[U-Boot] SMSC LAN8720 support

[Maxim Podbereznyi]

Hi Ben!

I've made LAN8720 work with AT91SAM9G45 MPU. The problem was in a wrong
address assigning during the PHY reset. The PHY has internal pull-down on
the PHYAD0 line but the init code for AT91 turns off processor's pull-up
during PHY reset only for a few lines and they are not PHYAD0. So I disabled
also the processor's pull-up to the right line and the PHY got alive. I've
tested tftp - works perfect!

Thank you for the help!

2010/2/8 Ben Warren <biggerbadderben at gmail.com>

> Hi Maxim,
>
> On 2/7/2010 1:32 PM, Maxim Podbereznyi wrote:
>
>> Hi all!
>>
>> I need enable the support of the new SMSC Ethernet PHY LAN8720 in
>> AT91SAM based system. Can anybody give me a piece of advice how I can
>> do it?
>>
>>
>>
>  I don't have any direct experience with either this PHY or AT91SAM, but a
> cursory glance of the PHY datasheet makes it seem that there's nothing
> special here, so it might just work without modification.  Do you have a
> working reference board that has a different PHY that this can be compared
> to?
>
>> Any help is appreciated!
>>
>> Regards,
>> Max
>> _
>>
>>
> regards,
> Ben
>