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Add HW charge ramping option and enable on glados. Modify charge_manager to enable/disable HW charge ramping when option is defined. Unfortunately, the isl9237 doesn't have a way to determine what the input current limit has settled on, so the EC will always report the max input current for that supplier. BUG=chrome-os-partner:47335 BRANCH=none TEST=plug in CDP, SDP, DCP, type-C, and PD charger. Make sure we ramp to a reasonable value for the correct suppliers. Make sure we don't ramp for type-C and PD chargers. Change-Id: Ib541fa0be48d8f4d261c71b853b0ee72b2adbf6b Signed-off-by: Alec Berg <alecaberg@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/311301 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