linux-kernel - Re: [PATCH v3 1/2] dt-bindings: riscv: add Milk-V Duo S board compatibles

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Date: Wed, 10 Apr 2024 18:17:14 +0800
From: Inochi Amaoto <inochiama@...look.com>
To: Michael Opdenacker <michael.opdenacker@...tlin.com>, 
	Inochi Amaoto <inochiama@...look.com>, Conor Dooley <conor@...nel.org>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Chen Wang <unicorn_wang@...look.com>, 
	Paul Walmsley <paul.walmsley@...ive.com>, Palmer Dabbelt <palmer@...belt.com>, 
	Albert Ou <aou@...s.berkeley.edu>, Chao Wei <chao.wei@...hgo.com>
Cc: linux-riscv@...ts.infradead.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/2] dt-bindings: riscv: add Milk-V Duo S board
 compatibles

On Wed, Apr 10, 2024 at 09:55:17AM +0200, Michael Opdenacker wrote:
> Hi Inochi
> 
> Thanks for the reviews!
> 
> On 4/10/24 at 09:19, Inochi Amaoto wrote:
> > On Wed, Apr 10, 2024 at 08:22:53AM +0200, michael.opdenacker@...tlin.com wrote:
> > > From: Michael Opdenacker <michael.opdenacker@...tlin.com>
> > > 
> > > Document the compatible strings for the Milk-V Duo S board[1] which uses
> > > the SOPHGO SG2000 SoC, compatible with the SOPHGO CV1800B SoC[2].
> > > 
> > > Link: https://milkv.io/duo-s [1]
> > > Link: https://en.sophgo.com/product/introduce/cv180xB.html [2]
> > > 
> > > Signed-off-by: Michael Opdenacker <michael.opdenacker@...tlin.com>
> > > ---
> > >   Documentation/devicetree/bindings/riscv/sophgo.yaml | 1 +
> > >   1 file changed, 1 insertion(+)
> > > 
> > > diff --git a/Documentation/devicetree/bindings/riscv/sophgo.yaml b/Documentation/devicetree/bindings/riscv/sophgo.yaml
> > > index 9bc813dad098..1837bc550056 100644
> > > --- a/Documentation/devicetree/bindings/riscv/sophgo.yaml
> > > +++ b/Documentation/devicetree/bindings/riscv/sophgo.yaml
> > > @@ -21,6 +21,7 @@ properties:
> > >         - items:
> > >             - enum:
> > >                 - milkv,duo
> > > +              - milkv,duos
> > >             - const: sophgo,cv1800b
> > Why not adding sg2000 property? They are different series.
> > IIRC, it at least a cv1813h not cv1800b. I suggest checking
> > the vendor SDK to get the right board compatibles.
> 
> Here's what there was in the vendor provided DTB, if I noted it correctly:
> compatible = "cvitek,cv181x";
> 
> Cheers
> Michael

That's true, the chipcode can be only see in the build script or
the board dts. You can use this as a base. For example, sg2000 
can be something like: "sophgo,sg2000", "sophgo,cv1813h". 
But in fact, I do not prefer to add "sophgo,cv1813h". Because
sg2000 can also boot as an aarch64 board, but cv1813h can't.