netdev - Re: [PATCH net] net: dsa: mv88e6xxx: Set correct interface mode for CPU/DSA ports

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Date:   Wed, 29 May 2019 11:12:34 +1000
From:   Greg Ungerer <gerg@...nel.org>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH net] net: dsa: mv88e6xxx: Set correct interface mode for
 CPU/DSA ports

Hi Andrew,

On 28/5/19 11:17 pm, Andrew Lunn wrote:
>> My hardware has the CPU port on 9, and it is SGMII. The existing working
>> devicetree setup I used is:
>>
>>                         port@9 {
>>                                  reg = <9>;
>>                                  label = "cpu";
>>                                  ethernet = <&eth0>;
>>                                  fixed-link {
>>                                          speed = <1000>;
>>                                          full-duplex;
>>                                  };
>>                          };
> 
> Hi Greg
> 
> You might need to set the phy-mode to SGMII. I'm surprised you are
> using SGMII, not 1000Base-X. Do you have a PHY connected?

No, no PHY connected. Direct Armada 380 to 6390 switch with SGMII.

Adding

   phy-mode = "sgmii";

to that port fixes it.

Thanks!
Greg