| What: /sys/class/devfreq/.../ | |
| Date: September 2011 | |
| Contact: MyungJoo Ham <myungjoo.ham@samsung.com> | |
| Description: | |
| Provide a place in sysfs for the devfreq objects. | |
| This allows accessing various devfreq specific variables. | |
| The name of devfreq object denoted as ... is same as the | |
| name of device using devfreq. | |
| What: /sys/class/devfreq/.../governor | |
| Date: September 2011 | |
| Contact: MyungJoo Ham <myungjoo.ham@samsung.com> | |
| Description: | |
| The /sys/class/devfreq/.../governor show or set the name of the | |
| governor used by the corresponding devfreq object. | |
| What: /sys/class/devfreq/.../cur_freq | |
| Date: September 2011 | |
| Contact: MyungJoo Ham <myungjoo.ham@samsung.com> | |
| Description: | |
| The /sys/class/devfreq/.../cur_freq shows the current | |
| frequency of the corresponding devfreq object. Same as | |
| target_freq when get_cur_freq() is not implemented by | |
| devfreq driver. | |
| What: /sys/class/devfreq/.../target_freq | |
| Date: September 2012 | |
| Contact: Rajagopal Venkat <rajagopal.venkat@linaro.org> | |
| Description: | |
| The /sys/class/devfreq/.../target_freq shows the next governor | |
| predicted target frequency of the corresponding devfreq object. | |
| What: /sys/class/devfreq/.../polling_interval | |
| Date: September 2011 | |
| Contact: MyungJoo Ham <myungjoo.ham@samsung.com> | |
| Description: | |
| The /sys/class/devfreq/.../polling_interval shows and sets | |
| the requested polling interval of the corresponding devfreq | |
| object. The values are represented in ms. If the value is | |
| less than 1 jiffy, it is considered to be 0, which means | |
| no polling. This value is meaningless if the governor is | |
| not polling; thus. If the governor is not using | |
| devfreq-provided central polling | |
| (/sys/class/devfreq/.../central_polling is 0), this value | |
| may be useless. | |
| What: /sys/class/devfreq/.../trans_stat | |
| Date: October 2012 | |
| Contact: MyungJoo Ham <myungjoo.ham@samsung.com> | |
| Descrtiption: | |
| This ABI shows the statistics of devfreq behavior on a | |
| specific device. It shows the time spent in each state and | |
| the number of transitions between states. | |
| In order to activate this ABI, the devfreq target device | |
| driver should provide the list of available frequencies | |
| with its profile. | |
| What: /sys/class/devfreq/.../userspace/set_freq | |
| Date: September 2011 | |
| Contact: MyungJoo Ham <myungjoo.ham@samsung.com> | |
| Description: | |
| The /sys/class/devfreq/.../userspace/set_freq shows and | |
| sets the requested frequency for the devfreq object if | |
| userspace governor is in effect. | |
| What: /sys/class/devfreq/.../available_frequencies | |
| Date: October 2012 | |
| Contact: Nishanth Menon <nm@ti.com> | |
| Description: | |
| The /sys/class/devfreq/.../available_frequencies shows | |
| the available frequencies of the corresponding devfreq object. | |
| This is a snapshot of available frequencies and not limited | |
| by the min/max frequency restrictions. | |
| What: /sys/class/devfreq/.../available_governors | |
| Date: October 2012 | |
| Contact: Nishanth Menon <nm@ti.com> | |
| Description: | |
| The /sys/class/devfreq/.../available_governors shows | |
| currently available governors in the system. | |
| What: /sys/class/devfreq/.../min_freq | |
| Date: January 2013 | |
| Contact: MyungJoo Ham <myungjoo.ham@samsung.com> | |
| Description: | |
| The /sys/class/devfreq/.../min_freq shows and stores | |
| the minimum frequency requested by users. It is 0 if | |
| the user does not care. min_freq overrides the | |
| frequency requested by governors. | |
| What: /sys/class/devfreq/.../max_freq | |
| Date: January 2013 | |
| Contact: MyungJoo Ham <myungjoo.ham@samsung.com> | |
| Description: | |
| The /sys/class/devfreq/.../max_freq shows and stores | |
| the maximum frequency requested by users. It is 0 if | |
| the user does not care. max_freq overrides the | |
| frequency requested by governors and min_freq. | |
| The max_freq overrides min_freq because max_freq may be | |
| used to throttle devices to avoid overheating. |