linux-kernel - Re: [PATCH v2 2/6] dt-bindings: i2c: renesas,riic: Document RZ/T2H support

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Message-ID: <CA+V-a8sWMFEA5Ub8nGh6jygcQKKVm568nD2zo5HSE2jN1qp4pg@mail.gmail.com>
Date: Fri, 13 Jun 2025 11:10:28 +0100
From: "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To: Geert Uytterhoeven <geert@...ux-m68k.org>
Cc: Chris Brandt <chris.brandt@...esas.com>, Andi Shyti <andi.shyti@...nel.org>, 
	Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Andy Shevchenko <andy@...nel.org>, Magnus Damm <magnus.damm@...il.com>, 
	Wolfram Sang <wsa+renesas@...g-engineering.com>, linux-renesas-soc@...r.kernel.org, 
	linux-i2c@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, Biju Das <biju.das.jz@...renesas.com>, 
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>, 
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>, 
	Conor Dooley <conor.dooley@...rochip.com>
Subject: Re: [PATCH v2 2/6] dt-bindings: i2c: renesas,riic: Document RZ/T2H support

Hi Geert,

Thank you for the review.

On Thu, Jun 12, 2025 at 1:17 PM Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
>
> Hi Prabhakar,
>
> On Mon, 9 Jun 2025 at 20:41, Prabhakar <prabhakar.csengg@...il.com> wrote:
> > From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> >
> > Document support for the I2C Bus Interface (RIIC) found on the Renesas
> > RZ/T2H (R9A09G077) SoC. The RIIC IP on this SoC is similar to that on
> > the RZ/V2H(P) SoC but supports fewer interrupts, lacks FM+ support and
> > does not require resets. Due to these differences, add a new compatible
> > string `renesas,riic-r9a09g077` for the RZ/T2H SoC.
> >
> > Unlike earlier SoCs that use eight distinct interrupts, the RZ/T2H uses
> > only four, including a combined error/event interrupt. Update the binding
> > schema to reflect this interrupt layout and skip the `resets` property
> > check, as it is not required on these SoCs.
> >
> > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> > Acked-by: Conor Dooley <conor.dooley@...rochip.com>
> > Reviewed-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
> > ---
> > v1-> v2:
> > - Listed the interrupts in the order as mentioned in the
> >   HW manual.
> > - Renamed the interrupt names to match the HW manual.
> > - Added Acked-by and Reviewed-by tags.
>
> Thanks for the update!
>
> > --- a/Documentation/devicetree/bindings/i2c/renesas,riic.yaml
> > +++ b/Documentation/devicetree/bindings/i2c/renesas,riic.yaml
> > @@ -29,32 +29,46 @@ properties:
> >                - renesas,riic-r9a09g056   # RZ/V2N
> >            - const: renesas,riic-r9a09g057   # RZ/V2H(P)
> >
> > -      - const: renesas,riic-r9a09g057   # RZ/V2H(P)
> > +      - enum:
> > +          - renesas,riic-r9a09g057   # RZ/V2H(P)
> > +          - renesas,riic-r9a09g077   # RZ/T2H
> >
> >    reg:
> >      maxItems: 1
> >
> >    interrupts:
> > -    items:
> > -      - description: Transmit End Interrupt
> > -      - description: Receive Data Full Interrupt
> > -      - description: Transmit Data Empty Interrupt
> > -      - description: Stop Condition Detection Interrupt
> > -      - description: Start Condition Detection Interrupt
> > -      - description: NACK Reception Interrupt
> > -      - description: Arbitration-Lost Interrupt
> > -      - description: Timeout Interrupt
> > +    oneOf:
> > +      - items:
> > +          - description: Transmit End Interrupt
> > +          - description: Receive Data Full Interrupt
> > +          - description: Transmit Data Empty Interrupt
> > +          - description: Stop Condition Detection Interrupt
> > +          - description: Start Condition Detection Interrupt
> > +          - description: NACK Reception Interrupt
> > +          - description: Arbitration-Lost Interrupt
> > +          - description: Timeout Interrupt
> > +      - items:
> > +          - description: Transmit Error Or Event Generation
>
> s/Transmit/Transfer/
>
Agreed.

> > +          - description: Receive Data Full Interrupt
> > +          - description: Transmit End Interrupt
> > +          - description: Transmit Data Empty Interrupt
>
> The last two don't match the order in the documentation, and the
> order in interrupt-names below.
>
Ouch, I'll fix that and send a new version.

Cheers,
Prabhakar