Hi Fabio,

Could this problem be the same one as reported at:
http://www.spinics.net/lists/arm-kernel/msg347914.html ?

The problem you link to describes a permanent issue, our problem seems
to be sporadic as most of our tests work fine (at least for a while).

Which Ethernet PHY do you use? Do you have pull-up in the MDIO line?

Our hardware has the KSZ9021RN PHY, so the MDIO line should be pull-up.

Do you know if there are debug options that could help us determine the
cause of the timeout?

Best regards,
Mattis Lorentzon

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