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The mux for selecting source clock of ITIM will introduce a delay and have a chance to make ITIM's source clock and core clock are asynchronous. We need consecutive reading for ITCNT32 no matter source clock is APB2 or 32k. Modified sources: 1. hwtimer.c: Add consecutive reading for ITCNT32 BRANCH=none BUG=chrome-os-partner:34346,chrome-os-partner:59240 TEST=No time stamp symptoms occur on wheatley for 30 hours. Change-Id: I8b54e93b320e3ea74fc3d6ea13f0d178f9c449cd Signed-off-by: Mulin Chao <mlchao@nuvoton.com> Reviewed-on: https://chromium-review.googlesource.com/412505 Reviewed-by: Randall Spangler <rspangler@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