[PATCH v2] mx6cuboxi: Fix Ethernet after DT sync with Linux

[Christian Gmeiner]

Hi Fabio

> From: Josua Mayer <josua at solid-run.com>
> 
> The i.MX6 Cubox-i and HummingBoards can have different PHYs at varying
> addresses. U-Boot needs to auto-detect which phy is actually present,
> and at which address it is responding.
> 
> Auto-detection from multiple phy nodes specified in device-tree does not
> currently work correct. As a work-around merge all three possible phys
> into one node with the special address 0xffffffff which indicates to the
> generic phy driver to probe all addresses.
> 
> Signed-off-by: Josua Mayer <josua at solid-run.com>
> [fabio: Added the changes to imx6qdl-sr-som-u-boot.dtsi.]
> Signed-off-by: Fabio Estevam <festevam at gmail.com>
> Tested-by: Christian Gmeiner <cgmeiner at igalia.com>
> ---
> Changes since v1:
> - Disable ethernet-phy at addresses 0, 1 and 4.
> - Remove the fixup of the fake 0xffffff address before booting Linux.
> 
> Josua and Christian,
> 
> I got access to a imx6 humming board and I was able to test it.
> 
> This is the minimal fix I came up based on your suggestions.
> 
> There is no need to fixup of the fake 0xffffff address before booting Linux,
> as this fake address does not exist in Linux.
> 
> Successfully tested Ethernet in U-Boot and in the kernel.
> 
> Given that Ethernet is currently broken, I suggest we go with this
> version to restore Ethernet for 2024.04.
> 
> What do you think?
> 

I am happy with the patch and love the idea to fix Ethernet for 2024.04.

Tested-by: Christian Gmeiner <cgmeiner at igalia.com>

Thanks & Regards,
Christian