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If our battery params seem uninitialized when calling charge_prevent_power_on, try to retrieve them and make a decision based upon the retrieved data. This should prevent the case where power-up is incorrectly prevented early in the boot process. BUG=chrome-os-partner:35762 TEST=Manual on Samus. Write protect unit and run "reboot" from the console, verify that unit powers up. Verify that unit still correctly prevents low-power power-on and correctly allows non-low-power power-on. BRANCH=Samus Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org> Change-Id: I9030a2d5e526f4b03996a89bf2c801533683bb67 Reviewed-on: https://chromium-review.googlesource.com/242560 Reviewed-by: Alec Berg <alecaberg@chromium.org> Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit