Re: [PATCH v2] net: macb: do not scan PHYs manually

Josh Cartwright
2016-04-28T21:04:11Z

[-- Attachment #1: Type: text/plain, Size: 1410 bytes --]

On Thu, Apr 28, 2016 at 08:59:32PM +0200, Andrew Lunn wrote:
> On Thu, Apr 28, 2016 at 01:55:27PM -0500, Nathan Sullivan wrote:
> > On Thu, Apr 28, 2016 at 08:43:03PM +0200, Andrew Lunn wrote:
> > > > I agree that is a valid fix for AT91, however it won't solve our problem, since
> > > > we have no children on the second ethernet MAC in our devices' device trees. I'm
> > > > starting to feel like our second MAC shouldn't even really register the MDIO bus
> > > > since it isn't being used - maybe adding a DT property to not have a bus is a
> > > > better option?
> > >
> > > status = "disabled"
> > >
> > > would be the unusual way.
> > >
> > > Andrew
> >
> > Oh, sorry, I meant we use both MACs on Zynq, however the PHYs are on the MDIO
> > bus of the first MAC. So, the second MAC is used for ethernet but not for MDIO,
> > and so it does not have any PHYs under its DT node. It would be nice if there
> > were a way to tell macb not to bother with MDIO for the second MAC, since that's
> > handled by the first MAC.
>
> Yes, exactly, add support for status = "disabled" in the mdio node.

Unfortunately, the 'macb' doesn't have a "mdio node", or alternatively:
the node representing the mdio bus is the same node which represents the
macb instance itself. Setting 'status = "disabled"' on this node will
just prevent the probing of the macb instance.

Josh

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 473 bytes --]