]> git.openfabrics.org - ~shefty/rdma-dev.git/blob - Documentation/ABI/testing/sysfs-class-devfreq
Merge branch 'acpi-general'
[~shefty/rdma-dev.git] / Documentation / ABI / testing / sysfs-class-devfreq
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 shows 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.
23
24 What:           /sys/class/devfreq/.../central_polling
25 Date:           September 2011
26 Contact:        MyungJoo Ham <myungjoo.ham@samsung.com>
27 Description:
28                 The /sys/class/devfreq/.../central_polling shows whether
29                 the devfreq ojbect is using devfreq-provided central
30                 polling mechanism or not.
31
32 What:           /sys/class/devfreq/.../polling_interval
33 Date:           September 2011
34 Contact:        MyungJoo Ham <myungjoo.ham@samsung.com>
35 Description:
36                 The /sys/class/devfreq/.../polling_interval shows and sets
37                 the requested polling interval of the corresponding devfreq
38                 object. The values are represented in ms. If the value is
39                 less than 1 jiffy, it is considered to be 0, which means
40                 no polling. This value is meaningless if the governor is
41                 not polling; thus. If the governor is not using
42                 devfreq-provided central polling
43                 (/sys/class/devfreq/.../central_polling is 0), this value
44                 may be useless.
45
46 What:           /sys/class/devfreq/.../userspace/set_freq
47 Date:           September 2011
48 Contact:        MyungJoo Ham <myungjoo.ham@samsung.com>
49 Description:
50                 The /sys/class/devfreq/.../userspace/set_freq shows and
51                 sets the requested frequency for the devfreq object if
52                 userspace governor is in effect.