forked from luck/tmp_suning_uos_patched
2d06d8c49a
With dynamic debug having gained the capability to report debug messages also during the boot process, it offers a far superior interface for debug messages than the custom cpufreq infrastructure. As a first step, remove the old cpufreq_debug_printk() function and replace it with a call to the generic pr_debug() function. How can dynamic debug be used on cpufreq? You need a kernel which has CONFIG_DYNAMIC_DEBUG enabled. To enabled debugging during runtime, mount debugfs and $ echo -n 'module cpufreq +p' > /sys/kernel/debug/dynamic_debug/control for debugging the complete "cpufreq" module. To achieve the same goal during boot, append ddebug_query="module cpufreq +p" as a boot parameter to the kernel of your choice. For more detailled instructions, please see Documentation/dynamic-debug-howto.txt Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Dave Jones <davej@redhat.com>
66 lines
1.5 KiB
C
66 lines
1.5 KiB
C
/*
|
|
* linux/drivers/cpufreq/cpufreq_powersave.c
|
|
*
|
|
* Copyright (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
|
|
*
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/cpufreq.h>
|
|
#include <linux/init.h>
|
|
|
|
static int cpufreq_governor_powersave(struct cpufreq_policy *policy,
|
|
unsigned int event)
|
|
{
|
|
switch (event) {
|
|
case CPUFREQ_GOV_START:
|
|
case CPUFREQ_GOV_LIMITS:
|
|
pr_debug("setting to %u kHz because of event %u\n",
|
|
policy->min, event);
|
|
__cpufreq_driver_target(policy, policy->min,
|
|
CPUFREQ_RELATION_L);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#ifndef CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE
|
|
static
|
|
#endif
|
|
struct cpufreq_governor cpufreq_gov_powersave = {
|
|
.name = "powersave",
|
|
.governor = cpufreq_governor_powersave,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
static int __init cpufreq_gov_powersave_init(void)
|
|
{
|
|
return cpufreq_register_governor(&cpufreq_gov_powersave);
|
|
}
|
|
|
|
|
|
static void __exit cpufreq_gov_powersave_exit(void)
|
|
{
|
|
cpufreq_unregister_governor(&cpufreq_gov_powersave);
|
|
}
|
|
|
|
|
|
MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
|
|
MODULE_DESCRIPTION("CPUfreq policy governor 'powersave'");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE
|
|
fs_initcall(cpufreq_gov_powersave_init);
|
|
#else
|
|
module_init(cpufreq_gov_powersave_init);
|
|
#endif
|
|
module_exit(cpufreq_gov_powersave_exit);
|