netdev - Re: [PATCH v5 1/1] dt-bindings: net: starfive,jh7110-dwmac: Add StarFive JH8100 support

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Message-ID: <20240328204202.GA308290-robh@kernel.org>
Date: Thu, 28 Mar 2024 15:42:02 -0500
From: Rob Herring <robh@...nel.org>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc: Tan Chun Hau <chunhau.tan@...rfivetech.com>,
	"David S . Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Emil Renner Berthing <kernel@...il.dk>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Simon Horman <horms@...nel.org>,
	Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
	Andrew Halaney <ahalaney@...hat.com>,
	Jisheng Zhang <jszhang@...nel.org>,
	Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
	Russell King <rmk+kernel@...linux.org.uk>,
	Ley Foon Tan <leyfoon.tan@...rfivetech.com>,
	Jee Heng Sia <jeeheng.sia@...rfivetech.com>, netdev@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-stm32@...md-mailman.stormreply.com,
	linux-arm-kernel@...ts.infradead.org,
	linux-riscv@...ts.infradead.org
Subject: Re: [PATCH v5 1/1] dt-bindings: net: starfive,jh7110-dwmac: Add
 StarFive JH8100 support

On Wed, Mar 27, 2024 at 08:54:30AM +0100, Krzysztof Kozlowski wrote:
> On 27/03/2024 02:57, Tan Chun Hau wrote:
> > Add StarFive JH8100 dwmac support.
> > The JH8100 dwmac shares the same driver code as the JH7110 dwmac
> > and has only one reset signal.
> > 
> > Please refer to below:
> > 
> >   JH8100: reset-names = "stmmaceth";
> >   JH7110: reset-names = "stmmaceth", "ahb";
> >   JH7100: reset-names = "ahb";
> > 
> > Example usage of JH8100 in the device tree:
> > 
> > gmac0: ethernet@...30000 {
> >         compatible = "starfive,jh8100-dwmac",
> >                      "starfive,jh7110-dwmac",
> >                      "snps,dwmac-5.20";
> >         ...
> > };
> > 
> > Signed-off-by: Tan Chun Hau <chunhau.tan@...rfivetech.com>
> > ---
> >  .../devicetree/bindings/net/snps,dwmac.yaml   |  1 +
> >  .../bindings/net/starfive,jh7110-dwmac.yaml   | 29 +++++++++++++++----
> >  2 files changed, 25 insertions(+), 5 deletions(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
> > index 6b0341a8e0ea..a6d596b7dcf4 100644
> > --- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml
> > +++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
> > @@ -97,6 +97,7 @@ properties:
> >          - snps,dwxgmac-2.10
> >          - starfive,jh7100-dwmac
> >          - starfive,jh7110-dwmac
> > +        - starfive,jh8100-dwmac
> 
> I think that's not needed. You have there already your fallback.
> 
> >  
> >    reg:
> >      minItems: 1
> > diff --git a/Documentation/devicetree/bindings/net/starfive,jh7110-dwmac.yaml b/Documentation/devicetree/bindings/net/starfive,jh7110-dwmac.yaml
> > index 0d1962980f57..5805a58c55d1 100644
> > --- a/Documentation/devicetree/bindings/net/starfive,jh7110-dwmac.yaml
> > +++ b/Documentation/devicetree/bindings/net/starfive,jh7110-dwmac.yaml
> > @@ -18,6 +18,7 @@ select:
> >          enum:
> >            - starfive,jh7100-dwmac
> >            - starfive,jh7110-dwmac
> > +          - starfive,jh8100-dwmac
> 
> Same here, even more obvious.

Agreed.

> 
> >    required:
> >      - compatible
> >  
> > @@ -30,6 +31,10 @@ properties:
> >        - items:
> >            - const: starfive,jh7110-dwmac
> >            - const: snps,dwmac-5.20
> > +      - items:
> > +          - const: starfive,jh8100-dwmac
> > +          - const: starfive,jh7110-dwmac
> > +          - const: snps,dwmac-5.20
> >  
> >    reg:
> >      maxItems: 1
> > @@ -116,11 +121,25 @@ allOf:
> >            minItems: 3
> >            maxItems: 3
> >  
> > -        resets:
> > -          minItems: 2
> > -
> > -        reset-names:
> > -          minItems: 2
> > +      if:
> 
> I would personally avoid nesting if within if. It gets unreadable.
> Although Rob did not comment on this one, so I guess it is fine.

I normally agree, but here I suggested it as it looked to be the 
simplest option.

With the 2 other comments addressed,

Reviewed-by: Rob Herring <robh@...nel.org>