netdev - Re: [PATCH v2 01/11] dt-bindings: net: add STM32MP13 compatible in documentation for stm32

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Date: Fri, 26 Apr 2024 14:16:55 -0500
From: Rob Herring <robh@...nel.org>
To: Christophe Roullier <christophe.roullier@...s.st.com>
Cc: "David S . Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	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>,
	Richard Cochran <richardcochran@...il.com>,
	Jose Abreu <joabreu@...opsys.com>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>, Marek Vasut <marex@...x.de>,
	netdev@...r.kernel.org, devicetree@...r.kernel.org,
	linux-stm32@...md-mailman.stormreply.com,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 01/11] dt-bindings: net: add STM32MP13 compatible in
 documentation for stm32

On Fri, Apr 26, 2024 at 02:56:57PM +0200, Christophe Roullier wrote:
> New STM32 SOC have 2 GMACs instances.
> GMAC IP version is SNPS 4.20.
> 
> Signed-off-by: Christophe Roullier <christophe.roullier@...s.st.com>
> ---
>  .../devicetree/bindings/net/stm32-dwmac.yaml  | 76 ++++++++++++++++---
>  1 file changed, 67 insertions(+), 9 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/net/stm32-dwmac.yaml b/Documentation/devicetree/bindings/net/stm32-dwmac.yaml
> index f2714b5b6cf4..b901a432dfa9 100644
> --- a/Documentation/devicetree/bindings/net/stm32-dwmac.yaml
> +++ b/Documentation/devicetree/bindings/net/stm32-dwmac.yaml
> @@ -22,18 +22,17 @@ select:
>          enum:
>            - st,stm32-dwmac
>            - st,stm32mp1-dwmac
> +          - st,stm32mp13-dwmac
>    required:
>      - compatible
>  
> -allOf:
> -  - $ref: snps,dwmac.yaml#
> -
>  properties:
>    compatible:
>      oneOf:
>        - items:
>            - enum:
>                - st,stm32mp1-dwmac
> +              - st,stm32mp13-dwmac
>            - const: snps,dwmac-4.20a
>        - items:
>            - enum:
> @@ -74,13 +73,16 @@ properties:
>  
>    st,syscon:
>      $ref: /schemas/types.yaml#/definitions/phandle-array
> +    description:

Why do you move the location of 'description'? It just increases the 
diff. My preference is description is either 1st or last and not in the 
middle.

> +      Should be phandle/offset pair. The phandle to the syscon node which
> +      encompases the glue register, the offset of the control register and
> +      the mask to set bitfield in control register
>      items:
> -      - items:
> +      - minItems: 2
> +        items:
>            - description: phandle to the syscon node which encompases the glue register
>            - description: offset of the control register
> -    description:
> -      Should be phandle/offset pair. The phandle to the syscon node which
> -      encompases the glue register, and the offset of the control register
> +          - description: field to set mask in register
>  
>    st,eth-clk-sel:
>      description:
> @@ -105,12 +107,38 @@ required:
>  
>  unevaluatedProperties: false
>  
> +allOf:
> +  - $ref: snps,dwmac.yaml#
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - st,stm32mp1-dwmac
> +              - st,stm32-dwmac
> +    then:
> +      properties:
> +        st,syscon:
> +          items:
> +            maxItems: 2
> +
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - st,stm32mp13-dwmac
> +    then:
> +      properties:
> +        st,syscon:
> +          items:
> +            minItems: 3
> +            maxItems: 3

Just minItems is needed.

> +
>  examples:
>    - |
>      #include <dt-bindings/interrupt-controller/arm-gic.h>
>      #include <dt-bindings/clock/stm32mp1-clks.h>
> -    #include <dt-bindings/reset/stm32mp1-resets.h>
> -    #include <dt-bindings/mfd/stm32h7-rcc.h>
>      //Example 1
>       ethernet0: ethernet@...0a000 {
>             compatible = "st,stm32mp1-dwmac", "snps,dwmac-4.20a";
> @@ -165,3 +193,33 @@ examples:
>             snps,pbl = <8>;
>             phy-mode = "mii";
>         };
> +
> +  - |
> +     //Example 4

I don't think it is worth a whole new example just for 1 property 
difference.

> +     ethernet3: ethernet@...0a000 {
> +           compatible = "st,stm32mp13-dwmac", "snps,dwmac-4.20a";
> +           reg = <0x5800a000 0x2000>;
> +           reg-names = "stmmaceth";
> +           interrupts-extended = <&intc GIC_SPI 62 IRQ_TYPE_LEVEL_HIGH>,
> +                                 <&exti 68 IRQ_TYPE_LEVEL_HIGH>;
> +           interrupt-names = "macirq",
> +                             "eth_wake_irq";
> +           clock-names = "stmmaceth",
> +                         "mac-clk-tx",
> +                         "mac-clk-rx",
> +                         "eth-ck",
> +                         "ptp_ref",
> +                         "ethstp";
> +           clocks = <&rcc ETHMAC>,
> +                    <&rcc ETHTX>,
> +                    <&rcc ETHRX>,
> +                    <&rcc ETHCK_K>,
> +                    <&rcc ETHPTP_K>,
> +                    <&rcc ETHSTP>;
> +           st,syscon = <&syscfg 0x4 0xff0000>;
> +           snps,mixed-burst;
> +           snps,pbl = <2>;
> +           snps,axi-config = <&stmmac_axi_config_1>;
> +           snps,tso;
> +           phy-mode = "rmii";
> +     };
> -- 
> 2.25.1
>