[Bug 685] New: Detect a dedicated USB charger according to the USB battery charging specification

[bugzilla-daemon at bugzilla.openmoko.org]

http://bugzilla.openmoko.org/cgi-bin/bugzilla/show_bug.cgi?id=685

           Summary: Detect a dedicated USB charger according to the USB
                    battery charging specification
           Product: Neo1973 Hardware
           Version: unspecified
          Platform: Neo1973
               URL: http://www.usb.org/developers/devclass_docs#approved
        OS/Version: Linux
            Status: NEW
          Severity: wishlist
          Priority: P2
         Component: PMU (Power Management Unit)
        AssignedTo: sean_chiang at fic.com.tw
        ReportedBy: cesarb at cesarb.net
                CC: buglog at lists.openmoko.org


The recent Battery Charging Specification defines a way of detecting a dedicated
USB charger, without needing any special circuit on the charger itself (the
charger needs only to connect D+ to D-). According to
http://wiki.openezx.org/EMU, the Motorola chargers short D+ to D-, meaning that
if this specification is implemented, these chargers would work with the Neo.

This would need hardware changes; even with the kernel already running, it does
not seem possible to use the method described on the specification with the
current hardware.



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