31 строка
852 B
ReStructuredText
31 строка
852 B
ReStructuredText
|
.. SPDX-License-Identifier: GPL-2.0
|
||
|
|
|
||
|
|
========================
|
||
|
|
Device Frequency Scaling
|
||
|
|
========================
|
||
|
|
|
||
|
|
Introduction
|
||
|
|
------------
|
||
|
|
|
||
|
|
This framework provides a standard kernel interface for Dynamic Voltage and
|
||
|
|
Frequency Switching on arbitrary devices.
|
||
|
|
|
||
|
|
It exposes controls for adjusting frequency through sysfs files which are
|
||
|
|
similar to the cpufreq subsystem.
|
||
|
|
|
||
|
|
Devices for which current usage can be measured can have their frequency
|
||
|
|
automatically adjusted by governors.
|
||
|
|
|
||
|
|
API
|
||
|
|
---
|
||
|
|
|
||
|
|
Device drivers need to initialize a :c:type:`devfreq_profile` and call the
|
||
|
|
:c:func:`devfreq_add_device` function to create a :c:type:`devfreq` instance.
|
||
|
|
|
||
|
|
.. kernel-doc:: include/linux/devfreq.h
|
||
|
|
.. kernel-doc:: include/linux/devfreq-event.h
|
||
|
|
.. kernel-doc:: drivers/devfreq/devfreq.c
|
||
|
|
:export:
|
||
|
|
.. kernel-doc:: drivers/devfreq/devfreq-event.c
|
||
|
|
:export:
|