[PATCH 1/1] fix occasional ULPI timeouts with ehci-mxc

[Alan Carvalho de Assis]

Hi Andy,

On 12/2/09, Andy Green <andy at warmcat.com> wrote:
>
> What did you do with your chip select line on the ULPI PHY?
>

I turn this line (CS_N) low before initializing ISP1504.

> The first iMX LiteKIT board I had was an old revision where they had
> tied the PHY chip select pin asserted.  The ULPI PHY acted braindamaged
> because glitchy junk from during poweron / reset was taken as real data
> and it never recovered during the session.
>
> Later versions of the LiteKIT changed this to be pulled deasserted and a
> GPIO can drive it asserted after reset is all done.  After I got a later
> revision with that mod, and drove the GPIO, suddenly all was well.
>

I was thinking it could be some hw issues, but this is not, because
using old kernel everything works fine.

Best Regards,

Alan