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When the charge ramp task starts, it starts up in the DISCONNECTED state. From this state, it's possible to set the input current limit to 0 mA. However, upon task start, we shouldn't take any action until we have valid values from a new charge supplier or a supplier leaving. This commit changes the charge ramp task to not touch the input current limit until the charge ramp state changes or the desired input current changes at least once. BUG=b:36468002 BRANCH=gru,master TEST=Flash kevin EC RW or build AP FW that contains the fix that will by sync'd by EC SW sync. Make sure WP is asserted to prevent PD communications in RO. Unplug battery. Plug in AC, verify that system can boot up to UI on AC alone. TEST=make -j buildall Change-Id: I351917bce7902c49d1bb842a0cc83dd161d75b6f Reviewed-on: https://chromium-review.googlesource.com/461382 Commit-Queue: Aseda Aboagye <aaboagye@chromium.org> Tested-by: Aseda Aboagye <aaboagye@chromium.org> Reviewed-by: Randall Spangler <rspangler@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/463927 Commit-Ready: Aseda Aboagye <aaboagye@chromium.org> Reviewed-by: Aseda Aboagye <aaboagye@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