Nicolas Boichat e5c6f97d1a charge_state_v2: Basic dual-battery charging algorithm ...

First version of the algorithm, some TODOs are left in the code
but this, generally, works reasonably well.

When charging, we allocate input current in this general order:
 - Base system (fixed, low, number)
 - Lid system (based on PSYS)
 - Lid battery (estimating how much current the battery actually
   requires)
 - Base battery (similar estimation)
 - Provide everything else to lid

When discharging, we generally:
 - First discharge the base battery
 - Then discharge the lid battery

BRANCH=none
BUG=b:71881017
TEST=Flash lux and wand, EC-EC communication works, adapter power
     is split in a sensible way, and discharging works fine.

Change-Id: I8a4f87963962fc5466b2fedf1347eb4dadd35740
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/659460
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Reviewed-by: Randall Spangler <rspangler@chromium.org>

2018-01-26 13:25:38 -08:00

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