netdev - Re: [PATCH 1/2] Documentation: devicetree: change the mediatek ethernet compatible string

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Message-ID: <20170127224105.e6di34pd3dwgn2hr@rob-hp-laptop>
Date:   Fri, 27 Jan 2017 16:41:05 -0600
From:   Rob Herring <robh@...nel.org>
To:     John Crispin <john@...ozen.org>
Cc:     Matthias Brugger <matthias.bgg@...il.com>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        Sean Wang <sean.wang@...iatek.com>, devicetree@...r.kernel.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH 1/2] Documentation: devicetree: change the mediatek
 ethernet compatible string

On Wed, Jan 25, 2017 at 09:20:54AM +0100, John Crispin wrote:
> When the binding was defined, I was not aware that mt2701 was an earlier
> version of the SoC. For sake of consistency, the ethernet driver should
> use mt2701 inside the compat string as this is the earliest SoC with the
> ethernet core.
> 
> The ethernet driver is currently of no real use until we finish and
> upstream the DSA driver. There are no users of this binding yet. It should
> be safe to fix this now before it is too late and we need to provide
> backward compatibility for the mt7623-eth compat string.

Thanks for the explanation.

> Reported-by: Sean Wang <sean.wang@...iatek.com>
> Signed-off-by: John Crispin <john@...ozen.org>
> ---
>  Documentation/devicetree/bindings/net/mediatek-net.txt |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/net/mediatek-net.txt b/Documentation/devicetree/bindings/net/mediatek-net.txt
> index c010faf..c7194e8 100644
> --- a/Documentation/devicetree/bindings/net/mediatek-net.txt
> +++ b/Documentation/devicetree/bindings/net/mediatek-net.txt
> @@ -7,7 +7,7 @@ have dual GMAC each represented by a child node..
>  * Ethernet controller node
>  
>  Required properties:
> -- compatible: Should be "mediatek,mt7623-eth"
> +- compatible: Should be "mediatek,mt2701-eth"

You should have both strings with 2701 being last. That way if you ever 
find a difference in the 7623, you don't need a DT update to fix it.

>  - reg: Address and length of the register set for the device
>  - interrupts: Should contain the three frame engines interrupts in numeric
>  	order. These are fe_int0, fe_int1 and fe_int2.
> -- 
> 1.7.10.4
>