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Date:   Tue, 12 May 2020 09:51:35 -0500
From:   Rob Herring <robh@...nel.org>
To:     Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc:     andrew@...n.ch, f.fainelli@...il.com,
        linux-amlogic@...ts.infradead.org, devicetree@...r.kernel.org,
        jianxin.pan@...ogic.com, davem@...emloft.net,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH RFC v2 01/11] dt-bindings: net: meson-dwmac: Add the
 amlogic,rx-delay-ns property

On Wed, Apr 29, 2020 at 10:16:34PM +0200, Martin Blumenstingl wrote:
> The PRG_ETHERNET registers on Meson8b and newer SoCs can add an RX
> delay. Add a property with the known supported values so it can be
> configured according to the board layout.
> 
> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
> ---
>  .../bindings/net/amlogic,meson-dwmac.yaml           | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml b/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml
> index ae91aa9d8616..8d851f59d9f2 100644
> --- a/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml
> +++ b/Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml
> @@ -67,6 +67,19 @@ allOf:
>              PHY and MAC are adding a delay).
>              Any configuration is ignored when the phy-mode is set to "rmii".
>  
> +        amlogic,rx-delay-ns:
> +          $ref: /schemas/types.yaml#definitions/uint32

Don't need to define the type when in standard units.

> +          enum:
> +            - 0
> +            - 2
> +          description:
> +            The internal RGMII RX clock delay (provided by this IP block) in
> +            nanoseconds. When phy-mode is set to "rgmii" then the RX delay
> +            should be explicitly configured. When not configured a fallback of
> +            0ns is used. When the phy-mode is set to either "rgmii-id" or

'default: 0' expresses this.

> +            "rgmii-rxid" the RX clock delay is already provided by the PHY.
> +            Any configuration is ignored when the phy-mode is set to "rmii".
> +
>  properties:
>    compatible:
>      additionalItems: true
> -- 
> 2.26.2
> 

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