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Based on kernel version 3.13. Page generated on 2014-01-20 21:59 EST.

1	What:		/sys/class/devfreq/.../
2	Date:		September 2011
3	Contact:	MyungJoo Ham <myungjoo.ham@samsung.com>
4	Description:
5			Provide a place in sysfs for the devfreq objects.
6			This allows accessing various devfreq specific variables.
7			The name of devfreq object denoted as ... is same as the
8			name of device using devfreq.
9	
10	What:		/sys/class/devfreq/.../governor
11	Date:		September 2011
12	Contact:	MyungJoo Ham <myungjoo.ham@samsung.com>
13	Description:
14			The /sys/class/devfreq/.../governor show or set the name of the
15			governor used by the corresponding devfreq object.
16	
17	What:		/sys/class/devfreq/.../cur_freq
18	Date:		September 2011
19	Contact:	MyungJoo Ham <myungjoo.ham@samsung.com>
20	Description:
21			The /sys/class/devfreq/.../cur_freq shows the current
22			frequency of the corresponding devfreq object. Same as
23			target_freq when get_cur_freq() is not implemented by
24			devfreq driver.
25	
26	What:		/sys/class/devfreq/.../target_freq
27	Date:		September 2012
28	Contact:	Rajagopal Venkat <rajagopal.venkat@linaro.org>
29	Description:
30			The /sys/class/devfreq/.../target_freq shows the next governor
31			predicted target frequency of the corresponding devfreq object.
32	
33	What:		/sys/class/devfreq/.../polling_interval
34	Date:		September 2011
35	Contact:	MyungJoo Ham <myungjoo.ham@samsung.com>
36	Description:
37			The /sys/class/devfreq/.../polling_interval shows and sets
38			the requested polling interval of the corresponding devfreq
39			object. The values are represented in ms. If the value is
40			less than 1 jiffy, it is considered to be 0, which means
41			no polling. This value is meaningless if the governor is
42			not polling; thus. If the governor is not using
43			devfreq-provided central polling
44			(/sys/class/devfreq/.../central_polling is 0), this value
45			may be useless.
46	
47	What:		/sys/class/devfreq/.../trans_stat
48	Date:		October 2012
49	Contact:	MyungJoo Ham <myungjoo.ham@samsung.com>
50	Descrtiption:
51			This ABI shows the statistics of devfreq behavior on a
52			specific device. It shows the time spent in each state and
53			the number of transitions between states.
54			In order to activate this ABI, the devfreq target device
55			driver should provide the list of available frequencies
56			with its profile.
57	
58	What:		/sys/class/devfreq/.../userspace/set_freq
59	Date:		September 2011
60	Contact:	MyungJoo Ham <myungjoo.ham@samsung.com>
61	Description:
62			The /sys/class/devfreq/.../userspace/set_freq shows and
63			sets the requested frequency for the devfreq object if
64			userspace governor is in effect.
65	
66	What:		/sys/class/devfreq/.../available_frequencies
67	Date:		October 2012
68	Contact:	Nishanth Menon <nm@ti.com>
69	Description:
70			The /sys/class/devfreq/.../available_frequencies shows
71			the available frequencies of the corresponding devfreq object.
72			This is a snapshot of available frequencies and not limited
73			by the min/max frequency restrictions.
74	
75	What:		/sys/class/devfreq/.../available_governors
76	Date:		October 2012
77	Contact:	Nishanth Menon <nm@ti.com>
78	Description:
79			The /sys/class/devfreq/.../available_governors shows
80			currently available governors in the system.
81	
82	What:		/sys/class/devfreq/.../min_freq
83	Date:		January 2013
84	Contact:	MyungJoo Ham <myungjoo.ham@samsung.com>
85	Description:
86			The /sys/class/devfreq/.../min_freq shows and stores
87			the minimum frequency requested by users. It is 0 if
88			the user does not care. min_freq overrides the
89			frequency requested by governors.
90	
91	What:		/sys/class/devfreq/.../max_freq
92	Date:		January 2013
93	Contact:	MyungJoo Ham <myungjoo.ham@samsung.com>
94	Description:
95			The /sys/class/devfreq/.../max_freq shows and stores
96			the maximum frequency requested by users. It is 0 if
97			the user does not care. max_freq overrides the
98			frequency requested by governors and min_freq.
99			The max_freq overrides min_freq because max_freq may be
100			used to throttle devices to avoid overheating.
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