linux-kernel - Re: [PATCH RFC v2] dt-bindings: mmc: mmc-slot: make compatible property optional

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Message-ID: <20250207-cheating-winking-1dace55a4341@spud>
Date: Fri, 7 Feb 2025 16:03:14 +0000
From: Conor Dooley <conor@...nel.org>
To: neil.armstrong@...aro.org
Cc: Dharma.B@...rochip.com, ulf.hansson@...aro.org, robh@...nel.org,
	krzk+dt@...nel.org, conor+dt@...nel.org, khilman@...libre.com,
	jbrunet@...libre.com, martin.blumenstingl@...glemail.com,
	linux-mmc@...r.kernel.org, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH RFC v2] dt-bindings: mmc: mmc-slot: make compatible
 property optional

On Fri, Feb 07, 2025 at 10:17:29AM +0100, neil.armstrong@...aro.org wrote:
> On 07/02/2025 10:02, Dharma.B@...rochip.com wrote:
> > On 07/02/25 2:25 pm, Neil Armstrong wrote:
> > > EXTERNAL EMAIL: Do not click links or open attachments unless you know
> > > the content is safe
> > > 
> > > On 05/02/2025 04:48, Dharma Balasubiramani wrote:
> > > > Remove the compatible property from the list of required properties and
> > > > mark it as optional.
> > > > 
> > > > Signed-off-by: Dharma Balasubiramani <dharma.b@...rochip.com>
> > > > ---
> > > > Changes in v2:
> > > > - Instead of moving the compatible string to the other binding, just
> > > > make it
> > > >     optional (remove from required list).
> > > > - Link to v1: https://lore.kernel.org/r/20241219-mmc-slot-v1-1-
> > > > dfc747a3d3fb@...rochip.com
> > > > ---
> > > >    Documentation/devicetree/bindings/mmc/mmc-slot.yaml | 1 -
> > > >    1 file changed, 1 deletion(-)
> > > > 
> > > > diff --git a/Documentation/devicetree/bindings/mmc/mmc-slot.yaml b/
> > > > Documentation/devicetree/bindings/mmc/mmc-slot.yaml
> > > > index 1f0667828063..ca3d0114bfc6 100644
> > > > --- a/Documentation/devicetree/bindings/mmc/mmc-slot.yaml
> > > > +++ b/Documentation/devicetree/bindings/mmc/mmc-slot.yaml
> > > > @@ -29,7 +29,6 @@ properties:
> > > >        maxItems: 1
> > > > 
> > > >    required:
> > > > -  - compatible
> > > >      - reg
> > > 
> > > If you remove it from here then it's still required in Documentation/
> > > devicetree/bindings/mmc/amlogic,meson-mx-sdio.yaml
> > > so please add it.
> > 
> > If moving the compatible to its specific binding isn't appropriate (as
> > per Conor),
> > and if removing it from the required list here doesn’t seem reasonable
> > to you,
> > then adding an unnecessary compatible string in our DTS files doesn’t
> > make sense to me.
> > 
> > What could be the solution then?
> 
> The solution is right but you modify the meson-mx-sdio bindings, so
> simply add compatible in a required list for the slot node.
> 
> Something like:
> ========================================================================
> diff --git a/Documentation/devicetree/bindings/mmc/amlogic,meson-mx-sdio.yaml b/Documentation/devicetree/bindings/mmc/amlogic,meson-mx-sdio.yaml
> index 022682a977c6..0d4d9ca6a8d9 100644
> --- a/Documentation/devicetree/bindings/mmc/amlogic,meson-mx-sdio.yaml
> +++ b/Documentation/devicetree/bindings/mmc/amlogic,meson-mx-sdio.yaml
> @@ -60,6 +60,9 @@ patternProperties:
>        bus-width:
>          enum: [1, 4]
> 
> +    required:
> +      - compatible
> +
>      unevaluatedProperties: false
> 
> ========================================================================
> 
> Conor, Is it right ?

Looks about right, ye.

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