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As per the new spec, use the fast OCP to protect against the short-circuits by putting the threshold at 4.5A. Set the slow OCP (a few dozen milliseconds latency) at 3.6A to limit the accepted current range. Also sample the current/voltage over a larger period (5us) to limit noise issues. Signed-off-by: Vincent Palatin <vpalatin@chromium.org> BRANCH=none BUG=chrome-os-partner:28331 TEST=plug Zinger on an electronic load and trigger the OCP with various pulses. Change-Id: Ia66cd186716aebf88646cbf5fd340388f8cdd48d Reviewed-on: https://chromium-review.googlesource.com/204590 Tested-by: Vincent Palatin <vpalatin@chromium.org> Reviewed-by: Todd Broch <tbroch@chromium.org> Reviewed-by: Alec Berg <alecaberg@chromium.org> Commit-Queue: Vincent Palatin <vpalatin@chromium.org>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit