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Date: Tue, 5 Dec 2023 10:02:46 +0100
From: Andreas Kemnade <andreas@kemnade.info>
To: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
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Subject: Re: [PATCH RFC 01/10] dt-bindings: gpu: Add PowerVR Series5 SGX
 GPUs
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On Tue, 5 Dec 2023 09:45:44 +0100
Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> wrote:

> > Sure the clock nodes can be there for the child IP, but they won't do
> > anything. And still need to be managed separately by the device driver if
> > added.  
> 
> So if OS does not have runtime PM, the bindings are wrong? Bindings
> should not depend on some particular feature of some particular OS.

Any user of the devicetree sees that there is a parent and the parent needs
to be enabled by some mechanism.
E.g. I2c devices do not specify the clocks of the parent (the i2c master)

Maybe it is just more fine-grained on omap.

look e.g. at ti/omap/omap4-l4.dtsi
there are target-module@xxxx
with the devices as a child and a clock in the parent.

Regards,
Andreas