linux-kernel - Re: [PATCH v7 0/3] dt-bindings: mfd: twl: Consolidate and fix TI TWL family bindings

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Message-ID: <CANBuOYprmtSd6wuQur-bmaXHncogiOngNxAn7pkTcgf2dAOVWA@mail.gmail.com>
Date: Thu, 11 Sep 2025 11:50:05 +0200
From: Jihed Chaibi <jihed.chaibi.dev@...il.com>
To: Krzysztof Kozlowski <krzk@...nel.org>, Andreas Kemnade <andreas@...nade.info>
Cc: lee@...nel.org, krzk+dt@...nel.org, tony@...mide.com, robh@...nel.org, 
	conor+dt@...nel.org, ukleinek@...nel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-pwm@...r.kernel.org, 
	linux-omap@...r.kernel.org
Subject: Re: [PATCH v7 0/3] dt-bindings: mfd: twl: Consolidate and fix TI TWL
 family bindings

On Thu, Sep 11, 2025 at 9:07 AM Krzysztof Kozlowski <krzk@...nel.org> wrote:
>
> On 11/09/2025 08:43, Andreas Kemnade wrote:
> > Am Thu, 11 Sep 2025 08:35:32 +0200
> > schrieb Krzysztof Kozlowski <krzk@...nel.org>:
> >
> >> On Wed, Sep 10, 2025 at 06:07:01PM +0200, Jihed Chaibi wrote:
> >>> This version addresses a final piece of feedback from Andreas to make
> >>> the twl4030/twl6030-specific child nodes (audio, usb, keypad etc.)
> >>> conditional by moving them out of the common block, which now only
> >>> contains common properties (rtc, charger, pwm, pwmled..) ensuring
> >>> the schema is fully accurate.
> >>>
> >>> The complete dtbs_check for this binding is clean except for two
> >>> warnings originating from pre-existing bugs in the OMAP DTS files,
> >>> for which fixes have already been submitted separately [1][2].
> >>>
> >>> Reviewed-by: Rob Herring <robh@...nel.org>
> >>> Acked-by: Uwe Kleine-König <ukleinek@...nel.org>
> >>>
> >>> ---
> >>> Changes in v7:
> >>>   - (1/3): Moved twl4030/twl6030-specific child node definitions (audio,
> >>>     usb etc.) into the conditional 'if/then' block to improve schema
> >>>     accuracy.
> >>
> >> Who asked for this? It's wrong code.
> >>
> > maybe I was not clear there. That was not was I meant. As far as I
> > understand, the correct pattern is to define things outside of the
> > if/then block and
> > then disable it with property-name: false in the if/then block
> > Example: Handling of regulator-initial-mode property.
>
> Yes, I read your comment afterwards and that is how I would understand
> it as well.
>
> But the patch here is done differently.
>
>
> Best regards,
> Krzysztof

Hi Krzysztof, Andreas,

Thank you for the clarification. my apologies, I
misunderstood the correct pattern.

I was following the existing structure in the original yaml
file, where several board-specific sub-nodes like 'madc',
'pwrbutton', and 'gpadc' etc. were already defined inside
the 'if/then' blocks. I assumed that was the correct
convention and that the main properties block was only
for shared nodes (like 'regulator' & 'pwm'..) which is
not the case.

I had (mis)interpreted Krzysztof's earlier feedback about
top-level definitions as applying only to properties
that were common to all variants (like 'pwm').

I will send a v8 implementing this "define then disable"
pattern for all sub-nodes. This will be a good
opportunity to clean up the pre-existing definitions
to make the entire binding fully consistent.

Thanks,
Jihed