linux-kernel - Re: [PATCH] dt-bindings: clock: fixed: Define a preferred node name

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Date: Tue, 30 Apr 2024 07:33:45 -0500
From: Rob Herring <robh@...nel.org>
To: Stephen Boyd <sboyd@...nel.org>
Cc: Conor Dooley <conor+dt@...nel.org>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
	Michael Turquette <mturquette@...libre.com>, linux-clk@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dt-bindings: clock: fixed: Define a preferred node name

On Mon, Apr 29, 2024 at 7:11 PM Stephen Boyd <sboyd@...nel.org> wrote:
>
> Quoting Rob Herring (Arm) (2024-04-25 11:38:09)
> > diff --git a/Documentation/devicetree/bindings/clock/fixed-clock.yaml b/Documentation/devicetree/bindings/clock/fixed-clock.yaml
> > index b0a4fb8256e2..d287bd092054 100644
> > --- a/Documentation/devicetree/bindings/clock/fixed-clock.yaml
> > +++ b/Documentation/devicetree/bindings/clock/fixed-clock.yaml
> > @@ -11,6 +11,13 @@ maintainers:
> >    - Stephen Boyd <sboyd@...nel.org>
> >
> >  properties:
> > +  $nodename:
> > +    anyOf:
> > +      - description: Preferred name is 'clock-<freq>'
>
> Is the preferred value of <freq> the clock-frequency property? Should
> say that explicitly somehow so that it's clear.

Yes, will add.

> > +        pattern: "^clock-([0-9]+|[a-z0-9-]+)$"
> > +      - description: Any name allowed
> > +        deprecated: true
> > +
> >    compatible:
> >      const: fixed-clock
> >
> > diff --git a/Documentation/devicetree/bindings/clock/fixed-factor-clockyaml b/Documentation/devicetree/bindings/clock/fixed-factor-clock.yaml
> > index 8f71ab300470..962a1fe85416 100644
> > --- a/Documentation/devicetree/bindings/clock/fixed-factor-clock.yaml
> > +++ b/Documentation/devicetree/bindings/clock/fixed-factor-clock.yaml
> > @@ -11,6 +11,14 @@ maintainers:
> >    - Stephen Boyd <sboyd@...nel.org>
> >
> >  properties:
> > +  $nodename:
> > +    anyOf:
> > +      - description:
> > +          Preferred name is 'clock-<freq>' if the input frequency is fixed
>
> Similar question here. Is <freq> supposed to be the output clock frequency?

Yes.

>
> > +        pattern: "^clock-([0-9]+|[0-9a-z-]+)$"
> > +      - description: Any name allowed
> > +        deprecated: true
>
> I hope that deprecating this doesn't cause folks to try to clean things
> up and then break code that's depending on the node name to be the name
> of the clk. We don't want that string name to be important but it is
> sometimes.

Right. Leaving things as-is is the intent. We won't be enabling any
"no deprecated" mode by default when it is added.


Rob