[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:
> It's more a question about what that input on the PHY chip sees during
> powerup / reset... it needs to be nicely and definitely high the whole
> time so it will ignore what happens then.  Is it pulled up, or just
> connected to the iMX GPIO?  iMX GPIO alone may not be enough.  They
> mostly default to 100K pullup but even that may not be enabled early in
> the powerup action.
>

The CS_N pin is connected directly to GPIO (PA24) with no pull-up.

> A 10K to your IO voltage rail on CS_N solved it for the LiteKIT and on
> the boards we have made.
>

I place a 10K resistor to pull-up and changed CS_N to low at usb
platform init and it worked fine!

Thank you very much!

Best Regards,

Alan