = "volume up";
+			press-threshold-microvolt = <18000>;
+		};
+	};
+
 	gmac_clkin: external-gmac-clock {
 		compatible = "fixed-clock";
 		clock-frequency = <125000000>;
@@ -545,6 +559,11 @@
 	status = "okay";
 };
 
+&saradc {
+	status = "okay";
+	vref-supply = <&vdd_18>;
+};
+
 &sdio {
 	bus-width = <4>;
 	cap-sd-highspeed;