linux-kernel - Re: [PATCH v4 07/10] dt-bindings: interrupt-controller: Add RISC-V advanced PLIC

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Date:   Thu, 15 Jun 2023 11:17:16 +0530
From:   Anup Patel <apatel@...tanamicro.com>
To:     Conor Dooley <conor@...nel.org>
Cc:     Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <maz@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Robin Murphy <robin.murphy@....com>,
        Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Atish Patra <atishp@...shpatra.org>,
        Andrew Jones <ajones@...tanamicro.com>,
        Saravana Kannan <saravanak@...gle.com>,
        Anup Patel <anup@...infault.org>,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, iommu@...ts.linux.dev
Subject: Re: [PATCH v4 07/10] dt-bindings: interrupt-controller: Add RISC-V
 advanced PLIC

On Thu, Jun 15, 2023 at 12:57 AM Conor Dooley <conor@...nel.org> wrote:
>
> Hey Anup,
>
> Mostly looks good, once minor comment.
>
> On Tue, Jun 13, 2023 at 09:04:12PM +0530, Anup Patel wrote:
>
> > +  riscv,children:
> > +    $ref: /schemas/types.yaml#/definitions/phandle-array
> > +    minItems: 1
> > +    maxItems: 1024
> > +    items:
> > +      maxItems: 1
> > +    description:
> > +      A list of child APLIC domains for the given APLIC domain. Each child
> > +      APLIC domain is assigned a child index in increasing order, with the
> > +      first child APLIC domain assigned child index 0. The APLIC domain child
> > +      index is used by firmware to delegate interrupts from the given APLIC
> > +      domain to a particular child APLIC domain.
> > +
> > +  riscv,delegation:
> > +    $ref: /schemas/types.yaml#/definitions/phandle-array
> > +    minItems: 1
> > +    maxItems: 1024
> > +    items:
> > +      items:
> > +        - description: child APLIC domain phandle
> > +        - description: first interrupt number of the parent APLIC domain (inclusive)
> > +        - description: last interrupt number of the parent APLIC domain (inclusive)
> > +    description:
> > +      A interrupt delegation list where each entry is a triple consisting
> > +      of child APLIC domain phandle, first interrupt number of the parent
> > +      APLIC domain, and last interrupt number of the parent APLIC domain.
> > +      Firmware must configure interrupt delegation registers based on
> > +      interrupt delegation list.
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - interrupt-controller
> > +  - "#interrupt-cells"
> > +  - riscv,num-sources
> > +
> > +anyOf:
> > +  - required:
> > +      - interrupts-extended
> > +  - required:
> > +      - msi-parent
>
> Not sure if you missed this from the last version, but I asked if we
> needed a
>         dependencies:
>           riscv,delegate: [ riscv,children ]
>
> IOW, I don't think it is valid to have a delegation without having
> children?

Ahh, yes. I missed this one. I will update in the next revision.

>
> Otherwise,
> Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>
>
> Cheers,
> Conor.

Regards,
Anup