arm64: dts: imx8mm: Add support for emtrion emCON-MX8M Mini

This patch adds support for the emtrion GmbH emCON-MX8M Mini modules.
They are available with NXP i.MX 8M Mini equipped with 2 or 4 GB Memory.

The devicetree imx8mm-emcon.dtsi is the common part providing all
module components and the basic support for the SoC. The support for the
avari baseboard in the developer-kit configuration is provided by the
emcon-avari dts files.
Signed-off-by: Reinhold Mueller <reinhold.mueller@emtrion.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/Makefile

@@ -50,8 +50,9 @@ dtb-$(CONFIG_ARCH_LAYERSCAPE) += fsl-lx2160a-rdb.dtb
 dtb-$(CONFIG_ARCH_LAYERSCAPE) += fsl-lx2162a-qds.dtb
 
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-beacon-kit.dtb
-dtb-$(CONFIG_ARCH_MXC) += imx8mm-evk.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-ddr4-evk.dtb
+dtb-$(CONFIG_ARCH_MXC) += imx8mm-emcon-avari.dtb
+dtb-$(CONFIG_ARCH_MXC) += imx8mm-evk.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-icore-mx8mm-ctouch2.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-icore-mx8mm-edimm2.2.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-kontron-n801x-s.dtb

arch/arm64/boot/dts/freescale/imx8mm-emcon-avari.dts

+// SPDX-License-Identifier: (GPL-2.0 or MIT)
+//
+// Copyright (c) 2021 emtrion GmbH
+// Author: Frank Erdrich <frank.erdrich@emtrion.com>
+//
+
+/dts-v1/;
+
+#include "imx8mm-emcon.dtsi"
+#include "imx8mm-emcon-avari.dtsi"
+
+/ {
+	model = "emtrion SoM emCON-MX8M mini on Avari";
+	compatible = "emtrion,emcon-mx8mm-avari", "fsl,imx8mm";
+};
+
+&lvds_backlight {
+	status = "okay";
+};
+
+&pwm1 {
+	status = "okay";
+};

arch/arm64/boot/dts/freescale/imx8mm-emcon-avari.dtsi

+// SPDX-License-Identifier: (GPL-2.0 or MIT)
+//
+// Copyright (C) 2021 emtrion GmbH
+// Author: Frank Erdrich <frank.erdrich@emtrion.com>
+//
+
+/ {
+	aliases {
+		boardid = &boardID;
+		mmc0 = &usdhc1;
+		mmc1 = &usdhc2;
+	};
+
+	chosen {
+		stdout-path = &uart1;
+	};
+
+	reg_wall_5p0: regulator-wall5p0 {
+		compatible = "regulator-fixed";
+		regulator-name = "Main-Supply";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-always-on;
+		regulator-boot-on;
+	};
+
+	reg_base3p3: regulator-base3p3 {
+		compatible = "regulator-fixed";
+		vin-supply = <&reg_wall_5p0>;
+		regulator-name = "3V3-avari";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-always-on;
+		regulator-boot-on;
+	};
+
+	reg_base1p5: regulator-base1p5 {
+		compatible = "regulator-fixed";
+		vin-supply = <&reg_base3p3>;
+		regulator-name = "1V5-avari";
+		regulator-min-microvolt = <1500000>;
+		regulator-max-microvolt = <1500000>;
+		regulator-always-on;
+		regulator-boot-on;
+	};
+
+	reg_usb_otg: regulator-otgvbus {
+		compatible = "regulator-fixed";
+		vin-supply = <&reg_wall_5p0>;
+		regulator-name = "OTG_VBUS";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		gpio = <&gpio1 8 GPIO_ACTIVE_LOW>;
+		regulator-always-on;
+	};
+
+	clk_codec: clock-codec {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <12000000>;
+	};
+
+	sound {
+		compatible = "simple-audio-card";
+		simple-audio-card,name = "SGTL5000-Card";
+		simple-audio-card,format = "i2s";
+		simple-audio-card,bitclock-master = <&codec_dai>;
+		simple-audio-card,frame-master = <&codec_dai>;
+		simple-audio-card,widgets = "Headphone", "Headphone Jack";
+		simple-audio-card,routing = "Headphone Jack", "HP_OUT";
+
+		cpu_dai: simple-audio-card,cpu {
+			sound-dai = <&sai2>;
+		};
+
+		codec_dai: simple-audio-card,codec {
+			sound-dai = <&sgtl5000>;
+		};
+	};
+};
+
+&ecspi1 {
+	status = "okay";
+};
+
+&i2c2 {
+	status = "okay";
+};
+
+&i2c1 {
+	clock-frequency = <100000>;
+	status = "okay";
+
+	sgtl5000: audio-codec@a {
+		compatible = "fsl,sgtl5000";
+		reg = <0x0a>;
+		#sound-dai-cells = <0>;
+		clocks = <&clk_codec>;
+		VDDA-supply = <&reg_base3p3>;
+		VDDIO-supply = <&reg_base3p3>;
+	};
+
+	boardID: gpio@3a {
+		compatible = "nxp,pca8574";
+		reg = <0x3a>;
+		gpio-controller;
+		#gpio-cells = <1>;
+	};
+};
+
+&sai2 {
+	status = "okay";
+};
+
+&uart2 {
+	uart-has-rtscts;
+	status = "okay";
+};
+
+&uart3 {
+	status = "okay";
+};
+
+&uart4 {
+	status = "okay";
+};
+
+&usbotg1 {
+	status = "okay";
+};
+
+&usbotg2 {
+	dr_mode = "host";
+	status = "disabled";
+};
+
+&usdhc2 {
+	status = "okay";
+};