Oliver Martin wrote:

Am Tue, 04 Mar 2008 14:02:15 +0100
schrieb Oliver Martin [off-list ref]:

quoted

Now I'm having different problems: When auto-negotiation is enabled,
it sometimes randomly changes the link state:

PHY: 0:01 - Link is Down
PHY: 0:01 - Link is Up - 100/Full

I've found at least one part of the problem. The MDIO clock divisor
wasn't set again after the reset in ep93xx_start_hw. It was left at the
default, resulting in a 12.5 MHz clock, which the PHY (Micrel KSZ8721BL)
didn't like too much. Calling ep93xx_mdio_reset after the reset fixed
it, the link is now perfectly stable in auto-negotiation mode.

There still seems to be another bug with auto-negotiation disabled: It
doesn't switch to 1000 Mbps any more, but most times it doesn't stay in
the intended configuration either. I haven't done any extensive
testing of this yet, though.

Signed-off-by: Oliver Martin <redacted>

Testing feedback?  Lennert ack?