[PATCH v5 0/5] Add initial Milk-V Duo S board support

[PATCH v5 0/5] Add initial Milk-V Duo S board support

[Joshua Milas]

This adds an initial device tree for the Milk-V Duo S board
with support for reading from the SD card and network over
Ethernet. This is continued work from Michael Opdenacker's
v6 series [1] on the ARM64 and RISCV side. It has been tested
with ARM64 and RISCV64 to boot from an SD card, have networking,
and read I2C slave devices over i2c4.

---

v5
- Fixes spaces at beginning of line in &usb node of DTS

v4: https://lore.kernel.org/sophgo/20260328173450.219664-2-josh.milas@gmail.com/
- Rebased to latest sophogo/for-next
- Added usb node to arm64 and riscv DTS
- Removed sg200x link in commit messages
- Added missing change to v3 and removed link from v2

v3: https://lore.kernel.org/sophgo/20251029001052.36774-1-josh.milas@gmail.com/
- Added sg2000 interrupt controller and timer to documentation
- Added sg2000.dtsi for RISCV and moved DTS over to use it
- remove devices from DTS's to match what is available in the
  default pinmux config. spi0-2, i2c0-3, uart1-4
- Added i2c4 and spi3 aliases
- Removed milkv,duo-s from sophgo,cv1812h in documentation

v2: https://lore.kernel.org/sophgo/20251011014811.28521-1-josh.milas@gmail.com/
- Made new entry in docs to avoid DTC error
- "Milk-V DuoS" -> "Milk-V Duo S"
- Sorting of aliases
- Added uart*, emmc, mdio, gmac0, i2c*, spi*, dmac, saradc
  to device tree matching what is available on the pinout
- Removal of 'no-mmc' and 'no-sdio' for sdhci0 as it works without
- Added riscv device tree

v1: https://lore.kernel.org/sophgo/20250927173619.89768-1-josh.milas@gmail.com/

Link: https://lore.kernel.org/linux-riscv/20240421055710.143617-1-michael.opdenacker@bootlin.com/ [1]

Joshua Milas (5):
  dt-bindings: soc: sophgo: add Milk-V Duo S board compatibles
  arm64: dts: sophgo: add initial Milk-V Duo S board support
  dt-bindings: soc: sophgo: add sg2000 plic and clint documentation
  riscv64: dts: sophgo: add SG2000 dtsi
  riscv64: dts: sophgo: add initial Milk-V Duo S board support

 .../sifive,plic-1.0.0.yaml                    |  1 +
 .../bindings/soc/sophgo/sophgo.yaml           |  4 +
 .../bindings/timer/sifive,clint.yaml          |  1 +
 arch/arm64/boot/dts/sophgo/Makefile           |  1 +
 .../boot/dts/sophgo/sg2000-milkv-duo-s.dts    | 85 +++++++++++++++++++
 arch/riscv/boot/dts/sophgo/Makefile           |  1 +
 .../boot/dts/sophgo/sg2000-milkv-duo-s.dts    | 85 +++++++++++++++++++
 arch/riscv/boot/dts/sophgo/sg2000.dtsi        | 53 ++++++++++++
 8 files changed, 231 insertions(+)
 create mode 100644 arch/arm64/boot/dts/sophgo/sg2000-milkv-duo-s.dts
 create mode 100644 arch/riscv/boot/dts/sophgo/sg2000-milkv-duo-s.dts
 create mode 100644 arch/riscv/boot/dts/sophgo/sg2000.dtsi


base-commit: 9aa6068586a9b4cd34cf04f8dee72a7283ab4ae4
-- 
2.53.0

[PATCH v5 1/5] dt-bindings: soc: sophgo: add Milk-V Duo S board compatibles

[Joshua Milas]

Document the compatible strings for the Milk-V Duo S board [1]
which uses the SOPHGO SG2000 SoC.

Link: https://milkv.io/duo-s [1]

Signed-off-by: Joshua Milas <josh.milas@gmail.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 1c502618de51f..0b6fbab48b743 100644
--- a/Documentation/devicetree/bindings/soc/sophgo/sophgo.yaml
+++ b/Documentation/devicetree/bindings/soc/sophgo/sophgo.yaml
@@ -31,6 +31,10 @@ properties:
               - milkv,duo-module-01-evb
           - const: milkv,duo-module-01
           - const: sophgo,sg2000
+      - items:
+          - enum:
+              - milkv,duo-s
+          - const: sophgo,sg2000
       - items:
           - enum:
               - sipeed,licheerv-nano-b
-- 
2.53.0

[PATCH v5 2/5] arm64: dts: sophgo: add initial Milk-V Duo S board support

[Joshua Milas]

Adds initial arm64 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@gmail.com>
---
 arch/arm64/boot/dts/sophgo/Makefile           |  1 +
 .../boot/dts/sophgo/sg2000-milkv-duo-s.dts    | 85 +++++++++++++++++++
 2 files changed, 86 insertions(+)
 create mode 100644 arch/arm64/boot/dts/sophgo/sg2000-milkv-duo-s.dts

diff --git a/arch/arm64/boot/dts/sophgo/Makefile b/arch/arm64/boot/dts/sophgo/Makefile
index 94f52cd7d994b..68aace728223a 100644
--- a/arch/arm64/boot/dts/sophgo/Makefile
+++ b/arch/arm64/boot/dts/sophgo/Makefile
@@ -1,2 +1,3 @@
 # SPDX-License-Identifier: GPL-2.0
 dtb-$(CONFIG_ARCH_SOPHGO) += sg2000-milkv-duo-module-01-evb.dtb
+dtb-$(CONFIG_ARCH_SOPHGO) += sg2000-milkv-duo-s.dtb
diff --git a/arch/arm64/boot/dts/sophgo/sg2000-milkv-duo-s.dts b/arch/arm64/boot/dts/sophgo/sg2000-milkv-duo-s.dts
new file mode 100644
index 0000000000000..8632470f43ab0
--- /dev/null
+++ b/arch/arm64/boot/dts/sophgo/sg2000-milkv-duo-s.dts
@@ -0,0 +1,85 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+
+/dts-v1/;
+
+#include "sg2000.dtsi"
+
+/ {
+	model = "Milk-V Duo S";
+	compatible = "milkv,duo-s", "sophgo,sg2000";
+
+	aliases {
+		i2c4 = &i2c4;
+		mmc0 = &sdhci0;
+		serial0 = &uart0;
+		spi3 = &spi3;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+};
+
+&osc {
+	clock-frequency = <25000000>;
+};
+
+&dmac {
+	status = "okay";
+};
+
+&emmc {
+	bus-width = <4>;
+	no-1-8-v;
+	cap-mmc-hw-reset;
+	no-sd;
+	no-sdio;
+	non-removable;
+	status = "okay";
+};
+
+&gmac0 {
+	status = "okay";
+};
+
+&i2c4 {
+	status = "okay";
+};
+
+&mdio {
+	status = "okay";
+};
+
+&saradc {
+	status = "okay";
+};
+
+&sdhci0 {
+	bus-width = <4>;
+	no-1-8-v;
+	disable-wp;
+	status = "okay";
+};
+
+&sdhci1 {
+	bus-width = <4>;
+	cap-sdio-irq;
+	no-mmc;
+	no-sd;
+	non-removable;
+	status = "okay";
+};
+
+&spi3 {
+	status = "okay";
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&usb {
+	dr_mode = "host";
+	status = "okay";
+};
+
-- 
2.53.0

[PATCH v5 3/5] dt-bindings: soc: sophgo: add sg2000 plic and clint documentation

[Joshua Milas]

Document the compatible strings for the sg2000 interrupt
controller and timer.

Signed-off-by: Joshua Milas <josh.milas@gmail.com>
---
 .../bindings/interrupt-controller/sifive,plic-1.0.0.yaml         | 1 +
 Documentation/devicetree/bindings/timer/sifive,clint.yaml        | 1 +
 2 files changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml b/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml
index e0267223887ec..decc43df3c839 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml
+++ b/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml
@@ -73,6 +73,7 @@ properties:
               - allwinner,sun20i-d1-plic
               - sophgo,cv1800b-plic
               - sophgo,cv1812h-plic
+              - sophgo,sg2000-plic
               - sophgo,sg2002-plic
               - sophgo,sg2042-plic
               - sophgo,sg2044-plic
diff --git a/Documentation/devicetree/bindings/timer/sifive,clint.yaml b/Documentation/devicetree/bindings/timer/sifive,clint.yaml
index 3bab40500df9b..54266b3c2a185 100644
--- a/Documentation/devicetree/bindings/timer/sifive,clint.yaml
+++ b/Documentation/devicetree/bindings/timer/sifive,clint.yaml
@@ -50,6 +50,7 @@ properties:
               - allwinner,sun20i-d1-clint
               - sophgo,cv1800b-clint
               - sophgo,cv1812h-clint
+              - sophgo,sg2000-clint
               - sophgo,sg2002-clint
               - thead,th1520-clint
           - const: thead,c900-clint
-- 
2.53.0

[PATCH v5 4/5] riscv64: dts: sophgo: add SG2000 dtsi

[Joshua Milas]

Adds sg2000.dtsi on the RISCV side.

Signed-off-by: Joshua Milas <josh.milas@gmail.com>
---
 arch/riscv/boot/dts/sophgo/sg2000.dtsi | 53 ++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 arch/riscv/boot/dts/sophgo/sg2000.dtsi

diff --git a/arch/riscv/boot/dts/sophgo/sg2000.dtsi b/arch/riscv/boot/dts/sophgo/sg2000.dtsi
new file mode 100644
index 0000000000000..412adacc00576
--- /dev/null
+++ b/arch/riscv/boot/dts/sophgo/sg2000.dtsi
@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+
+#define SOC_PERIPHERAL_IRQ(nr)	((nr) + 16)
+
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/pinctrl/pinctrl-sg2000.h>
+#include "cv180x-cpus.dtsi"
+#include "cv180x.dtsi"
+#include "cv181x.dtsi"
+
+/ {
+	compatible = "sophgo,sg2000";
+
+	memory@80000000 {
+		device_type = "memory";
+		reg = <0x80000000 0x10000000>;
+	};
+
+	soc {
+		interrupt-parent = <&plic>;
+		dma-noncoherent;
+
+		pinctrl: pinctrl@3001000 {
+			compatible = "sophgo,sg2000-pinctrl";
+			reg = <0x03001000 0x1000>,
+			      <0x05027000 0x1000>;
+			reg-names = "sys", "rtc";
+		};
+
+		clk: clock-controller@3002000 {
+			compatible = "sophgo,sg2000-clk";
+			reg = <0x03002000 0x1000>;
+			clocks = <&osc>;
+			#clock-cells = <1>;
+		};
+
+		plic: interrupt-controller@70000000 {
+			compatible = "sophgo,sg2000-plic", "thead,c900-plic";
+			reg = <0x70000000 0x4000000>;
+			interrupts-extended = <&cpu0_intc 11>, <&cpu0_intc 9>;
+			interrupt-controller;
+			#address-cells = <0>;
+			#interrupt-cells = <2>;
+			riscv,ndev = <101>;
+		};
+
+		clint: timer@74000000 {
+			compatible = "sophgo,sg2000-clint", "thead,c900-clint";
+			reg = <0x74000000 0x10000>;
+			interrupts-extended = <&cpu0_intc 3>, <&cpu0_intc 7>;
+		};
+	};
+};
-- 
2.53.0

[PATCH v5 5/5] riscv64: dts: sophgo: add initial Milk-V Duo S board support

[Joshua Milas]

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@gmail.com>
---
 arch/riscv/boot/dts/sophgo/Makefile           |  1 +
 .../boot/dts/sophgo/sg2000-milkv-duo-s.dts    | 85 +++++++++++++++++++
 2 files changed, 86 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 6f65526d4193b..58cc6b70d8de4 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 0000000000000..8632470f43ab0
--- /dev/null
+++ b/arch/riscv/boot/dts/sophgo/sg2000-milkv-duo-s.dts
@@ -0,0 +1,85 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+
+/dts-v1/;
+
+#include "sg2000.dtsi"
+
+/ {
+	model = "Milk-V Duo S";
+	compatible = "milkv,duo-s", "sophgo,sg2000";
+
+	aliases {
+		i2c4 = &i2c4;
+		mmc0 = &sdhci0;
+		serial0 = &uart0;
+		spi3 = &spi3;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+};
+
+&osc {
+	clock-frequency = <25000000>;
+};
+
+&dmac {
+	status = "okay";
+};
+
+&emmc {
+	bus-width = <4>;
+	no-1-8-v;
+	cap-mmc-hw-reset;
+	no-sd;
+	no-sdio;
+	non-removable;
+	status = "okay";
+};
+
+&gmac0 {
+	status = "okay";
+};
+
+&i2c4 {
+	status = "okay";
+};
+
+&mdio {
+	status = "okay";
+};
+
+&saradc {
+	status = "okay";
+};
+
+&sdhci0 {
+	bus-width = <4>;
+	no-1-8-v;
+	disable-wp;
+	status = "okay";
+};
+
+&sdhci1 {
+	bus-width = <4>;
+	cap-sdio-irq;
+	no-mmc;
+	no-sd;
+	non-removable;
+	status = "okay";
+};
+
+&spi3 {
+	status = "okay";
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&usb {
+	dr_mode = "host";
+	status = "okay";
+};
+
-- 
2.53.0

Re: [PATCH v5 1/5] dt-bindings: soc: sophgo: add Milk-V Duo S board compatibles

[Krzysztof Kozlowski]

On Fri, Apr 03, 2026 at 07:15:12AM -0400, Joshua Milas wrote:
> Document the compatible strings for the Milk-V Duo S board [1]
> which uses the SOPHGO SG2000 SoC.
> 
> Link: https://milkv.io/duo-s [1]
> 
> Signed-off-by: Joshua Milas <josh.milas@gmail.com>

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>

Best regards,
Krzysztof

Re: [PATCH v5 3/5] dt-bindings: soc: sophgo: add sg2000 plic and clint documentation

[Krzysztof Kozlowski]

On Fri, Apr 03, 2026 at 07:15:14AM -0400, Joshua Milas wrote:
> Document the compatible strings for the sg2000 interrupt
> controller and timer.
> 
> Signed-off-by: Joshua Milas <josh.milas@gmail.com>
> ---
>  .../bindings/interrupt-controller/sifive,plic-1.0.0.yaml         | 1 +
>  Documentation/devicetree/bindings/timer/sifive,clint.yaml        | 1 +
>  2 files changed, 2 insertions(+)

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>

Best regards,
Krzysztof