linux-kernel - [PATCH v3 2/2] riscv: dts: spacemit: add MusePi Pro board device tree

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Message-Id: <20251017-k1-musepi-pro-dts-v3-2-40b05491699f@linux.spacemit.com>
Date: Fri, 17 Oct 2025 13:52:26 +0800
From: Troy Mitchell <troy.mitchell@...ux.spacemit.com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Yixun Lan <dlan@...too.org>, 
 Paul Walmsley <paul.walmsley@...ive.com>, 
 Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
 Alexandre Ghiti <alex@...ti.fr>, Yangyu Chen <cyy@...self.name>
Cc: devicetree@...r.kernel.org, linux-riscv@...ts.infradead.org, 
 spacemit@...ts.linux.dev, linux-kernel@...r.kernel.org, 
 Troy Mitchell <troy.mitchell@...ux.spacemit.com>
Subject: [PATCH v3 2/2] riscv: dts: spacemit: add MusePi Pro board device
 tree

Add initial device tree support for the MusePi Pro board [1].
The board is using the SpacemiT K1/M1 SoC.

The device tree is adapted from the SpacemiT vendor tree [2].

Here's a refined list of its core features for consideration:
  - SoC: SpacemiT M1/K1, 8-core 64-bit RISC-V with 2.0 TOPS AI power.
         This suggests potential for light AI/ML workloads on-device.
  - Memory: LPDDR4X @ 2400MT/s, available in 8GB & 16GB options.
            Sufficient for various workloads.
  - Storage: Onboard eMMC 5.1 (64GB/128GB options). M.2 M-Key for NVMe
             SSD (2230 size), and a microSD slot (UHS-II) for expansion.
             Good variety for boot and data.
  - Display: HDMI 1.4 (1080P@...z) and 2-lane MIPI DSI FPC (1080P@...z).
             Standard display options.
  - Connectivity: Onboard Wi-Fi 6 & Bluetooth 5.2. A single Gigabit
                  Ethernet port (RJ45). Given the stated markets,
                  this should cover basic networking.
  - USB: 4x USB 3.0 Type-A (host) and 1x USB 2.0 Type-C (device/OTG).
         Decent host capabilities.
  - Expansion: Full-size miniPCIe slot for assorted modules
               (4G/5G, wireless etc.). A second M.2 M-Key (2230) for more
               general PCIe devices (SSD, PCIe-to-SATA, comm boards).
  - GPIO: Standard 40-pin GPIO interface, as expected for an SBC.
  - MIPI: Includes 1x 4-lane MIPI CSI FPC and 2x MIPI DSI FPC interfaces
          for cameras and displays.
  - Clock: Onboard RTC with battery support.

This minimal device tree enables booting into a serial console with UART
output and a blinking LED.

Link: https://developer.spacemit.com/documentation?token=YJtdwnvvViPVcmkoPDpcvwfVnrh&type=pdf [1]
Link: https://gitee.com/bianbu-linux/linux-6.6/blob/k1-bl-v2.2.y/arch/riscv/boot/dts/spacemit/k1-x_MUSE-Pi-Pro.dts [2]

Signed-off-by: Troy Mitchell <troy.mitchell@...ux.spacemit.com>
---
Changelog in v3:
- sort dts node
- add ethernet alias
- add emmc, pdma, and eth0 node (a squash of patches 3–5 from v2)
- Link to v2: https://lore.kernel.org/all/20251010-k1-musepi-pro-dts-v2-2-6e1b491f6f3e@linux.spacemit.com/

Changelog in v2:
- modify commit message
- swap pinctrl-names and pinctrl-0 properties in uart0 node
- rename model: "MusePi Pro" -> "SpacemiT MusePi Pro"
- keep the dtb-$(CONFIG_ARCH_SPACEMIT) entries in alphabetical order
- Link to v1: https://lore.kernel.org/all/20250928-k1-musepi-pro-dts-v1-2-5efcca0ce3ae@linux.spacemit.com/
---
 arch/riscv/boot/dts/spacemit/Makefile          |  1 +
 arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts | 78 ++++++++++++++++++++++++++
 2 files changed, 79 insertions(+)

diff --git a/arch/riscv/boot/dts/spacemit/Makefile b/arch/riscv/boot/dts/spacemit/Makefile
index 152832644870624d8fd77684ef33addb42b0baf3..942ecb38bea034ef5fbf2cef74e682ee0b6ad8f4 100644
--- a/arch/riscv/boot/dts/spacemit/Makefile
+++ b/arch/riscv/boot/dts/spacemit/Makefile
@@ -1,4 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0
 dtb-$(CONFIG_ARCH_SPACEMIT) += k1-bananapi-f3.dtb
 dtb-$(CONFIG_ARCH_SPACEMIT) += k1-milkv-jupiter.dtb
+dtb-$(CONFIG_ARCH_SPACEMIT) += k1-musepi-pro.dtb
 dtb-$(CONFIG_ARCH_SPACEMIT) += k1-orangepi-rv2.dtb
diff --git a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
new file mode 100644
index 0000000000000000000000000000000000000000..590c9bdbdfda4d6ddd97a96e10fcaef0a75f3390
--- /dev/null
+++ b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Copyright (C) 2024 Yangyu Chen <cyy@...self.name>
+ * Copyright (C) 2025 Troy Mitchell <troy.mitchell@...ux.spacemit.com>
+ */
+
+/dts-v1/;
+
+#include "k1.dtsi"
+#include "k1-pinctrl.dtsi"
+
+/ {
+	model = "SpacemiT MusePi Pro";
+	compatible = "spacemit,musepi-pro", "spacemit,k1";
+
+	aliases {
+		ethernet0 = &eth0;
+		serial0 = &uart0;
+	};
+
+	chosen {
+		stdout-path = "serial0";
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led1 {
+			label = "sys-led";
+			gpios = <&gpio K1_GPIO(96) GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "heartbeat";
+			default-state = "on";
+		};
+	};
+};
+
+&emmc {
+	bus-width = <8>;
+	mmc-hs400-1_8v;
+	mmc-hs400-enhanced-strobe;
+	non-removable;
+	no-sd;
+	no-sdio;
+	status = "okay";
+};
+
+&eth0 {
+	phy-handle = <&rgmii0>;
+	phy-mode = "rgmii-id";
+	pinctrl-0 = <&gmac0_cfg>;
+	pinctrl-names = "default";
+	rx-internal-delay-ps = <0>;
+	tx-internal-delay-ps = <0>;
+	status = "okay";
+
+	mdio-bus {
+		#address-cells = <0x1>;
+		#size-cells = <0x0>;
+
+		reset-gpios = <&gpio K1_GPIO(110) GPIO_ACTIVE_LOW>;
+		reset-delay-us = <10000>;
+		reset-post-delay-us = <100000>;
+
+		rgmii0: phy@1 {
+			reg = <0x1>;
+		};
+	};
+};
+
+&pdma {
+	status = "okay";
+};
+
+&uart0 {
+	pinctrl-0 = <&uart0_2_cfg>;
+	pinctrl-names = "default";
+	status = "okay";
+};

-- 
2.51.0