linux-kernel - [PATCH v2 20/20] ARM: dts: imx6ull-colibri: Add touchscreen used with Eval Board

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Date:   Wed, 31 Jul 2019 12:38:35 +0000
From:   Philippe Schenker <philippe.schenker@...adex.com>
To:     Marcel Ziswiler <marcel.ziswiler@...adex.com>,
        Max Krummenacher <max.krummenacher@...adex.com>,
        "stefan@...er.ch" <stefan@...er.ch>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Michal Vokáč <michal.vokac@...ft.com>,
        Fabio Estevam <festevam@...il.com>
CC:     Philippe Schenker <philippe.schenker@...adex.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        NXP Linux Team <linux-imx@....com>,
        Sascha Hauer <s.hauer@...gutronix.de>
Subject: [PATCH v2 20/20] ARM: dts: imx6ull-colibri: Add touchscreen used with
 Eval Board

This adds the common touchscreen that is used with Toradex's
Eval Boards.

Signed-off-by: Philippe Schenker <philippe.schenker@...adex.com>

---

Changes in v2:
- Removed f0710a, that is downstream only
- Changed to generic node name
- Better comment

 .../arm/boot/dts/imx6ull-colibri-eval-v3.dtsi | 24 +++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/arch/arm/boot/dts/imx6ull-colibri-eval-v3.dtsi b/arch/arm/boot/dts/imx6ull-colibri-eval-v3.dtsi
index d3c4809f140e..78e74bfeca1b 100644
--- a/arch/arm/boot/dts/imx6ull-colibri-eval-v3.dtsi
+++ b/arch/arm/boot/dts/imx6ull-colibri-eval-v3.dtsi
@@ -112,6 +112,21 @@
 &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";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_gpiotouch>;
+		reg = <0x4a>;
+		interrupt-parent = <&gpio4>;
+		interrupts = <16 IRQ_TYPE_EDGE_FALLING>;	/* SODIMM 28 */
+		reset-gpios = <&gpio2 5 GPIO_ACTIVE_HIGH>;	/* SODIMM 30 */
+		status = "disabled";
+	};
+
 	/* M41T0M6 real time clock on carrier board */
 	m41t0m6: rtc@68 {
 		compatible = "st,m41t0";
@@ -188,3 +203,12 @@
 	sd-uhs-sdr104;
 	status = "okay";
 };
+
+&iomuxc {
+	pinctrl_gpiotouch: touchgpios {
+		fsl,pins = <
+			MX6UL_PAD_NAND_DQS__GPIO4_IO16		0x74
+			MX6UL_PAD_ENET1_TX_EN__GPIO2_IO05	0x14
+		>;
+	};
+};
-- 
2.22.0