linux-kernel - Re: [PATCH RFC 1/2] dt-bindings: interrupt-controller: sifive,plic: Document Renesas RZ/Five SoC

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Date:   Fri, 24 Jun 2022 11:01:12 +0100
From:   "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <maz@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Sagar Kadam <sagar.kadam@...ive.com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        linux-riscv <linux-riscv@...ts.infradead.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Phil Edworthy <phil.edworthy@...esas.com>,
        Biju Das <biju.das.jz@...renesas.com>
Subject: Re: [PATCH RFC 1/2] dt-bindings: interrupt-controller: sifive,plic:
 Document Renesas RZ/Five SoC

Hi Geert,

Thank you for the review.

On Thu, Jun 9, 2022 at 10:42 AM Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
>
> Hi Prabhakar,
>
> On Tue, May 24, 2022 at 7:22 PM Lad Prabhakar
> <prabhakar.mahadev-lad.rj@...renesas.com> wrote:
> > Document Renesas RZ/Five (R9A07G043) SoC.
> >
> > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
>
> Thanks for your patch!
>
> > --- a/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml
> > +++ b/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml
> > @@ -28,7 +28,10 @@ description:
> >
> >    While the PLIC supports both edge-triggered and level-triggered interrupts,
> >    interrupt handlers are oblivious to this distinction and therefore it is not
> > -  specified in the PLIC device-tree binding.
> > +  specified in the PLIC device-tree binding for SiFive PLIC (and similar PLIC's),
> > +  but for the Renesas RZ/Five Soc (AX45MP AndesCore) which has NCEPLIC100 we need
> > +  to specify the interrupt type as the flow for EDGE interrupts is different
> > +  compared to LEVEL interrupts.
> >
> >    While the RISC-V ISA doesn't specify a memory layout for the PLIC, the
> >    "sifive,plic-1.0.0" device is a concrete implementation of the PLIC that
> > @@ -57,6 +60,7 @@ properties:
> >            - enum:
> >                - allwinner,sun20i-d1-plic
> >            - const: thead,c900-plic
> > +      - const: renesas-r9a07g043-plic
>
> renesas,r9a07g043-plic
>
Agreed.

> >
> >    reg:
> >      maxItems: 1
> > @@ -64,8 +68,7 @@ properties:
> >    '#address-cells':
> >      const: 0
> >
> > -  '#interrupt-cells':
> > -    const: 1
> > +  '#interrupt-cells': true
> >
> >    interrupt-controller: true
> >
> > @@ -91,6 +94,35 @@ required:
> >    - interrupts-extended
> >    - riscv,ndev
> >
> > +if:
> > +  properties:
> > +    compatible:
> > +      contains:
> > +        const: renesas-r9a07g043-plic
>
> renesas,r9a07g043-plic
>
ditto.

Cheers,
Prabhakar