Re: Which PHY connection to use on MPC8541...

On Oct 11, 2005, at 05:57, Stefan Nickl wrote:

Hi,

about a year ago we resorted to using port pin MDIO in this situation
for the FCCs because the fcc_enet driver and the gianfar driver live
in separate worlds, so to speak.

But in the meantime, Andy Fleming was very active regarding the PHY
abstraction layer. I still haven't seen patches that migrate fcc_enet
to using this layer, but the gianfar driver seems to use this code  
now.

The work to migrate the new fs_enet driver to use the TSEC MDIO is in  
progress.  I have a few other things I'm working on right now, and  
I've been having some hardware issues, but I've already done most of  
the work to get the FCC to use the TSEC's MDIO bus.

So I'd say quick solution: use TSEC1 MDIO for TSECs and cpm port pins
for FCC, clean solution: change fcc_enet to use the PHY abstraction
layer.

I'd say it depends on how long until your hardware is ready.  You  
might want to wire up the cpm IO pins, just in case.  I have yet to  
actually get the fs_enet driver to send packets on the 8560, so  
there's no telling how long it will be before that driver works on 8541.

Andy