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riscv: dts: sophgo: Add Milk-V Duo 256M board support

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The Milk-V Duo 256M is a small form factor development board based on
the Sophgo SG2002 SoC.

This patch adds basic device tree support for the board, including:
- UART console
- SD/MMC controller
- USB host
- Onboard blue status LED (connected to PWR_GPIO[2] / porte 2)

Tested on actual Milk-V Duo 256M hardware, verified boot to shell and
heartbeat LED functionality.

Signed-off-by: Chen-Yu Yeh <chenyou910331@gmail.com>
Link: https://patch.msgid.link/20260725175346.139173-4-chenyou910331@gmail.com
Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
Signed-off-by: Chen Wang <chen.wang@linux.dev>
This commit is contained in:
Chen-Yu Yeh 2026-07-26 01:53:45 +08:00 committed by Inochi Amaoto
parent 76237a509a
commit 59c682ffc7
No known key found for this signature in database
GPG Key ID: 9BC854A73E78BE50
2 changed files with 122 additions and 0 deletions
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1
arch/riscv/boot/dts/sophgo/Makefile
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@ -3,6 +3,7 @@ dtb-$(CONFIG_ARCH_SOPHGO) += cv1800b-milkv-duo.dtb
dtb-$(CONFIG_ARCH_SOPHGO) += cv1812h-huashan-pi.dtb
dtb-$(CONFIG_ARCH_SOPHGO) += sg2000-milkv-duo-s.dtb
dtb-$(CONFIG_ARCH_SOPHGO) += sg2002-licheerv-nano-b.dtb
dtb-$(CONFIG_ARCH_SOPHGO) += sg2002-milkv-duo256m.dtb
dtb-$(CONFIG_ARCH_SOPHGO) += sg2042-milkv-pioneer.dtb
dtb-$(CONFIG_ARCH_SOPHGO) += sg2042-evb-v1.dtb
dtb-$(CONFIG_ARCH_SOPHGO) += sg2042-evb-v2.dtb

121
arch/riscv/boot/dts/sophgo/sg2002-milkv-duo256m.dts Normal file
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@ -0,0 +1,121 @@
// SPDX-License-Identifier: (GPL-2.0 OR MIT)
/*
* Copyright (C) 2023 Jisheng Zhang <jszhang@kernel.org>
* Copyright (C) 2026 Chen-Yu Yeh <chenyou910331@gmail.com>
*/
/dts-v1/;
#include "sg2002.dtsi"
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/leds/common.h>
/ {
model = "Milk-V Duo 256M";
compatible = "milkv,duo256m", "sophgo,sg2002";
aliases {
serial0 = &uart0;
serial1 = &uart1;
serial2 = &uart2;
serial3 = &uart3;
serial4 = &uart4;
};
chosen {
stdout-path = "serial0:115200n8";
};
leds {
compatible = "gpio-leds";
led-0 {
gpios = <&porte 2 GPIO_ACTIVE_HIGH>;
color = <LED_COLOR_ID_BLUE>;
function = LED_FUNCTION_STATUS;
linux,default-trigger = "heartbeat";
};
};
reserved-memory {
#address-cells = <1>;
#size-cells = <1>;
ranges;
coprocessor_rtos: region@8fe00000 {
reg = <0x8fe00000 0x200000>;
no-map;
};
};
};
&osc {
clock-frequency = <25000000>;
};
&pinctrl {
uart0_cfg: uart0-cfg {
uart0-pins {
pinmux = <PINMUX(PIN_UART0_TX, 0)>,
<PINMUX(PIN_UART0_RX, 0)>;
bias-pull-up;
drive-strength-microamp = <10800>;
power-source = <3300>;
};
};
sdhci0_cfg: sdhci0-cfg {
sdhci0-clk-pins {
pinmux = <PINMUX(PIN_SD0_CLK, 0)>;
bias-pull-up;
drive-strength-microamp = <16100>;
power-source = <3300>;
};
sdhci0-cmd-pins {
pinmux = <PINMUX(PIN_SD0_CMD, 0)>;
bias-pull-up;
drive-strength-microamp = <10800>;
power-source = <3300>;
};
sdhci0-data-pins {
pinmux = <PINMUX(PIN_SD0_D0, 0)>,
<PINMUX(PIN_SD0_D1, 0)>,
<PINMUX(PIN_SD0_D2, 0)>,
<PINMUX(PIN_SD0_D3, 0)>;
bias-pull-up;
drive-strength-microamp = <10800>;
power-source = <3300>;
};
sdhci0-cd-pins {
pinmux = <PINMUX(PIN_SD0_CD, 0)>;
bias-pull-up;
drive-strength-microamp = <10800>;
power-source = <3300>;
};
};
};
&sdhci0 {
pinctrl-0 = <&sdhci0_cfg>;
pinctrl-names = "default";
status = "okay";
bus-width = <4>;
no-1-8-v;
no-mmc;
no-sdio;
disable-wp;
};
&uart0 {
pinctrl-0 = <&uart0_cfg>;
pinctrl-names = "default";
status = "okay";
};
&usb {
dr_mode = "host";
status = "okay";
};