Both the deprecated /proc/sys/cpu/ interface, and the new policy-based
/proc/cpufreq interface can work nicely in the same kernel.
Dominik
--- /usr/src/linux/kernel/cpufreq.c Wed Oct 9 00:50:41 2002
+++ linux/kernel/cpufreq.c Tue Oct 8 16:54:23 2002
@@ -4,7 +4,7 @@
* Copyright (C) 2001 Russell King
* (C) 2002 Dominik Brodowski <linux@brodo.de>
*
- * $Id: cpufreq.c,v 1.43 2002/09/21 09:05:29 db Exp $
+ * $Id: cpufreq.c,v 1.45 2002/10/08 14:54:23 db Exp $
*
* 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
@@ -21,13 +21,10 @@
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/ctype.h>
+#include <linux/proc_fs.h>
#include <asm/uaccess.h>
-#ifdef CONFIG_CPU_FREQ_26_API
-#include <linux/proc_fs.h>
-#endif
-
#ifdef CONFIG_CPU_FREQ_24_API
#include <linux/sysctl.h>
#endif
@@ -200,7 +197,6 @@
__setup("cpufreq=", cpufreq_setup);
-#ifdef CONFIG_CPU_FREQ_26_API
#ifdef CONFIG_PROC_FS
/**
@@ -335,7 +331,6 @@
return;
}
#endif /* CONFIG_PROC_FS */
-#endif /* CONFIG_CPU_FREQ_26_API */
@@ -344,10 +339,6 @@
*********************************************************************/
#ifdef CONFIG_CPU_FREQ_24_API
-/* NOTE #1: when you use this API, you may not use any other calls,
- * except cpufreq_[un]register_notifier, of course.
- */
-
/**
* cpufreq_set - set the CPU frequency
* @freq: target frequency in kHz
@@ -879,7 +870,7 @@
cpufreq_driver->policy[policy->cpu].max = policy->max;
cpufreq_driver->policy[policy->cpu].policy = policy->policy;
}
-
+
#ifdef CONFIG_CPU_FREQ_24_API
if (policy->cpu == CPUFREQ_ALL_CPUS) {
for (i=0;i<NR_CPUS;i++)
@@ -945,6 +936,13 @@
case CPUFREQ_POSTCHANGE:
adjust_jiffies(CPUFREQ_POSTCHANGE, freqs);
notifier_call_chain(&cpufreq_transition_notifier_list, CPUFREQ_POSTCHANGE, freqs);
+#ifdef CONFIG_CPU_FREQ_24_API
+ if (freqs->cpu == CPUFREQ_ALL_CPUS) {
+ for (i=0;i<NR_CPUS;i++)
+ cpu_cur_freq[i] = freqs->new;
+ } else
+ cpu_cur_freq[freqs->cpu] = freqs->new;
+#endif
break;
}
up(&cpufreq_notifier_sem);
@@ -992,9 +990,7 @@
ret = cpufreq_set_policy(&default_policy);
-#ifdef CONFIG_CPU_FREQ_26_API
cpufreq_proc_init();
-#endif
#ifdef CONFIG_CPU_FREQ_24_API
down(&cpufreq_driver_sem);
@@ -1042,9 +1038,7 @@
up(&cpufreq_driver_sem);
-#ifdef CONFIG_CPU_FREQ_26_API
cpufreq_proc_exit();
-#endif
#ifdef CONFIG_CPU_FREQ_24_API
cpufreq_sysctl_exit();
@@ -1086,13 +1080,7 @@
policy.cpu = i;
up(&cpufreq_driver_sem);
-#ifdef CONFIG_CPU_FREQ_26_API
cpufreq_set_policy(&policy);
-#endif
-
-#ifdef CONFIG_CPU_FREQ_24_API
- cpufreq_set(cpu_cur_freq[i], i);
-#endif
}
return 0;
--- /usr/src/linux/include/linux/cpufreq.h Wed Oct 9 00:50:41 2002
+++ linux/include/linux/cpufreq.h Tue Oct 8 16:54:23 2002
@@ -5,7 +5,7 @@
* (C) 2002 Dominik Brodowski <linux@brodo.de>
*
*
- * $Id: cpufreq.h,v 1.26 2002/09/21 09:05:29 db Exp $
+ * $Id: cpufreq.h,v 1.27 2002/10/08 14:54:23 db Exp $
*
* 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
@@ -148,11 +148,9 @@
int cpufreq_set_policy(struct cpufreq_policy *policy);
int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu);
-#ifdef CONFIG_CPU_FREQ_26_API
#ifdef CONFIG_PM
int cpufreq_restore(void);
#endif
-#endif
#ifdef CONFIG_CPU_FREQ_24_API
@@ -160,9 +158,6 @@
* CPUFREQ 2.4. INTERFACE *
*********************************************************************/
int cpufreq_setmax(unsigned int cpu);
-#ifdef CONFIG_PM
-int cpufreq_restore(void);
-#endif
int cpufreq_set(unsigned int kHz, unsigned int cpu);
unsigned int cpufreq_get(unsigned int cpu);
--- linux/arch/i386/Config.help.original Tue Oct 8 16:09:36 2002
+++ linux/arch/i386/Config.help Tue Oct 8 16:12:02 2002
@@ -852,12 +852,10 @@
CONFIG_CPU_FREQ_24_API
This enables the /proc/sys/cpu/ sysctl interface for controlling
- CPUFreq, as known from the 2.4.-kernel patches for CPUFreq. Note
- that some drivers do not support this interface or offer less
- functionality.
-
- If you say N here, you'll be able to control CPUFreq using the
- new /proc/cpufreq interface.
+ CPUFreq, as known from the 2.4.-kernel patches for CPUFreq. 2.5
+ uses /proc/cpufreq instead. Please note that some drivers do not
+ work with the 2.4. /proc/sys/cpu sysctl interface, so if in doubt,
+ say N here.
For details, take a look at linux/Documentation/cpufreq.
--- linux/arch/i386/config.in.original Tue Oct 8 16:09:43 2002
+++ linux/arch/i386/config.in Tue Oct 8 16:12:49 2002
@@ -192,10 +192,7 @@
bool 'CPU Frequency scaling' CONFIG_CPU_FREQ
if [ "$CONFIG_CPU_FREQ" = "y" ]; then
- bool ' /proc/sys/cpu/ interface (2.4.)' CONFIG_CPU_FREQ_24_API
- if [ "$CONFIG_CPU_FREQ_24_API" = "n" ]; then
- define_bool CONFIG_CPU_FREQ_26_API y
- fi
+ bool ' /proc/sys/cpu/ interface (2.4. / OLD)' CONFIG_CPU_FREQ_24_API
tristate ' AMD Mobile K6-2/K6-3 PowerNow!' CONFIG_X86_POWERNOW_K6
if [ "$CONFIG_MELAN" = "y" ]; then
tristate ' AMD Elan' CONFIG_ELAN_CPUFREQ
-
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