[SHR-Unstable] Forcing fast-charge
joerg at openmoko.org
Sun Apr 19 07:45:46 CEST 2009
Am So 19. April 2009 schrieb Cameron Frazier:
> On Sat, 2009-04-18 at 17:11 -0700, Mike Montour wrote:
> > Cameron Frazier wrote:
> > > Ahh, ok. Now things seem to be working correctly. One question though
> > > what are the differences between usb_curlim and chg_curlim? I'm not
> > > sure I fully understand what chg_curlim represents.
> > chg_curlim controls the battery charger, while usb_curlim controls the
> > total current that can be drawn from the USB port (charging + the
> > current used by the Freerunner). The PCF50633 datasheet (linked from
> > somewhere on the wiki) has more information.
> Wonderful. Thanks for the info.
basically you never want to care about chg_curlim as it is a maximum of 1C =
1.2A for GTA01/02 battery cell and you never can draw that much current from
USB (The PMU allows for a maximum of 1A here). PMU is automatically handling
the distribution of available USB current between charging and system in a
way system always has priority and chrg current reduced accordingly - so no
need to care about chg_curlim for that topic either.
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