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

[Thierry Reding <thierry.reding@kernel.org>]

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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?

In this case the new compatible string is necessary so that we can take
advantage of the new features that are not covered yet by an existing
binding.

Thierry

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