From 24ffaa23cec6e12663633271056c3ba49c291802 Mon Sep 17 00:00:00 2001
From: Philippe Schenker <philippe.schenker@toradex.com>
Date: Tue, 27 Aug 2019 13:18:28 +0000
Subject: [PATCH] ARM: dts: imx6-apalis: Add touchscreens used on Toradex eval
 boards

This commit adds the touchscreen from Toradex so one can enable it.
It is disabled by default because the pins are also used for PWM<B>,
PWM<C>, aka pwm2, pwm3 which is the standard use for colibri boards.

Signed-off-by: Philippe Schenker <philippe.schenker@toradex.com>
Acked-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
---
 arch/arm/boot/dts/imx6dl-colibri-eval-v3.dts  | 31 +++++++++++++++++++
 arch/arm/boot/dts/imx6q-apalis-eval.dts       | 13 ++++++++
 arch/arm/boot/dts/imx6q-apalis-ixora-v1.1.dts | 13 ++++++++
 arch/arm/boot/dts/imx6q-apalis-ixora.dts      | 13 ++++++++
 4 files changed, 70 insertions(+)

diff --git a/arch/arm/boot/dts/imx6dl-colibri-eval-v3.dts b/arch/arm/boot/dts/imx6dl-colibri-eval-v3.dts
index 9a5d6c94cca4..5e9d844d78f2 100644
--- a/arch/arm/boot/dts/imx6dl-colibri-eval-v3.dts
+++ b/arch/arm/boot/dts/imx6dl-colibri-eval-v3.dts
@@ -168,6 +168,21 @@ &hdmi {
 &i2c3 {
 	status = "okay";
 
+	/*
+	 * Touchscreen is using SODIMM 28/30, also used for PWM<B>, PWM<C>,
+	 * aka pwm2, pwm3. so if you enable touchscreen, disable the pwms
+	 */
+	touchscreen@4a {
+		compatible = "atmel,maxtouch";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_pcap_1>;
+		reg = <0x4a>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <9 IRQ_TYPE_EDGE_FALLING>;		/* SODIMM 28 */
+		reset-gpios = <&gpio2 10 GPIO_ACTIVE_HIGH>;	/* SODIMM 30 */
+		status = "disabled";
+	};
+
 	/* M41T0M6 real time clock on carrier board */
 	rtc_i2c: rtc@68 {
 		compatible = "st,m41t0";
@@ -175,6 +190,22 @@ rtc_i2c: rtc@68 {
 	};
 };
 
+&iomuxc {
+	pinctrl_pcap_1: pcap1grp {
+		fsl,pins = <
+			MX6QDL_PAD_GPIO_9__GPIO1_IO09	0x1b0b0 /* SODIMM 28 */
+			MX6QDL_PAD_SD4_DAT2__GPIO2_IO10	0x1b0b0 /* SODIMM 30 */
+		>;
+	};
+
+	pinctrl_mxt_ts: mxttsgrp {
+		fsl,pins = <
+			MX6QDL_PAD_EIM_CS1__GPIO2_IO24	0x130b0 /* SODIMM 107 */
+			MX6QDL_PAD_SD2_DAT1__GPIO1_IO14	0x130b0 /* SODIMM 106 */
+		>;
+	};
+};
+
 &ipu1_di0_disp0 {
 	remote-endpoint = <&lcd_display_in>;
 };
diff --git a/arch/arm/boot/dts/imx6q-apalis-eval.dts b/arch/arm/boot/dts/imx6q-apalis-eval.dts
index 0edd3043d9c1..4665e15b196d 100644
--- a/arch/arm/boot/dts/imx6q-apalis-eval.dts
+++ b/arch/arm/boot/dts/imx6q-apalis-eval.dts
@@ -167,6 +167,19 @@ &hdmi {
 &i2c1 {
 	status = "okay";
 
+	/*
+	 * Touchscreen is using SODIMM 28/30, also used for PWM<B>, PWM<C>,
+	 * aka pwm2, pwm3. so if you enable touchscreen, disable the pwms
+	 */
+	touchscreen@4a {
+		compatible = "atmel,maxtouch";
+		reg = <0x4a>;
+		interrupt-parent = <&gpio6>;
+		interrupts = <10 IRQ_TYPE_EDGE_FALLING>;
+		reset-gpios = <&gpio6 9 GPIO_ACTIVE_HIGH>; /* SODIMM 13 */
+		status = "disabled";
+	};
+
 	pcie-switch@58 {
 		compatible = "plx,pex8605";
 		reg = <0x58>;
diff --git a/arch/arm/boot/dts/imx6q-apalis-ixora-v1.1.dts b/arch/arm/boot/dts/imx6q-apalis-ixora-v1.1.dts
index b94bb687be6b..a3fa04a97d81 100644
--- a/arch/arm/boot/dts/imx6q-apalis-ixora-v1.1.dts
+++ b/arch/arm/boot/dts/imx6q-apalis-ixora-v1.1.dts
@@ -172,6 +172,19 @@ &hdmi {
 &i2c1 {
 	status = "okay";
 
+	/*
+	 * Touchscreen is using SODIMM 28/30, also used for PWM<B>, PWM<C>,
+	 * aka pwm2, pwm3. so if you enable touchscreen, disable the pwms
+	 */
+	touchscreen@4a {
+		compatible = "atmel,maxtouch";
+		reg = <0x4a>;
+		interrupt-parent = <&gpio6>;
+		interrupts = <10 IRQ_TYPE_EDGE_FALLING>;
+		reset-gpios = <&gpio6 9 GPIO_ACTIVE_HIGH>; /* SODIMM 13 */
+		status = "disabled";
+	};
+
 	/* M41T0M6 real time clock on carrier board */
 	rtc_i2c: rtc@68 {
 		compatible = "st,m41t0";
diff --git a/arch/arm/boot/dts/imx6q-apalis-ixora.dts b/arch/arm/boot/dts/imx6q-apalis-ixora.dts
index 302fd6adc8a7..5ba49d0f4880 100644
--- a/arch/arm/boot/dts/imx6q-apalis-ixora.dts
+++ b/arch/arm/boot/dts/imx6q-apalis-ixora.dts
@@ -171,6 +171,19 @@ &hdmi {
 &i2c1 {
 	status = "okay";
 
+	/*
+	 * Touchscreen is using SODIMM 28/30, also used for PWM<B>, PWM<C>,
+	 * aka pwm2, pwm3. so if you enable touchscreen, disable the pwms
+	 */
+	touchscreen@4a {
+		compatible = "atmel,maxtouch";
+		reg = <0x4a>;
+		interrupt-parent = <&gpio6>;
+		interrupts = <10 IRQ_TYPE_EDGE_FALLING>;
+		reset-gpios = <&gpio6 9 GPIO_ACTIVE_HIGH>; /* SODIMM 13 */
+		status = "disabled";
+	};
+
 	eeprom@50 {
 		compatible = "atmel,24c02";
 		reg = <0x50>;
-- 
2.45.2