RE: Problem using FEC on a860T

Jeremy Rosen wrote:

I am still struggling with my FADS, and the 2.4.4-07.23 kernel from
Denx...

I am trying to have the FEC working, but I hqve problems..

when I compile without "MDIO for PHY configuration"
the kernel prints forever the message  "fec.c[1374]
mii_link_interrupt:
unexpected Link interrupt
on the console at boottime.

when I compile with it, the kernel Oopses.
after carefull debugging, I tracked it down to the line 1367 in
arch/ppc/8xx_io/
    mii_do_cmd(dev, fep->phy->ack_int);

it is a kernel access of bad area.

It is possible that I have missed something in the
configuration, but I
really can't guess what...

No, You have not missed anything on configuration.

There is a problem in some FADS boards that makes the irq pin used for mii_link_interrupt always active. That is the reason why you are getting the unexpected mii_link_interrupt.

Firstly, apply the attached patch. This patch was written by Dave Ellis. It will disable the mii_link_interrupt when the "MDIO for PHY configuration" was not selected.

Secondly, you need compile without the "MDIO for PHY configuration". FADS does not use that.

I hope this helps

Evandro