riscv: dts: starfive: add common board dtsi for Milk-V Mars CM variants

Add a common board dtsi for use by Milk-V Mars CM and Milk-V Mars CM Lite.

Signed-off-by: E Shattow <e@freeshell.de>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>

[ upstream commit: 651b30c58775e334c79aa3ecd44a3d98ac201db2 ]

(cherry picked from commit 034af14dcd1e6dbfa4f41a340b6d92b054604858)

dts/upstream/src/riscv/starfive/jh7110-milkv-marscm.dtsi

@@ -0,0 +1,159 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/*
+ * Copyright (C) 2025 E Shattow <e@freeshell.de>
+ */
+
+/dts-v1/;
+#include <dt-bindings/interrupt-controller/irq.h>
+#include "jh7110-common.dtsi"
+
+/ {
+	aliases {
+		i2c1 = &i2c1;
+		i2c3 = &i2c3;
+		i2c4 = &i2c4;
+		serial3 = &uart3;
+	};
+
+	sdio_pwrseq: sdio-pwrseq {
+		compatible = "mmc-pwrseq-simple";
+		reset-gpios = <&sysgpio 33 GPIO_ACTIVE_LOW>;
+	};
+};
+
+&gmac0 {
+	assigned-clocks = <&aoncrg JH7110_AONCLK_GMAC0_TX>;
+	assigned-clock-parents = <&aoncrg JH7110_AONCLK_GMAC0_RMII_RTX>;
+	starfive,tx-use-rgmii-clk;
+	status = "okay";
+};
+
+&i2c0 {
+	status = "okay";
+};
+
+&i2c2 {
+	status = "disabled";
+};
+
+&i2c6 {
+	status = "disabled";
+};
+
+&mmc1 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	mmc-pwrseq = <&sdio_pwrseq>;
+	non-removable;
+	status = "okay";
+
+	ap6256: wifi@1 {
+		compatible = "brcm,bcm43456-fmac", "brcm,bcm4329-fmac";
+		reg = <1>;
+		interrupt-parent = <&sysgpio>;
+		interrupts = <34 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-names = "host-wake";
+		pinctrl-0 = <&wifi_host_wake_irq>;
+		pinctrl-names = "default";
+	};
+};
+
+&pcie0 {
+	status = "okay";
+};
+
+&phy0 {
+	rx-internal-delay-ps = <1500>;
+	tx-internal-delay-ps = <1500>;
+	motorcomm,rx-clk-drv-microamp = <3970>;
+	motorcomm,rx-data-drv-microamp = <2910>;
+	motorcomm,tx-clk-10-inverted;
+	motorcomm,tx-clk-100-inverted;
+	motorcomm,tx-clk-1000-inverted;
+	motorcomm,tx-clk-adj-enabled;
+};
+
+&pwm {
+	status = "okay";
+};
+
+&spi0 {
+	status = "okay";
+};
+
+&sysgpio {
+	uart1_pins: uart1-0 {
+		tx-pins {
+			pinmux = <GPIOMUX(16, GPOUT_SYS_UART1_TX,
+					      GPOEN_ENABLE,
+					      GPI_NONE)>;
+			bias-disable;
+			drive-strength = <12>;
+			input-disable;
+			input-schmitt-disable;
+		};
+
+		rx-pins {
+			pinmux = <GPIOMUX(17, GPOUT_LOW,
+					      GPOEN_DISABLE,
+					      GPI_SYS_UART1_RX)>;
+			bias-pull-up;
+			input-enable;
+			input-schmitt-enable;
+		};
+
+		cts-pins {
+			pinmux = <GPIOMUX(3, GPOUT_LOW,
+					     GPOEN_DISABLE,
+					     GPI_SYS_UART1_CTS)>;
+			bias-disable;
+			input-enable;
+			input-schmitt-enable;
+		};
+
+		rts-pins {
+			pinmux = <GPIOMUX(2, GPOUT_SYS_UART1_RTS,
+					     GPOEN_ENABLE,
+					     GPI_NONE)>;
+			bias-disable;
+			input-disable;
+			input-schmitt-disable;
+		};
+	};
+
+	usb0_pins: usb0-0 {
+		vbus-pins {
+			pinmux = <GPIOMUX(25, GPOUT_SYS_USB_DRIVE_VBUS,
+					      GPOEN_ENABLE,
+					      GPI_NONE)>;
+			bias-disable;
+			input-disable;
+			input-schmitt-disable;
+			slew-rate = <0>;
+		};
+	};
+
+	wifi_host_wake_irq: wifi-host-wake-irq-0 {
+		wake-pins {
+			pinmux = <GPIOMUX(34, GPOUT_LOW,
+					      GPOEN_DISABLE,
+					      GPI_NONE)>;
+			input-enable;
+		};
+	};
+};
+
+&uart1 {
+	uart-has-rtscts;
+	pinctrl-0 = <&uart1_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
+&usb0 {
+	dr_mode = "host";
+	pinctrl-names = "default";
+	pinctrl-0 = <&usb0_pins>;
+	status = "okay";
+};