[PATCH] ARM: dts: add touchkey nodes for midas

[Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>]

From: Simon Shields <simon@lineageos.org>

this patch adds the fixed VTOUCH_3.3V regulator and configures
the touchkey node + i2c-gpio node.

Signed-off-by: Simon Shields <simon@lineageos.org>
GNUtoo@cyberdimension.org: Fixed keycodes.
Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>
---
 arch/arm/boot/dts/exynos4412-galaxy-s3.dtsi |  4 +++
 arch/arm/boot/dts/exynos4412-midas.dtsi     | 29 +++++++++++++++++++++
 arch/arm/boot/dts/exynos4412-n710x.dts      |  4 +++
 3 files changed, 37 insertions(+)

diff --git a/arch/arm/boot/dts/exynos4412-galaxy-s3.dtsi b/arch/arm/boot/dts/exynos4412-galaxy-s3.dtsi
index ce87d2ff27aa..e71f103ab940 100644
--- a/arch/arm/boot/dts/exynos4412-galaxy-s3.dtsi
+++ b/arch/arm/boot/dts/exynos4412-galaxy-s3.dtsi
@@ -166,5 +166,9 @@
 &s5c73m3 {
 	standby-gpios = <&gpm0 1 GPIO_ACTIVE_LOW>;   /* ISP_STANDBY */
 	vdda-supply = <&ldo17_reg>;
+};
+
+&touchkey_reg {
+	gpio = <&gpm0 0 GPIO_ACTIVE_HIGH>;
 	status = "okay";
 };
diff --git a/arch/arm/boot/dts/exynos4412-midas.dtsi b/arch/arm/boot/dts/exynos4412-midas.dtsi
index 83be3a797411..797e8de40580 100644
--- a/arch/arm/boot/dts/exynos4412-midas.dtsi
+++ b/arch/arm/boot/dts/exynos4412-midas.dtsi
@@ -13,6 +13,7 @@
 #include "exynos4412.dtsi"
 #include "exynos4412-ppmu-common.dtsi"
 #include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
 #include <dt-bindings/interrupt-controller/irq.h>
 #include <dt-bindings/clock/maxim,max77686.h>
 #include <dt-bindings/pinctrl/samsung.h>
@@ -92,6 +93,15 @@
 		enable-active-high;
 	};
 
+	touchkey_reg: voltage-regulator-4 {
+		compatible = "regulator-fixed";
+		regulator-name = "VTOUCH_3.3V";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		enable-active-high;
+		status = "disabled";
+	};
+
 	gpio-keys {
 		compatible = "gpio-keys";
 		pinctrl-names = "default";
@@ -197,6 +207,25 @@
 		};
 	};
 
+	i2c_touchkey: i2c-gpio-4 {
+		compatible = "i2c-gpio";
+		sda-gpios = <&gpl0 2 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+		scl-gpios = <&gpl0 1 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+		i2c-gpio,delay-us = <2>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		touchkey@20 {
+			compatible = "cypress,midas-touchkey";
+			reg = <0x20>;
+			vdd-supply = <&touchkey_reg>;
+			vcc-supply = <&ldo5_reg>;
+			interrupt-parent = <&gpj0>;
+			interrupts = <3 IRQ_TYPE_EDGE_FALLING>;
+			linux,keycodes = <KEY_BACK KEY_MENU>;
+		};
+	};
+
 	i2c-mhl {
 		compatible = "i2c-gpio";
 		gpios = <&gpf0 4 GPIO_ACTIVE_HIGH>, <&gpf0 6 GPIO_ACTIVE_HIGH>;
diff --git a/arch/arm/boot/dts/exynos4412-n710x.dts b/arch/arm/boot/dts/exynos4412-n710x.dts
index fe2bfd76cc4e..6acb19d2bae2 100644
--- a/arch/arm/boot/dts/exynos4412-n710x.dts
+++ b/arch/arm/boot/dts/exynos4412-n710x.dts
@@ -71,5 +71,9 @@
 &s5c73m3 {
 	standby-gpios = <&gpm0 6 GPIO_ACTIVE_LOW>;   /* ISP_STANDBY */
 	vdda-supply = <&cam_vdda_reg>;
+};
+
+&touchkey_reg {
+	gpio = <&gpm0 5 GPIO_ACTIVE_HIGH>;
 	status = "okay";
 };
-- 
2.22.0


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