tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * linux/drivers/cpufreq/cpufreq_powersave.c
3 *
4 * Copyright (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
5 *
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 */
12
13#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
14
15#include <linux/cpufreq.h>
16#include <linux/init.h>
17#include <linux/module.h>
18
19static int cpufreq_governor_powersave(struct cpufreq_policy *policy,
20 unsigned int event)
21{
22 switch (event) {
23 case CPUFREQ_GOV_START:
24 case CPUFREQ_GOV_LIMITS:
25 pr_debug("setting to %u kHz because of event %u\n",
26 policy->min, event);
27 __cpufreq_driver_target(policy, policy->min,
28 CPUFREQ_RELATION_L);
29 break;
30 default:
31 break;
32 }
33 return 0;
34}
35
36static struct cpufreq_governor cpufreq_gov_powersave = {
37 .name = "powersave",
38 .governor = cpufreq_governor_powersave,
39 .owner = THIS_MODULE,
40};
41
42static int __init cpufreq_gov_powersave_init(void)
43{
44 return cpufreq_register_governor(&cpufreq_gov_powersave);
45}
46
47static void __exit cpufreq_gov_powersave_exit(void)
48{
49 cpufreq_unregister_governor(&cpufreq_gov_powersave);
50}
51
52MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
53MODULE_DESCRIPTION("CPUfreq policy governor 'powersave'");
54MODULE_LICENSE("GPL");
55
56#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE
57struct cpufreq_governor *cpufreq_default_governor(void)
58{
59 return &cpufreq_gov_powersave;
60}
61
62fs_initcall(cpufreq_gov_powersave_init);
63#else
64module_init(cpufreq_gov_powersave_init);
65#endif
66module_exit(cpufreq_gov_powersave_exit);