[U-Boot] USB doesn't work on Rockpro64 in u-boot

Vasily Khoruzhick anarsoul at gmail.com
Sat Nov 9 08:42:04 UTC 2019

On Thu, Nov 7, 2019 at 10:33 PM Jagan Teki <jagan at amarulasolutions.com> wrote:
> Hi Vasily,
> On Fri, Nov 8, 2019 at 9:18 AM Vasily Khoruzhick <anarsoul at gmail.com> wrote:
> >
> > I checked voltage on regulator enable pin and it's 1.5v in u-boot (and it's
> > not enough to enable regulator!) and in linux it's 3v. That's why USB
> > ports have no power in u-boot.
> >
> > Looks like u-boot doesn't switch GPIO voltage from 1.8v to 3.3v. Any
> > ideas how to fix this?
> I think I need to clock look of this, will look into it next week. I'm
> travelling till that time.

I figured it out, rockpro64 needs I/O domains to be configured in
order for USB to work.

See "rockchip: rk3399: split rockpro64 out of evb_rk3399" patch on ML.

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