[PATCH 10/12] riscv: dts: allwinner: Add Dongshan Nezha STU devicetree

[Samuel Holland]

The 100ask Dongshan Nezha STU is a system-on-module that can be used
standalone or with a carrier board. The SoM provides gigabit Ethernet,
HDMI, a USB peripheral port, and WiFi/Bluetooth via an RTL8723DS chip.

The "DIY" carrier board exposes almost every pin from the D1 SoC to 0.1"
headers, but contains no digital circuitry, so it does not have its own
devicetree.

Signed-off-by: Samuel Holland <samuel at sholland.org>
---

 arch/riscv/boot/dts/allwinner/Makefile        |   1 +
 .../sun20i-d1-dongshan-nezha-stu.dts          | 114 ++++++++++++++++++
 2 files changed, 115 insertions(+)
 create mode 100644 arch/riscv/boot/dts/allwinner/sun20i-d1-dongshan-nezha-stu.dts

diff --git a/arch/riscv/boot/dts/allwinner/Makefile b/arch/riscv/boot/dts/allwinner/Makefile
index bcc304175753..530ef8adb8b0 100644
--- a/arch/riscv/boot/dts/allwinner/Makefile
+++ b/arch/riscv/boot/dts/allwinner/Makefile
@@ -1,4 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0
+dtb-$(CONFIG_ARCH_SUNXI) += sun20i-d1-dongshan-nezha-stu.dtb
 dtb-$(CONFIG_ARCH_SUNXI) += sun20i-d1-lichee-rv-86-panel-480p.dtb
 dtb-$(CONFIG_ARCH_SUNXI) += sun20i-d1-lichee-rv-86-panel-720p.dtb
 dtb-$(CONFIG_ARCH_SUNXI) += sun20i-d1-lichee-rv-dock.dtb
diff --git a/arch/riscv/boot/dts/allwinner/sun20i-d1-dongshan-nezha-stu.dts b/arch/riscv/boot/dts/allwinner/sun20i-d1-dongshan-nezha-stu.dts
new file mode 100644
index 000000000000..c3d06dfaa7c3
--- /dev/null
+++ b/arch/riscv/boot/dts/allwinner/sun20i-d1-dongshan-nezha-stu.dts
@@ -0,0 +1,114 @@
+// SPDX-License-Identifier: (GPL-2.0+ or MIT)
+// Copyright (C) 2022 Samuel Holland <samuel at sholland.org>
+
+/dts-v1/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/leds/common.h>
+
+#include "sun20i-d1.dtsi"
+#include "sun20i-d1-common-regulators.dtsi"
+
+/ {
+	model = "Dongshan Nezha STU";
+	compatible = "100ask,dongshan-nezha-stu", "allwinner,sun20i-d1";
+
+	aliases {
+		ethernet0 = &emac;
+		mmc0 = &mmc0;
+		serial0 = &uart0;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led-0 {
+			color = <LED_COLOR_ID_GREEN>;
+			function = LED_FUNCTION_STATUS;
+			gpios = <&pio 2 1 GPIO_ACTIVE_HIGH>; /* PC1 */
+		};
+	};
+
+	reg_usbvbus: usbvbus {
+		compatible = "regulator-fixed";
+		regulator-name = "usbvbus";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		gpio = <&pio 3 19 GPIO_ACTIVE_HIGH>; /* PD19 */
+		enable-active-high;
+		vin-supply = <&reg_vcc>;
+	};
+
+	/*
+	 * This regulator is PWM-controlled, but the PWM controller is not
+	 * yet supported, so fix the regulator to its default voltage.
+	 */
+	reg_vdd_cpu: vdd-cpu {
+		compatible = "regulator-fixed";
+		regulator-name = "vdd-cpu";
+		regulator-min-microvolt = <1100000>;
+		regulator-max-microvolt = <1100000>;
+		vin-supply = <&reg_vcc>;
+	};
+};
+
+&cpu0 {
+	cpu-supply = <&reg_vdd_cpu>;
+};
+
+&ehci0 {
+	status = "okay";
+};
+
+&emac {
+	pinctrl-0 = <&rgmii_pe_pins>;
+	pinctrl-names = "default";
+	phy-handle = <&ext_rgmii_phy>;
+	phy-mode = "rgmii-id";
+	phy-supply = <&reg_vcc_3v3>;
+	status = "okay";
+};
+
+&mdio {
+	ext_rgmii_phy: ethernet-phy at 1 {
+		compatible = "ethernet-phy-ieee802.3-c22";
+		reg = <1>;
+	};
+};
+
+&mmc0 {
+	broken-cd;
+	bus-width = <4>;
+	disable-wp;
+	vmmc-supply = <&reg_vcc_3v3>;
+	vqmmc-supply = <&reg_vcc_3v3>;
+	pinctrl-0 = <&mmc0_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
+&ohci0 {
+	status = "okay";
+};
+
+&uart0 {
+	pinctrl-0 = <&uart0_pb8_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
+&usb_otg {
+	dr_mode = "otg";
+	status = "okay";
+};
+
+&usbphy {
+	usb0_id_det-gpios = <&pio 3 21 GPIO_ACTIVE_HIGH>; /* PD21 */
+	usb0_vbus_det-gpios = <&pio 3 20 GPIO_ACTIVE_HIGH>; /* PD20 */
+	usb0_vbus-supply = <&reg_usbvbus>;
+	status = "okay";
+};
-- 
2.35.1