When sensor is disabled, HAL will not send flush request to EC.
However, when sensor is reenabled, only new events are expected.
When we have a change in frequency, we have to request the host to
query all the current events.
Flush the FIFO when events are not needed because all sensors are
disabled.
BRANCH=smaug
TEST=Pass more tests: tests like ..._fastest_batching after _50hz_flush
have more change to pass.
BUG=chrome-os-partner:39900
Change-Id: I1a8fc3784e3e6be260b23103b28e336e242f14cd
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/291991
Reviewed-by: Sheng-liang Song <ssl@chromium.org>
5faadc6748