Add support for two new configs to specify critical energy battery
percentage and critical external charger power. When we are under both
thresholds, set the LIMIT_POWER charger parameter to inform the AP that it
should conserve power to avoid brownout, and consider jumping to EC RW
to negotiate PD.
In addition, modify the existing CONFIG_CHARGER_MIN_BAT_PCT_FOR_POWER_ON
to allow power-up regardless of power level if a 15W+ charger is
attached, since there is a reasonable chance it may speak PD and provide
sufficient power to boot the AP.
BUG=chromium:537269
TEST=Manual on Glados. Set CHG_MW thresh to 20000, BAT_PCT to 50. Verify
that LIMIT_POWER charger param is set until Zinger negotiates to 20V. Also
veify that system can boot with Donette.
BRANCH=None
Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Change-Id: Ic963c82fea4ad10e8a5d7e476c5ce3e5ae525dad
Reviewed-on: https://chromium-review.googlesource.com/306774
Commit-Ready: Shawn N <shawnn@chromium.org>
Tested-by: Shawn N <shawnn@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Reviewed-by: Alec Berg <alecaberg@chromium.org>
2bd7dce32e