After receiving more info from the manufacturer, it appears that
since we're using closed-loop feedback to drive the fan we can
turn it at whatever speed seems to work.
While we're bikeshedding over the startup noise, let's put the
start/min speed back to 1000RPM to help distinguish the startup
chirp from the fan-is-running-now noise.
BUG=chrome-os-partner:32757
BRANCH=ToT,Samus
TEST=make buildall -j
Watch fan speeds while doing things. It still makes noise, but it's
quieter.
Change-Id: I5c21bf9021e4110f31c6dded78852347c4eb6119
Signed-off-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/234755
Reviewed-by: Sameer Nanda <snanda@chromium.org>
Reviewed-by: Eric Caruso <ejcaruso@chromium.org>
99ec74d7d4