Hi Andrew,

On Thu, Jan 7, 2021 at 11:25 AM Andrew Lunn [off-list ref] wrote:

There are two different GPIO supported. There is the bus GPIO you have
found, which is intended to reset all devices on the MDIO bus.

And there is a per device GPIO reset and reset controller. However, in
order to use these, you need to be able to 'discover' the PHY,
potentially when the device is held in reset. Some devices will
respond to MDIO while held in reset, some don't. If you PHYs don't you
need to add a compatible of the form
ethernet-phy-id[a-f0-9]{4}\\.[a-f0-9]{4}$ with the PHY ID. The PHY
will then be probed, independent of if it can be found on the bus or
not, and that probing will enable the GPIO.

It works after following your suggestion :-)

I will submit the dts patches shortly.

Thanks a lot for your help, really appreciate it!