59 lines
2.1 KiB
C
59 lines
2.1 KiB
C
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/***************************************************************************
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* __________ __ ___
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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*
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* Copyright (C) 2015 by Udo Schläpfer
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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*
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* Interface for the Linux CPUFreq kernel modul.
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* See https://www.kernel.org/doc/Documentation/cpu-freq/
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*
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****************************************************************************/
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#ifndef __CPUFREQ_LINUX_H__
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#define __CPUFREQ_LINUX_H__
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#include <stdbool.h>
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/*
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Get the available governors for cpu.
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governors Preallocated string for the available governors. On succes this will look like
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"performance ondemand powersave", each word beeing a governor that can be used with
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cpufreq_set_governor.
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governors_size Size of governors.
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cpu The cpu, starting with 0, for which to get the available governors. CPUFREQ_ALL_CPUS is not
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supported, you must supply a cpu. See cpucount_linux in cpuinfo-linux.h.
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*/
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void cpufreq_available_governors(char* governors, int governors_size, int cpu);
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/*
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Set the cpufreq governor for cpu.
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governor The governor to set. This must be one of the available governors returned by
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cpufreq_available_governors.
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cpu The cpu, starting with 0, for which to set the governor. CPUFREQ_ALL_CPUS to set
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the governor for all cpus. See cpucount_linux in cpuinfo-linux.h.
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*/
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void cpufreq_set_governor(const char* governor, int cpu);
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static const int CPUFREQ_ALL_CPUS = -1;
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#endif
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