Pileus Git - ~andy/linux/blob - 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. 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/.../userspace/set_freq
  48 Date:           September 2011
  49 Contact:        MyungJoo Ham <myungjoo.ham@samsung.com>
  50 Description:
  51                 The /sys/class/devfreq/.../userspace/set_freq shows and
  52                 sets the requested frequency for the devfreq object if
  53                 userspace governor is in effect.