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

[icenowy@aosc.xyz (Icenowy Zheng)]

05.12.2016, 17:40, "Maxime Ripard" <maxime.ripard@free-electrons.com>:
> On Mon, Dec 05, 2016 at 04:59:44PM +0800, Icenowy Zheng wrote:
>> ?2016?12?5? 16:52? Maxime Ripard <maxime.ripard@free-electrons.com>???
>> ?>
>> ?> On Fri, Dec 02, 2016 at 10:22:30PM +0800, Icenowy Zheng wrote:
>> ?> >
>> ?> >
>> ?> > 01.12.2016, 17:36, "Maxime Ripard" <maxime.ripard@free-electrons.com>:
>> ?> > > On Mon, Nov 28, 2016 at 12:29:07AM +0000, Andr? 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" ' .
>> ?>
>> ?> You can't ask that from the majority of users. These users will take
>> ?> debian or fedora, install it, and expect everything to work
>> ?> properly. I would make the opposite argument actually. If someone is
>> ?> knowledgeable enough to solder the USB pins a connector, then (s)he'll
>> ?> be able to make that u-boot call.
>>
>> ?Now (s)he do not need soldering.
>>
>> ?(S)he needs only paying $1.99 more to Xunlong to get the expansion
>> ?board, and insert it on the OPi Zero.
>
> Which is going to require an overlay anyway, so we could have the USB
> bits in there too.

If so, I think the [PATCH -next v3 2/2] is ready to be merged ;-)

>
> Maxime
>
> --
> Maxime Ripard, Free Electrons
> Embedded Linux and Kernel engineering
> http://free-electrons.com