ClearFog Base -- "status: no carrier" for mvneta1

[glenn]

Hi Luiz and Marcin,

Thank you for taking an interest in this.

I have looked into the problem further (Google is your friend) and made progress. After modification of the u-boot source before build, the message “status: no carrier” for the second ethernet port no longer appears . The recipe is detailed in the last post in this thread: http://forum.solid-run.com/linux-kernel-and-bootloaders-f34/port-light-is-always-on-does-not-work-t3074.html <http://forum.solid-run.com/linux-kernel-and-bootloaders-f34/port-light-is-always-on-does-not-work-t3074.html>. 

It was a surprise to me that modifying u-boot code affected the functioning of the ethernet after control was passed to the OS. Apparently some functionality that is built into u-boot continues to be used by the OS.

In addition to the changes in u-boot mentioned above, the armada-388-clearfog-base.dts was edited to allow the serial console to function. The second line in

serial at 12000 {
                compatible = "marvell,armada-38x-uart”;

was changed to 

                compatible = "snps,dw-apb-uart”; 

I’m thinking the reason that that enabled the serial console is that FreeBSD doesn’t have a driver that responds to "marvell,armada-38x-uart” but does have one that responds to "snps,dw-apb-uart”.

Glenn

> Date: Tue, 2 Oct 2018 11:57:32 -0300
> From: Luiz Otavio O Souza <lists.br at gmail.com>
> To: Marcin Wojtas <mw at semihalf.com>
> Cc: pygr at sonic.net, "freebsd-arm at freebsd.org"
> 	<freebsd-arm at freebsd.org>
> Subject: Re: ClearFog Base -- "status: no carrier" for mvneta1
> Message-ID:
> 	<CAB=2f8z0GumRUQB7gbV4wLLVuk6BRf3pu6JSAP3sOhpoXdstsw at mail.gmail.com>
> Content-Type: text/plain; charset="UTF-8"
> 
> On Tue, 2 Oct 2018 at 00:43, Marcin Wojtas wrote:
>> 
>> Hi Glenn,
>> 
>> I can see, that armada-388-clearfog-base.dts connects eth1 to a PHY via MDIO.
>> Unfortunately my Clearfog boards have the SFP cage connected only to
>> the SGMII lanes only (no PHY).
>> 
>> Can you please try to boot with armada-388-clearfog.dts, where the SFP
>> cage is configured as the 'fixed-link' and let know?
> 
> I don't have the Clearfog Base here, but this board has the PHY1 reset
> connected to GPIO pin 19, you probably want to check this too.
> 
> Luiz
>