On 01.09.2014 22:19, Charles Devereaux wrote:
Hello
I'm interested in WWAN support, mostly for the GPS features and the cool things you can do with them (like a stratum ntp server).
Most GPS receivers don't have enough precision for any timing.
I was told a EM770W doesn't even need a network registration to output NMEA coordinates (http://forum.thinkpads.com/viewtopic.php?f=30&t=114426#p735612) so I got one.
I looked at patch #4056 which enable WWAN for the EC, but it seems to only part of the job: the ACPI table should also contain a GWAN key for thinkpad-acpi
Not necessary.
Apparently, this last part cause the WWAN card not to be handled by thinkpad-acpi, which would otherwise provide rfkill support (usefull to save power, something I'd like to improve)
Soft rfkill is always available through wwan driver.
I believe similar entries should be added to coreboot asl, but I'm not sure of how integrated they should be. If I understand correctly, following the logic of patch #5242, there should be a conditional statement then some acpigen.
5242 is very special because of wacom tablet interaction (serial device naming) See src/ec/lenovo/h8/acpi/ec.asl and included files for the relevant scopes