linux-kernel - Re: [PATCH v1 1/2] dt-bindings: net: motorcomm: Add pad driver strength cfg

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Message-ID: <fef3aed8-b664-4d36-94f5-266cea4c57a7@lunn.ch>
Date:   Wed, 26 Apr 2023 16:29:23 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Samin Guo <samin.guo@...rfivetech.com>
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        netdev@...r.kernel.org, Peter Geis <pgwipeout@...il.com>,
        Frank <Frank.Sae@...or-comm.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>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Yanhong Wang <yanhong.wang@...rfivetech.com>
Subject: Re: [PATCH v1 1/2] dt-bindings: net: motorcomm: Add pad driver
 strength cfg

On Wed, Apr 26, 2023 at 02:35:40PM +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.
> 
> Signed-off-by: Samin Guo <samin.guo@...rfivetech.com>
> ---
>  .../devicetree/bindings/net/motorcomm,yt8xxx.yaml      | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/net/motorcomm,yt8xxx.yaml b/Documentation/devicetree/bindings/net/motorcomm,yt8xxx.yaml
> index 157e3bbcaf6f..e648e486b6d8 100644
> --- a/Documentation/devicetree/bindings/net/motorcomm,yt8xxx.yaml
> +++ b/Documentation/devicetree/bindings/net/motorcomm,yt8xxx.yaml
> @@ -18,6 +18,16 @@ properties:
>        - ethernet-phy-id4f51.e91a
>        - ethernet-phy-id4f51.e91b
>  
> +  rx-clk-driver-strength:
> +    description: drive strength of rx_clk pad.
> +    enum: [ 0, 1, 2, 3, 4, 5, 6, 7 ]
> +    default: 3

What do the numbers mean? What are the units? mA?

     Andrew