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References: <20230116103926.276869-1-clement.leger@bootlin.com> <20230116103926.276869-5-clement.leger@bootlin.com>
In-Reply-To: <20230116103926.276869-5-clement.leger@bootlin.com>
From:   Geert Uytterhoeven <geert@linux-m68k.org>
Date:   Mon, 16 Jan 2023 13:27:42 +0100
Message-ID: <CAMuHMdVsa4t61AOnEHzuda7czE1fk-16-R8fXsp-MB3hZMJTEQ@mail.gmail.com>
Subject: Re: [PATCH net-next 4/6] dt-bindings: net: renesas,rzn1-gmac:
 Document RZ/N1 GMAC support
To:     =?UTF-8?B?Q2zDqW1lbnQgTMOpZ2Vy?= <clement.leger@bootlin.com>
Cc:     Sergey Shtylyov <s.shtylyov@omp.ru>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Geert Uytterhoeven <geert+renesas@glider.be>,
        Magnus Damm <magnus.damm@gmail.com>,
        Giuseppe Cavallaro <peppe.cavallaro@st.com>,
        Alexandre Torgue <alexandre.torgue@foss.st.com>,
        Jose Abreu <joabreu@synopsys.com>,
        Maxime Coquelin <mcoquelin.stm32@gmail.com>,
        Russell King <linux@armlinux.org.uk>,
        Wong Vee Khee <veekhee@apple.com>,
        Kurt Kanzenbach <kurt@linutronix.de>,
        Revanth Kumar Uppala <ruppala@nvidia.com>,
        Tan Tee Min <tee.min.tan@linux.intel.com>,
        Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
        Herve Codina <herve.codina@bootlin.com>,
        =?UTF-8?Q?Miqu=C3=A8l_Raynal?= <miquel.raynal@bootlin.com>,
        Milan Stevanovic <milan.stevanovic@se.com>,
        Jimmy Lalande <jimmy.lalande@se.com>,
        Pascal Eberhard <pascal.eberhard@se.com>,
        Mohammad Athari Bin Ismail <mohammad.athari.ismail@intel.com>,
        Jon Hunter <jonathanh@nvidia.com>, netdev@vger.kernel.org,
        linux-renesas-soc@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org,
        linux-stm32@st-md-mailman.stormreply.com,
        linux-arm-kernel@lists.infradead.org
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Hi Clément,

Thanks for your patch!

On Mon, Jan 16, 2023 at 11:37 AM Clément Léger
<clement.leger@bootlin.com> wrote:
> Add "renesas,rzn1-gmac" binding documention which is compatible which

documentation

> "snps,dwmac" compatible driver but uses a custom PCS to communicate
> with the phy.
>
> Signed-off-by: Clément Léger <clement.leger@bootlin.com>
> ---
>  .../bindings/net/renesas,rzn1-gmac.yaml       | 71 +++++++++++++++++++
>  1 file changed, 71 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/net/renesas,rzn1-gmac.yaml
>
> diff --git a/Documentation/devicetree/bindings/net/renesas,rzn1-gmac.yaml b/Documentation/devicetree/bindings/net/renesas,rzn1-gmac.yaml
> new file mode 100644
> index 000000000000..effb9a312832
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/renesas,rzn1-gmac.yaml
> @@ -0,0 +1,71 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/net/renesas,rzn1-gmac.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Renesas GMAC1 Device Tree Bindings
> +
> +maintainers:
> +  - Clément Léger <clement.leger@bootlin.com>
> +
> +select:
> +  properties:
> +    compatible:
> +      contains:
> +        enum:
> +          - renesas,r9a06g032-gmac
> +          - renesas,rzn1-gmac
> +  required:
> +    - compatible
> +
> +allOf:
> +  - $ref: "snps,dwmac.yaml#"
> +
> +properties:
> +  compatible:
> +    additionalItems: true
> +    maxItems: 3
> +    items:
> +      - enum:
> +          - renesas,r9a06g032-gmac
> +          - renesas,rzn1-gmac
> +    contains:
> +      enum:
> +        - snps,dwmac

Why not just

    items:
      - enum:
          - renesas,r9a06g032-gmac
          - renesas,rzn1-gmac
          - snps,dwmac

?

> +examples:
> +  - |
> +    #include <dt-bindings/clock/r9a06g032-sysctrl.h>
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +    ethernet@44000000 {
> +      compatible = "renesas,rzn1-gmac";

Documentation/devicetree/bindings/net/renesas,rzn1-gmac.example.dtb:
ethernet@44000000: compatible: ['renesas,rzn1-gmac'] does not contain
items matching the given schema

> +      reg = <0x44000000 0x2000>;
> +      interrupt-parent = <&gic>;
> +      interrupts = <GIC_SPI 34 IRQ_TYPE_LEVEL_HIGH>,
> +             <GIC_SPI 36 IRQ_TYPE_LEVEL_HIGH>,
> +             <GIC_SPI 35 IRQ_TYPE_LEVEL_HIGH>;
> +      interrupt-names = "macirq", "eth_wake_irq", "eth_lpi";
> +      clock-names = "stmmaceth";
> +      clocks = <&sysctrl R9A06G032_HCLK_GMAC0>;
> +      snps,multicast-filter-bins = <256>;
> +      snps,perfect-filter-entries = <128>;
> +      tx-fifo-depth = <2048>;
> +      rx-fifo-depth = <4096>;
> +      pcs-handle = <&mii_conv1>;
> +      phy-mode = "mii";
> +    };
> +
> +...

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds