linux-kernel - Re: [RFC 1/3] dt-bindings: riscv: Add StarFive JH7110S SoC and VisionFive 2 Lite board

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Message-ID: <20250822-rascal-geometry-83c35926ea7e@spud>
Date: Fri, 22 Aug 2025 17:37:04 +0100
From: Conor Dooley <conor@...nel.org>
To: Hal Feng <hal.feng@...rfivetech.com>
Cc: Conor Dooley <conor+dt@...nel.org>,
	Emil Renner Berthing <emil.renner.berthing@...onical.com>,
	Heinrich Schuchardt <heinrich.schuchardt@...onical.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Palmer Dabbelt <palmer@...belt.com>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-riscv@...ts.infradead.org" <linux-riscv@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RFC 1/3] dt-bindings: riscv: Add StarFive JH7110S SoC and
 VisionFive 2 Lite board

On Fri, Aug 22, 2025 at 07:37:29AM +0000, Hal Feng wrote:
> > On 22.08.25 02:17, Conor Dooley wrote:
> > On Thu, Aug 21, 2025 at 06:09:28PM +0800, Hal Feng wrote:
> > > Add device tree bindings for the StarFive JH7110S SoC and the
> > > VisionFive 2 Lite board equipped with it.
> > >
> > > JH7110S SoC is an industrial SoC which can run at -40~85 degrees
> > > centigrade and up to 1.25GHz. Its CPU cores and peripherals are mostly
> > > similar to those of the JH7110 SoC.
> > 
> > How "mostly" is mostly? Are there memory map or capability differences?
> 
> To be precise, the CPU cores and peripherals are the same as those of the
> JH7110 SoC. I will improve the commit description in the next version.

Ye, please do. The complete lack of differences other than thermals
and cpu performance is what allows you to use all the same compatibles
for the peripherals after all!

> 
> Here are the differences between them: 
> JH7110 supports 0~70 degrees centigrade and up to 1.5GHz.
> JH7110S supports -40~85 degrees centigrade and up to 1.25GHz.
> 
> Best regards,
> Hal
> 
> > 
> > >
> > > Signed-off-by: Hal Feng <hal.feng@...rfivetech.com>
> > > ---
> > >  Documentation/devicetree/bindings/riscv/starfive.yaml | 5 +++++
> > >  1 file changed, 5 insertions(+)
> > >
> > > diff --git a/Documentation/devicetree/bindings/riscv/starfive.yaml
> > > b/Documentation/devicetree/bindings/riscv/starfive.yaml
> > > index 7ef85174353d..a2952490709f 100644
> > > --- a/Documentation/devicetree/bindings/riscv/starfive.yaml
> > > +++ b/Documentation/devicetree/bindings/riscv/starfive.yaml
> > > @@ -33,6 +33,11 @@ properties:
> > >                - starfive,visionfive-2-v1.3b
> > >            - const: starfive,jh7110
> > >
> > > +      - items:
> > > +          - enum:
> > > +              - starfive,visionfive-2-lite
> > > +          - const: starfive,jh7110s
> > > +
> > >  additionalProperties: true
> > >
> > >  ...
> > > --
> > > 2.43.2
> > >
> 

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