tree 2e2e6d35a8cac57376d82b3b3a89c8676cb49c68
parent 2e5c609b2c7a14cff4f51c749ae9d5835b79ff52
author Harry Pan <harry.pan@intel.com> 1498541627 +0800
committer chrome-bot <chrome-bot@chromium.org> 1498902389 -0700

power_status: refine S0ix residency accounting of APL

The SOC_S0IX_TOTAL_RES field of /sys/kernel/debug/telemetry/ioss_info
is not reliable when it comes to real-time counting of S0ix residency.

To tackle this, utilize the new kernel API in telemetry driver to poll
S0ix residency directly through PMC Global Control Registers (GCR).

Also, based on new debugfs node, we can get rid of platform parsers.
Even the node paths might be different from platform to platform,
while the format is unified as microseconds.

BUG=b:62824436
TEST=run the test of
'test_that --autotest_dir ~/trunk/src/third_party/autotest/files/
--board=$BOARD $DUT_IP f:.*power_SuspendStress/control.bareFSI',
get rid of the errors of 'S0ix residency did not change'.
CQ-DEPEND=CL:544731

Change-Id: Ie33c5dceaf50154201cac351f9b1c75a3f4ea6e8
Signed-off-by: Harry Pan <harry.pan@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/549240
Reviewed-by: Dan Erat <derat@chromium.org>
Reviewed-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@intel.corp-partner.google.com>