ARM: dts: imx6dl-colibri: Add support for Toradex Iris carrier boards

Add support for Toradex Iris, small form-factor Pico-ITX Colibri Arm
Computer Module family Carrier Board.

Additional details available at
https://www.toradex.com/products/carrier-board/iris-carrier-board

Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/Makefile

@@ -459,6 +459,8 @@ dtb-$(CONFIG_SOC_IMX6Q) += \
 	imx6dl-aristainetos2_4.dtb \
 	imx6dl-aristainetos2_7.dtb \
 	imx6dl-colibri-eval-v3.dtb \
+	imx6dl-colibri-iris.dtb \
+	imx6dl-colibri-iris-v2.dtb \
 	imx6dl-cubox-i.dtb \
 	imx6dl-cubox-i-emmc-som-v15.dtb \
 	imx6dl-cubox-i-som-v15.dtb \

arch/arm/boot/dts/imx6dl-colibri-iris-v2.dts

@@ -0,0 +1,46 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/*
+ * Copyright 2022 Toradex
+ */
+
+/dts-v1/;
+
+#include "imx6dl-colibri-iris.dts"
+
+/ {
+	model = "Toradex Colibri iMX6DL/S on Colibri Iris V2 Board";
+	compatible = "toradex,colibri_imx6dl-iris-v2", "toradex,colibri_imx6dl",
+		     "fsl,imx6dl";
+
+	reg_3v3_vmmc: regulator-3v3-vmmc {
+		compatible = "regulator-fixed";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_enable_3v3_vmmc>;
+		regulator-name = "3v3_vmmc";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		gpio = <&gpio2 11 GPIO_ACTIVE_HIGH>;
+		startup-delay-us = <100>;
+		enable-active-high;
+	};
+};
+
+&iomuxc {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_gpio_iris	&pinctrl_usbh_oc_1 &pinctrl_usbc_id_1>;
+
+	pinctrl_enable_3v3_vmmc: enable3v3vmmcgrp {
+		fsl,pins = <
+			MX6QDL_PAD_SD4_DAT3__GPIO2_IO11	0x1b0b0
+		>;
+	};
+};
+
+/* Colibri MMC */
+&usdhc1 {
+	cap-power-off-card;
+	/* uncomment the following to enable SD card UHS mode if you have a V1.1 module */
+	/* /delete-property/ no-1-8-v; */
+	vmmc-supply = <&reg_3v3_vmmc>;
+	status = "okay";
+};

arch/arm/boot/dts/imx6dl-colibri-iris.dts

@@ -0,0 +1,152 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/*
+ * Copyright 2022 Toradex
+ */
+
+/dts-v1/;
+
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+#include "imx6dl.dtsi"
+#include "imx6qdl-colibri.dtsi"
+
+/ {
+	model = "Toradex Colibri iMX6DL/S on Colibri Iris Board";
+	compatible = "toradex,colibri_imx6dl-iris", "toradex,colibri_imx6dl",
+		     "fsl,imx6dl";
+
+	aliases {
+		i2c0 = &i2c2;
+		i2c1 = &i2c3;
+	};
+
+	aliases {
+		rtc0 = &rtc_i2c;
+		rtc1 = &snvs_rtc;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+};
+
+/* Colibri SSP */
+&ecspi4 {
+	status = "okay";
+};
+
+&gpio2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_uart1_forceoff &pinctrl_uart23_forceoff>;
+
+	/*
+	 * uart-a-on-x13-enable turns the UART transceiver for UART_A on. If one
+	 * wants to turn the transceiver off, that property has to be deleted
+	 * and the gpio handled in userspace.
+	 * The same applies to uart-b-c-on-x14-enable where the UART_B and
+	 * UART_C transceiver is turned on.
+	 */
+	uart-a-on-x13-enable-hog {
+		gpio-hog;
+		gpios = <4 GPIO_ACTIVE_HIGH>; /* SODIMM 102 */
+		output-high;
+	};
+
+	uart-b-c-on-x14-enable-hog {
+		gpio-hog;
+		gpios = <8 GPIO_ACTIVE_HIGH>; /* SODIMM 104 */
+		output-high;
+	};
+};
+
+/*
+ * Colibri I2C: I2C3_SDA/SCL on SODIMM 194/196 (e.g. RTC on carrier board)
+ */
+&i2c3 {
+	status = "okay";
+
+	rtc_i2c: rtc@68 {
+		compatible = "st,m41t0";
+		reg = <0x68>;
+	};
+};
+
+&iomuxc {
+	pinctrl-names = "default";
+	pinctrl-0 = <
+		&pinctrl_gpio_iris
+		&pinctrl_usbh_oc_1
+		&pinctrl_usbc_id_1
+	>;
+
+	pinctrl_gpio_iris: gpioirisgrp {
+		fsl,pins = <
+			MX6QDL_PAD_EIM_A17__GPIO2_IO21	0x1b0b0
+			MX6QDL_PAD_EIM_A18__GPIO2_IO20	0x1b0b0
+			MX6QDL_PAD_EIM_A19__GPIO2_IO19	0x1b0b0
+			MX6QDL_PAD_EIM_A20__GPIO2_IO18	0x1b0b0
+			MX6QDL_PAD_EIM_A23__GPIO6_IO06	0x1b0b0
+			MX6QDL_PAD_EIM_D27__GPIO3_IO27	0x1b0b0
+			MX6QDL_PAD_NANDF_D3__GPIO2_IO03	0x1b0b0
+			MX6QDL_PAD_SD2_DAT0__GPIO1_IO15	0x1b0b0
+		>;
+	};
+
+	pinctrl_uart1_forceoff: uart1forceoffgrp {
+		fsl,pins = <
+			MX6QDL_PAD_NANDF_D4__GPIO2_IO04 0x1b0b0
+		>;
+	};
+
+	pinctrl_uart23_forceoff: uart23forceoffgrp {
+		fsl,pins = <
+			MX6QDL_PAD_SD4_DAT0__GPIO2_IO08 0x1b0b0
+		>;
+	};
+};
+
+&pwm1 {
+	status = "okay";
+};
+
+&pwm2 {
+	status = "okay";
+};
+
+&pwm3 {
+	status = "okay";
+};
+
+&pwm4 {
+	status = "okay";
+};
+
+&reg_usb_host_vbus {
+	status = "okay";
+};
+
+&uart1 {
+	status = "okay";
+};
+
+&uart2 {
+	status = "okay";
+};
+
+&uart3 {
+	status = "okay";
+};
+
+&usbh1 {
+	vbus-supply = <&reg_usb_host_vbus>;
+	status = "okay";
+};
+
+&usbotg {
+	status = "okay";
+};
+
+/* Colibri MMC */
+&usdhc1 {
+	status = "okay";
+};