On Fri, 31 Jan 2020 15:15:00 +0000, Russell King - ARM Linux admin
wrote:

I have some prototype implementation for driving the QSFP+ cage, but
I haven't yet worked out how to sensible deal with the "is it 4x 10G
or 1x 40G" issue you mention above, and how to interface the QSFP+
driver sensibly with one or four network drivers.

I'm pretty sure you know this but just FWIW - vendors who do it in FW
write the current config down in NVM so it doesn't get affected by
reboots and use devlink port splitting to change it.

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