Randall Spangler 241cc62685 samus: add options for device passthru and interface ...

This allows sending host commands to the PD chip through the EC.

The --interface option allows forcing a particular host interface.
This is necessary at present because the crosec device driver doesn't
support host protocol v3 so only has 8-bit command numbers.

BUG=chrome-os-partner:30079
BRANCH=none
TEST=from EC console,
   ectool version -> prints EC version
   ectool --interface=lpc --dev=0 version -> prints EC version
   ectool --interface=lpc --dev=1 version -> prints PD version
   ectool --interface=lpc --dev=2 version -> prints error
   ectool --interface=i2c version -> can't find EC
   ectool --interface=dev version -> prints EC version

Change-Id: I9dd10578dac77e3e104d19e2f37759814eec6ca2
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/207948

2014-07-16 07:16:47 +00:00

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