[PATCH v6 3/3] riscv64: dts: sophgo: add initial Milk-V Duo S board support
Joshua Milas
josh.milas at gmail.com
Mon Jun 15 05:03:24 PDT 2026
This adds initial riscv support for the Milk-V Duo S board
[1] making it possible to boot Linux to the command line.
Link: https://milkv.io/duo-s [1]
Signed-off-by: Joshua Milas <josh.milas at gmail.com>
---
arch/riscv/boot/dts/sophgo/Makefile | 1 +
.../boot/dts/sophgo/sg2000-milkv-duo-s.dts | 245 ++++++++++++++++++
2 files changed, 246 insertions(+)
create mode 100644 arch/riscv/boot/dts/sophgo/sg2000-milkv-duo-s.dts
diff --git a/arch/riscv/boot/dts/sophgo/Makefile b/arch/riscv/boot/dts/sophgo/Makefile
index 6f65526d4193..58cc6b70d8de 100644
--- a/arch/riscv/boot/dts/sophgo/Makefile
+++ b/arch/riscv/boot/dts/sophgo/Makefile
@@ -1,6 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
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-$(CONFIG_ARCH_SOPHGO) += sg2042-milkv-pioneer.dtb
dtb-$(CONFIG_ARCH_SOPHGO) += sg2042-evb-v1.dtb
diff --git a/arch/riscv/boot/dts/sophgo/sg2000-milkv-duo-s.dts b/arch/riscv/boot/dts/sophgo/sg2000-milkv-duo-s.dts
new file mode 100644
index 000000000000..f56bfddeacc4
--- /dev/null
+++ b/arch/riscv/boot/dts/sophgo/sg2000-milkv-duo-s.dts
@@ -0,0 +1,245 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+
+/dts-v1/;
+
+#include <dt-bindings/pinctrl/pinctrl-sg2000.h>
+#include "sg2000.dtsi"
+
+/ {
+ model = "Milk-V Duo S";
+ compatible = "milkv,duo-s", "sophgo,sg2000";
+
+ aliases {
+ i2c4 = &i2c4;
+ mmc0 = &sdhci0;
+ mmc1 = &emmc;
+ mmc2 = &sdhci1;
+ serial0 = &uart0;
+ serial4 = &uart4;
+ };
+
+ chosen {
+ stdout-path = "serial0:115200n8";
+ };
+
+ wifi_pwrseq: wifi-pwrseq {
+ compatible = "mmc-pwrseq-simple";
+ reset-gpios = <&porta 15 GPIO_ACTIVE_LOW>;
+ power-off-delay-us = <50000>;
+ post-power-on-delay-ms = <200>;
+ };
+};
+
+&osc {
+ clock-frequency = <25000000>;
+};
+
+&pinctrl {
+ emmc_cfg: emmc-cfg {
+ emmc-rstn-pins {
+ pinmux = <PINMUX(PIN_EMMC_RSTN, 0)>;
+ bias-pull-up;
+ drive-strength-microamp = <10800>;
+ power-source = <1800>;
+ };
+
+ emmc-clk-pins {
+ pinmux = <PINMUX(PIN_EMMC_CLK, 0)>;
+ bias-pull-up;
+ drive-strength-microamp = <10800>;
+ power-source = <1800>;
+ };
+
+ emmc-cmd-pins {
+ pinmux = <PINMUX(PIN_EMMC_CMD, 0)>;
+ bias-pull-up;
+ drive-strength-microamp = <10800>;
+ power-source = <1800>;
+ };
+
+ emmc-data-pins {
+ pinmux = <PINMUX(PIN_EMMC_DAT0, 0)>,
+ <PINMUX(PIN_EMMC_DAT1, 0)>,
+ <PINMUX(PIN_EMMC_DAT2, 0)>,
+ <PINMUX(PIN_EMMC_DAT3, 0)>;
+ bias-pull-up;
+ drive-strength-microamp = <10800>;
+ power-source = <1800>;
+ };
+ };
+
+ i2c4_cfg: i2c4-cfg {
+ i2c4-pins {
+ pinmux = <PINMUX(PIN_VIVO_D1, 7)>,
+ <PINMUX(PIN_VIVO_D0, 7)>;
+ bias-pull-up;
+ drive-strength-microamp = <4000>;
+ power-source = <1800>;
+ };
+ };
+
+ sdhci0_cfg: sdhci0-cfg {
+ sdhci0-cd-pins {
+ pinmux = <PINMUX(PIN_SD0_CD, 0)>;
+ bias-pull-up;
+ drive-strength-microamp = <10800>;
+ power-source = <3300>;
+ };
+
+ 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>;
+ };
+ };
+
+ sdhci1_cfg: sdhci1-cfg {
+ sdhci1-clk-pins {
+ pinmux = <PINMUX(PIN_MIPI_TXM4, 1)>;
+ bias-pull-up;
+ drive-strength-microamp = <10800>;
+ power-source = <1800>;
+ };
+
+ sdhci1-cmd-pins {
+ pinmux = <PINMUX(PIN_MIPI_TXP4, 1)>;
+ bias-pull-up;
+ drive-strength-microamp = <10800>;
+ power-source = <1800>;
+ };
+
+ sdhci1-data-pins {
+ pinmux = <PINMUX(PIN_MIPI_TXM3, 1)>,
+ <PINMUX(PIN_MIPI_TXP3, 1)>,
+ <PINMUX(PIN_MIPI_TXM2, 7)>,
+ <PINMUX(PIN_MIPI_TXP2, 7)>;
+ bias-pull-up;
+ drive-strength-microamp = <10800>;
+ power-source = <1800>;
+ };
+ };
+
+ 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>;
+ };
+ };
+
+ uart4_cfg: uart4-cfg {
+ uart4-data-pins {
+ pinmux = <PINMUX(PIN_UART2_TX, 5)>,
+ <PINMUX(PIN_UART2_RX, 5)>;
+ drive-strength-microamp = <10800>;
+ power-source = <3300>;
+ };
+
+ uart4-control-pins {
+ pinmux = <PINMUX(PIN_UART2_CTS, 5)>,
+ <PINMUX(PIN_UART2_RTS, 5)>;
+ bias-pull-up;
+ drive-strength-microamp = <10800>;
+ power-source = <3300>;
+ };
+ };
+};
+
+&dmac {
+ status = "okay";
+};
+
+&emmc {
+ bus-width = <4>;
+ no-1-8-v;
+ cap-mmc-hw-reset;
+ no-sd;
+ no-sdio;
+ non-removable;
+ pinctrl-0 = <&emmc_cfg>;
+ pinctrl-names = "default";
+ status = "okay";
+};
+
+&gmac0 {
+ status = "okay";
+};
+
+&i2c4 {
+ pinctrl-0 = <&i2c4_cfg>;
+ pinctrl-names = "default";
+ status = "okay";
+};
+
+&mdio {
+ status = "okay";
+};
+
+&saradc {
+ status = "okay";
+};
+
+&sdhci0 {
+ bus-width = <4>;
+ disable-wp;
+ no-1-8-v;
+ pinctrl-0 = <&sdhci0_cfg>;
+ pinctrl-names = "default";
+ status = "okay";
+};
+
+&sdhci1 {
+ bus-width = <4>;
+ cap-sdio-irq;
+ cap-sd-highspeed;
+ keep-power-in-suspend;
+ no-mmc;
+ no-sd;
+ non-removable;
+ max-frequency = <150000000>;
+ mmc-pwrseq = <&wifi_pwrseq>;
+ pinctrl-0 = <&sdhci1_cfg>;
+ pinctrl-names = "default";
+ sd-uhs-sdr50;
+ sd-uhs-sdr104;
+ status = "okay";
+};
+
+&uart0 {
+ pinctrl-0 = <&uart0_cfg>;
+ pinctrl-names = "default";
+ status = "okay";
+};
+
+&uart4 {
+ pinctrl-0 = <&uart4_cfg>;
+ pinctrl-names = "default";
+ uart-has-rtscts;
+ status = "okay";
+};
+
+&usb {
+ dr_mode = "host";
+ status = "okay";
+};
+
--
2.54.0
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