From 9c89311d7047bbc2412bf1cac50be3590abe4282 Mon Sep 17 00:00:00 2001
From: "charles.park" <charles.park@hardkernel.com>
Date: Mon, 31 Dec 2018 11:33:22 +0900
Subject: [PATCH] ODROID-N2: ODROID 3.5" Touchscreen driver added

Change-Id: I16f3db468278221dc1ba3ce76961e9bac2b4e548
---
 .../arm64/boot/dts/amlogic/s922d_odroidn2.dts | 62 ++++++++++++++++---
 1 file changed, 54 insertions(+), 8 deletions(-)

diff --git a/arch/arm64/boot/dts/amlogic/s922d_odroidn2.dts b/arch/arm64/boot/dts/amlogic/s922d_odroidn2.dts
index 2e454f27620d..6ed5c7106f85 100644
--- a/arch/arm64/boot/dts/amlogic/s922d_odroidn2.dts
+++ b/arch/arm64/boot/dts/amlogic/s922d_odroidn2.dts
@@ -487,30 +487,76 @@
 	clock-frequency = <400000>;
 };
 
+&i2c3 {
+	/* default i2c clock-frequency is 100Khz */
+	status = "okay";
+
+	/* Hardkernel I2C 3.5" Touchscreen */
+	/* drivers/input/sx8650.c */
+	sx865x: sx865x@49	{
+		status = "disabled";
+		compatible = "semtech,sx8650";
+		reg = <0x49>;
+		#clock-cells = <0>;
+
+		/* H/W Pin control setup */
+		/* ODROID-N2 */
+		gpio-pendown = <&gpio GPIOX_19 GPIO_ACTIVE_LOW>;
+		gpio-reset   = <&gpio GPIOA_12 GPIO_ACTIVE_LOW>;
+
+		/* platform data setup */
+		invert-x = <0>;
+		invert-y = <1>;
+		swap-xy = <1>;
+	};
+};
+
 &spicc0 {
 	status = "okay";
 
 	/*
-		40 Pin Header : MOSI(GPIOX.8->19 Pin), MISO(GPIOX.9->21 Pin),
-				SPI0_CLK(GPIOX.11->23 Pin)
-				SPI_CE0(GPIOX.2->22 Pin), SPI_CE1(GPIOX.10->24 Pin)
+	 40 Pin Header : MOSI(GPIOX.8->19 Pin), MISO(GPIOX.9->21 Pin),
+			 SPI0_CLK(GPIOX.11->23 Pin)
+			 SPI_CE0(GPIOX.2->22 Pin), SPI_CE1(GPIOX.10->24 Pin)
 	*/
 	pinctrl-names = "default";
 	pinctrl-0 = <&spicc0_pins_x>;
 
 	num_chipselect = <2>;
-	cs-gpios = <&gpio GPIOX_2 GPIO_ACTIVE_LOW>, <&gpio GPIOX_10 GPIO_ACTIVE_LOW>;
+
+	cs-gpios = <&gpio GPIOX_10 GPIO_ACTIVE_LOW>,
+		   <&gpio GPIOA_4 GPIO_ACTIVE_LOW>;
 
 	spidev@0 {
+		status = "okay";
+
 		compatible = "linux,spidev";
 		/* spi default max clock 100Mhz */
 		spi-max-frequency = <100000000>;
 		reg = <0>;
 	};
-	spidev@1 {
-		compatible = "linux,spidev";
-		/* spi default max clock 100Mhz */
-		spi-max-frequency = <100000000>;
+
+	/* SPI 3.2" Touch Screen Define */
+	ads7846@1 {
+		status = "disabled";
+
+		spi-max-frequency = <1000000>;
+
+		compatible = "ti,ads7846";
+
 		reg = <1>;
+
+		/* ODROID-N2 Touch interrupt gpio */
+		pendown-gpio = <&gpio GPIOX_3 GPIO_ACTIVE_HIGH>;
+
+		ti,swap-xy = <1>;
+		ti,x-min = /bits/ 16 <0>;
+		ti,x-max = /bits/ 16 <8000>;
+		ti,y-min = /bits/ 16 <0>;
+		ti,y-max = /bits/ 16 <4800>;
+		ti,x-plate-ohms = /bits/ 16 <40>;
+		ti,pressure-max = /bits/ 16 <255>;
+
+		linux,wakeup;
 	};
 };