esp wrover ethernet RMII clock slave no control PHY

[shooks999]

Hi esp team,
we have a project where esp is connected to an ethernet port of Marvell switch, the RMII clock is driven by the switch but, the switch, is not directly controlled by ESP (trought mdc & mdio) but by another uC on the board.
Since we don't control the switch directly, we made a simple logic to avoid "boot" problems on io0 boot pin with RMII clock.
The problem seem to be that ethenet examples need to control mdc & mdio.
Can you help us understanding what is need to cover the above use case?
Thank you.

[shooks999]

Anyone that have an ESP connected to ethernet switch without controlling it?