[PATCH v7 0/2] ARM: dts: aspeed: Add ASRock Rack B650D4U BMC support

[PATCH v7 0/2] ARM: dts: aspeed: Add ASRock Rack B650D4U BMC support

[Prasanth Kumar Padarthi]

Add support for the ASRock Rack B650D4U BMC, based on the ASPEED AST2600 SoC.

The series adds the board compatible string and describes the BMC memory, SPI NOR flash layout, UART console, GPIO line names, graphics reserved memory, I2C EEPROM, and MAC0 connected to an RTL8211F Ethernet PHY.

MAC0 obtains its MAC address from the EEPROM on I2C7 and uses RGMII-ID mode.

Changes in v7:

* Correct the GPIOP bank line names for the reset, power and NMI button/control signals according to the confirmed board mapping.
* Remove the obsolete GPIOF5 reset-button line name.
* Leave the binding patch unchanged.

The B650D4U DTB builds successfully using aspeed_g5_defconfig.

Prasanth Kumar Padarthi (2):
  dt-bindings: arm: aspeed: Add ASRock Rack B650D4U
  ARM: dts: aspeed: Add ASRock Rack B650D4U BMC

 .../bindings/arm/aspeed/aspeed.yaml           |   1 +
 arch/arm/boot/dts/aspeed/Makefile             |   1 +
 .../dts/aspeed/aspeed-bmc-asrock-b650d4u.dts  | 135 ++++++++++++++++++
 3 files changed, 137 insertions(+)
 create mode 100644 arch/arm/boot/dts/aspeed/aspeed-bmc-asrock-b650d4u.dts

-- 
2.47.3

[PATCH v7 1/2] dt-bindings: arm: aspeed: Add ASRock Rack B650D4U

[Prasanth Kumar Padarthi]

Add the compatible string for the ASRock Rack B650D4U BMC,
which is an AST2600-based server motherboard.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Prasanth Kumar Padarthi <prasanth.padarthi10@gmail.com>
---
 Documentation/devicetree/bindings/arm/aspeed/aspeed.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/arm/aspeed/aspeed.yaml b/Documentation/devicetree/bindings/arm/aspeed/aspeed.yaml
index 9ba195b8f22d..4c9e96801c1a 100644
--- a/Documentation/devicetree/bindings/arm/aspeed/aspeed.yaml
+++ b/Documentation/devicetree/bindings/arm/aspeed/aspeed.yaml
@@ -81,6 +81,7 @@ properties:
               - ampere,mtmitchell-bmc
               - aspeed,ast2600-evb
               - aspeed,ast2600-evb-a1
+              - asrock,b650d4u-bmc
               - asus,ast2600-kommando-ipmi-card
               - asus,x4tf-bmc
               - facebook,anacapa-bmc
-- 
2.47.3

[PATCH v7 2/2] ARM: dts: aspeed: Add ASRock Rack B650D4U BMC

[Prasanth Kumar Padarthi]

Add the device tree for the ASRock Rack B650D4U BMC, which is
based on the ASPEED AST2600 SoC.

Describe the BMC memory, SPI NOR flash layout, UART console,
GPIO line names, video framebuffer memory, I2C EEPROM, and MAC0
connected to an RTL8211F Ethernet PHY.

Use the EEPROM on I2C7 as the NVMEM provider for the MAC0 address.

Configure MAC0 to use the RTL8211F in RGMII-ID mode.

Signed-off-by: Prasanth Kumar Padarthi <prasanth.padarthi10@gmail.com>
---
 arch/arm/boot/dts/aspeed/Makefile             |   1 +
 .../dts/aspeed/aspeed-bmc-asrock-b650d4u.dts  | 135 ++++++++++++++++++
 2 files changed, 136 insertions(+)
 create mode 100644 arch/arm/boot/dts/aspeed/aspeed-bmc-asrock-b650d4u.dts

diff --git a/arch/arm/boot/dts/aspeed/Makefile b/arch/arm/boot/dts/aspeed/Makefile
index 6b68671f9379..b109491d5c8f 100644
--- a/arch/arm/boot/dts/aspeed/Makefile
+++ b/arch/arm/boot/dts/aspeed/Makefile
@@ -10,6 +10,7 @@ dtb-$(CONFIG_ARCH_ASPEED) += \
 	aspeed-bmc-ampere-mtmitchell.dtb \
 	aspeed-bmc-arm-stardragon4800-rep2.dtb \
 	aspeed-bmc-asrock-altrad8.dtb \
+	aspeed-bmc-asrock-b650d4u.dtb \
 	aspeed-bmc-asrock-e3c246d4i.dtb \
 	aspeed-bmc-asrock-e3c256d4i.dtb \
 	aspeed-bmc-asrock-paul-ipmi-card.dtb \
diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-asrock-b650d4u.dts b/arch/arm/boot/dts/aspeed/aspeed-bmc-asrock-b650d4u.dts
new file mode 100644
index 000000000000..a4e384588a54
--- /dev/null
+++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-asrock-b650d4u.dts
@@ -0,0 +1,135 @@
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+
+#include "aspeed-g6.dtsi"
+
+/ {
+	compatible = "asrock,b650d4u-bmc", "aspeed,ast2600";
+	model = "ASRock Rack B650D4U BMC";
+
+	aliases {
+		serial0 = &uart5;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	memory@80000000 {
+		device_type = "memory";
+		reg = <0x80000000 0x20000000>;
+	};
+
+	reserved-memory {
+		ranges;
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		gfx_memory: framebuffer {
+			compatible = "shared-dma-pool";
+			alignment = <0x01000000>;
+			reusable;
+			size = <0x01000000>;
+		};
+	};
+};
+
+&fmc {
+	status = "okay";
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		label = "bmc";
+		spi-max-frequency = <50000000>;
+		spi-rx-bus-width = <4>;
+		m25p,fast-read;
+
+		status = "okay";
+
+#include "openbmc-flash-layout-64.dtsi"
+	};
+};
+
+&gfx {
+	memory-region = <&gfx_memory>;
+
+	status = "okay";
+};
+
+&gpio0 {
+	gpio-line-names =
+		/* A0-A7 */	"","","","","","","","",
+		/* B0-B7 */	"","","","","","","","",
+		/* C0-C7 */	"","","","","","","","",
+		/* D0-D7 */	"","","","","","","","",
+		/* E0-E7 */	"","","","","","","","",
+		/* F0-F7 */	"","","","","","","","",
+		/* G0-G7 */	"","","","","","","","",
+		/* H0-H7 */	"","","","","","","","",
+		/* I0-I7 */	"","","","","","","","",
+		/* J0-J7 */	"","","","","","","","",
+		/* K0-K7 */	"","","","","","","","",
+		/* L0-L7 */	"","","","","","","","",
+		/* M0-M7 */	"","","","","","","","",
+		/* N0-N7 */	"","","","","","","","",
+		/* O0-O7 */	"","","","","","","","",
+		/* P0-P7 */	"button-reset-n","control-reset-n",
+		"button-power-n","control-power-n",
+		"button-nmi-n","control-nmi-n",
+		"","",
+		/* Q0-Q7 */	"","","","","","","","",
+		/* R0-R7 */	"","","","","","","","",
+		/* S0-S7 */	"","","","","","","","",
+		/* T0-T7 */	"","","","","","","","",
+		/* U0-U7 */	"","","","","","","","",
+		/* V0-V7 */	"","","","","","","","",
+		/* W0-W7 */	"","","","","","","","",
+		/* X0-X7 */	"","","","","","","","",
+		/* Y0-Y7 */	"","","","","","","","",
+		/* Z0-Z7 */	"","","","","","","","";
+};
+
+&i2c7 {
+	status = "okay";
+
+	eeprom@57 {
+		compatible = "atmel,24c128";
+		reg = <0x57>;
+		pagesize = <16>;
+
+		nvmem-layout {
+			compatible = "fixed-layout";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			eth0_macaddress: macaddress@3f80 {
+				reg = <0x3f80 6>;
+			};
+		};
+	};
+};
+
+&mac0 {
+	nvmem-cells = <&eth0_macaddress>;
+	nvmem-cell-names = "mac-address";
+	phy-handle = <&ethphy0>;
+	phy-mode = "rgmii-id";
+	pinctrl-0 = <&pinctrl_rgmii1_default>;
+	pinctrl-names = "default";
+
+	status = "okay";
+};
+
+&mdio0 {
+	status = "okay";
+
+	ethphy0: ethernet-phy@0 {
+		compatible = "ethernet-phy-ieee802.3-c22";
+		reg = <0>;
+	};
+};
+
+&uart5 {
+	status = "okay";
+};
-- 
2.47.3

Re: [PATCH v7 2/2] ARM: dts: aspeed: Add ASRock Rack B650D4U BMC

[Andrew Lunn]

> +&mac0 {
> +	nvmem-cells = <&eth0_macaddress>;
> +	nvmem-cell-names = "mac-address";
> +	phy-handle = <&ethphy0>;
> +	phy-mode = "rgmii-id";
> +	pinctrl-0 = <&pinctrl_rgmii1_default>;
> +	pinctrl-names = "default";
> +
> +	status = "okay";
> +};
> +
> +&mdio0 {
> +	status = "okay";
> +
> +	ethphy0: ethernet-phy@0 {
> +		compatible = "ethernet-phy-ieee802.3-c22";
> +		reg = <0>;
> +	};
> +};

For these nodes only:

Reviewed-by: Andrew Lunn <andrew@lunn.ch>

    Andrew

Re: [PATCH v7 2/2] ARM: dts: aspeed: Add ASRock Rack B650D4U BMC

[Tan Siewert]

> Add the device tree for the ASRock Rack B650D4U BMC, which is
> based on the ASPEED AST2600 SoC.
> 
> Describe the BMC memory, SPI NOR flash layout, UART console,
> GPIO line names, video framebuffer memory, I2C EEPROM, and MAC0
> connected to an RTL8211F Ethernet PHY.
> 
> Use the EEPROM on I2C7 as the NVMEM provider for the MAC0 address.
> 
> Configure MAC0 to use the RTL8211F in RGMII-ID mode.
> 
> Signed-off-by: Prasanth Kumar Padarthi <prasanth.padarthi10@gmail.com>
>

*snip*

> diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-asrock-b650d4u.dts b/arch/arm/boot/dts/aspeed/aspeed-bmc-asrock-b650d4u.dts
> new file mode 100644
> index 000000000000..a4e384588a54
> --- /dev/null
> +++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-asrock-b650d4u.dts

*snip*

> +&gpio0 {
> +	gpio-line-names =
> +		/* A0-A7 */	"","","","","","","","",
> +		/* B0-B7 */	"","","","","","","","",
> +		/* C0-C7 */	"","","","","","","","",
> +		/* D0-D7 */	"","","","","","","","",
> +		/* E0-E7 */	"","","","","","","","",
> +		/* F0-F7 */	"","","","","","","","",
> +		/* G0-G7 */	"","","","","","","","",
> +		/* H0-H7 */	"","","","","","","","",
> +		/* I0-I7 */	"","","","","","","","",
> +		/* J0-J7 */	"","","","","","","","",
> +		/* K0-K7 */	"","","","","","","","",
> +		/* L0-L7 */	"","","","","","","","",
> +		/* M0-M7 */	"","","","","","","","",
> +		/* N0-N7 */	"","","","","","","","",
> +		/* O0-O7 */	"","","","","","","","",
> +		/* P0-P7 */	"button-reset-n","control-reset-n",
> +		"button-power-n","control-power-n",
> +		"button-nmi-n","control-nmi-n",
> +		"","",

Nit: indentation.

Other than that:

Reviewed-by: Tan Siewert <tan.siewert@9elements.com>

-- 
Tan Siewert <tan.siewert@9elements.com>

Re: [PATCH v7 2/2] ARM: dts: aspeed: Add ASRock Rack B650D4U BMC

[Prasanth]

Hi Tan,

Thank you for the review.

I have successfully rebuilt the B650D4U DTB using multi_v7_defconfig,
with CONFIG_ARCH_ASPEED=y and CONFIG_MACH_ASPEED_G6=y.

I'll correct the GPIOP indentation and retain the review trailers if
another revision is needed.

Thanks,
Prasanth

On Tue, Sep 22, 2026 at 6:58 PM Tan Siewert <tan.siewert@9elements.com> wrote:
>
> > Add the device tree for the ASRock Rack B650D4U BMC, which is
> > based on the ASPEED AST2600 SoC.
> >
> > Describe the BMC memory, SPI NOR flash layout, UART console,
> > GPIO line names, video framebuffer memory, I2C EEPROM, and MAC0
> > connected to an RTL8211F Ethernet PHY.
> >
> > Use the EEPROM on I2C7 as the NVMEM provider for the MAC0 address.
> >
> > Configure MAC0 to use the RTL8211F in RGMII-ID mode.
> >
> > Signed-off-by: Prasanth Kumar Padarthi <prasanth.padarthi10@gmail.com>
> >
>
> *snip*
>
> > diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-asrock-b650d4u.dts b/arch/arm/boot/dts/aspeed/aspeed-bmc-asrock-b650d4u.dts
> > new file mode 100644
> > index 000000000000..a4e384588a54
> > --- /dev/null
> > +++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-asrock-b650d4u.dts
>
> *snip*
>
> > +&gpio0 {
> > +     gpio-line-names =
> > +             /* A0-A7 */     "","","","","","","","",
> > +             /* B0-B7 */     "","","","","","","","",
> > +             /* C0-C7 */     "","","","","","","","",
> > +             /* D0-D7 */     "","","","","","","","",
> > +             /* E0-E7 */     "","","","","","","","",
> > +             /* F0-F7 */     "","","","","","","","",
> > +             /* G0-G7 */     "","","","","","","","",
> > +             /* H0-H7 */     "","","","","","","","",
> > +             /* I0-I7 */     "","","","","","","","",
> > +             /* J0-J7 */     "","","","","","","","",
> > +             /* K0-K7 */     "","","","","","","","",
> > +             /* L0-L7 */     "","","","","","","","",
> > +             /* M0-M7 */     "","","","","","","","",
> > +             /* N0-N7 */     "","","","","","","","",
> > +             /* O0-O7 */     "","","","","","","","",
> > +             /* P0-P7 */     "button-reset-n","control-reset-n",
> > +             "button-power-n","control-power-n",
> > +             "button-nmi-n","control-nmi-n",
> > +             "","",
>
> Nit: indentation.
>
> Other than that:
>
> Reviewed-by: Tan Siewert <tan.siewert@9elements.com>
>
> --
> Tan Siewert <tan.siewert@9elements.com>

Re: [PATCH v7 0/2] ARM: dts: aspeed: Add ASRock Rack B650D4U BMC support

[Tan Siewert]

On 9/22/26 2:34 PM, Prasanth Kumar Padarthi wrote:
> Add support for the ASRock Rack B650D4U BMC, based on the ASPEED AST2600 SoC.
> 
> The series adds the board compatible string and describes the BMC memory, SPI NOR flash layout, UART console, GPIO line names, graphics reserved memory, I2C EEPROM, and MAC0 connected to an RTL8211F Ethernet PHY.
> 
> MAC0 obtains its MAC address from the EEPROM on I2C7 and uses RGMII-ID mode.
> 
> Changes in v7:
> 
> * Correct the GPIOP bank line names for the reset, power and NMI button/control signals according to the confirmed board mapping.
> * Remove the obsolete GPIOF5 reset-button line name.
> * Leave the binding patch unchanged.
> 
> The B650D4U DTB builds successfully using aspeed_g5_defconfig.

What? The B650D4U has an AST2600, so using `aspeed_g5_defconfig` means 
you're using a config set for the AST2*5*00...

Also, please preserve the trailers from previous serieses (i.e. Andrew's 
Reviewed-by trailer) if you don't change anything significantly for the 
parts that got reviewed.

Tan

Re: [PATCH v7 0/2] ARM: dts: aspeed: Add ASRock Rack B650D4U BMC support

[Prasanth]

Hi Tan,

Thank you for catching these issues.

You're correct about the defconfig. I used `aspeed_g5_defconfig` for
the DTB build and incorrectly reported it as validation for the
AST2600. I'll rebuild using the appropriate AST2600 configuration and
correct the statement in the next revision.

I'll also carry forward Andrew's Reviewed-by trailer for the unchanged
MAC0 and MDIO nodes, preserving the scope of his review.

Thanks,
Prasanth

On Tue, Sep 22, 2026 at 6:51 PM Tan Siewert <tan.siewert@9elements.com> wrote:
>
> On 9/22/26 2:34 PM, Prasanth Kumar Padarthi wrote:
> > Add support for the ASRock Rack B650D4U BMC, based on the ASPEED AST2600 SoC.
> >
> > The series adds the board compatible string and describes the BMC memory, SPI NOR flash layout, UART console, GPIO line names, graphics reserved memory, I2C EEPROM, and MAC0 connected to an RTL8211F Ethernet PHY.
> >
> > MAC0 obtains its MAC address from the EEPROM on I2C7 and uses RGMII-ID mode.
> >
> > Changes in v7:
> >
> > * Correct the GPIOP bank line names for the reset, power and NMI button/control signals according to the confirmed board mapping.
> > * Remove the obsolete GPIOF5 reset-button line name.
> > * Leave the binding patch unchanged.
> >
> > The B650D4U DTB builds successfully using aspeed_g5_defconfig.
>
> What? The B650D4U has an AST2600, so using `aspeed_g5_defconfig` means
> you're using a config set for the AST2*5*00...
>
> Also, please preserve the trailers from previous serieses (i.e. Andrew's
> Reviewed-by trailer) if you don't change anything significantly for the
> parts that got reviewed.
>
> Tan

Re: [PATCH v7 0/2] ARM: dts: aspeed: Add ASRock Rack B650D4U BMC support

[Tan Siewert]

On 9/22/26 3:26 PM, Prasanth wrote:
> Hi Tan,
> 
> Thank you for catching these issues.
> 
> You're correct about the defconfig. I used `aspeed_g5_defconfig` for
> the DTB build and incorrectly reported it as validation for the
> AST2600. I'll rebuild using the appropriate AST2600 configuration and
> correct the statement in the next revision.
> 
> I'll also carry forward Andrew's Reviewed-by trailer for the unchanged
> MAC0 and MDIO nodes, preserving the scope of his review.

Andrew has already resent the trailer, so no need to send another 
revision for that.

Tan