Add initial Milk-V Duo S board support

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 <[email protected]>

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

Signed-off-by Joshua Milas <[email protected]>

---
 .../bindings/interrupt-controller/sifive,plic-1.0.0.yaml         | 1 +
 Documentation/devicetree/bindings/timer/sifive,clint.yaml        | 1 +
 2 files changed, 2 insertions(+)

Adds sg2000.dtsi on the RISCV side.

Signed-off-by Joshua Milas <[email protected]>

---
 arch/riscv/boot/dts/sophgo/sg2000.dtsi | 53 ++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 arch/riscv/boot/dts/sophgo/sg2000.dtsi

arch/riscv/boot/dts/sophgo/sg2000.dtsi new file +53 -1

new file mode 100644
index 0000000000000..412adacc00576
@@ -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

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 <[email protected]>

---
 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

arch/riscv/boot/dts/sophgo/Makefile +1 -0

index 6f65526d4193b..58cc6b70d8de4 100644
@@ -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

arch/riscv/boot/dts/sophgo/sg2000-milkv-duo-s.dts new file +85 -1

new file mode 100644
index 0000000000000..8632470f43ab0
@@ -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

Quoted 6 lines · 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 <[email protected]>

Great work, thanks Joshua! I really like this board.

I encountered the same issue Michael Opdenacker saw in v4, but enabling the MDIO-related configs resolved it.

I'll keep using and testing this series and provide further feedback if anything comes up. Next, I plan to test the arm64 side and will also try developing an efuse driver.

Tested-by Gui-Dong Han <[email protected]>

Reviewed-by Gui-Dong Han <[email protected]>