[Gta04-owner] What is GPIO175 "HOST_WAKE_WWAN" for?

[NeilBrown]

Hi,
 Looking at the schematic there are two GPIO pins connected to the GSM module.

176 "3G_WOE" is apparently for the GSM module to use to wake the CPU when
something is happening,
but what is 176 "HOST_WAKE_WWAN" for?  Is it out from the CPU and IN to the
GSM, or the other way?
Any hints?

And still curious - what is the change made to the later board to make it
possible to power-down the GSM module?

Thanks,
NeilBrown
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