Crap...now to figure out if this is doable (by me) for Debian Wheezy. ...if computers become sentient, it's probably because I goofed something up.
On Thursday, December 5, 2013 12:10:18 PM UTC-5, Lei Wang wrote: > > I can confirm that the pulsing detected by PMIC on USB_DC signal is the > probing from USB-OTG. > > After I disabled the USB-OTG in the kernel, the system has never rebooted. > Btw I also re-loaded Angstrom image (3.8 kernel) and Andrew's Android image > (with 3.8 kernel). I did not observe USB-OTG probing pulses on the VBus. I > believe in the 3.8 kernel, the USB-OTG has not been implemented/enabled. > That might be reason why it seems that 3.8 kernel doesn't have the random > reboot behavior. > > > > On Wednesday, December 4, 2013 6:15:13 PM UTC-5, dek...@gmail.com wrote: >> >> >> On Wednesday, December 4, 2013 1:45:02 PM UTC-5, lisarden wrote: >>> >>> The abstract from the TPS65217 datasheet to describe what is going on >>> here: >>> >>> The linear charger periodically applies a 10-mA current source to the >>> BAT pin to check for the presence of a >>> >>> battery. This will cause the BAT terminal to float up to > 3 V which may >>> interfere with AC removal detection and >>> >>> the ability to switch from AC to USB input. For this reason, it is not >>> recommended to use both AC and USB >>> >>> inputs when the battery is absent. >>> >> I wonder when the BAT terminal drifts > 3 V, if the PMIC behaves as >> if V_BAT > V_UVLO. >> >> If so, I wonder what happens if AM335x USB-OTG probing drives VBUS > >> V_BAT + 190 mV. That would exceed V_IN(DT). >> >> > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
