05f15314f0
First of all, no_central_polling was removed since
commit 7e6fdd4bad ("PM / devfreq: Core updates to support devices
which can idle")
Secondly, get_target_freq() is not only called only with update_devfreq()
notified by OPP now, but also min/max freq qos notifier.
So remove this invalid description now to avoid confusing.
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
4.6 KiB
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/.../name Date: November 2019 Contact: Chanwoo Choi cw00.choi@samsung.com Description: The /sys/class/devfreq/.../name shows the name of device of the corresponding devfreq object.
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/.../trans_stat Date: October 2012 Contact: MyungJoo Ham myungjoo.ham@samsung.com Description: This ABI shows or clears 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. If need to reset the statistics of devfreq behavior on a specific device, enter 0(zero) to 'trans_stat' as following::
echo 0 > /sys/class/devfreq/.../trans_stat
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.
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.
A list of governors that support the node:
- simple_ondmenad
- tegra_actmon
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.
A list of governors that support the node:
- userspace
What: /sys/class/devfreq/.../timer Date: July 2020 Contact: Chanwoo Choi cw00.choi@samsung.com Description: This ABI shows and stores the kind of work timer by users. This work timer is used by devfreq workqueue in order to monitor the device status such as utilization. The user can change the work timer on runtime according to their demand as following::
echo deferrable > /sys/class/devfreq/.../timer
echo delayed > /sys/class/devfreq/.../timer
A list of governors that support the node:
- simple_ondemand