tcpc/mt6370: Fix state debouncing when enable auto-toggling w/o battery.

mt6370 updates CC pin information to different registers according to
whether it is DRP toggling or not.

When DRP toggling: CC information will update to CC_STATUS 0x1D
When DRP not toggling: CC information will update to ROLE_CTRL 0x1D

However, there is a situation that when we are enabling
CONFIG_USB_PD_DUAL_ROLE_AUTO_TOGGLE: When we detach the battery,
and plug type-c port to boot EC, the type-c port is already connected,
before auto-toggling is on. mt6370 here updates CC information to
ROLE_CTRL 0x1D, rather than CC_STATUS. So here, we should determine where
to retrieve the CC information dynamically.

BRANCH=None
BUG=b:112113303
TEST=w/ battery: check state transition behaves correctly when sourcing
     and sinking.
TEST=w/o battery: check state transition behaves correctly when sinking.

Change-Id: Icf9e39f68aedb43a8fceba5d31795126a433d547
Signed-off-by: Yilun Lin <yllin@google.com>
Reviewed-on: https://chromium-review.googlesource.com/1177465
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Yilun Lin <yllin@chromium.org>
Reviewed-by: Jett Rink <jettrink@chromium.org>

0 files changed, 0 insertions, 0 deletions