[PATCH v5 1/3] dt-bindings: soc: sophgo: add Milk-V Duo 256M board

[PATCH v5 1/3] dt-bindings: soc: sophgo: add Milk-V Duo 256M board

[Chen-Yu Yeh]

Add compatible string for the Milk-V Duo 256M board.

Signed-off-by: Chen-Yu Yeh <chenyou910331@gmail.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
---
 Documentation/devicetree/bindings/soc/sophgo/sophgo.yaml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/soc/sophgo/sophgo.yaml b/Documentation/devicetree/bindings/soc/sophgo/sophgo.yaml
index 0b6fbab48b74..99194d8721ef 100644
--- a/Documentation/devicetree/bindings/soc/sophgo/sophgo.yaml
+++ b/Documentation/devicetree/bindings/soc/sophgo/sophgo.yaml
@@ -35,6 +35,10 @@ properties:
           - enum:
               - milkv,duo-s
           - const: sophgo,sg2000
+      - items:
+          - enum:
+              - milkv,duo256m
+          - const: sophgo,sg2002
       - items:
           - enum:
               - sipeed,licheerv-nano-b
-- 
2.43.0

[PATCH v5 2/3] riscv: dts: sophgo: cv180x: Add PWR_GPIO controller

[Chen-Yu Yeh]

The CV180x/CV181x family has an additional DesignWare APB GPIO
controller (PWR_GPIO) located in the always-on power domain at
0x5021000. Add the node so that boards can reference GPIOs in this
bank, such as status LEDs.

Signed-off-by: Chen-Yu Yeh <chenyou910331@gmail.com>
---
 arch/riscv/boot/dts/sophgo/cv180x.dtsi | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/arch/riscv/boot/dts/sophgo/cv180x.dtsi b/arch/riscv/boot/dts/sophgo/cv180x.dtsi
index 06b0ce5a2db7..8bf67ee4eca5 100644
--- a/arch/riscv/boot/dts/sophgo/cv180x.dtsi
+++ b/arch/riscv/boot/dts/sophgo/cv180x.dtsi
@@ -448,6 +448,24 @@ usb: usb@4340000 {
 			status = "disabled";
 		};
 
+		gpio4: gpio@5021000 {
+			compatible = "snps,dw-apb-gpio";
+			reg = <0x5021000 0x1000>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			porte: gpio-controller@0 {
+				compatible = "snps,dw-apb-gpio-port";
+				gpio-controller;
+				#gpio-cells = <2>;
+				ngpios = <32>;
+				reg = <0>;
+				interrupt-controller;
+				#interrupt-cells = <2>;
+				interrupts = <SOC_PERIPHERAL_IRQ(54) IRQ_TYPE_LEVEL_HIGH>;
+			};
+		};
+
 		rtc@5025000 {
 			compatible = "sophgo,cv1800b-rtc", "syscon";
 			reg = <0x5025000 0x2000>;
-- 
2.43.0

[PATCH v5 3/3] riscv: dts: sophgo: Add Milk-V Duo 256M board support

[Chen-Yu Yeh]

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>
---
 arch/riscv/boot/dts/sophgo/Makefile           |   1 +
 .../boot/dts/sophgo/sg2002-milkv-duo256m.dts  | 121 ++++++++++++++++++
 2 files changed, 122 insertions(+)
 create mode 100644 arch/riscv/boot/dts/sophgo/sg2002-milkv-duo256m.dts

diff --git a/arch/riscv/boot/dts/sophgo/Makefile b/arch/riscv/boot/dts/sophgo/Makefile
index 6f65526d4193..1ff69cf7f178 100644
--- a/arch/riscv/boot/dts/sophgo/Makefile
+++ b/arch/riscv/boot/dts/sophgo/Makefile
@@ -2,6 +2,7 @@
 dtb-$(CONFIG_ARCH_SOPHGO) += cv1800b-milkv-duo.dtb
 dtb-$(CONFIG_ARCH_SOPHGO) += cv1812h-huashan-pi.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
diff --git a/arch/riscv/boot/dts/sophgo/sg2002-milkv-duo256m.dts b/arch/riscv/boot/dts/sophgo/sg2002-milkv-duo256m.dts
new file mode 100644
index 000000000000..a2797c0bd767
--- /dev/null
+++ b/arch/riscv/boot/dts/sophgo/sg2002-milkv-duo256m.dts
@@ -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";
+};
-- 
2.43.0