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Input to the EC UART console is restricted by default so that casual passers-by can't type random commands to it through the case-closed debug connection. However, there's no need to restrict the AP UART console, since it's entirely under the AP's control. This CL leaves the AP console enabled by default whenever the CCD cable is connected. It will be disabled when the AP is powered down or while servo is attached, but enabled otherwise. BUG=chrome-os-partner:55322 BRANCH=none TEST=make buildall, test on Cr50 hardware Use the "ccd" command to see and modify the UART console settings, and the "devices" command to observe how things change when servo is connected and things are powered up and down. Change-Id: I5cc453bc60473269e22112cf49f61495733abb10 Signed-off-by: Bill Richardson <wfrichar@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/382152 Commit-Ready: Bill Richardson <wfrichar@google.com> Tested-by: Bill Richardson <wfrichar@google.com> Reviewed-by: Mary Ruthven <mruthven@chromium.org>