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TTC must be written twice, otherwise the value will be lost on EC reset, even if VBAT stays stable. BUG=chrome-os-partner:57010 BRANCH=None TEST=On kevin, run 'rtc set 55555' then trigger cold reset through servo. Run 'rtc' on subsequent boot and verify timing ticks did not reset to zero. Change-Id: If05b698e75eece5f8879a109b98886b547eb71a4 Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/382654 Commit-Ready: Shawn N <shawnn@chromium.org> Tested-by: Shawn N <shawnn@chromium.org> Reviewed-by: Aseda Aboagye <aaboagye@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