netdev - Re: [PATCH net-next 3/3] dt-bindings: net: ethernet: Update mt7622 docs and dts to reflect the new phylink API

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Date:   Fri, 26 Jul 2019 07:19:56 +0000
From:   René van Dorst <opensource@...rst.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     netdev@...r.kernel.org, frank-w@...lic-files.de,
        sean.wang@...iatek.com, f.fainelli@...il.com,
        linux@...linux.org.uk, davem@...emloft.net, matthias.bgg@...il.com,
        vivien.didelot@...il.com, john@...ozen.org,
        linux-mediatek@...ts.infradead.org, linux-mips@...r.kernel.org,
        robh+dt@...nel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH net-next 3/3] dt-bindings: net: ethernet: Update mt7622
 docs and dts to reflect the new phylink API

Quoting Andrew Lunn <andrew@...n.ch>:

>> +	gmac0: mac@0 {
>> +		compatible = "mediatek,eth-mac";
>> +		reg = <0>;
>> +		phy-mode = "sgmii";
>> +
>> +		fixed-link {
>> +			speed = <2500>;
>> +			full-duplex;
>> +			pause;
>> +		};
>> +	};
>
> Hi René
>

Hi Andrew,

> SGMII and fixed-link is rather odd. Why do you need this combination?

BananaPi R64 has a RTL8367S 5+2-port switch, switch interfaces with  
the SOC by a
(H)SGMII and/or RGMII interface. SGMII is mainly used for the LAN ports and
RGMII for the WAN port.

I mimic the SDK software which puts SGMII interface in 2.5GBit  
fixed-link mode.
The RTL8367S switch code also put switch mac in forge 2.5GBit mode.

So this is the reason why I put a fixed-link mode here.

Greats,

René

>       Andrew