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2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/Documentation/ABI/testing/sysfs-class-devfreq
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@@ -54,13 +54,17 @@
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 What:		/sys/class/devfreq/.../trans_stat
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 Date:		October 2012
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 Contact:	MyungJoo Ham <myungjoo.ham@samsung.com>
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-Descrtiption:
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-		This ABI shows the statistics of devfreq behavior on a
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-		specific device. It shows the time spent in each state and
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-		the number of transitions between states.
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+Description:
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+		This ABI shows or clears the statistics of devfreq behavior
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+		on a specific device. It shows the time spent in each state
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+		and the number of transitions between states.
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 		In order to activate this ABI, the devfreq target device
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 		driver should provide the list of available frequencies
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-		with its profile.
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+		with its profile. If need to reset the statistics of devfreq
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+		behavior on a specific device, enter 0(zero) to 'trans_stat'
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+		as following::
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+
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+			echo 0 > /sys/class/devfreq/.../trans_stat
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 What:		/sys/class/devfreq/.../userspace/set_freq
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 Date:		September 2011
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@@ -105,3 +109,16 @@
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 		frequency requested by governors and min_freq.
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 		The max_freq overrides min_freq because max_freq may be
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 		used to throttle devices to avoid overheating.
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+
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+What:		/sys/class/devfreq/.../timer
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+Date:		July 2020
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+Contact:	Chanwoo Choi <cw00.choi@samsung.com>
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+Description:
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+		This ABI shows and stores the kind of work timer by users.
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+		This work timer is used by devfreq workqueue in order to
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+		monitor the device status such as utilization. The user
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+		can change the work timer on runtime according to their demand
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+		as following::
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+
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+			echo deferrable > /sys/class/devfreq/.../timer
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+			echo delayed > /sys/class/devfreq/.../timer