Wifi / off-state leakage
werner at openmoko.org
Wed Aug 20 22:15:17 CEST 2008
Joerg Reisenweber wrote:
> HUH? Please give a pointer or quote! :-(
Phew. Instead of spending the rest of the day searching through our
archives for those old problems, let me just briefly describe what
- GTA01: while powering down (PMU.NoPower), the GPIOs would "jerk",
causing MODEM_RST to be asserted, which would in turn reset the
modem and leave it powered on.
- HXD8: we had a GPIO (input !) to sense the power button without
having to go through the PMU. Again, when powering down (*)
(PMU.NoPower), this GPIO would pull down and thus make the PMU
"think" the power button has been pressed.
(*) Not entirely sure if it was when powering up or down.
> BTW: even if this was true, it has no impact on actual GTA02-schematics,
Sorry, that wasn't clear. There will be no new trouble GPIOs in
> OK, there are people who feel uncomfortable with a battery in *any*
> cellphone nearby, when they have some confidential talk ;-)
Well, it's also things like getting stuck in resume. While I admire
Andy's efforts in trying to patch up all these race conditions that
result from what's basically a mismatched architecture, I think he
must sometimes feel like the lone cat dropped on the planet of the
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