(subset) [PATCH v1 0/3] spidev: introduce trivial abb sensor device

[Guenter Roeck]

On 7/21/25 21:05, Heiko Schocher wrote:
> Hello Krzysztof,
> 
> On 21.07.25 18:24, Krzysztof Kozlowski wrote:
>> On 21/07/2025 17:56, Mark Brown wrote:
>>> On Sat, 19 Jul 2025 08:33:51 +0200, Heiko Schocher wrote:
>>>> This series introduces the changes needed for trivial spi
>>>> based sensors from ABB, currently operated from userspace.
>>>>
>>>> The last patch adds the spidevices to the DTS files, already
>>>> in mainline.
>>>>
>>>> make dtbs_check showed no errors/warnings for the dts files
>>>>
>>>> [...]
>>>
>>> Applied to
>>>
>>>     https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next
>>>
>>> Thanks!
>>>
>>> [1/3] dt-bindings: trivial-devices: Document ABB sensors
>>>        commit: aad2f87cbcab56b322109d26d7b11842a09df91f
>>> [2/3] spi: spidev: Add an entry for the ABB spi sensors
>>>        commit: d60f7cab7c04944a79af16caa43c141e780a59c6
>>>
>>
>>
>> That's unexpected, Mark. Patches received two objections/comments and I
>> don't think discussion was resolved.
>>
>> ABB is huge company, probably making hundreds or more of sensors. The
>> patchset basically claims that all of them work with spidev. It does not
>> providing any model names or details, so it seems really incomplete to
>> call them trivial devices.
> 
> I do not know how many different sensors they have, nor if that department can
> speak for the whole company...
> 
> What I have as information is:
> https://lore.kernel.org/linux-spi/2477dc64-92a0-9dc9-d168-56646d0d796e@denx.de/
> 
> and I get no more information about them currently. May I should
> add some sort of trivial into compatible name? Something like
> 
> "abb,spi-trivial-sensor"
> or
> "abb,spidev-trivial-sensor"
> 
> which makes it clearer, that only ABB trivial sensor, controlled through spidev
> driver, is connected here?
> 

FWIW, I always thought that devicetree is not supposed to contain such generic
information. Is it even appropriate to list something like this in devicetree
in the first place ?

If so, what prevents anyone from submitting hundreds of
"<company>,spidev-trivial-<device-type>" entries, using the same line of argument ?

Guenter