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