QtMoko v58 with 2.6.39 kernel and improved power management
joerg at openmoko.org
Thu Dec 19 08:47:16 CET 2013
On Thu 19 December 2013 08:21:54 Radek Polak wrote:
> the update interval is now as often as uevents are comming from linux
> kernel. You can enable logging->power management and check in log how
> often it is - i think it could be those 20s.
> > Is there a way of increasing the frequency, and making it work "in the
> > background" while the phone is in suspend?
> AFAIK the battery charge is updated even when phone is suspended - the chip
> in battery does this.
> Maybe we could force QtMoko to read it immediately after leaving suspend.
> The values should be fresh. I can check if it's easily doable.
Yes, the chip does "gapfree" battery monitoring in GTA02-battery. Since FIQ
needed to read out the (bq27x00 chip in) battery is kinda heavy, it makes
sense to not update it too often. Also battery doesn't change that fast to
make sense when updating more frequently, actually I think 20s is pretty
However an update cycle scheduled immediately after resume should be easily
feasible and is the "right thing[TM]" to do :-)
Maybe an even smarter way to handle all related issues would be to trigger a
battery chip readout and update the battery gauge display whenever the display
becomes "visible" - X11 should be able to send an according signal, I think.
This would as well support up-to-date displayed values after closing a
fullscreen app and after unblanking the screen.
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