Re: [PATCH 3/3] net: phy: at803x: add qca8081 fifo reset on the link down

[Jie Luo]

On 7/2/2023 12:21 AM, Andrew Lunn wrote:
> > Hi Andrew,
> > it is the PLL related registers, there is no PHY ID existed in MII register
> > 2, 3 of this block, so it can't be instantiated as the generic PHY device.
>
> Well, phylib is going to scan those ID registers, and if it finds
> something other than 0xffff 0xffff in those two ID registers it is
> going to think a PHY is there. And then if there is no driver using
> that ID, it will instantiate a generic PHY.
>
> You might be able to see this in /sys/bus/mdio_bus, especially if you
> don't have a DT node representing the MDIO bus.
>
>        Andrew
Okay, understand it. thanks Andrew for pointing this.
i will check it.