30d221db44
Allow use of the powersave cpufreq governor as the default one for EMBEDDED configs. Signed-off-by: Alessandro Guido <alessandro.guido@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dave Jones <davej@redhat.com>
66 lines
1.6 KiB
C
66 lines
1.6 KiB
C
/*
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* linux/drivers/cpufreq/cpufreq_powersave.c
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*
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* Copyright (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/cpufreq.h>
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#include <linux/init.h>
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#define dprintk(msg...) \
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cpufreq_debug_printk(CPUFREQ_DEBUG_GOVERNOR, "powersave", msg)
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static int cpufreq_governor_powersave(struct cpufreq_policy *policy,
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unsigned int event)
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{
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switch (event) {
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case CPUFREQ_GOV_START:
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case CPUFREQ_GOV_LIMITS:
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dprintk("setting to %u kHz because of event %u\n",
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policy->min, event);
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__cpufreq_driver_target(policy, policy->min,
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CPUFREQ_RELATION_L);
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break;
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default:
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break;
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}
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return 0;
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}
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struct cpufreq_governor cpufreq_gov_powersave = {
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.name = "powersave",
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.governor = cpufreq_governor_powersave,
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.owner = THIS_MODULE,
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};
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EXPORT_SYMBOL(cpufreq_gov_powersave);
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static int __init cpufreq_gov_powersave_init(void)
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{
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return cpufreq_register_governor(&cpufreq_gov_powersave);
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}
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static void __exit cpufreq_gov_powersave_exit(void)
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{
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cpufreq_unregister_governor(&cpufreq_gov_powersave);
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}
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MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
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MODULE_DESCRIPTION("CPUfreq policy governor 'powersave'");
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MODULE_LICENSE("GPL");
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#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE
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fs_initcall(cpufreq_gov_powersave_init);
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#else
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module_init(cpufreq_gov_powersave_init);
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#endif
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module_exit(cpufreq_gov_powersave_exit);
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