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