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The Fizz hardware has three pins for CEC. One GPIO is used as a pull-up. It is always an output and always high. The second GPIO is a data output. The third GPIO is the data input that can also be configured as a timer input (TA1). Signed-off-by: Stefan Adolfsson <sadolfsson@chromium.org> BUG=b:76467407 BRANCH=none TEST=Read and write the newly added GPIOs using ectool Change-Id: Ia33b36a0cdaa40fd1a4f7aa66a092b5833bf5cf8 Reviewed-on: https://chromium-review.googlesource.com/1030219 Commit-Ready: Stefan Adolfsson <sadolfsson@chromium.org> Tested-by: Stefan Adolfsson <sadolfsson@chromium.org> Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit For instructions on building from source, refer to http://www.chromium.org/chromium-os/ec-development/getting-started-building-ec-images-quickly