netdev - Re: [PATCH] Re: ep93xx

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Message-ID: <48CC72D4.1020001@garzik.org>
Date:	Sat, 13 Sep 2008 22:11:32 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Oliver Martin <oliver.martin@...dent.tuwien.ac.at>
CC:	netdev@...r.kernel.org, hvr@....org, buytenh@...tstofly.org
Subject: Re: [PATCH] Re: ep93xx_eth PHY problems

Oliver Martin wrote:
> Am Tue, 04 Mar 2008 14:02:15 +0100
> schrieb Oliver Martin <oliver.martin@...dent.tuwien.ac.at>:
>> 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 <oliver.martin@...dent.tuwien.ac.at>

Testing feedback?  Lennert ack?


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