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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.