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Subject[PATCH] Allow use of the powersave governor as the default one
Date
Allow use of the powersave cpufreq governor as the default one for
EMBEDDED configs.

Signed-off-by: Alessandro Guido <alessandro.guido@gmail.com>
---
drivers/cpufreq/Kconfig | 9 +++++++++
drivers/cpufreq/cpufreq_powersave.c | 8 ++++++--
include/linux/cpufreq.h | 3 +++
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 ddd8652..dc31a40 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -307,6 +307,9 @@ 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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