Randall Spangler 6c55126080 cr50: Clean up device state code ...

This mostly adds a bunch of comments, but does make a few changes to
the code:

1) The devices console command now prints both the current device
state and the last known state.

2) servo_state_unknown() also checks if we're bit-banging the EC UART,
since that could also cause EC_DETECT to go high.

BUG=none
BRANCH=cr50
TEST=make buildall; use 'devices' command

Change-Id: I73e7524545ef49494eb36155b99f4042c1fd466d
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/602695
Reviewed-by: Mary Ruthven <mruthven@chromium.org>

2017-08-08 17:34:09 -07:00

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