1What:		/sys/class/devfreq/.../
  2Date:		September 2011
  3Contact:	MyungJoo Ham <myungjoo.ham@samsung.com>
  4Description:
  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
 10What:		/sys/class/devfreq/.../governor
 11Date:		September 2011
 12Contact:	MyungJoo Ham <myungjoo.ham@samsung.com>
 13Description:
 14		The /sys/class/devfreq/.../governor show or set the name of the
 15		governor used by the corresponding devfreq object.
 16
 17What:		/sys/class/devfreq/.../cur_freq
 18Date:		September 2011
 19Contact:	MyungJoo Ham <myungjoo.ham@samsung.com>
 20Description:
 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
 26What:		/sys/class/devfreq/.../target_freq
 27Date:		September 2012
 28Contact:	Rajagopal Venkat <rajagopal.venkat@linaro.org>
 29Description:
 30		The /sys/class/devfreq/.../target_freq shows the next governor
 31		predicted target frequency of the corresponding devfreq object.
 32
 33What:		/sys/class/devfreq/.../polling_interval
 34Date:		September 2011
 35Contact:	MyungJoo Ham <myungjoo.ham@samsung.com>
 36Description:
 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
 47What:		/sys/class/devfreq/.../trans_stat
 48Date:		October 2012
 49Contact:	MyungJoo Ham <myungjoo.ham@samsung.com>
 50Descrtiption:
 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
 58What:		/sys/class/devfreq/.../userspace/set_freq
 59Date:		September 2011
 60Contact:	MyungJoo Ham <myungjoo.ham@samsung.com>
 61Description:
 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
 66What:		/sys/class/devfreq/.../available_frequencies
 67Date:		October 2012
 68Contact:	Nishanth Menon <nm@ti.com>
 69Description:
 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
 75What:		/sys/class/devfreq/.../available_governors
 76Date:		October 2012
 77Contact:	Nishanth Menon <nm@ti.com>
 78Description:
 79		The /sys/class/devfreq/.../available_governors shows
 80		currently available governors in the system.
 81
 82What:		/sys/class/devfreq/.../min_freq
 83Date:		January 2013
 84Contact:	MyungJoo Ham <myungjoo.ham@samsung.com>
 85Description:
 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
 91What:		/sys/class/devfreq/.../max_freq
 92Date:		January 2013
 93Contact:	MyungJoo Ham <myungjoo.ham@samsung.com>
 94Description:
 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.