Alec Berg 909c3236de zinger: fix down voltage transitions to keep output enabled
Fix bug in which output was disabled on down voltage transitions.
This also changes the behavior of the OVP protection. On down-step
transitions, the OVP threshold is not lowered for a specified amount
of time after the transition to allow the output to dissipate down to
the new voltage. This will still catch a problem if the voltage goes
up instead of down, but avoid OVPing immediately on a normal down
transition.

BUG=chrome-os-partner:30389
BRANCH=none
TEST=Attach to firefly and probe output voltage. Make sure we
transition smoothly going down in voltage.

Change-Id: I7f3a0c17cc8b392a25d24d56d2b7155b806acb64
Signed-off-by: Alec Berg <alecaberg@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/209863
2014-07-29 04:36:15 +00:00
2014-07-29 02:21:22 +00:00
2014-07-10 21:17:58 +00:00
2014-06-05 23:14:34 +00:00
2014-07-28 21:53:13 +00:00
2014-03-31 22:45:09 +00:00
2012-05-11 09:11:52 -07:00
2014-06-18 06:08:45 +00:00
2014-04-02 19:58:53 +00:00
2014-05-15 05:20:14 +00:00

For an overview of the Embedded Controller firmware, refer to

http://www.chromium.org/chromium-os/2014-firmware-summit
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