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5dd75de0fb
When system timer stops while in heavysleep idle task,
hibernation timer maintains system time and system timer's
recovery is done with reading from hibernation timer.
If hibernation timer setting/reading is incorrect, system timer
recovery is incorrect and evenytually this will result in
quicker/more frequent task scheduling and eventually faster
sleep LED blinking at S3 and higher S3 power consumption.
BRANCH=firmware-strago-7287.B
BUG=chrome-os-partner:37576
TEST=1. measure S3 LED blinking time(probing GPIO pin with scope
2. For debug purpose, let system timer keeps running and compare
internval from system timer reading (t1 - t0) and one from
hibernation timer.
Change-Id: Iace3d29c9e20c0ea863c25eacb69d50858e204b7
Signed-off-by: Kyoung Kim <kyoung.il.kim@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/297753
Reviewed-by: Shawn N <shawnn@chromium.org>
(cherry picked from commit 86e7e64e3b5d27a80e1fac296776c0e2fb57912d)
Reviewed-on: https://chromium-review.googlesource.com/297796
Commit-Ready: Divya Jyothi <divya.jyothi@intel.com>
Tested-by: Divya Jyothi <divya.jyothi@intel.com>