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ARM systems currently use SBS kernel driver which talks to the battery through I2C passthu in the EC. Instead when asking for battery information try getting it from the charge state machine first, and then try the battery if charge state does not have the information. This reduces latency by cutting out the battery response time. BUG=chromium:484841 BRANCH=none TEST=check that power_supply_info works properly on Jerry Change-Id: If4da15ccabe412adc31fc94b189089ebb3e9265c Signed-off-by: Mary Ruthven <mruthven@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/307905 Reviewed-by: Randall Spangler <rspangler@chromium.org> Reviewed-by: Alec Berg <alecaberg@chromium.org>