linux-kernel - Re: [PATCH 4/4] dt-bindings: net: adin: document 1588 TX/RX SOP bindings

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Date:   Thu, 16 Jan 2020 14:43:30 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Alexandru Ardelean <alexandru.ardelean@...log.com>
Cc:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, davem@...emloft.net,
        f.fainelli@...il.com, hkallweit1@...il.com
Subject: Re: [PATCH 4/4] dt-bindings: net: adin: document 1588 TX/RX SOP
 bindings

> +  adi,1588-rx-sop-delays-cycles:
> +    allOf:
> +      - $ref: /schemas/types.yaml#definitions/uint8-array
> +      - items:
> +          - minItems: 3
> +            maxItems: 3
> +    description: |
> +      Enables Start Packet detection (SOP) for received IEEE 1588 time stamp
> +      controls, and configures the number of cycles (of the MII RX_CLK clock)
> +      to delay the indication of RX SOP frames for 10/100/1000 BASE-T links.
> +      The first element (in the array) configures the delay for 10BASE-T,
> +      the second for 100BASE-T, and the third for 1000BASE-T.

Do you know the clock frequency? It would be much better to express
this in ns, as with adi,1588-tx-sop-delays-ns.

> @@ -62,5 +116,11 @@ examples:
>              reg = <1>;
>  
>              adi,fifo-depth-bits = <16>;
> +
> +            adi,1588-rx-sop-delays-cycles = [ 00 00 00 ];
> +            adi,1588-rx-sop-pin-name = "int_n";
> +
> +            adi,1588-tx-sop-delays-ns = [ 00 08 10 ];

10 is not a multiple of 8!

   Andrew