Re: [PATCH 1/2] dt-bindings: pwm: Document Tegra194 and Tegra264 controllers

[Krzysztof Kozlowski <krzk@kernel.org>]

On 23/03/2026 15:45, Thierry Reding wrote:
> On Sat, Mar 21, 2026 at 11:47:59AM +0100, Krzysztof Kozlowski wrote:
>> On Sat, Mar 21, 2026 at 12:40:55AM +0100, Thierry Reding wrote:
>>> From: Thierry Reding <treding@nvidia.com>
>>>
>>> The PWM controller found on Tegra264 is largely compatible with the one
>>> on prior generations, but it comes with some extra features, hence a new
>>> compatible string is needed.
>>
>> Extra features means devices are compatible.
>>
>> You also always need a new compatible even without extra features, so
>> last part is just confusing. Suggests like you could skip new
>> compatible.
> 
> Erm... if the hardware was exactly identical, then there'd be no need
> for a new compatible string. It's certainly good practice to add one
> anyway, but what's the point in having 10 different compatible strings
> for exactly the same hardware?

Because integration is different. Nothing new here, DT maintainers
request it for years and is since long time documented in writing bindings.


Best regards,
Krzysztof