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When inductive charging just starts, there might be a blip on CHARGE_DONE signal and it'd cause our charging control logic to shut down charging. Fix this by waiting for a second before we start monitoring CHARGE_DONE. Also, once we see CHARGE_DONE=1 and disable charging, CHARGE_DONE will go low. Handle this by ignoring all subsequent CHARGE_DONE change until the next time the lid is opened. BRANCH=Ryu BUG=None TEST=Pass the updated unit test. TEST=Charge a base on Ryu P3. Change-Id: I9d911cd689d8e88ebcd66e6eca7c86dd70704880 Signed-off-by: Vic Yang <victoryang@google.com> Reviewed-on: https://chromium-review.googlesource.com/243365 Tested-by: Vic Yang <victoryang@chromium.org> Reviewed-by: Randall Spangler <rspangler@chromium.org> Reviewed-by: Vincent Palatin <vpalatin@chromium.org> Commit-Queue: Vic Yang <victoryang@chromium.org>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit