Re: [PATCH 1/6] dt-bindings: arm: renesas: Ignore the schema for RISC-V arch

From: "Lad, Prabhakar" <prabhakar.csengg@gmail.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
	 Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>,
	 Magnus Damm <magnus.damm@gmail.com>,
	Rob Herring <robh+dt@kernel.org>,
	 Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	 Paul Walmsley <paul.walmsley@sifive.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	 Albert Ou <aou@eecs.berkeley.edu>,
	Anup Patel <anup@brainfault.org>,
	 Linux-Renesas <linux-renesas-soc@vger.kernel.org>,
	 "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
	<devicetree@vger.kernel.org>,
	linux-riscv <linux-riscv@lists.infradead.org>,
	 LKML <linux-kernel@vger.kernel.org>,
	Biju Das <biju.das.jz@bp.renesas.com>
Subject: Re: [PATCH 1/6] dt-bindings: arm: renesas: Ignore the schema for RISC-V arch
Date: Wed, 27 Jul 2022 10:48:21 +0100	[thread overview]
Message-ID: <CA+V-a8tJVGz57FcJVnbksMot=pg5dXALo4QEyqO+57HnOTJLfQ@mail.gmail.com> (raw)
In-Reply-To: <3e3c0c80-48eb-098d-977d-a1801036fc0c@linaro.org>

Hi Krzysztof,

On Wed, Jul 27, 2022 at 10:31 AM Krzysztof Kozlowski
<krzysztof.kozlowski@linaro.org> wrote:
>
> On 27/07/2022 11:00, Lad, Prabhakar wrote:
> > Hi Krzysztof,
> >
> > On Wed, Jul 27, 2022 at 9:53 AM Krzysztof Kozlowski
> > <krzysztof.kozlowski@linaro.org> wrote:
> >>
> >> On 26/07/2022 20:06, Lad Prabhakar wrote:
> >>> Ignore the ARM renesas.yaml schema if the board is RZ/Five SMARC EVK
> >>> (RISC-V arch).
> >>>
> >>> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> >>> ---
> >>>  Documentation/devicetree/bindings/arm/renesas.yaml | 9 +++++++++
> >>>  1 file changed, 9 insertions(+)
> >>>
> >>> diff --git a/Documentation/devicetree/bindings/arm/renesas.yaml b/Documentation/devicetree/bindings/arm/renesas.yaml
> >>> index ff80152f092f..f646df1a23af 100644
> >>> --- a/Documentation/devicetree/bindings/arm/renesas.yaml
> >>> +++ b/Documentation/devicetree/bindings/arm/renesas.yaml
> >>> @@ -9,6 +9,15 @@ title: Renesas SH-Mobile, R-Mobile, and R-Car Platform Device Tree Bindings
> >>>  maintainers:
> >>>    - Geert Uytterhoeven <geert+renesas@glider.be>
> >>>
> >>> +# We want to ignore this schema if the board is of RISC-V arch
> >>> +select:
> >>> +  not:
> >>> +    properties:
> >>> +      compatible:
> >>> +        contains:
> >>> +          items:
> >>> +            - const: renesas,r9a07g043f01
> >>
> >> Second issue - why not renesas,r9a07g043?
> >>
> > We have two R9A07G043 SOC'S one is based on ARM64 and other on RISC-V.
> >
> > RZ/G2UL ARM64:
> > Type-1 Part Number: R9A07G043U11GBG#BC0
> > Type-2 Part Number: R9A07G043U12GBG#BC0
> >
> > RZ/Five RISCV:
> > 13 x 13 mm Package Part Number: R9A07G043F01GBG#BC0
> >
> > So to differentiate in ARM schema I am using  renesas,r9a07g043f01.
>
> What is the point to keep then r9a07g043 fallback? The two SoCs are not
> compatible at all, so they must not use the same fallback.
>
Agreed, I wanted to keep it consistent with what was done with ARM64
(since both the SoCs shared R9A07G043 part number).

Geert - What are your thoughts on the above?

Cheers,
Prabhakar

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