netdev - Re: Question: Ethernet Phy issues on Colibri IMX8X (imx8qxp)

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Date:   Wed, 10 Aug 2022 08:05:45 +0000
From:   Marcel Ziswiler <marcel.ziswiler@...adex.com>
To:     "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "embed3d@...il.com" <embed3d@...il.com>,
        "qiangqing.zhang@....com" <qiangqing.zhang@....com>
CC:     "philipp.rossak@...mulastudent.de" <philipp.rossak@...mulastudent.de>,
        "guoniu.zhou@....com" <guoniu.zhou@....com>,
        "aisheng.dong@....com" <aisheng.dong@....com>,
        "abel.vesa@....com" <abel.vesa@....com>,
        "andrew@...n.ch" <andrew@...n.ch>
Subject: Re: Question: Ethernet Phy issues on Colibri IMX8X (imx8qxp) - kernel
 5.19

Sali Philipp

On Wed, 2022-08-10 at 00:55 +0200, Philipp Rossak wrote:
> Hi,
> 
> I currently have a project with a Toradex Colibri IMX8X SOM board whith 
> an onboard Micrel KSZ8041NL Ethernet PHY.
> 
> The hardware is described in the devictree properly so I expected that 
> the onboard Ethernet with the phy is working.
> 
> Currently I'm not able to get the link up.
> 
> I already compared it to the BSP kernel, but I didn't found anything 
> helpful. The BSP kernel is working.
> 
> Do you know if there is something in the kernel missing and got it running?

Yes, you may just revert the following commit babfaa9556d7 ("clk: imx: scu: add more scu clocks")

Alternatively, just commenting out the following single line also helps:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/clk/imx/clk-imx8qxp.c?h=v5.19#n172

I just found this out about two weeks ago before I went to vacation and since have to find out with NXP what
exactly the idea of this clocking/SCFW stuff is related to our hardware.

@NXP: If any of you guys could shed some light that would be much appreciated. Thanks!

> Thanks,
> Philipp

Cheers

Marcel