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authorAlessandro Guido <alessandro.guido@gmail.com>2008-04-18 13:31:13 -0700
committerDave Jones <davej@redhat.com>2008-04-28 16:27:08 -0400
commit30d221db4439973076953e2ed44344fa92d1d09f (patch)
tree15e97af8ffa193aede37f7bcb50fe9e905a41dcb
parent605400a8ab44131698b206cbe253e48380daaa69 (diff)
downloadop-kernel-dev-30d221db4439973076953e2ed44344fa92d1d09f.zip
op-kernel-dev-30d221db4439973076953e2ed44344fa92d1d09f.tar.gz
[CPUFREQ] allow use of the powersave governor as the default one
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>
-rw-r--r--drivers/cpufreq/Kconfig9
-rw-r--r--drivers/cpufreq/cpufreq_powersave.c8
-rw-r--r--include/linux/cpufreq.h3
3 files changed, 18 insertions, 2 deletions
diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig
index c159ae6..5f076ae 100644
--- a/drivers/cpufreq/Kconfig
+++ b/drivers/cpufreq/Kconfig
@@ -69,6 +69,15 @@ config CPU_FREQ_DEFAULT_GOV_PERFORMANCE
the frequency statically to the highest frequency supported by
the CPU.
+config CPU_FREQ_DEFAULT_GOV_POWERSAVE
+ bool "powersave"
+ depends on EMBEDDED
+ select CPU_FREQ_GOV_POWERSAVE
+ help
+ Use the CPUFreq governor 'powersave' as default. This sets
+ the frequency statically to the lowest frequency supported by
+ the CPU.
+
config CPU_FREQ_DEFAULT_GOV_USERSPACE
bool "userspace"
select CPU_FREQ_GOV_USERSPACE
diff --git a/drivers/cpufreq/cpufreq_powersave.c b/drivers/cpufreq/cpufreq_powersave.c
index 13fe06b..88d2f44 100644
--- a/drivers/cpufreq/cpufreq_powersave.c
+++ b/drivers/cpufreq/cpufreq_powersave.c
@@ -35,12 +35,12 @@ static int cpufreq_governor_powersave(struct cpufreq_policy *policy,
return 0;
}
-static struct cpufreq_governor cpufreq_gov_powersave = {
+struct cpufreq_governor cpufreq_gov_powersave = {
.name = "powersave",
.governor = cpufreq_governor_powersave,
.owner = THIS_MODULE,
};
-
+EXPORT_SYMBOL(cpufreq_gov_powersave);
static int __init cpufreq_gov_powersave_init(void)
{
@@ -58,5 +58,9 @@ 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);
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index a881fd6..e7e91db 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -308,6 +308,9 @@ extern struct cpufreq_governor cpufreq_gov_performance;
#endif
#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE
#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_performance)
+#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE)
+extern struct cpufreq_governor cpufreq_gov_powersave;
+#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_powersave)
#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE)
extern struct cpufreq_governor cpufreq_gov_userspace;
#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_userspace)
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