tqm5200s phy link toggles between up and down

Wolfgang Grandegger wg at grandegger.com
Tue Dec 18 21:05:02 EST 2012

On 12/18/2012 10:57 AM, Wolfgang Grandegger wrote:
> On 12/18/2012 10:44 AM, Johannes Braun wrote:
>> Hello,
>> I hope someone could help me with my problem. Currently I am porting
>> a new kernel (3.3.8) for a tqm5200s based board.
> This is not really a new kernel.
>> The previous kernel was 2.6.23. The new kernel version is needed because
>> of support for a wireless card.
>> The new kernel has problems with my ethernet PHY. The problem occurs only
>> with our hardware. Not with the TQ eval board.
>> The eval board uses a Intel PHY. Our board uses a Marvel 88E6085 PHY.
> Is it a PHY or a switch? If is a switch you need to configure a fixed
> link to the switch. This can be done via dts file.

Here is an example:


> Note the the DSA also supports this chip.

See http://lwn.net/Articles/302333/. But I think it lacks device tree


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