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From:   Nick Bowler <nbowler@draconx.ca>
Date:   Sat, 5 Aug 2023 03:34:22 -0400
Message-ID: <CADyTPEyQcHd5-A2TLf_-U5KdtA5WKZ_mNYKvx3DSMjkNi99E0g@mail.gmail.com>
Subject: Re: PROBLEM: Broken or delayed ethernet on Xilinx ZCU104 since 5.18 (regression)
To:     Andrew Lunn <andrew@lunn.ch>
Cc:     Rob Herring <robh@kernel.org>,
        Saravana Kannan <saravanak@google.com>,
        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        netdev@vger.kernel.org, regressions@lists.linux.dev
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On 2023-08-05, Andrew Lunn <andrew@lunn.ch> wrote:
>> > 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?
>
> It does appear to be the correct driver. But check if it has
> loaded. It is an i2c device, so maybe you are missing the I2C bus
> master device?

That's it!  I needed to set

  CONFIG_I2C_CADENCE=y

and now things are working again!

Thanks,
  Nick