Add a new source policy to provide 3A if there is only one port used
as a source.
Also ensure that the load switch on VBUS when sourcing power is properly
configured to limit the current to 1.5A or 3.0A depending on the case.
BRANCH=none
BUG=b:35585396
BUG=b:35577509
TEST=On soraka (rev1), connect any USB device on port 0. On port 1
attach C-C cable to MacBook Pro. MacBook Pro charges at ~1.5A.
Disconnect USB device on port 0, MacBook Pro charges at 3A.
TEST=On soraka (rev1), connect USB key on port 0, see it enumerating,
plug another USB key on port 1, it enumerates too, and the device
on port 0 does NOT disconnect/re-enumerate.
TEST=Repeat 2 tests above, but starting with port 1.
Change-Id: I48e744c8edec89bc0a53b54c47f666ad53e47551
Reviewed-on: https://chromium-review.googlesource.com/481563
Commit-Ready: Nicolas Boichat <drinkcat@chromium.org>
Tested-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
1c929523a2