AW: Direct MII connection between MPC8313 and VIRTEX FPGA

[Frank Prepelica]

> What kernel version are you using?

We are using kernel version 2.6.24. I've searched for "current speed" in version 2.6.28.7 and I've found that string.

> Yes, you need to modify the DTB.  You have a back to back MII
> connection, not a phy, so you do *not* want to have a PHY node in the
> device tree.

Hmm, but I do have a "PHY", don't I?. The "PHY" will be emulated in the FPGA. Of course, it's not a physical PHY but it should look like one.
So, do I really need the remove the complete PHY description in the DTB?


	
		 
 

Frank Prepelica
Software Design Engineer

Ubidyne GmbH
Lise-Meitner-Str.-14
89081 Ulm - Germany



> -----Ursprüngliche Nachricht-----
> Von: Grant Likely [mailto:grant.likely at secretlab.ca]
> Gesendet: Montag, 29. Juni 2009 17:40
> An: Frank Prepelica
> Cc: linuxppc-dev at ozlabs.org
> Betreff: Re: Direct MII connection between MPC8313 and VIRTEX FPGA
> 
> On Mon, Jun 29, 2009 at 2:23 AM, Frank
> Prepelica<Frank.Prepelica at ubidyne.com> wrote:
> > Hi Grant
> >
> > Thanks for your response!
> >
> > I have searched for "current-speed" in drivers/net/fec_mpc52xx.c but I
> cannot find anything. However we are using the gianfar.c Ethernet driver.
> > Do you know whether this driver supports fixed MII links without PHY?
> 
> What kernel version are you using?
> 
> > I've got another question regarding MII connection between and MPC and a
> Virtex FPGA. Whats about the PHY address which has to be set in the DTB
> file? Do I have to modify the DTB at all?
> 
> Yes, you need to modify the DTB.  You have a back to back MII
> connection, not a phy, so you do *not* want to have a PHY node in the
> device tree.
> 
> g.
> 
> --
> Grant Likely, B.Sc., P.Eng.
> Secret Lab Technologies Ltd.