netdev - Re: [PATCH net-next 03/12] dt-bindings: net: dwmac-sun8i: Clean up clock delay chain descriptions

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Date:   Sun, 18 Mar 2018 12:21:44 +0300
From:   Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:     Chen-Yu Tsai <wens@...e.org>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Mark Brown <broonie@...nel.org>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, netdev@...r.kernel.org,
        Corentin Labbe <clabbe.montjoie@...il.com>,
        Icenowy Zheng <icenowy@...c.io>
Subject: Re: [PATCH net-next 03/12] dt-bindings: net: dwmac-sun8i: Clean up
 clock delay chain descriptions

Hello!

On 3/17/2018 12:28 PM, Chen-Yu Tsai wrote:

> The clock delay chains found in the glue layer for dwmac-sun8i are only
> used with RGMII PHYs. They are not intended for non-RGMII PHYs, such as
> MII external PHYs or the internal PHY. Also, a recent SoC has a smaller
> range of possible values for the delay chain.
> 
> This patch reformats the delay chain section of the device tree binding
> to make it clear that the delay chains only apply to RGMII PHYs, and
> make it easier to add the R40-specific bits later.
> 
> Signed-off-by: Chen-Yu Tsai <wens@...e.org>
> ---
>   Documentation/devicetree/bindings/net/dwmac-sun8i.txt | 11 +++++++----
>   1 file changed, 7 insertions(+), 4 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/net/dwmac-sun8i.txt b/Documentation/devicetree/bindings/net/dwmac-sun8i.txt
> index 3d6d5fa0c4d5..b8a3028d6c30 100644
> --- a/Documentation/devicetree/bindings/net/dwmac-sun8i.txt
> +++ b/Documentation/devicetree/bindings/net/dwmac-sun8i.txt
> @@ -28,10 +28,13 @@ Required properties:
>     - allwinner,sun8i-a83t-system-controller
>   
>   Optional properties:
> -- allwinner,tx-delay-ps: TX clock delay chain value in ps. Range value is 0-700. Default is 0)
> -- allwinner,rx-delay-ps: RX clock delay chain value in ps. Range value is 0-3100. Default is 0)
> -Both delay properties need to be a multiple of 100. They control the delay for
> -external PHY.
> +- allwinner,tx-delay-ps: TX clock delay chain value in ps.
> +			 Range is 0-700. Default is 0.
> +- allwinner,rx-delay-ps: RX clock delay chain value in ps.
> +			 Range is 0-3100. Default is 0.
> +Both delay properties need to be a multiple of 100. They control the
> +clock delay for external RGMII PHY. They are do apply to the internal

   s/are do/do not/?

> +PHY or external non-RGMII PHYs.
>   
>   Optional properties for the following compatibles:
>     - "allwinner,sun8i-h3-emac",

MBR, Sergei