From 764b5b5e704e1d991ad168a5e0c47d1dfc0018b1 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Michal=20Vok=C3=A1=C4=8D?= <michal.vokac@ysoft.com>
Date: Thu, 3 Oct 2019 08:12:56 +0200
Subject: [PATCH] ARM: dts: imx6dl-yapp4: Enable the MPR121 touchkey controller
 on Hydra
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Add the touch keyboard present on Hydra board. The controller
is connected only using I2C lines. The interrupt line is not
available hence we use the polling mode.

Signed-off-by: Michal Vokáč <michal.vokac@ysoft.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
---
 arch/arm/boot/dts/imx6dl-yapp4-common.dtsi | 13 +++++++++++++
 arch/arm/boot/dts/imx6dl-yapp4-hydra.dts   |  4 ++++
 2 files changed, 17 insertions(+)

diff --git a/arch/arm/boot/dts/imx6dl-yapp4-common.dtsi b/arch/arm/boot/dts/imx6dl-yapp4-common.dtsi
index e8d800fec6379..6507bfc0141a3 100644
--- a/arch/arm/boot/dts/imx6dl-yapp4-common.dtsi
+++ b/arch/arm/boot/dts/imx6dl-yapp4-common.dtsi
@@ -4,6 +4,7 @@
 
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/input/input.h>
 #include <dt-bindings/pwm/pwm.h>
 
 / {
@@ -330,6 +331,18 @@
 		vcc-supply = <&sw2_reg>;
 		status = "disabled";
 	};
+
+	touchkeys: keys@5a {
+		compatible = "fsl,mpr121-touchkey";
+		reg = <0x5a>;
+		vdd-supply = <&sw2_reg>;
+		autorepeat;
+		linux,keycodes = <KEY_1>, <KEY_2>, <KEY_3>, <KEY_4>, <KEY_5>,
+				<KEY_6>, <KEY_7>, <KEY_8>, <KEY_9>,
+				<KEY_BACKSPACE>, <KEY_0>, <KEY_ENTER>;
+		poll-interval = <50>;
+		status = "disabled";
+	};
 };
 
 &iomuxc {
diff --git a/arch/arm/boot/dts/imx6dl-yapp4-hydra.dts b/arch/arm/boot/dts/imx6dl-yapp4-hydra.dts
index f979270647501..84c275bfdd381 100644
--- a/arch/arm/boot/dts/imx6dl-yapp4-hydra.dts
+++ b/arch/arm/boot/dts/imx6dl-yapp4-hydra.dts
@@ -45,6 +45,10 @@
 	status = "okay";
 };
 
+&touchkeys {
+	status = "okay";
+};
+
 &usdhc3 {
 	status = "okay";
 };
-- 
2.30.2