Re: [PATCH net-next v1 2/3] dt-bindings: net: micrel: Add keep-preamble-before-sfd

[Stefan Eichenberger]

Hi Andrew,

On Wed, Dec 17, 2025 at 06:04:56PM +0100, Andrew Lunn wrote:
> > > I think the ideal implementation would be the MAC driver calling some 
> > > phy API to apply the quirk, and then that gets passed on to the phy 
> > > driver. Surely this isn't the first case of a MAC-PHY combination 
> > > needing to go fiddle with some special setting.
> > 
> > I was also hoping to find something like that, but I couldn't really
> > find it. However, I will try looking in that direction. At least we can
> > identify the broken MAC via the compatible string of the MAC driver, as
> > they use two different compatibles: 'fsl,imx8mp-fec' (fine) and
> > 'nxp,imx8mp-dwmac-eqos' (affected by the errata).
> 
> Maybe see if you can use phy_register_fixup_for_id().

That sounds really promising. Thanks a lot for the tip! I'll try to
address our problem by registering a fixup.

Regards,
Stefan