Getting voltage and current can be handy when verifying hardware design.
Let's add host command to do this.
BUG=chrome-os-partner:17880
TEST=Manual on Spring
BRANCH=none
Change-Id: I4d4f6a42a9d0f917292d092e132ccd9ce3367fd6
Signed-off-by: Vic Yang <victoryang@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/43508
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>