PM: cpuidle/suspend: Add s2idle usage and time state attributes

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Add a new attribute group called "s2idle" under the sysfs directory
of each cpuidle state that supports the ->enter_s2idle callback
and put two new attributes, "usage" and "time", into that group to
represent the number of times the given state was requested for
suspend-to-idle and the total time spent in suspend-to-idle after
requesting that state, respectively.

That will allow diagnostic information related to suspend-to-idle
to be collected without enabling advanced debug features and
analyzing dmesg output.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

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Rafael J. Wysocki 2018-03-14 12:27:21 +01:00

parent 8919d779f1

commit 64bdff6980

4 changed files with 92 additions and 0 deletions

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include/linux/cpuidle.h

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