linux-kernel - Re: [PATCH v2 1/8] dt-bindings: riscv: Add StarFive JH7110 SoC and VisionFive2 board

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Message-ID: <CAJM55Z-zgR=LKqtg4ioj9Ez1CT7wchrNWWPVT5XAMPF736OcRA@mail.gmail.com>
Date:   Thu, 24 Nov 2022 10:20:32 +0100
From:   Emil Renner Berthing <emil.renner.berthing@...onical.com>
To:     Hal Feng <hal.feng@...rfivetech.com>
Cc:     "linux-riscv@...ts.infradead.org" <linux-riscv@...ts.infradead.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Conor Dooley <conor@...nel.org>,
        Palmer Dabbelt <palmer@...belt.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Ben Dooks <ben.dooks@...ive.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <maz@...nel.org>, Stephen Boyd <sboyd@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 1/8] dt-bindings: riscv: Add StarFive JH7110 SoC and
 VisionFive2 board

On Thu, 24 Nov 2022 at 06:56, Hal Feng <hal.feng@...rfivetech.com> wrote:
>
> On Sat, 19 Nov 2022 01:28:48 +0800, Emil Renner Berthing wrote:
> > On Fri, 18 Nov 2022 at 02:17, Hal Feng <hal.feng@...rfivetech.com> wrote:
> > >
> > > From: Emil Renner Berthing <kernel@...il.dk>
> > >
> > > Add device tree bindings for the StarFive JH7110 RISC-V SoC [1]
> > > and the VisionFive2 board [2] equipped with it.
> > >
> > > [1]: https://doc-en.rvspace.org/Doc_Center/jh7110.html
> > > [2]: https://doc-en.rvspace.org/Doc_Center/visionfive_2.html
> > >
> > > Signed-off-by: Emil Renner Berthing <kernel@...il.dk>
> > > Signed-off-by: Hal Feng <hal.feng@...rfivetech.com>
> > > ---
> > >  Documentation/devicetree/bindings/riscv/starfive.yaml | 4 ++++
> > >  1 file changed, 4 insertions(+)
> > >
> > > diff --git a/Documentation/devicetree/bindings/riscv/starfive.yaml b/Documentation/devicetree/bindings/riscv/starfive.yaml
> > > index 5b36243fd674..64008c57e31f 100644
> > > --- a/Documentation/devicetree/bindings/riscv/starfive.yaml
> > > +++ b/Documentation/devicetree/bindings/riscv/starfive.yaml
> > > @@ -22,6 +22,10 @@ properties:
> > >            - const: beagle,beaglev-starlight-jh7100-r0
> > >            - const: starfive,jh7100
> > >
> > > +      - items:
> > > +          - const: starfive,visionfive-v2
> >
> > I think StarFive has switched to just calling it VisionFive 2 and not
> > V2. Please check up on this before committing to the compatible
> > string.
> >
> > Also there are going to be different revisions of the VisionFive 2
> > board, so maybe consider adding eg. starfive,visionfive-2-v1.1 and
> > starfive,visionfive-2-v1,2b early.
>
> I checked that the official name of this board is "VisionFive 2". The
> board has version A and version B, which are different in gmac and phy
> chip. The version A board has one 1000M and one 100M Ethernet ports
> while the version B board has two 1000M Ethernet ports. In dts, they
> have different configuration parameters for gmac. So I would like to
> distinguish them by two compatibles as below in the next version.
>
>       - items:
>           - enum:
>               - starfive,visionfive-2-va
>               - starfive,visionfive-2-vb
>           - const: starfive,jh7110

Cool. Though the silkscreen on my board says "VisionFive 2 V1.2B" so I
think it would be less confusing if you used that as the model, and
"starfive,visionfive-2-v1.2b" as the compatible string for the board.


> Best regards,
> Hal
>
> >
> > > +          - const: starfive,jh7110
> > > +
> > >  additionalProperties: true
>