[Gta04-owner] wakeup on incoming call can work (was: GTA04A4 PCBs for "From Stock" units have arrived)

[Dr. H. Nikolaus Schaller]

Am 07.12.2011 um 10:23 schrieb Stefan Wildemann:

>>   Unknown/untested: FM radio/transmitter, camera, torch/flash, ambient light sensor, RFID-EEPROM, USB-OTG, Wakeup from incoming call
>> Mostly because we don't have drivers or did not yet find time to fix the kernel configs in the hw-validation kernel.
> 

And again good news (to update the non-existing list
and to tell others about the progress):

it is possible to trigger a CPU interrupt (GPIO176 on
GTA04A3 boards and GPIO10 on GTA04A4) on
incoming calls or SMS. This interrupt may also wake
up the CPU from power down if supported by the kernel.

So it appears possible to suspend the device into lowest
power mode (some 3-10 mA according to the data sheet)
and trigger on incoming calls. That is what we need to
achieve a long standby time.

Estimation what we can expect:
10 mA @ 1200 mAh = 120 hours
3 mA @ 1200 mAh = 400 hours

Nikolaus