This uses an I2C bus to talk to the ChromeOS EC. The protocol
is defined by the EC and is fairly simple, with a length byte,
checksum, command byte and version byte (to permit easy creation
of new commands).
Signed-off-by: NSimon Glass <sjg@chromium.org>
Signed-off-by: NChe-Liang Chiou <clchiou@chromium.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>