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

[Icenowy Zheng]

01.12.2016, 17:36, "Maxime Ripard" <maxime.ripard at free-electrons.com>:
> On Mon, Nov 28, 2016 at 12:29:07AM +0000, André 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" ' .

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