ARM: dts: imx6q: Add support for the DHCOM iMX6 SoM and PDK2

Add support for the DH i.MX6 Quad based SoM and a PDK2 evaluation board.
The evaluation board features three serial ports, USB OTG, USB host with
an USB hub, Fast or Gigabit ethernet, eMMC, uSD, SD, mSATA, analog audio,
PCIe and HDMI video output.

All of the aforementioned features are supported by this patch.
Signed-off-by: Marek Vasut <marex@denx.de>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/Makefile

@@ -440,6 +440,7 @@ dtb-$(CONFIG_SOC_IMX6Q) += \
 	imx6q-cubox-i-emmc-som-v15.dtb \
 	imx6q-cubox-i-som-v15.dtb \
 	imx6q-dfi-fs700-m60.dtb \
+	imx6q-dhcom-pdk2.dtb \
 	imx6q-display5-tianma-tm070-1280x768.dtb \
 	imx6q-dmo-edmqmx6.dtb \
 	imx6q-dms-ba16.dtb \

arch/arm/boot/dts/imx6q-dhcom-pdk2.dts

+// SPDX-License-Identifier: (GPL-2.0+)
+/*
+ * Copyright (C) 2015 DH electronics GmbH
+ * Copyright (C) 2018 Marek Vasut <marex@denx.de>
+ */
+
+/dts-v1/;
+
+#include "imx6q-dhcom-som.dtsi"
+
+/ {
+	model = "Freescale i.MX6 Quad DHCOM Premium Developer Kit (2)";
+	compatible = "dh,imx6q-dhcom-pdk2", "dh,imx6q-dhcom-som", "fsl,imx6q";
+
+	chosen {
+		stdout-path = &uart1;
+	};
+
+	clk_ext_audio_codec: clock-codec {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <24000000>;
+	};
+
+	sound {
+		compatible = "fsl,imx-audio-sgtl5000";
+		model = "imx-sgtl5000";
+		ssi-controller = <&ssi1>;
+		audio-codec = <&sgtl5000>;
+		audio-routing =
+			"MIC_IN", "Mic Jack",
+			"Mic Jack", "Mic Bias",
+			"LINE_IN", "Line In Jack",
+			"Headphone Jack", "HP_OUT";
+		mux-int-port = <1>;
+		mux-ext-port = <3>;
+	};
+};
+
+&audmux {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_audmux_ext>;
+	status = "okay";
+};
+
+&hdmi {
+	ddc-i2c-bus = <&i2c2>;
+	status = "okay";
+};
+
+&i2c2 {
+	sgtl5000: codec@a {
+		compatible = "fsl,sgtl5000";
+		reg = <0x0a>;
+		#sound-dai-cells = <0>;
+		clocks = <&clk_ext_audio_codec>;
+		VDDA-supply = <&reg_3p3v>;
+		VDDIO-supply = <&reg_3p3v>;
+	};
+};
+
+&iomuxc {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_hog_base &pinctrl_hog>;
+
+	pinctrl_hog: hog-grp {
+		fsl,pins = <
+			MX6QDL_PAD_GPIO_2__GPIO1_IO02		0x400120b0
+			MX6QDL_PAD_GPIO_4__GPIO1_IO04		0x400120b0
+			MX6QDL_PAD_GPIO_5__GPIO1_IO05		0x400120b0
+			MX6QDL_PAD_CSI0_DAT17__GPIO6_IO03	0x400120b0
+			MX6QDL_PAD_GPIO_19__GPIO4_IO05		0x120b0
+			MX6QDL_PAD_DI0_PIN4__GPIO4_IO20		0x400120b0
+			MX6QDL_PAD_EIM_D27__GPIO3_IO27		0x120b0
+			MX6QDL_PAD_KEY_ROW0__GPIO4_IO07		0x120b0
+			MX6QDL_PAD_KEY_COL1__GPIO4_IO08		0x400120b0
+			MX6QDL_PAD_NANDF_CS1__GPIO6_IO14	0x400120b0
+			MX6QDL_PAD_NANDF_CS2__GPIO6_IO15	0x400120b0
+			MX6QDL_PAD_KEY_ROW1__GPIO4_IO09		0x400120b0
+			MX6QDL_PAD_SD3_DAT5__GPIO7_IO00		0x400120b0
+			MX6QDL_PAD_SD3_DAT4__GPIO7_IO01		0x400120b0
+			MX6QDL_PAD_CSI0_VSYNC__GPIO5_IO21	0x400120b0
+			MX6QDL_PAD_GPIO_18__GPIO7_IO13		0x400120b0
+			MX6QDL_PAD_SD1_CMD__GPIO1_IO18		0x400120b0
+			MX6QDL_PAD_SD1_DAT0__GPIO1_IO16		0x400120b0
+			MX6QDL_PAD_SD1_DAT1__GPIO1_IO17		0x400120b0
+			MX6QDL_PAD_SD1_DAT2__GPIO1_IO19		0x400120b0
+			MX6QDL_PAD_SD1_CLK__GPIO1_IO20		0x400120b0
+			MX6QDL_PAD_CSI0_PIXCLK__GPIO5_IO18	0x400120b0
+			MX6QDL_PAD_CSI0_MCLK__GPIO5_IO19	0x400120b0
+			MX6QDL_PAD_KEY_COL0__GPIO4_IO06		0x400120b0
+		>;
+	};
+
+	pinctrl_audmux_ext: audmux-ext-grp {
+		fsl,pins = <
+			MX6QDL_PAD_CSI0_DAT7__AUD3_RXD		0x130b0
+			MX6QDL_PAD_CSI0_DAT4__AUD3_TXC		0x130b0
+			MX6QDL_PAD_CSI0_DAT5__AUD3_TXD		0x110b0
+			MX6QDL_PAD_CSI0_DAT6__AUD3_TXFS		0x130b0
+		>;
+	};
+
+	pinctrl_enet_1G: enet-1G-grp {
+		fsl,pins = <
+			MX6QDL_PAD_ENET_MDIO__ENET_MDIO		0x100b0
+			MX6QDL_PAD_ENET_MDC__ENET_MDC		0x100b0
+			MX6QDL_PAD_RGMII_TXC__RGMII_TXC		0x100b0
+			MX6QDL_PAD_RGMII_TD0__RGMII_TD0		0x100b0
+			MX6QDL_PAD_RGMII_TD1__RGMII_TD1		0x100b0
+			MX6QDL_PAD_RGMII_TD2__RGMII_TD2		0x100b0
+			MX6QDL_PAD_RGMII_TD3__RGMII_TD3		0x100b0
+			MX6QDL_PAD_RGMII_TX_CTL__RGMII_TX_CTL	0x100b0
+			MX6QDL_PAD_ENET_REF_CLK__ENET_TX_CLK	0x100b0
+			MX6QDL_PAD_RGMII_RXC__RGMII_RXC		0x1b0b0
+			MX6QDL_PAD_RGMII_RD0__RGMII_RD0		0x1b0b0
+			MX6QDL_PAD_RGMII_RD1__RGMII_RD1		0x1b0b0
+			MX6QDL_PAD_RGMII_RD2__RGMII_RD2		0x1b0b0
+			MX6QDL_PAD_RGMII_RD3__RGMII_RD3		0x1b0b0
+			MX6QDL_PAD_RGMII_RX_CTL__RGMII_RX_CTL	0x1b0b0
+			MX6QDL_PAD_EIM_D29__GPIO3_IO29		0x000b0
+			MX6QDL_PAD_GPIO_0__GPIO1_IO00		0x000b1
+			MX6QDL_PAD_EIM_D26__GPIO3_IO26		0x000b1
+		>;
+	};
+
+	pinctrl_pcie: pcie-grp {
+		fsl,pins = <
+			MX6QDL_PAD_CSI0_DATA_EN__GPIO5_IO20	0x1b0b1
+		>;
+	};
+};
+
+&pcie {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_pcie>;
+	reset-gpio = <&gpio6 14 GPIO_ACTIVE_LOW>;
+	status = "okay";
+};
+
+&ssi1 {
+	status = "okay";
+};
+
+&sata {
+	status = "okay";
+};
+
+&usdhc3 {
+	status = "okay";
+};