[PATCH v8 2/2] ARM: dts: aspeed: Add ASRock Rack B650D4U BMC

[Prasanth]

Hi,

A gentle follow-up on the B650D4U BMC device-tree series posted on October 2.

Could you please let me know whether any further changes or validation
are needed before this series can be picked up?

Thanks,
Prasanth

On Fri, Oct 2, 2026 at 11:59 AM Prasanth Kumar Padarthi
<prasanth.padarthi10 at gmail.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.
>
> Reviewed-by: Andrew Lunn <andrew at lunn.ch> # MAC0 and MDIO nodes only
> Signed-off-by: Prasanth Kumar Padarthi <prasanth.padarthi10 at 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 at 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 at 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 at 57 {
> +               compatible = "atmel,24c128";
> +               reg = <0x57>;
> +               pagesize = <16>;
> +
> +               nvmem-layout {
> +                       compatible = "fixed-layout";
> +                       #address-cells = <1>;
> +                       #size-cells = <1>;
> +
> +                       eth0_macaddress: macaddress at 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 at 0 {
> +               compatible = "ethernet-phy-ieee802.3-c22";
> +               reg = <0>;
> +       };
> +};
> +
> +&uart5 {
> +       status = "okay";
> +};
> --
> 2.47.3
>