Re: [PATCH v4 1/4] mfd: wm831x: Support software nodes for DCDC regulators

[Arnd Bergmann]

On Thu, Nov 5, 2026, at 18:12, Dmitry Torokhov wrote:
> On Thu, Nov 05, 2026 at 02:43:17PM +0100, Arnd Bergmann wrote:
>> 
>> As far as I understand the situation, wm831x was used on the
>> reference board (Samsung smdk6410, removed in 2019) in addition
>> to crag6410 but never anywhere else upstream. The question
>> then is whether we'll ever see a DT conversion of crag6410.
>> This would require finding someone willing to actually do
>> the work, and coming up with a way to handle the autodetection
>> in mach-crag6410-module.c so the correct spi/i2c codec
>> child devices are probed.
>
> So I guess the question then: do we need to keep this board at all? Or
> it is time for it to go the way of the dodo? And then we could drop some
> more drivers as well.
>
> My goal for the series was to move along legacy gpio API conversions, as
> well as move away from the GPIO lookup tables (ideally I want them gone
> now that we have software nodes supporting describing GPIOs).

Mark Brown is using the board for testing eight Cirrus/Wolfson
audio codecs:

 - arizona and wm8994 have actual users with DT, but this is
   the board he has for testing with platform_data

 - wm0010, wm1250-ev1, wm5100, wm8996 and wm9081 have no other
   upstream users besides this board and no DT support, so arguably
   these are probably obsolete and could also be removed.

I assume Charles can comment on how important the testing still
is for the codec above, or if there is other hardware that could
be used for testing the arizona and wm8994 drivers in case the
other ones are in fact as obsolete as they appear.

       Arnd