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GPIO_USB_C0_VBUS_WAKE_L is used to show VBUS status on elm. If VBUS is present, pd sends soft reset on boot. So it can boot without battery. BUG=chrome-os-partner:53496 BRANCH=none TEST=test on elm. Remove battery and boot up successfully only with AC. Use "sysjump rw" command and ec won't reboot by pd hard reset. Change-Id: I1cdb12894c7b6bc41d7a16802b8c0ef14e2aa426 Signed-off-by: YH Huang <yh.huang@mediatek.com> Reviewed-on: https://chromium-review.googlesource.com/346261 Tested-by: Koro Chen <koro.chen@mediatek.com> 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
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