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On the bd9995*, back boosting may occur when actual battery voltage drops below VBAT register setting. Maintain the VBAT register at the battery-requested charge voltage even when not charging to ensure the bd9995* doesn't become a back boosted animal. BUG=chrome-os-partner:56139,chrome-os-partner:54248 BRANCH=gru TEST=Manual on kevin, unplug AC, run 'charger', verify that 'V_batt' is maintained at 8688 mV. Attach charger, verify 'V_batt' stays at 8688 mV and device charges. Change-Id: Ia0cc7f9279cb460e20a8faf332ad432067dc5482 Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/400087 Commit-Ready: Daisuke Nojiri <dnojiri@chromium.org> Tested-by: Shawn N <shawnn@chromium.org> Reviewed-by: Vijay P Hiremath <vijay.p.hiremath@intel.com> Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit For instructions on building from source, refer to http://www.chromium.org/chromium-os/ec-development/getting-started-building-ec-images-quickly