[PATCH 1/4] ARM: dts: sun8i: Extend Orange Pi PC dt to also handle the PC Plus

[hdegoede@redhat.com (Hans de Goede)]

Hi,

On 31-08-16 18:28, Maxime Ripard wrote:
> Hi Hans,
>
> Sorry for the slow response, it was burried in my inbox.
>
> On Sun, Aug 07, 2016 at 04:25:20PM +0200, Hans de Goede wrote:
>> Hi,
>>
>> On 28-07-16 22:36, Hans de Goede wrote:
>>> Hi,
>>>
>>> On 28-07-16 20:17, Maxime Ripard wrote:
>>>> Hi Hans,
>>>>
>>>> On Tue, Jul 26, 2016 at 11:07:23PM +0200, Hans de Goede wrote:
>>>>>>>> Nothing prevents you from including the orange pi pc dts, from the
>>>>>>>> orange pi plus dts.
>>>>>>>>
>>>>>>>> It prevents the duplication you were trying to avoid, and it doesn't
>>>>>>>> create all those spurious errors and devices.
>>>>>>>
>>>>>>> That would solve the copy paste problem on the kernel side, but that
>>>>>>> would still mean adding a new u-boot defconfig for this, which means that
>>>>>>> all the distro's which ship with prebuild u-boot binaries need to build
>>>>>>> for yet another board, something which I would like to avoid.
>>>>>>
>>>>>> Still, registering devices that are not present on the board is not an
>>>>>> option.
>>>>>
>>>>> Ok, new version send.
>>>>>
>>>>> What about the other 3 patches in this series ?
>>>>
>>>> I guess the same comment applies for patch 2.
>>>
>>> The difference is that there really is no harm at all from
>>> enabling the extra usb controllers used on the plus 2e
>>> on the plus and plus 2 as well, no errors, no nothing, they
>>> just sit their as usb controllers without an usb device plugged
>>> in. But if you insist I can do a separate dts + u-boot defconfig
>>> for the plus 2e as well (but I would rather not).
>>
>> Ping, what is the verdict on this, are you ok with the patch or
>> do you want me to create a separate dts file for the Orange Pi
>> Plus 2E, note that doing so is going to be highly confusing to
>> users, there are 3 plus boards:
>
> I still believe that enabling clocks, regulators, claiming pins for
> device that are entirely unused on the board is not ok.
>
>> Orange Pi Plus
>> Orange Pi Plus 2   (same as the original plus but with 2G RAM, uses same u-boot defconfig / dts file)
>
> Yes, that makes sense.
>
>> Orange Pi Plus 2E  (drops the USB-hub instead using all 3 host controllers)
>
> However, I'm really worried about this one. If we go this way, there's
> essentially no going back. If for some reason we want to have a
> separate DT in the future (some unforeseen quirk to apply, pin to
> setup that conflicts on another board, etc.), we will be completely
> screwed because our users will be expecting to use the common DT,
> while it wouldn't be wise anymore.
>
> The other way around is much easier to deal with.

OK, fair enough, one patch to add a separate dts file for
the plus 2e coming up.

Regards,

Hans