From 6a9e7318f288d7f01b0d178d41566406c0843d38 Mon Sep 17 00:00:00 2001
From: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Date: Sun, 14 Sep 2014 01:33:15 +0900
Subject: [PATCH] ARM: dts: Add support Atmel touchpad for exynos5420-peach-pit

The Peach Pit board has an Atmel maXTouch trackpad device.
Add the needed Device Tree nodes to support it.

This Device Tree change is based on the Chrome OS 3.8 tree
but adapted to use the mainline Atmel maXTouch DT binding.

Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
---
 arch/arm/boot/dts/exynos5420-peach-pit.dts | 29 ++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/arch/arm/boot/dts/exynos5420-peach-pit.dts b/arch/arm/boot/dts/exynos5420-peach-pit.dts
index f24770937ec0..22c8224f3107 100644
--- a/arch/arm/boot/dts/exynos5420-peach-pit.dts
+++ b/arch/arm/boot/dts/exynos5420-peach-pit.dts
@@ -507,6 +507,28 @@
 	};
 };
 
+&hsi2c_8 {
+	status = "okay";
+	clock-frequency = <333000>;
+
+	/* Atmel mXT336S */
+	trackpad@4b {
+		compatible = "atmel,maxtouch";
+		reg = <0x4b>;
+		interrupt-parent = <&gpx1>;
+		interrupts = <1 IRQ_TYPE_EDGE_FALLING>;
+		wakeup-source;
+		pinctrl-names = "default";
+		pinctrl-0 = <&trackpad_irq>;
+		linux,gpio-keymap = <KEY_RESERVED
+				     KEY_RESERVED
+				     KEY_RESERVED	/* GPIO0 */
+				     KEY_RESERVED	/* GPIO1 */
+				     KEY_RESERVED	/* GPIO2 */
+				     BTN_LEFT>;		/* GPIO3 */
+	};
+};
+
 &hsi2c_9 {
 	status = "okay";
 	clock-frequency = <400000>;
@@ -591,6 +613,13 @@
 		samsung,pin-drv = <0>;
 	};
 
+	trackpad_irq: trackpad-irq {
+		samsung,pins = "gpx1-1";
+		samsung,pin-function = <0xf>;
+		samsung,pin-pud = <0>;
+		samsung,pin-drv = <0>;
+	};
+
 	power_key_irq: power-key-irq {
 		samsung,pins = "gpx1-2";
 		samsung,pin-function = <0>;
-- 
2.20.1