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

[Boudewijn]

On Wednesday 14 December 2011 23:06:13 Christoph Mair wrote:
> Hi,
> 
> I'm just guessing right now:
> 
> On Wed, Dec 14, 2011 at 10:02 PM, NeilBrown <neilb at suse.de> wrote:
> > 176 "3G_WOE" is apparently for the GSM module to use to wake the CPU when
> > something is happening,
> 
> Yes.
> 
> > 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?
> 
> Mhh, maybe getting the Module out of suspend. If its suspended we can
> power down the USB Bus.
> 
> > And still curious - what is the change made to the later board to make it
> > possible to power-down the GSM module?
> 
> Connected ON_KEY to a GPIO.

Was it, in future revisions, also not connected to pin 104 instead of 176, 
because 176 can not be powered down when GSM is off and 104 can, saving a few 
more mA? 

Boudewijn

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