[PATCH 1/1] ARM: dts: aspeed: msx4: enable BMC networking via MAC0

[Andrew Jeffery]

On Tue, 2026-05-05 at 14:05 +0900, Ender Hsieh wrote:
> Add &mac0, &mdio3, and the ethphy3 PHY node to enable BMC networking
> on the AST2600-based NVIDIA MSX4 board. The PHY is attached to MDIO3
> at address 2 and uses RGMII with PHY-internal delays.
> 
> These nodes were intentionally omitted in commit f28674fab34f ("ARM:
> dts: aspeed: Add NVIDIA MSX4 HPM") at Andrew Lunn's request, pending
> clarification of the RGMII delay handling. Following his guidance on
> linux-aspeed, the bootloader has been modified to stop enabling MAC
> clock delays on the SoC side, so phy-mode = "rgmii-id" correctly
> results in the PHY adding the required ~2ns delay without any
> double-delay from the MAC controller.
> 
> The corresponding U-Boot change has been submitted to openbmc/u-boot.
> 
> Link: https://patch.msgid.link/eac09481-0ba1-4ac2-ad8c-d859822ff0d5@lunn.ch
> Link: https://patch.msgid.link/20260504044702.2613879-1-andhsieh@nvidia.com
> Cc: Andrew Lunn <andrew at lunn.ch>
> Cc: Marc Olberding <molberding at nvidia.com>
> Signed-off-by: Ender Hsieh <andhsieh at nvidia.com>
> ---
>  .../dts/aspeed/aspeed-bmc-nvidia-msx4-bmc.dts     | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 

I've applied this to the BMC tree. I've also applied the linked u-boot
patch to openbmc/u-boot, and backported this change to openbmc/linux.

Cheers,

Andrew