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[<bogus@does.not.exist.com>]

so the user should only be allowed to change the value to anything else than
what is stored in the eeprom if we know it's a valid setting.

As far as I understand the EEPROM only stores a single value for the
antenna-switch setting, i.e. if there multiple valid values these must come from
somewhere else.

I don't know the exact electronic details of the implementation, so I'd go with
a list of known-to-be-good values (passed to the driver via platform-data)
instead of a causal check (e.g. don't allow to set the TX and RX to the same
antenna or whatever you imagine to possibly be an invalid setting).


Cheers

Daniel