Fwd: Micrel KSZ9031RN PHY problem

[Guillermo Rodriguez Garcia]

Hello,

2016-04-19 9:11 GMT+02:00 Sascha Hauer <s.hauer at pengutronix.de>:
> Hi Guillermo,
>
> +Cc Philipp Zabel who ported the patch to barebox
>
> On Mon, Apr 18, 2016 at 04:49:47PM +0200, Guillermo Rodriguez Garcia wrote:
>> Hello all,
>>
>> I am playing with barebox on an Atmel SAMA5D3 Xplained board. It is
>> now working fine for the most part, however after updating to the
>> latest sources from git I found a problem that I had not seen before.
>>
>> This board has two Ethernet interfaces; eth0 uses a Micrel KSZ9031RN
>> PHY, and eth1 uses a Micrel KSZ8081RNB PHY.
>>
>> It seems that after release 2016.03.0, eth0 does not work anymore with
>> some routers. Specifically I found this problem with a Comtrend
>> VG-8050. I have tested other routers and the problem was not present
>> there.
>>
>> After some research it seems that the problem is caused by this
>> commit: http://git.pengutronix.de/?p=barebox.git;a=commit;h=da89ee8f2e04e116410632a185024f58b8262d87
>>
>> Before this commit eth0 was working fine. After this commit, the link
>> cannot established anymore:
>>
>> [...]
>> barebox:/# ping 192.168.0.128
>> ping failed: Network is down
>>
>> Before diving further into this I thought it could be a good idea to
>> ask, in case someone can shed some light here.
>
> I have no idea what the issue is here. We might have to make this option
> configurable via devicetree to give boards different options. Since the
> patch comes from the Linux Kernel, do you have the same problems under
> Linux?

I'm trying to get the latest kernel to boot. The latest version
supported by Atmel is 4.1, which doesn't have the patch yet. Will
report back asap.

-- 
Guillermo Rodriguez Garcia
guille.rodriguez at gmail.com