ARM: dts: imx6ull-dhcom: Add DH electronics DHCOM i.MX6ULL SoM and PDK2 board

Add support for DH electronics DHCOM SoM and PDK2 rev. 400 carrier
board. This is an SoM with i.MX6ULL and an evaluation kit. The
baseboard provides Ethernet, UART, USB, CAN and optional display.
Signed-off-by: Christoph Niedermaier <cniedermaier@dh-electronics.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/Makefile

@@ -741,6 +741,7 @@ dtb-$(CONFIG_SOC_IMX6UL) += \
 	imx6ull-colibri-wifi-eval-v3.dtb \
 	imx6ull-colibri-wifi-iris.dtb \
 	imx6ull-colibri-wifi-iris-v2.dtb \
+	imx6ull-dhcom-pdk2.dtb \
 	imx6ull-jozacp.dtb \
 	imx6ull-kontron-bl.dtb \
 	imx6ull-myir-mys-6ulx-eval.dtb \

arch/arm/boot/dts/imx6ull-dhcom-pdk2.dts

+// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
+/*
+ * Copyright (C) 2023 DH electronics GmbH
+ *
+ * DHCOM iMX6ULL variant:
+ * DHCM-iMX6ULL-C080-R051-F0409-SPI-E2-CAN2-RTC-WBT-ADC-I-01D2
+ * DHCOR PCB number: 578-200 or newer
+ * DHCOM PCB number: 579-200 or newer
+ * PDK2 PCB number: 516-400 or newer
+ */
+/dts-v1/;
+
+#include "imx6ull-dhcom-som.dtsi"
+
+/ {
+	model = "DH electronics i.MX6ULL DHCOM on Premium Developer Kit (2)";
+	compatible = "dh,imx6ull-dhcom-pdk2", "dh,imx6ull-dhcom-som",
+		     "dh,imx6ull-dhcor-som", "fsl,imx6ull";
+
+	clk_ext_audio_codec: clock-codec {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <24000000>;
+	};
+
+	display_bl: display-bl {
+		compatible = "pwm-backlight";
+		brightness-levels = <0 16 22 30 40 55 75 102 138 188 255>;
+		default-brightness-level = <8>;
+		enable-gpios = <&gpio5 8 GPIO_ACTIVE_HIGH>; /* GPIO G */
+		power-supply = <&reg_panel_3v3>;
+		pwms = <&pwm1 0 50000 PWM_POLARITY_INVERTED>;
+	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+
+		button-0 {
+			gpios = <&gpio5 0 GPIO_ACTIVE_LOW>; /* GPIO A */
+			label = "TA1-GPIO-A";
+			linux,code = <KEY_A>;
+			wakeup-source;
+		};
+
+		button-1 {
+			gpios = <&gpio5 1 GPIO_ACTIVE_LOW>; /* GPIO B */
+			label = "TA2-GPIO-B";
+			linux,code = <KEY_B>;
+			wakeup-source;
+		};
+
+		button-2 {
+			gpios = <&gpio5 2 GPIO_ACTIVE_LOW>; /* GPIO C */
+			label = "TA3-GPIO-C";
+			linux,code = <KEY_C>;
+			wakeup-source;
+		};
+
+		button-3 {
+			gpios = <&gpio5 3 GPIO_ACTIVE_LOW>; /* GPIO D */
+			label = "TA4-GPIO-D";
+			linux,code = <KEY_D>;
+			wakeup-source;
+		};
+	};
+
+	led: led {
+		compatible = "gpio-leds";
+
+		/*
+		 * Disable PDK2 LED5, because GPIO E is
+		 * already used as touch interrupt.
+		 */
+		led-0 {
+			color = <LED_COLOR_ID_GREEN>;
+			default-state = "off";
+			function = LED_FUNCTION_INDICATOR;
+			function-enumerator = <5>; /* PDK2 LED5 */
+			gpios = <&gpio5 4 GPIO_ACTIVE_HIGH>; /* GPIO E */
+			status = "disabled";
+		};
+
+		led-1 {
+			color = <LED_COLOR_ID_GREEN>;
+			default-state = "off";
+			function = LED_FUNCTION_INDICATOR;
+			function-enumerator = <6>; /* PDK2 LED6 */
+			gpios = <&gpio5 7 GPIO_ACTIVE_HIGH>; /* GPIO F */
+		};
+
+		/*
+		 * Disable PDK2 LED7, because GPIO H is
+		 * already used for WiFi pin WL_REG_ON.
+		 */
+		led-2 {
+			color = <LED_COLOR_ID_GREEN>;
+			default-state = "off";
+			function = LED_FUNCTION_INDICATOR;
+			function-enumerator = <7>; /* PDK2 LED7 */
+			gpios = <&gpio5 9 GPIO_ACTIVE_HIGH>; /* GPIO H */
+			status = "disabled";
+		};
+
+		/*
+		 * Disable PDK2 LED8, because GPIO I is
+		 * already used for BT pin BT_REG_ON.
+		 */
+		led-3 {
+			color = <LED_COLOR_ID_GREEN>;
+			default-state = "off";
+			function = LED_FUNCTION_INDICATOR;
+			function-enumerator = <8>; /* PDK2 LED8 */
+			gpios = <&gpio1 18 GPIO_ACTIVE_HIGH>; /* GPIO I */
+			status = "disabled";
+		};
+	};
+
+	panel {
+		compatible = "edt,etm0700g0edh6";
+		backlight = <&display_bl>;
+		power-supply = <&reg_panel_3v3>;
+
+		port {
+			lcd_panel_in: endpoint {
+				remote-endpoint = <&lcd_display_out>;
+			};
+		};
+	};
+
+	/* Filtered supply voltage */
+	reg_pdk2_24v: regulator-pdk2-24v {
+		compatible = "regulator-fixed";
+		regulator-always-on;
+		regulator-max-microvolt = <24000000>;
+		regulator-min-microvolt = <24000000>;
+		regulator-name = "24V_PDK2";
+	};
+
+	/* PDK2 U35 */
+	reg_pdk2_3v3: regulator-pdk2-3v3 {
+		compatible = "regulator-fixed";
+		regulator-always-on;
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-name = "3V3_PDK2";
+		vin-supply = <&reg_pdk2_24v>;
+	};
+
+	/* 560-200 U1 */
+	reg_panel_3v3: regulator-panel-3v3 {
+		compatible = "regulator-fixed";
+		regulator-always-on;
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-name = "3V3_PANEL";
+		vin-supply = <&reg_pdk2_24v>;
+	};
+
+	sound {
+		compatible = "simple-audio-card";
+		simple-audio-card,bitclock-master = <&dailink_master>;
+		simple-audio-card,format = "i2s";
+		simple-audio-card,frame-master = <&dailink_master>;
+		simple-audio-card,name = "sgtl5000";
+		simple-audio-card,routing =
+			"MIC_IN", "Mic Jack",
+			"Mic Jack", "Mic Bias",
+			"LINE_IN", "Line In Jack",
+			"Headphone Jack", "HP_OUT";
+		simple-audio-card,widgets =
+			"Microphone", "Mic Jack",
+			"Line", "Line In Jack",
+			"Headphone", "Headphone Jack";
+
+		simple-audio-card,cpu {
+			sound-dai = <&sai2>;
+		};
+
+		dailink_master: simple-audio-card,codec {
+			clocks = <&clk_ext_audio_codec>;
+			sound-dai = <&sgtl5000>;
+		};
+	};
+};
+
+/* DHCOM I2C1 */
+&i2c2 {
+	sgtl5000: audio-codec@a {
+		compatible = "fsl,sgtl5000";
+		reg = <0x0a>;
+		#sound-dai-cells = <0>;
+		clocks = <&clk_ext_audio_codec>;
+		VDDA-supply = <&reg_pdk2_3v3>;
+		VDDIO-supply = <&reg_pdk2_3v3>;
+	};
+
+	touchscreen@38 {
+		compatible = "edt,edt-ft5406";
+		reg = <0x38>;
+		interrupt-parent = <&gpio5>;
+		interrupts = <4 IRQ_TYPE_EDGE_FALLING>; /* GPIO E */
+		power-supply = <&reg_panel_3v3>;
+	};
+};
+
+&lcdif {
+	status = "okay";
+
+	port {
+		lcd_display_out: endpoint {
+			remote-endpoint = <&lcd_panel_in>;
+		};
+	};
+};
+
+&pwm1 {
+	status = "okay";
+};
+
+&sai2 {
+	status = "okay";
+};

arch/arm/boot/dts/imx6ull-dhcor-som.dtsi

+// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
+/*
+ * Copyright (C) 2023 DH electronics GmbH
+ */
+
+#include <dt-bindings/clock/imx6ul-clock.h>
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/leds/common.h>
+#include <dt-bindings/pwm/pwm.h>
+#include "imx6ull.dtsi"
+
+/ {
+	memory@80000000 {
+		/* Appropriate memory size will be filled by U-Boot */
+		reg = <0x80000000 0>;
+		device_type = "memory";
+	};
+};
+
+&cpu0 {
+	/*
+	 * Due to the design as a solderable SOM, there are no capacitors
+	 * below the SoC, therefore higher voltages are required.
+	 */
+	operating-points = <
+		/* kHz	uV */
+		900000	1275000
+		792000	1250000 /* Voltage increased */
+		528000	1175000
+		396000	1025000
+		198000	950000
+	>;
+	fsl,soc-operating-points = <
+		/* KHz	uV */
+		900000	1250000
+		792000	1250000 /* Voltage increased */
+		528000	1175000
+		396000	1175000
+		198000	1175000
+	>;
+};
+
+&gpio1 {
+	pinctrl-0 = <&pinctrl_spi1_switch>;
+	pinctrl-names = "default";
+	/*
+	 * Pin SPI_BOOT_FLASH_EN (GPIO 1.9) is a switch for either using the
+	 * DHCOM SPI1 interface or accessing the SPI bootflash. Both using
+	 * ecspi1, but muxed to different pins. The DHCOM SPI1 interface uses
+	 * the pins PAD_LCD_DATA21..23 and the SPI bootflash uses the pins
+	 * PAD_CSI_DATA04..07. If the SPI bootflash is enabled the pins for
+	 * DHCOM GPIOs N/O/P/Q/R/S/T/U aren't usable anymore, because they
+	 * are used for the bus interface to the SPI bootflash. The GPIOs are
+	 * disconnected by a buffer which is also controlled via the pin
+	 * SPI_BOOT_FLASH_EN. Therefore the access to the bootflash is a
+	 * special case and is disabled by setting GPIO 1.9 to high.
+	 */
+	spi1-switch-hog {
+		gpio-hog;
+		gpios = <9 0>;
+		output-high;
+		line-name = "spi1-switch";
+	};
+};
+
+&i2c1 {
+	clock-frequency = <100000>;
+	pinctrl-0 = <&pinctrl_i2c1>;
+	pinctrl-1 = <&pinctrl_i2c1_gpio>;
+	pinctrl-names = "default", "gpio";
+	scl-gpios = <&gpio1 28 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+	sda-gpios = <&gpio1 29 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+	status = "okay";
+
+	pmic@58 {
+		compatible = "dlg,da9061";
+		reg = <0x58>;
+
+		onkey {
+			compatible = "dlg,da9061-onkey", "dlg,da9062-onkey";
+			status = "disabled";
+		};
+
+		regulators {
+			vdd_soc_in_1v4: buck1 {
+				regulator-always-on;
+				regulator-boot-on;
+				regulator-max-microvolt = <1400000>;
+				regulator-min-microvolt = <1400000>;
+				regulator-name = "vdd_soc_in_1v4";
+			};
+
+			vcc_3v3: buck2 {
+				regulator-always-on;
+				regulator-boot-on;
+				regulator-max-microvolt = <3300000>;
+				regulator-min-microvolt = <3300000>;
+				regulator-name = "vcc_3v3";
+			};
+
+			/*
+			 * The current DRR3 memory can be supplied with a
+			 * voltage of either 1.35V or 1.5V. For reasons of
+			 * backward compatibility to only 1.5V DDR3 memory,
+			 * the voltage is set to 1.5V.
+			 */
+			vcc_ddr_1v35: buck3 {
+				regulator-always-on;
+				regulator-boot-on;
+				regulator-max-microvolt = <1500000>;
+				regulator-min-microvolt = <1500000>;
+				regulator-name = "vcc_ddr_1v35";
+			};
+
+			vcc_2v5: ldo1 {
+				regulator-always-on;
+				regulator-boot-on;
+				regulator-max-microvolt = <2500000>;
+				regulator-min-microvolt = <2500000>;
+				regulator-name = "vcc_2v5";
+			};
+
+			vdd_snvs_in_3v3: ldo2 {
+				regulator-always-on;
+				regulator-boot-on;
+				regulator-max-microvolt = <3300000>;
+				regulator-min-microvolt = <3300000>;
+				regulator-name = "vdd_snvs_in_3v3";
+			};
+
+			vcc_1v8: ldo3 {
+				regulator-always-on;
+				regulator-boot-on;
+				regulator-max-microvolt = <1800000>;
+				regulator-min-microvolt = <1800000>;
+				regulator-name = "vcc_1v8";
+			};
+
+			vcc_1v2: ldo4 {
+				regulator-always-on;
+				regulator-boot-on;
+				regulator-max-microvolt = <1200000>;
+				regulator-min-microvolt = <1200000>;
+				regulator-name = "vcc_1v2";
+			};
+		};
+
+		thermal {
+			compatible = "dlg,da9061-thermal", "dlg,da9062-thermal";
+			status = "disabled";
+		};
+
+		watchdog {
+			compatible = "dlg,da9061-watchdog", "dlg,da9062-watchdog";
+			status = "disabled";
+		};
+	};
+};
+
+&ocotp {
+	/* Don't get write access by default */
+	read-only;
+};
+
+&reg_arm {
+	vin-supply = <&vdd_soc_in_1v4>;
+};
+
+&reg_soc {
+	vin-supply = <&vdd_soc_in_1v4>;
+};
+
+/* BT on LGA (BT_REG_ON is connected to LGA pin E1) */
+&uart2 {
+	pinctrl-0 = <&pinctrl_uart2>;
+	pinctrl-names = "default";
+	uart-has-rtscts;
+	status = "okay";
+
+	/*
+	 * Actually, the maximum speed of the chip is 4MBdps, but there are
+	 * limitations that prevent this speed. It hasn't yet been figured out
+	 * what the reason for this is. Currently, the maximum speed of 3MBdps
+	 * can be used without any problems. If the limitation can be overcome,
+	 * the speed can be increased accordingly.
+	 */
+	bluetooth: bluetooth {
+		compatible = "brcm,bcm43430a1-bt"; /* muRata 1DX */
+		max-speed = <3000000>;
+		vbat-supply = <&vcc_3v3>;
+		vddio-supply = <&vcc_3v3>;
+	};
+};
+
+/* WiFi on LGA (WL_REG_ON is connected to LGA pin E3) */
+&usdhc1 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	bus-width = <4>;
+	no-1-8-v;
+	non-removable;
+	keep-power-in-suspend;
+	pinctrl-0 = <&pinctrl_usdhc1_wifi>;
+	pinctrl-names = "default";
+	wakeup-source;
+	status = "okay";
+
+	brcmf: wifi@1 {
+		compatible = "brcm,bcm43430a1-fmac", "brcm,bcm4329-fmac"; /* muRata 1DX */
+		reg = <1>;
+	};
+};
+
+&iomuxc {
+	pinctrl_i2c1: i2c1-grp {
+		fsl,pins = <
+			MX6UL_PAD_UART4_TX_DATA__I2C1_SCL	0x4001b8b0
+			MX6UL_PAD_UART4_RX_DATA__I2C1_SDA	0x4001b8b0
+		>;
+	};
+
+	pinctrl_i2c1_gpio: i2c1-gpio-grp {
+		fsl,pins = <
+			MX6UL_PAD_UART4_TX_DATA__GPIO1_IO28	0x4001b8b0
+			MX6UL_PAD_UART4_RX_DATA__GPIO1_IO29	0x4001b8b0
+		>;
+	};
+
+	pinctrl_spi1_switch: spi1-switch-grp {
+		fsl,pins = <
+			MX6UL_PAD_GPIO1_IO09__GPIO1_IO09	0x120b0 /* SPI_BOOT_FLASH_EN */
+		>;
+	};
+
+	pinctrl_uart2: uart2-grp {
+		fsl,pins = <
+			MX6UL_PAD_UART2_TX_DATA__UART2_DCE_TX	0x1b0b1
+			MX6UL_PAD_UART2_RX_DATA__UART2_DCE_RX	0x1b0b1
+			MX6UL_PAD_UART3_RX_DATA__UART2_DCE_RTS	0x1b0b1
+			MX6UL_PAD_UART3_TX_DATA__UART2_DCE_CTS	0x1b0b1
+		>;
+	};
+
+	pinctrl_usdhc1_wifi: usdhc1-wifi-grp {
+		fsl,pins = <
+			MX6UL_PAD_SD1_CMD__USDHC1_CMD		0x1b0b0
+			MX6UL_PAD_SD1_CLK__USDHC1_CLK		0x10010
+			MX6UL_PAD_SD1_DATA0__USDHC1_DATA0	0x1b0b0
+			MX6UL_PAD_SD1_DATA1__USDHC1_DATA1	0x1b0b0
+			MX6UL_PAD_SD1_DATA2__USDHC1_DATA2	0x1b0b0
+			MX6UL_PAD_SD1_DATA3__USDHC1_DATA3	0x1b0b0
+		>;
+	};
+};