Pointers on PHY reset via GPIO

→ For boards which require a PHY reset via GPIO, please see the generic framework provisions here: https://github.com/Xilinx/linux-xlnx/blob/master/Documentation/devicetree/bindings/net/ethernet-phy.yaml#L141

This can be used for multiple PHYs with independent GPIO resets as well.

→ If reset is required before PHY detection, please see the MDIO bus provision here: https://github.com/Xilinx/linux-xlnx/blob/master/Documentation/devicetree/bindings/net/mdio.yaml#L30

→ When using PHY reset via GPIO, please check manufacturer specific datasheet for the reset polarity, reset assert duration and post de-assert delay for PHY to be functional. These values can then be passed to PHY and MDIO framework via Devicetree documentation above.