netdev - Re: [PATCH net-next 01/14] arm64: dts: mediatek: mt7986: introduce ethernet nodes

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Message-ID: <YnlC3jvYarpV6BP1@lore-desk>
Date:   Mon, 9 May 2022 18:35:42 +0200
From:   Lorenzo Bianconi <lorenzo@...nel.org>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     netdev@...r.kernel.org, nbd@....name, john@...ozen.org,
        sean.wang@...iatek.com, Mark-MC.Lee@...iatek.com,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, Sam.Shih@...iatek.com,
        linux-mediatek@...ts.infradead.org, devicetree@...r.kernel.org,
        robh@...nel.org
Subject: Re: [PATCH net-next 01/14] arm64: dts: mediatek: mt7986: introduce
 ethernet nodes

> > +&eth {
> > +	status = "okay";
> > +
> > +	gmac0: mac@0 {
> > +		compatible = "mediatek,eth-mac";
> > +		reg = <0>;
> > +		phy-mode = "2500base-x";
> > +
> > +		fixed-link {
> > +			speed = <2500>;
> > +			full-duplex;
> > +			pause;
> > +		};
> > +	};
> > +
> > +	gmac1: mac@1 {
> > +		compatible = "mediatek,eth-mac";
> > +		reg = <1>;
> > +		phy-mode = "2500base-x";
> > +
> > +		fixed-link {
> > +			speed = <2500>;
> > +			full-duplex;
> > +			pause;
> > +		};
> > +	};
> 
> Are both connected to the switch? It just seems unusual two have two
> fixed-link ports.

afaik mac design supports autoneg only in 10M/100M/1G mode and mt7986 gmac1
is connected to a 2.5Gbps phy on mt7986-ref board.

Regards,
Lorenzo

> 
> 	   Andrew

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