[PATCH v4 0/2] ARM: dts: aspeed: Add ASRock Rack B650D4U BMC

[Prasanth Kumar Padarthi <prasanth.padarthi10@gmail.com>]

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

The series adds the board compatible and describes the BMC memory,
SPI NOR flash layout, UART console, and MAC0 connected to an
RTL8211F Ethernet PHY.

The MAC0 RGMII timing configuration was validated on B650D4U
hardware. With plain "rgmii", the PHY negotiated 1000baseT/Full but
received no valid packets and accumulated RX CRC errors. With
"rgmii-rxid", a 5000-packet test completed with 0% packet loss and
no RX CRC errors. "rgmii-id" was also tested successfully, but the
additional TX delay is not required, so "rgmii-rxid" is retained.

Changes in v4:
- Validate the MAC0 RGMII timing configuration on B650D4U hardware.
- Keep phy-mode = "rgmii-rxid" based on hardware A/B testing.
- Add the SPI NOR fixed partition layout validated on B650D4U
  hardware.
- Correct the BMC memory size to 512 MiB.
- Order peripheral nodes alphabetically by label.

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  | 95 +++++++++++++++++++
 3 files changed, 97 insertions(+)
 create mode 100644 arch/arm/boot/dts/aspeed/aspeed-bmc-asrock-b650d4u.dts

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2.47.3