Both the /proc/sys/cpu/ and /proc/cpufreq interface can safely be
enabled in the same kernel. This simplifies the transition to the newer
interface. Only minor updates are needed in order to allow this to be
done.
Dominik
diff -ruN linux-2545original/arch/i386/Kconfig linux/arch/i386/Kconfig
--- linux-2545original/arch/i386/Kconfig Thu Oct 31 12:00:00 2002
+++ linux/arch/i386/Kconfig Thu Oct 31 21:30:00 2002
@@ -471,26 +471,19 @@
If in doubt, say N.
config CPU_FREQ_24_API
- bool "/proc/sys/cpu/ interface (2.4.)"
+ bool "/proc/sys/cpu/ interface (2.4. / OLD)"
depends on CPU_FREQ
- ---help---
+ help
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 well 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.
If in doubt, say N.
-config CPU_FREQ_26_API
- bool
- depends on CPU_FREQ && !CPU_FREQ_24_API
- default y
-
config X86_POWERNOW_K6
tristate "AMD Mobile K6-2/K6-3 PowerNow!"
depends on CPU_FREQ
@@ -554,7 +547,7 @@
config X86_LONGRUN
tristate "Transmeta LongRun"
- depends on CPU_FREQ && !CPU_FREQ_24_API
+ depends on CPU_FREQ
help
This adds the CPUFreq driver for Transmeta Crusoe processors which
support LongRun.
diff -ruN linux-2545original/include/linux/cpufreq.h linux/include/linux/cpufreq.h
--- linux-2545original/include/linux/cpufreq.h Thu Oct 31 12:00:00 2002
+++ linux/include/linux/cpufreq.h Thu Oct 31 21:30:00 2002
@@ -5,7 +5,7 @@
* (C) 2002 Dominik Brodowski <[email protected]>
*
*
- * $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);
diff -ruN linux-2545original/kernel/cpufreq.c linux/kernel/cpufreq.c
--- linux-2545original/kernel/cpufreq.c Thu Oct 31 12:00:00 2002
+++ linux/kernel/cpufreq.c Thu Oct 31 21:30:00 2002
@@ -4,7 +4,7 @@
* Copyright (C) 2001 Russell King
* (C) 2002 Dominik Brodowski <[email protected]>
*
- * $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 +936,14 @@
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) {
+ int i;
+ 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 +991,7 @@
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 +1039,7 @@
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 +1081,7 @@
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;
diff -ruN linux-2545original/arch/i386/kernel/cpu/cpufreq/longrun.c linux/arch/i386/kernel/cpu/cpufreq/longrun.c
--- linux-2545original/arch/i386/kernel/cpu/cpufreq/longrun.c Thu Oct 31 12:00:00 2002
+++ linux/arch/i386/kernel/cpu/cpufreq/longrun.c Thu Oct 31 21:30:00 2002
@@ -251,6 +251,11 @@
longrun_get_policy(&driver->policy[0]);
+#ifdef CONFIG_CPU_FREQ_24_API
+ driver->cpu_min_freq = longrun_low_freq;
+ driver->cpu_cur_freq[0] = longrun_high_freq; /* dummy value */
+#endif
+
driver->verify = &longrun_verify_policy;
driver->setpolicy = &longrun_set_policy;
result = cpufreq_register(driver);