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4d3c8c1776
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>