Re: [PATCH v2 2/3] ARM: dts: sunxi: add support for Orange Pi Zero board

[Hans de Goede]

Hi,

On 02-12-16 15:22, Icenowy Zheng wrote:
> 01.12.2016, 17:36, "Maxime Ripard" <maxime.ripard@xxxxxxxxxxxxxxxxxx>:
> > On Mon, Nov 28, 2016 at 12:29:07AM +0000, Andrà Przywara wrote:
> > >  > Something more interesting happened.
> > >  >
> > >  > Xunlong made a add-on board for Orange Pi Zero, which exposes the
> > >  > two USB Controllers exported at expansion bus as USB Type-A
> > >  > connectors.
> > >  >
> > >  > Also it exposes a analog A/V jack and a microphone.
> > >  >
> > >  > Should I enable {e,o}hci{2.3} in the device tree?
> > >
> > >  Actually we should do this regardless of this extension board. The USB
> > >  pins are not multiplexed and are exposed on user accessible pins (just
> > >  not soldered, but that's a detail), so I think they qualify for DT
> > >  enablement. And even if a user can't use them, it doesn't hurt to have
> > >  them (since they are not multiplexed).
> >
> > My main concern about this is that we'll leave regulators enabled by
> > default, for a minority of users. And that minority will prevent to do
> > a proper power management when the times come since we'll have to keep
> > that behaviour forever.
>
> I think these users can add a 'fdt set /xxx/xxx status "disabled" ' .

I don't think that will be necessary I'm pretty sure these extra usb
ports do not have a regulator for the Vbus, they just hook directly
to the 5V rail, can someone with a schematic check ?

Regards,

Hans