[SHR-Unstable] Forcing fast-charge

Joerg Reisenweber 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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