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Date:   Fri, 26 May 2023 20:41:42 +0100
From:   Conor Dooley <conor@kernel.org>
To:     Samin Guo <samin.guo@starfivetech.com>
Cc:     linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
        netdev@vger.kernel.org, Peter Geis <pgwipeout@gmail.com>,
        Frank <Frank.Sae@motor-comm.com>,
        "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>,
        Andrew Lunn <andrew@lunn.ch>,
        Heiner Kallweit <hkallweit1@gmail.com>,
        Russell King <linux@armlinux.org.uk>,
        Yanhong Wang <yanhong.wang@starfivetech.com>
Subject: Re: [PATCH v3 1/2] dt-bindings: net: motorcomm: Add pad driver
 strength cfg
Message-ID: <20230526-glutinous-pristine-fed571235b80@spud>
References: <20230526090502.29835-1-samin.guo@starfivetech.com>
 <20230526090502.29835-2-samin.guo@starfivetech.com>
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On Fri, May 26, 2023 at 05:05:01PM +0800, Samin Guo wrote:
> The motorcomm phy (YT8531) supports the ability to adjust the drive
> strength of the rx_clk/rx_data, the value range of pad driver
> strength is 0 to 7.
>=20
> Signed-off-by: Samin Guo <samin.guo@starfivetech.com>
> ---
>  .../devicetree/bindings/net/motorcomm,yt8xxx.yaml    | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
>=20
> diff --git a/Documentation/devicetree/bindings/net/motorcomm,yt8xxx.yaml =
b/Documentation/devicetree/bindings/net/motorcomm,yt8xxx.yaml
> index 157e3bbcaf6f..29a1997a1577 100644
> --- a/Documentation/devicetree/bindings/net/motorcomm,yt8xxx.yaml
> +++ b/Documentation/devicetree/bindings/net/motorcomm,yt8xxx.yaml
> @@ -52,6 +52,18 @@ properties:
>        for a timer.
>      type: boolean
> =20
> +  motorcomm,rx-clk-driver-strength:
> +    description: drive strength of rx_clk pad.
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    enum: [ 0, 1, 2, 3, 4, 5, 6, 7 ]

I think you should use minimum & maximum instead of these listed out
enums. You have also had this comment since v1 & were reminded of it on
v2 by Krzysztof: "What do the numbers mean? What are the units? mA?"

This information should go into the binding, not sit in a thread on a
mailing list that noone will look at when trying to write a DT :(

Thanks,
Conor.

> +    default: 3
> +
> +  motorcomm,rx-data-driver-strength:
> +    description: drive strength of rx_data/rx_ctl rgmii pad.
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    enum: [ 0, 1, 2, 3, 4, 5, 6, 7 ]
> +    default: 3
> +
>    motorcomm,tx-clk-adj-enabled:
>      description: |
>        This configuration is mainly to adapt to VF2 with JH7110 SoC.
> --=20
> 2.17.1
>=20

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