[PATCH 1/1] uboot-pcf50633-default-curr-lim-1A.patch

Harald Welte laforge at openmoko.org
Fri Feb 22 02:28:33 CET 2008

On Thu, Feb 21, 2008 at 10:01:26PM +0200, Marko Mäkelä wrote:

> I would like to echo what I wrote a month ago at
> <http://bugzilla.openmoko.org/cgi-bin/bugzilla/show_bug.cgi?id=956>
> and point out that the USB Battery Charging specification
> <http://www.usb.org/developers/devclass_docs/batt_charging_1_0.zip>
> allows devices to draw up to 1.5 amperes from a special charger.

I'm well aware of the spec, but it came way too late to affect
gta01/gta02 development.  It puts actually quite complex charger
detection onto the device, and I think it's unlikely that it will see
much adoption until the SoC or OTG chipset vendors include all the
required analog and digital logic into their integrated circuits.

The charger side is easy to implement.  But of what use is it for the
charger to be compliant, if the phone cannot handle a compliant charger

- Harald Welte <laforge at openmoko.org>          	        http://openmoko.org/
Software for the world's first truly open Free Software mobile phone

More information about the openmoko-kernel mailing list