netdev - Re: DSA setup IMX6ULL and Marvell 88E6390 with 2 Ethernet Phys

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Date:   Thu, 13 Jun 2019 07:40:31 +0200
From:   Benjamin Beckmeyer <beb@...-engel.de>
To:     Andrew Lunn <andrew@...n.ch>
CC:     <netdev@...r.kernel.org>
Subject: Re: DSA setup IMX6ULL and Marvell 88E6390 with 2 Ethernet Phys - CPU
 Port is not working

>> thanks for your reply. You're right, both PHYs are 10/100.
>>
>> I already added a fixed-link like this:
>>
>> 			port@0 {
>> 				reg = <0>;
>> 				label = "cpu";
>> 				ethernet = <&fec1>;
>> 				phy-mode = "rmii";
>> 				phy-handle = <&switch0phy0>;
>>                                 fixed-link {
>>                                         speed = <100>;
>>                                         full-duplex;
>>                                 };
>> 			};
>>
>> I hope you mean that with fixed-phy? But this doesn't changed anything.
> You probably have multiple issues, and it is not going to work until
> you have them all solved.
>
> You can get access to the registers etc, using patches from:
>
> https://github.com/vivien/linux.git dsa/debugfs
>
> I've only seen the external MDIO bus on the 6390 used for C45 PHYs. So
> there is a chance the driver code for C22 is broken?
>
>       Andrew
>
Hi Andrew,
after you helped me a lot with my other custom board this board is now
up and running too. 

I deleted the whole MDIO part from the device tree except the external MDIO
part (mdio1) and set up the bridge.

For both boards I haven't tested the fiber (serdes) channels but I will 
soon. When I'm running into problems with that, I will contact the mailing 
list again. 

Thanks,
Benjamin