Thread: N900 will not allow USB OTG!
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joerg_rw is offline joerg_rw
2010-05-01 , 01:00
Posts: 2,222 | Thanked: 12,651 times | Joined on Mar 2010 @ SOL 3
#693
Last point first, more later (after a short offtime )
Originally Posted by egoshin View Post
why VBUS is going to GAIA? I suspect it may be a way to start battery charging with dead operating system...
Battery charging without system assistance is done by the CRG_DET->OTG link from 1707 PHY chip to bq24150 bat charger.
The GAIA connection is to initiate system boot when VBUS is detected and high enough voltage, and also will probably signal the already booted system about VBUS being applied (plug in detection, /sys/bus/i2c/devices/1-0048/twl4030_usb/vbus)

More tomorrow
/j
Last edited by joerg_rw; 2010-05-01 at 03:27.
 

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