linux-kernel - Re: [PATCH 1/4] dt-bindings: iio: adc: Add the Renesas RZ/N1 ADC

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Message-ID: <20251023105445.1adb2e86@bootlin.com>
Date: Thu, 23 Oct 2025 10:55:03 +0200
From: Herve Codina <herve.codina@...tlin.com>
To: Wolfram Sang <wsa+renesas@...g-engineering.com>, Geert Uytterhoeven
 <geert+renesas@...der.be>
Cc: Jonathan Cameron <jic23@...nel.org>, David Lechner
 <dlechner@...libre.com>, Nuno Sá <nuno.sa@...log.com>, Andy
 Shevchenko <andy@...nel.org>, Rob Herring <robh@...nel.org>, Krzysztof
 Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, Magnus
 Damm <magnus.damm@...il.com>, Liam Girdwood <lgirdwood@...il.com>, Mark
 Brown <broonie@...nel.org>, linux-iio@...r.kernel.org,
 linux-renesas-soc@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, Pascal Eberhard <pascal.eberhard@...com>,
 Miquel Raynal <miquel.raynal@...tlin.com>, Thomas Petazzoni
 <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH 1/4] dt-bindings: iio: adc: Add the Renesas RZ/N1 ADC

Hi Wolfram, Geert,

On Fri, 17 Oct 2025 09:07:42 +0200
Herve Codina <herve.codina@...tlin.com> wrote:

> > > +
> > > +properties:
> > > +  compatible:
> > > +    items:
> > > +      - enum:
> > > +          - renesas,r9a06g032-adc   # RZ/N1D
> > > +      - const: renesas,rzn1-adc    
> > 
> > Do you know of other SoCs with this IP core? If it is only RZ/N for now,
> > we could go with const for N1D. All other N1 variants cannot run Linux
> > because of no SDRAM controller.
> >   
> 
> I know only about RZ/N1 family.
> 
> I will keep only "renesas,r9a06g032-adc" in the next iteration.
> 

May be I misunderstood.

Most of other bindings related to rzn1d have the both r9a06g032 and
rzn1 compatible string.


Would you expect:

  - a) renesas,r9a06g032-adc and renesas,rzn1-adc

    compatible:
      items:
        - const: renesas,r9a06g032-adc   # RZ/N1D
        - const: renesas,rzn1-adc

or

 - b) renesas,r9a06g032-adc only

    compatible:
      const: renesas,r9a06g032-adc

Can you confirm your expectation?

Best regards,
Hervé