netdev - Re: [PATCH net-next v2 3/4] dt-bindings: net: Add RGMII internal delay for DP83869

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Message-ID: <20200520135624.GC652285@lunn.ch>
Date:   Wed, 20 May 2020 15:56:24 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Dan Murphy <dmurphy@...com>
Cc:     f.fainelli@...il.com, hkallweit1@...il.com, davem@...emloft.net,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH net-next v2 3/4] dt-bindings: net: Add RGMII internal
 delay for DP83869

On Wed, May 20, 2020 at 07:18:34AM -0500, Dan Murphy wrote:
> Add the internal delay values into the header and update the binding
> with the internal delay properties.
> 
> Signed-off-by: Dan Murphy <dmurphy@...com>
> ---
>  .../devicetree/bindings/net/ti,dp83869.yaml    | 16 ++++++++++++++++
>  include/dt-bindings/net/ti-dp83869.h           | 18 ++++++++++++++++++
>  2 files changed, 34 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/net/ti,dp83869.yaml b/Documentation/devicetree/bindings/net/ti,dp83869.yaml
> index 5b69ef03bbf7..344015ab9081 100644
> --- a/Documentation/devicetree/bindings/net/ti,dp83869.yaml
> +++ b/Documentation/devicetree/bindings/net/ti,dp83869.yaml
> @@ -64,6 +64,20 @@ properties:
>         Operational mode for the PHY.  If this is not set then the operational
>         mode is set by the straps. see dt-bindings/net/ti-dp83869.h for values
>  
> +  ti,rx-internal-delay:
> +    $ref: /schemas/types.yaml#definitions/uint32
> +    description: |
> +      RGMII Receive Clock Delay - see dt-bindings/net/ti-dp83869.h
> +      for applicable values. Required only if interface type is
> +      PHY_INTERFACE_MODE_RGMII_ID or PHY_INTERFACE_MODE_RGMII_RXID.

Hi Dan

Having it required with PHY_INTERFACE_MODE_RGMII_ID or
PHY_INTERFACE_MODE_RGMII_RXID is pretty unusual. Normally these
properties are used to fine tune the delay, if the default of 2ns does
not work.

    Andrew