NXP iMX8MM KSZ9031 PHY u-boot Problem

[FOC]

Hi Everyone,

I have a custom-made IMX8MM SOM and carrier board. I can compile u-boot-imx (lf_v2022_04) from scratch and generate flash.bin, but when I try to boot the SOM, a "Could not get PHY for FEC0: addr 0" error occurs, and U-Boot can't find the Ethernet PHY and MDIO bus. I can share the schematic and DTS file. I've attached the log file as well. I've also checked the external 1.2V regulator and crystal frequency.

Kind regards

[Bio_TICFSL]

Hello,

Please make sure that PHY Address is correctly set.

One can refer to fsl-imx8qm-mek.dts (u-boot dts ) and imx8qm-mek.dts (linux dts) for device tree configuration.

Please make sure that your board file in the /board directory contains proper initialization and resource allocation (pad , power domain ..) as done in /board/freescale/imx8qm_mek/imx8m

"FEC0: addr 0: ignoring dependency for device, assuming no driver"

above issue could arise due to device tree mismatch.

Please try using Latest BSP.

Regards