From c66526ad82f2d583f277eca2445b034d52259d7d Mon Sep 17 00:00:00 2001
From: Caesar Wang <wxt@rock-chips.com>
Date: Wed, 20 Feb 2019 14:20:05 +0800
Subject: [PATCH] arm64: dts: rockchip: add the adc_keys for
 rk3399-sapphire-excavator-linux.dts

There are four adc keys on rk3399 sapphire excavator board, these are
ESC/MENU/VOL+/VOL- key.

Change-Id: I7ddb6343fd22240739a198665d9ccf82d4529af9
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
---
 .../rk3399-sapphire-excavator-linux.dts       | 32 +++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-sapphire-excavator-linux.dts b/arch/arm64/boot/dts/rockchip/rk3399-sapphire-excavator-linux.dts
index 82f34590ce03..895ed9888462 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-sapphire-excavator-linux.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-sapphire-excavator-linux.dts
@@ -50,6 +50,38 @@
 	model = "Rockchip RK3399 Excavator Board (Linux Opensource)";
 	compatible = "rockchip,rk3399-excavator-linux", "rockchip,rk3399";
 
+	adc-keys {
+		compatible = "adc-keys";
+		io-channels = <&saradc 1>;
+		io-channel-names = "buttons";
+		poll-interval = <100>;
+		keyup-threshold-microvolt = <1800000>;
+
+		esc-key {
+			linux,code = <KEY_ESC>;
+			label = "esc";
+			press-threshold-microvolt = <1310000>;
+		};
+
+		menu-key {
+			linux,code = <KEY_MENU>;
+			label = "menu";
+			press-threshold-microvolt = <987000>;
+		};
+
+		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 = <17000>;
+		};
+	};
+
 	fiq_debugger: fiq-debugger {
 		compatible = "rockchip,fiq-debugger";
 		rockchip,serial-id = <2>;