Hi,
when I understand the schematics of the STM32MP257-DK-board correct, the MDIO and MDC signals of the Ethernet1 interface are connected to some pins, which do NOT provide the MDIO and MDC functionality by default (AE15 which is PA10_ETH3_RGMII_RXD1 and where MDIO is function #5 at that pin and AF15 which is PA9_ETH3_RGMII_RXD0 and where MDIO is function #6 of that pin).
So in order to let STLinux on that DK-board be able to access the Ethernet interface, on an very early boot-stage the pins need to be configured to provide the related functions.
My question: when and where is this pinmux-configuration done exactly?
Thanks!
