broadwell: Clear USB3.0 PORTSC status bits in sleep_prepare.

Found that any non-USB3.0 devices connected to type-C ports
(displayPort dongles) cause XHCI port to see connection which in turn
leads us to enter USB compliance mode.

That in turn causes the port to wake the system for a yet-to-be
determined reason.  Clearing the PORTSC status bits (actually just
CSC) seems to remedy the wake.

Signed-off-by: Todd Broch <tbroch@chromium.org>

BRANCH=samus
BUG=chrome-os-partner:35320
TEST=manual,

1. Plug hoho into type-C port on samus and remove
2. powerd_dbus_suspend

Device stays asleep.

Change-Id: Id3a291579ffca0152a7ef32e37ecae80ca08a82b
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 0be5cba4916681dceb0372e76d9643e6c7175db5
Original-Change-Id: I1396b9f8013dbbb31286c1d8958af592b3da7475
Original-Reviewed-on: https://chromium-review.googlesource.com/247410
Original-Commit-Queue: Todd Broch <tbroch@chromium.org>
Original-Tested-by: Todd Broch <tbroch@chromium.org>
Original-Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/9814
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

0 files changed, 0 insertions, 0 deletions