linux-kernel - Re: [PATCH v4 6/9] dt-bindings: clock: nxp,imx95-blk-ctl: Add ldb child node

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Message-ID: <aLmdttUH/GoIhMRm@lizhi-Precision-Tower-5810>
Date: Thu, 4 Sep 2025 10:09:58 -0400
From: Frank Li <Frank.li@....com>
To: Laurentiu Palcu <laurentiu.palcu@....nxp.com>
Cc: Krzysztof Kozlowski <krzk@...nel.org>, imx@...ts.linux.dev,
	Abel Vesa <abelvesa@...nel.org>, Peng Fan <peng.fan@....com>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>, linux-clk@...r.kernel.org,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 6/9] dt-bindings: clock: nxp,imx95-blk-ctl: Add ldb
 child node

On Thu, Sep 04, 2025 at 03:14:53PM +0300, Laurentiu Palcu wrote:
> On Thu, Sep 04, 2025 at 09:27:31AM +0200, Krzysztof Kozlowski wrote:
> > On Wed, Sep 03, 2025 at 03:33:24PM +0300, Laurentiu Palcu wrote:
> > > Since the BLK CTL registers, like the LVDS CSR, can be used to control the
> > > LVDS Display Bridge controllers, add 'ldb' child node to handle
> > > these use cases.
> > >
> > > Signed-off-by: Laurentiu Palcu <laurentiu.palcu@....nxp.com>
> > > ---
> > >  .../bindings/clock/nxp,imx95-blk-ctl.yaml     | 24 ++++++++++++++++++-
> > >  1 file changed, 23 insertions(+), 1 deletion(-)
> >
> > Nothing in the changelog explains this patch.
> >
> > What happened with entire previous review?
> I will try adding a changlog to the individual patches in the future... :/
>
> >
> > >
> > > diff --git a/Documentation/devicetree/bindings/clock/nxp,imx95-blk-ctl.yaml b/Documentation/devicetree/bindings/clock/nxp,imx95-blk-ctl.yaml
> > > index 27403b4c52d62..f83d96701bb04 100644
> > > --- a/Documentation/devicetree/bindings/clock/nxp,imx95-blk-ctl.yaml
> > > +++ b/Documentation/devicetree/bindings/clock/nxp,imx95-blk-ctl.yaml
> > > @@ -39,6 +39,28 @@ properties:
> > >        ID in its "clocks" phandle cell. See
> > >        include/dt-bindings/clock/nxp,imx95-clock.h
> > >
> > > +if:
> > > +  properties:
> > > +    compatible:
> > > +      contains:
> > > +        const: nxp,imx94-lvds-csr
> > > +then:
> > > +  properties:
> > > +    "#address-cells":
> > > +      const: 1
> > > +
> > > +    "#size-cells":
> > > +      const: 1
> > > +
> > > +  patternProperties:
> > > +    "^ldb@[0-9a-f]+$":
> >
> > No, don't define nodes in if:then:. Where did you get this syntax from?
> I guess I looked over various bindings using patternProperties in if:then:
> blocks but I completely missed the fact that the nodes were actually defined
> outside... And you gave me a good hint in a reply for v4 but, somehow, I failed
> to completely understand what you suggested... :/
>
> Hopefully, the following *is* what you meant:
>
> ...
> patternProperties:
>   "^ldb@[0-9a-f]+$":
>     type: object
>     $ref: /schemas/display/bridge/fsl,ldb.yaml#
>
> if:
>   not:
>     properties:
>       compatible:
>         contains:
>           const: nxp,imx94-lvds-csr
> then:
>   patternProperties:
>     "^ldb@[0-9a-f]+$": false
> else:
>   required:
>     - '#address-cells'
>     - '#size-cells'
> ...
>
> >
> > > +      type: object
> > > +      $ref: /schemas/display/bridge/fsl,ldb.yaml#
> > > +
> > > +  required:
> > > +    - '#address-cells'
> > > +    - '#size-cells'
> > > +
> > >  required:
> > >    - compatible
> > >    - reg
> > > @@ -46,7 +68,7 @@ required:
> > >    - power-domains
> > >    - clocks
> > >
> > > -additionalProperties: false
> > > +unevaluatedProperties: false
> >
> > NAK, so schema warned you above syntax is wrong and you decided to
> > silence the warning with this hack, right?
> Indeed, the checks gave me a warning and I thought it was the right thing to
> use 'unevaluatedProperties: false' since additionalProperties cannot recognize
> properties declared in subschemas...
>
> Anyway, with the change above, 'additionalProperties: false' will do just fine.

Laurentiu:

	You can ping me by nxp team first if you have problem or can't
understand Krzysztof's means.

	Krzysztof is quite busy!

Frank

>
> Thanks,
> Laurentiu
>
> >
> > Best regards,
> > Krzysztof
> >