linux-kernel - Re: PROBLEM: Broken or delayed ethernet on Xilinx ZCU104 since 5.18 (regression)

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Message-ID: <CADyTPExypWjMW2PF0EfSFc+vvdzRtNEi_H0p3S-mw1BNWyq6VQ@mail.gmail.com>
Date:   Sat, 5 Aug 2023 03:10:18 -0400
From:   Nick Bowler <nbowler@...conx.ca>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Rob Herring <robh@...nel.org>,
        Saravana Kannan <saravanak@...gle.com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        netdev@...r.kernel.org, regressions@...ts.linux.dev
Subject: Re: PROBLEM: Broken or delayed ethernet on Xilinx ZCU104 since 5.18 (regression)

Hi,

On 2023-08-05, Andrew Lunn <andrew@...n.ch> wrote:
>> When I revert that commit, I can locate the phy device under all these
>> locations.
>
> Please do what Russell requested, but also try commenting out the PHY
> reset-gpios line in DT which was added by
> c720a1f5e6ee8cb39c28435efc0819cec84d6ee2.

Removing the reset-gpios line from the dts appears to be sufficient to
restore working behaviour.

> It was also commented out before that change. It could be that gpio
> controller is missing. Do you have the driver for the tca6416 in
> your kernel configuration?

I have CONFIG_GPIO_PCA953X=y which I think is the correct driver?

Thanks,
  Nick