Ticket #685 (closed defect: later)

Opened 6 years ago

Last modified 6 years ago

Detect a dedicated USB charger according to the USB battery charging specification

Reported by: cesarb@… Owned by: sean_chiang@…
Priority: high Milestone:
Component: PMU (Power Management Unit) Version: unspecified
Severity: wishlist Keywords:
Cc: buglog@…, cw@… Blocked By:
Blocking: Estimated Completion (week):
HasPatchForReview: PatchReviewResult:
Reproducible:

Description

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.

Change History

comment:1 Changed 6 years ago by cw@…

  • Cc cw@… added

comment:2 Changed 6 years ago by laforge@…

  • Status changed from new to closed
  • Resolution set to later

unfortunately this is not an option for either GTA01 nor GTA02. The new battery
charging specification is so horribly complex. We might revisit this for some
later (non-neo1973) devices.

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