Re: [help] imx27 - isp1504 : unable to init transceiver, probably missing

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On Sun, Sep 29, 2013 at 11:32 AM, Christoph Fritz
<chf.fritz@xxxxxxxxxxxxxx> wrote:
>> Le 26/09/2013 17:59, Christoph Fritz a écrit :
>> > Their software fix:
>> >     "As first attemp at fixing this issue, one may try to switch LINK to
>> >     ULPI mode before configuring MUX and pads for USB operation. Fear is
>> >     that this could cause unexpected transfer from PHY to LINK, somehow
>> >     preventing proper initialization"
>> >
>> > I'll try that here with the smsc3340-phy.
>
> What a mess, it is also important in what order the muxing of USB-Pins
> is done beside the fact that some USBOTG pins had a GPIO_OUT configured
> wrongly. Don't ask how I hit this, but with that and the info from above
> finally both smsc3340 phys on OTG and USBH2 get detected: pure

Can you show a patch or code so that others could fix this problem as well?

Regards,

Fabio Estevam
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