[U-Boot] [PATCH 3/3] M28: Disable USB power on boot

[Marek Vasut]

Dear Fabio Estevam,

> On Wed, May 23, 2012 at 8:53 AM, Marek Vasut <marex at denx.de> wrote:
> > Dang, this must be related to bootrom somehow then. Fabio, can you
> > confirm the following:
> > 
> > If you turn off the mx28 board, connect usb flashdisc, turn it on -- do
> > you see the flashdisc led blinking? Any idea what might cause it? This
> > patch forced the VBUS off, so very early in uboot, the USB flash has no
> > way to blink (unless there's some surge).
> 
> I have just tried it on my mx28evk and I don't see the USB thumb LED to
> turn on.
> 
> Only if I do a "usb reset" that it turns on. Doing a "usb stop" turns
> it off as expected.
> 
> I would suggest you to compare your USB circuitry  against mx28evk
> schematics.

Well, what can it be caused by? I disabled the VBUS, so how come it can still be 
on. The usb circuitry maybe then?

> Regards,
> 
> Fabio Estevam

Best regards,
Marek Vasut