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62055e53b6
PI3USB9281 may not assert the interrupt line if device is detached and reading the interrupt register simultaneously. And it is not necessary to check the interrupt status when vbus change event happens. To prevent losing the detach interrupt during vbus change event happens, only check the interrupt status only if receiving the USB_CHG_EVENT_INTR event. BUG=chrome-os-partner:48797 BRANCH=none TEST=Plug/Unplug PD charger 20 times, UI should not display "Low power charger" warning message each time during the PD charger is unplugged. Change-Id: I51fe68732ece882029f1503294c2122cfbb00c34 Signed-off-by: Ben Lok <ben.lok@mediatek.com> Reviewed-on: https://chromium-review.googlesource.com/328897 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