linux-kernel - Re: [PATCH 3/5] dt-bindings: net: Add Loongson-1 DWMAC glue layer

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Date:   Mon, 14 Aug 2023 21:11:47 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Keguang Zhang <keguang.zhang@...il.com>, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-mips@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Lee Jones <lee@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Jose Abreu <joabreu@...opsys.com>,
        Serge Semin <Sergey.Semin@...kalelectronics.ru>
Subject: Re: [PATCH 3/5] dt-bindings: net: Add Loongson-1 DWMAC glue layer

On 12/08/2023 17:11, Keguang Zhang wrote:
> Add devicetree binding document for Loongson-1 DWMAC glue layer.
> 
> Signed-off-by: Keguang Zhang <keguang.zhang@...il.com>
> ---
>  .../bindings/net/loongson,ls1x-dwmac.yaml     | 98 +++++++++++++++++++
>  .../devicetree/bindings/net/snps,dwmac.yaml   |  2 +
>  2 files changed, 100 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/net/loongson,ls1x-dwmac.yaml
> 
> diff --git a/Documentation/devicetree/bindings/net/loongson,ls1x-dwmac.yaml b/Documentation/devicetree/bindings/net/loongson,ls1x-dwmac.yaml
> new file mode 100644
> index 000000000000..150799460599
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/loongson,ls1x-dwmac.yaml
> @@ -0,0 +1,98 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/net/loongson,ls1x-dwmac.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Loongson-1 DWMAC glue layer
> +
> +maintainers:
> +  - Keguang Zhang <keguang.zhang@...il.com>
> +
> +select:
> +  properties:
> +    compatible:
> +      contains:
> +        enum:
> +          - loongson,ls1b-dwmac
> +          - loongson,ls1c-dwmac
> +  required:
> +    - compatible
> +
> +properties:
> +  compatible:
> +    items:
> +      - enum:
> +          - loongson,ls1b-dwmac
> +          - loongson,ls1c-dwmac
> +      - const: snps,dwmac-3.50a
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  clock-names:
> +    const: stmmaceth

This should be list (items) with one const item.

> +
> +  interrupts:
> +    maxItems: 1
> +
> +  interrupt-names:
> +    const: macirq

Ditto

> +
> +  syscon:

Let me quote:

"Phandle to syscon device requires a vendor, descriptive name and a
description"

You only got description right.

> +    $ref: /schemas/types.yaml#/definitions/phandle
> +    description:
> +      Phandle to the syscon containing some extra configurations
> +      including PHY interface mode.
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - clock-names
> +  - interrupts
> +  - interrupt-names
> +  - phy-handle
> +  - phy-mode

Drop, it is not defined here and already required by snps,dwmac.

> +  - syscon
> +
> +allOf:
> +  - $ref: snps,dwmac.yaml#
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/loongson,ls1x-clk.h>
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +
> +    gmac0: ethernet@...10000 {
> +        compatible = "loongson,ls1b-dwmac", "snps,dwmac-3.50a";
> +        reg = <0x1fe10000 0x10000>;
> +
> +        clocks = <&clkc LS1X_CLKID_AHB>;
> +        clock-names = "stmmaceth";
> +
> +        interrupt-parent = <&intc1>;
> +        interrupts = <2 IRQ_TYPE_LEVEL_HIGH>;
> +        interrupt-names = "macirq";
> +
> +        phy-handle = <&phy0>;
> +        phy-mode = "mii";
> +
> +        snps,pbl = <1>;
> +        syscon = <&syscon>;
> +
> +        mdio {
> +            #address-cells = <1>;
> +            #size-cells = <0>;
> +            compatible = "snps,dwmac-mdio";
> +
> +            phy0: ethernet-phy@0 {
> +                reg = <0x0>;
> +            };
> +        };
> +    };
> diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
> index ddf9522a5dc2..e1a956cf171e 100644
> --- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml
> +++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
> @@ -66,6 +66,8 @@ properties:
>          - ingenic,x2000-mac
>          - loongson,ls2k-dwmac
>          - loongson,ls7a-dwmac
> +        - loongson,ls1b-dwmac
> +        - loongson,ls1c-dwmac

You should not need it. Isn't snps,dwmac-3.50a already there? Anyway,
not alphabetically ordered...

>          - qcom,qcs404-ethqos
>          - qcom,sa8775p-ethqos
>          - qcom,sc8280xp-ethqos

Best regards,
Krzysztof