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

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Date: Wed, 27 Mar 2024 08:54:30 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: 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>, Rob Herring <robh+dt@...nel.org>,
 Emil Renner Berthing <kernel@...il.dk>, Rob Herring <robh@...nel.org>,
 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>
Cc: 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 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.

>    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.

Best regards,
Krzysztof