@@ -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
new file mode 100644
@@ -0,0 +1,114 @@
+// SPDX-License-Identifier: (GPL-2.0+ or MIT)
+// Copyright (C) 2022 Samuel Holland <samuel@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 = <®_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 = <®_vcc>;
+ };
+};
+
+&cpu0 {
+ cpu-supply = <®_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 = <®_vcc_3v3>;
+ status = "okay";
+};
+
+&mdio {
+ ext_rgmii_phy: ethernet-phy@1 {
+ compatible = "ethernet-phy-ieee802.3-c22";
+ reg = <1>;
+ };
+};
+
+&mmc0 {
+ broken-cd;
+ bus-width = <4>;
+ disable-wp;
+ vmmc-supply = <®_vcc_3v3>;
+ vqmmc-supply = <®_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 = <®_usbvbus>;
+ status = "okay";
+};
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@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