[PATCH v4 0/2] riscv: dts: spacemit: add initial support for MusePi Pro

[PATCH v4 0/2] riscv: dts: spacemit: add initial support for MusePi Pro

[Troy Mitchell]

This patchset adds initial device tree support for the MusePi Pro board.

Muse Pi Pro [1] is a single-board computer integrating a high-performance
RISC-V 8-core processor, storage, I/O and expansion capabilities into
a credit card-sized 1.8-inch board.

Link:
https://developer.spacemit.com/documentation?token=YJtdwnvvViPVcmkoPDpcvwfVnrh&type=pdf
[1]

Signed-off-by: Troy Mitchell <troy.mitchell@linux.spacemit.com>
---
Troy Mitchell (2):
      dt-bindings: riscv: spacemit: add MusePi Pro board
      riscv: dts: spacemit: add MusePi Pro board device tree

 .../devicetree/bindings/riscv/spacemit.yaml        |  1 +
 arch/riscv/boot/dts/spacemit/Makefile              |  1 +
 arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts     | 79 ++++++++++++++++++++++
 3 files changed, 81 insertions(+)
---
base-commit: 6296cd4c05cbcf06725777ded1ef44ab987a9cfd
change-id: 20250928-k1-musepi-pro-dts-546d20c442ab

Best regards,
-- 
Troy Mitchell <troy.mitchell@linux.spacemit.com>


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[PATCH v4 1/2] dt-bindings: riscv: spacemit: add MusePi Pro board

[Troy Mitchell]

Document the compatible string for the MusePi Pro [1]. It is a 1.8-inch
single board computer based on the SpacemiT K1/M1 RISC-V SoC [2].

Here's a refined list of its core features:
  - SoC: SpacemiT M1/K1, 8-core 64-bit RISC-V.
  - Memory: LPDDR4X @ 2400MT/s, available in 8GB & 16GB options.
  - 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.
  - Display: HDMI 1.4 (1080P@60Hz) and 2-lane MIPI DSI FPC (1080P@60Hz).
  - Connectivity: Onboard Wi-Fi 6 & Bluetooth 5.2, single Gigabit Ethernet
                  port (RJ45).
  - USB: 4x USB 3.0 Type-A (host) and 1x USB 2.0 Type-C (device/OTG).
  - Expansion: Full-size miniPCIe slot and a second M.2 M-Key (2230).
  - GPIO: Standard 40-pin GPIO interface.
  - MIPI: 1x 4-lane MIPI CSI FPC and 2x MIPI DSI FPC interfaces.
  - Clock: Onboard RTC with battery support.

Link: https://developer.spacemit.com/documentation?token=YJtdwnvvViPVcmkoPDpcvwfVnrh&type=pdf [1]
Link: https://www.spacemit.com/en/key-stone-k1 [2]
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Troy Mitchell <troy.mitchell@linux.spacemit.com>
---
Changelog in v4:
- modify commit message
- Link to v3: https://lore.kernel.org/all/20251017-k1-musepi-pro-dts-v3-1-40b05491699f@linux.spacemit.com/

Changelog in v3:
- nothing
- Link to v2: https://lore.kernel.org/all/20251010-k1-musepi-pro-dts-v2-1-6e1b491f6f3e@linux.spacemit.com/

Changelog in v2:
- modify commit message
- Link to v1: https://lore.kernel.org/all/20250928-k1-musepi-pro-dts-v1-1-5efcca0ce3ae@linux.spacemit.com/
---
 Documentation/devicetree/bindings/riscv/spacemit.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/riscv/spacemit.yaml b/Documentation/devicetree/bindings/riscv/spacemit.yaml
index c56b62a6299ac24d3cdef7edcdfc407dc62a1846..52fe39296031f21d1c28c4f1ea5ca9fe28caf45a 100644
--- a/Documentation/devicetree/bindings/riscv/spacemit.yaml
+++ b/Documentation/devicetree/bindings/riscv/spacemit.yaml
@@ -22,6 +22,7 @@ properties:
           - enum:
               - bananapi,bpi-f3
               - milkv,jupiter
+              - spacemit,musepi-pro
               - xunlong,orangepi-rv2
           - const: spacemit,k1
 

-- 
2.51.1


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[PATCH v4 2/2] riscv: dts: spacemit: add MusePi Pro board device tree

[Troy Mitchell]

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

This device tree is adapted from the SpacemiT vendor tree [2] and
enables basic board functionality, including UART console, LED, eMMC,
Ethernet, and PDMA.

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@linux.spacemit.com>
---
Changelog in v4:
- modify commit message
- add SpacemiT copyright
- Link to v3: https://lore.kernel.org/all/20251017-k1-musepi-pro-dts-v3-2-40b05491699f@linux.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 | 79 ++++++++++++++++++++++++++
 2 files changed, 80 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..29e333b670cf0a5c4ed852668460db475b9c44cb
--- /dev/null
+++ b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
@@ -0,0 +1,79 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Copyright (C) 2024 Yangyu Chen <cyy@cyyself.name>
+ * Copyright (C) 2025 SpacemiT, Inc
+ * Copyright (C) 2025 Troy Mitchell <troy.mitchell@linux.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";
+};

-- 
2.51.1


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Re: [PATCH v4 2/2] riscv: dts: spacemit: add MusePi Pro board device tree

[E Shattow]

On 10/23/25 00:28, Troy Mitchell wrote:
> Add initial device tree support for the MusePi Pro board [1].
> The board is using the SpacemiT K1/M1 SoC.
> 
> This device tree is adapted from the SpacemiT vendor tree [2] and
> enables basic board functionality, including UART console, LED, eMMC,
> Ethernet, and PDMA.
> 
> 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@linux.spacemit.com>
> ---
> Changelog in v4:
> - modify commit message
> - add SpacemiT copyright
> - Link to v3: https://lore.kernel.org/all/20251017-k1-musepi-pro-dts-v3-2-40b05491699f@linux.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-$(CONFIG_ARCH_SPACEMIT) entries in alphabetical order
> - Link to v1: https://lore.kernel.org/all/20250928-k1-musepi-pro-dts-v1-2-5efcca0ce3ae@linux.spacemit.com/
> ---
>  arch/riscv/boot/dts/spacemit/Makefile          |  1 +
>  arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts | 79 ++++++++++++++++++++++++++
>  2 files changed, 80 insertions(+)
> 
> diff --git a/arch/riscv/boot/dts/spacemit/Makefile b/arch/riscv/boot/dts/spacemit/Makefile
> index 152832644870624d8fd77684ef33addb42b0baf3..942ecb38bea034ef5fbf2cef74e682ee0b6ad8f4 100644
> --- a/arch/riscv/boot/dts/spacemit/Makefile
> +++ b/arch/riscv/boot/dts/spacemit/Makefile
> @@ -1,4 +1,5 @@
>  # SPDX-License-Identifier: GPL-2.0
>  dtb-$(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..29e333b670cf0a5c4ed852668460db475b9c44cb
> --- /dev/null
> +++ b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
> @@ -0,0 +1,79 @@
> +// SPDX-License-Identifier: (GPL-2.0 OR MIT)
> +/*
> + * Copyright (C) 2024 Yangyu Chen <cyy@cyyself.name>
> + * Copyright (C) 2025 SpacemiT, Inc
> + * Copyright (C) 2025 Troy Mitchell <troy.mitchell@linux.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;

I doubt very much that 'no-sd' or 'no-sdio' are appropriate here. These
are not general properties, they are useful only for specific
workarounds of hardware that reacts badly to commands. Is the hardware
broken that it needs these properties?

-E

> +	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";
> +};
> 


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Re: [PATCH v4 2/2] riscv: dts: spacemit: add MusePi Pro board device tree

[Troy Mitchell]

On Thu, Oct 23, 2025 at 04:53:53AM -0700, E Shattow wrote:
> On 10/23/25 00:28, Troy Mitchell wrote:
> > Add initial device tree support for the MusePi Pro board [1].
> > The board is using the SpacemiT K1/M1 SoC.
> > 
> > This device tree is adapted from the SpacemiT vendor tree [2] and
> > enables basic board functionality, including UART console, LED, eMMC,
> > Ethernet, and PDMA.
> > 
> > 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@linux.spacemit.com>
> > ---
> > Changelog in v4:
> > - modify commit message
> > - add SpacemiT copyright
> > - Link to v3: https://lore.kernel.org/all/20251017-k1-musepi-pro-dts-v3-2-40b05491699f@linux.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-$(CONFIG_ARCH_SPACEMIT) entries in alphabetical order
> > - Link to v1: https://lore.kernel.org/all/20250928-k1-musepi-pro-dts-v1-2-5efcca0ce3ae@linux.spacemit.com/
> > ---
> >  arch/riscv/boot/dts/spacemit/Makefile          |  1 +
> >  arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts | 79 ++++++++++++++++++++++++++
> >  2 files changed, 80 insertions(+)
> > 
> > diff --git a/arch/riscv/boot/dts/spacemit/Makefile b/arch/riscv/boot/dts/spacemit/Makefile
> > index 152832644870624d8fd77684ef33addb42b0baf3..942ecb38bea034ef5fbf2cef74e682ee0b6ad8f4 100644
> > --- a/arch/riscv/boot/dts/spacemit/Makefile
> > +++ b/arch/riscv/boot/dts/spacemit/Makefile
> > @@ -1,4 +1,5 @@
> >  # SPDX-License-Identifier: GPL-2.0
> >  dtb-$(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..29e333b670cf0a5c4ed852668460db475b9c44cb
> > --- /dev/null
> > +++ b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
> > @@ -0,0 +1,79 @@
> > +// SPDX-License-Identifier: (GPL-2.0 OR MIT)
> > +/*
> > + * Copyright (C) 2024 Yangyu Chen <cyy@cyyself.name>
> > + * Copyright (C) 2025 SpacemiT, Inc
> > + * Copyright (C) 2025 Troy Mitchell <troy.mitchell@linux.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;
> 
> I doubt very much that 'no-sd' or 'no-sdio' are appropriate here. These
> are not general properties, they are useful only for specific
> workarounds of hardware that reacts badly to commands. Is the hardware
> broken that it needs these properties?
Thanks for the review. The three slots actually have distinct hardware
capabilities:
  - Slot 1 supports SD/SDIO (1/4 bit) and dual I/O voltage domains (1.8 V and 3.3 V).
  - Slot 2 supports SDIO/eMMC (1/4 bit) but does not support dual voltage domains.
  - Slot 3 supports only eMMC (1/4/8 bit) and is the only slot with a PHY.

Because of these differences, we need to explicitly specify no-sd and no-sdio
for slot 3 to prevent the MMC core from probing unsupported functions.

These are not general workarounds --—they reflect the actual hardware
limitations of the slots.

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Re: [PATCH v4 0/2] riscv: dts: spacemit: add initial support for MusePi Pro

[Yixun Lan]

On Thu, 23 Oct 2025 15:28:28 +0800, Troy Mitchell wrote:
> This patchset adds initial device tree support for the MusePi Pro board.
> 
> Muse Pi Pro [1] is a single-board computer integrating a high-performance
> RISC-V 8-core processor, storage, I/O and expansion capabilities into
> a credit card-sized 1.8-inch board.
> 
> Link:
> https://developer.spacemit.com/documentation?token=YJtdwnvvViPVcmkoPDpcvwfVnrh&type=pdf
> [1]
> 
> [...]

Applied, thanks!

[1/2] dt-bindings: riscv: spacemit: add MusePi Pro board
      https://github.com/spacemit-com/linux/commit/2cc22890635ded33856e2761b780688f54a49393
[2/2] riscv: dts: spacemit: add MusePi Pro board device tree
      https://github.com/spacemit-com/linux/commit/0ee59934662dfb89b43a8392e64ac4880c2fca88

Best regards,
-- 
Yixun Lan


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