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In order to satisfy factory testing requirements we need to boot a bare board with just an AC adapter without requiring a power button. However we also don't want to always allow booting of the battery is present but cut-off (which will indicate BP_NO so we can't use the existing battery_is_present function) or has critically low level as it may not immediately boot. To accomplish this add a function that allows the board to specify a custom "hardware presence" for the battery that is separate from the battery presence check. This CL is taking a change done for Eve and pulling into TOT so it can be used for other projects that have the same requirements. https://chromium-review.googlesource.com/c/582544 BUG=b:63957122 BRANCH=none TEST=manual Change-Id: Ib1dc4f659adbf0eebd3dc8c3c61b39b8fa36cb4a Signed-off-by: Scott Collyer <scollyer@google.com> Reviewed-on: https://chromium-review.googlesource.com/627113 Commit-Ready: Scott Collyer <scollyer@chromium.org> Tested-by: Scott Collyer <scollyer@chromium.org> Reviewed-by: Aaron Durbin <adurbin@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