[PATCH v4 2/2] riscv: dts: sophgo: add initial Milk-V Duo S board support

michael.opdenacker
2024-04-17T06:46:55Z

This adds initial support for the Milk-V Duo S board
(https://milkv.io/duo-s), enabling the serial port and
SD card support, allowing to boot Linux to the command line.

Link: https://lore.kernel.org/linux-riscv/171266958507.1032617.9460749136730849811.robh@kernel.org/T/#t

Signed-off-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
---
arch/riscv/boot/dts/sophgo/Makefile | 1 +
.../boot/dts/sophgo/sg2000-milkv-duos.dts | 34 +++++++++++++++++++
2 files changed, 35 insertions(+)
create mode 100644 arch/riscv/boot/dts/sophgo/sg2000-milkv-duos.dts

diff --git a/arch/riscv/boot/dts/sophgo/Makefile b/arch/riscv/boot/dts/sophgo/Makefile
index 57ad82a61ea6..e008acb5240f 100644
--- a/arch/riscv/boot/dts/sophgo/Makefile
+++ b/arch/riscv/boot/dts/sophgo/Makefile
@@ -1,4 +1,5 @@
# SPDX-License-Identifier: GPL-2.0
dtb-$(CONFIG_ARCH_SOPHGO) += cv1800b-milkv-duo.dtb
dtb-$(CONFIG_ARCH_SOPHGO) += cv1812h-huashan-pi.dtb
+dtb-$(CONFIG_ARCH_SOPHGO) += sg2000-milkv-duos.dtb
dtb-$(CONFIG_ARCH_SOPHGO) += sg2042-milkv-pioneer.dtb
diff --git a/arch/riscv/boot/dts/sophgo/sg2000-milkv-duos.dts b/arch/riscv/boot/dts/sophgo/sg2000-milkv-duos.dts
new file mode 100644
index 000000000000..c1ecf97d5e93
--- /dev/null
+++ b/arch/riscv/boot/dts/sophgo/sg2000-milkv-duos.dts
@@ -0,0 +1,34 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Copyright (C) 2024 Michael Opdenacker <michael.opdenacker@bootlin.com>
+ */
+
+/dts-v1/;
+
+#include "cv1812h.dtsi"
+
+/ {
+ model = "Milk-V Duo S";
+ compatible = "milkv,duos", "sophgo,cv1812h";
+
+ aliases {
+ serial0 = &uart0;
+ };
+
+ chosen {
+ stdout-path = "serial0:115200n8";
+ };
+
+ memory@80000000 {
+ device_type = "memory";
+ reg = <0x80000000 0x20000000>;
+ };
+};
+
+&osc {
+ clock-frequency = <25000000>;
+};
+
+&uart0 {
+ status = "okay";
+};