This change creates a state machine to handle ap uart detection. It
removes all of the ap_uart stuff from ap_state.c and moves it to
ap_uart_state.c. All boards will now use ap_uart to enable/disable ap
uart and tpm_rst_l to detect the ap state.
Separate ap uart detection from ap detection, so we can disable the ap
uart without enabling deep sleep. If the ap is in S3 on ARM devices,
Cr50 wont be in deep sleep, but the AP UART RX signal wont be pulled up.
In this case we need cr50 ap rx to be disabled and deep sleep to be
disabled.
BUG=b:35647982
BRANCH=cr50
TEST=run firmware_Cr50DeviceState on scalet and electro
Change-Id: I81336a9e232df8d44b325eef59327a1c06a80cba
Signed-off-by: Mary Ruthven <mruthven@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/884307
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
(cherry picked from commit 4d3c8c1776)
Reviewed-on: https://chromium-review.googlesource.com/900557
Commit-Queue: Vadim Bendebury <vbendeb@chromium.org>
Tested-by: Vadim Bendebury <vbendeb@chromium.org>
d798dd3181