TJA1120A RGMII Auto-Ethernet

vikyhre — Tue, 07 Apr 2026 08:52:44 GMT

We are working on TJA1120A RGMII Auto-Ethernet on our Custom Board based on TI AM62A7

Kindly help us with how to enable this interface on Yocto Linux

We have tried following DTS node format as in https://github.com/torvalds/linux/blob/master/Documentation/devicetree/bindings/net/nxp%2Ctja11xx.yaml

But driver didnt probe on Kernel dmesg

We understand that this PHY has vendor ID D001B:B031

We have also enabled CONFIG_NXP_TJA11XX_PHY in kernel config CONFIG_NXP_C45_TJA11XX_PHY

Re: TJA1120A RGMII Auto-Ethernet

PavelL — Wed, 08 Apr 2026 07:04:43 GMT

Hello @vikyhre ,

To narrow this down, could you please share:

1) Does U-Boot detect the PHY on the MDIO bus at the expected address? (e.g. output of “mdio list” / “mii info”)
2) Please share the relevant DTS snippets for the CPSW port node and the MDIO/PHY node (phy-handle, phy-mode, PHY reg/address), plus the boot log lines related to MDIO/PHY init:
dmesg | egrep -i "mdio|cpsw|phy|tja|nxp"

With these two items we can quickly determine whether the PHY is not visible on MDIO (HW/pinmux/reset/address) or if it’s a DT binding/reference issue.

Best regards,

Pavel

Other NXP ProductsのトピックRe: TJA1120A RGMII Auto-Ethernet

TJA1120A RGMII Auto-Ethernet

Re: TJA1120A RGMII Auto-Ethernet