Record what current limit we set when we act as a source
and when we are changing it.
The change should be backward-compatible as older EC will return 0 in
`current_max` when their role is PD_ROLE_SOURCE while newer firmware
will set the actual limit.
BRANCH=none
BUG=chrome-os-partner:56110
TEST=manual: on Kevin, plug and unplug various devices on the 2
ports, and dump the values with 'ectool usbpdpower'.
Change-Id: I8e78663f3196b1b81c2235ed8642da0638bed649
Reviewed-on: https://chromium-review.googlesource.com/375918
Commit-Ready: Vincent Palatin <vpalatin@chromium.org>
Tested-by: Vincent Palatin <vpalatin@chromium.org>
Reviewed-by: Shawn N <shawnn@chromium.org>
ebc973ce39