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Add a new source policy to provide 3A if there is only one port used as a source. Also ensure that the load switch on VBUS when sourcing power is properly configured to limit the current to 1.5A or 3.0A depending on the case. Signed-off-by: Vincent Palatin <vpalatin@chromium.org> BRANCH=none BUG=chrome-os-partner:56110 TEST=manual: connect the laptop to a type-C sink with Twinkie in between, without anything else connected on the laptop, see 3A flowing when measuring with Twinkie ('tw vbus'), plug a dangling C-to-A receptacle dongle on the other port and see 1.5A flowing through Twinkie. Force the input current limit on the sink to 3.0A and see the laptop cutting VBUS. Change-Id: Ic94ba186fc0648e770c8d13be0f96b23e968f855 Reviewed-on: https://chromium-review.googlesource.com/403851 Commit-Ready: Vincent Palatin <vpalatin@chromium.org> Tested-by: Vincent Palatin <vpalatin@chromium.org> Reviewed-by: Shawn N <shawnn@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