Philip Chen bf62593ebd
charge_state_v2: Throttle AP in high battery discharge current ...
When EC sees discharge current hit BAT_MAX_DISCHG_CURRENT,
we kick off a timer and ask AP to throttle.
Then EC keeps monitoring discharge current. If the current doesn't
drop below BAT_MAX_DISCHG_CURRENT - BAT_OCP_HYSTERESIS, we restart
the timer and notify AP again, which shouldn't happen unless
AP misses or ignores the first notification.
When the timer expires, which means EC hasn't seen over-current
for BAT_OCP_TIMEOUT_US, we ask AP to stop throttling.
BUG=b:74321682, chromium:838754
BRANCH=scarlet
TEST=manually test on scarlet, confirm EC sends
EC_HOST_EVENT_THROTTLE_START and EC_HOST_EVENT_THROTTLE_STOP
host events when entering/exiting OCP.
Change-Id: I1e55fc23249596d8afec52a3885655ca9c1f2151
Signed-off-by: Philip Chen <philipchen@google.com >
Reviewed-on: https://chromium-review.googlesource.com/994188
Commit-Ready: Philip Chen <philipchen@chromium.org >
Tested-by: Philip Chen <philipchen@chromium.org >
Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org >
Reviewed-by: Matthias Kaehlcke <mka@chromium.org >
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bf62593ebd