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path: root/drivers/devfreq/governor_powersave.c
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Diffstat (limited to 'drivers/devfreq/governor_powersave.c')
-rw-r--r--drivers/devfreq/governor_powersave.c38
1 files changed, 33 insertions, 5 deletions
diff --git a/drivers/devfreq/governor_powersave.c b/drivers/devfreq/governor_powersave.c
index fec0cdbd2477..0c6bed567e6d 100644
--- a/drivers/devfreq/governor_powersave.c
+++ b/drivers/devfreq/governor_powersave.c
@@ -10,6 +10,7 @@
*/
#include <linux/devfreq.h>
+#include <linux/module.h>
#include "governor.h"
static int devfreq_powersave_func(struct devfreq *df,
@@ -23,14 +24,41 @@ static int devfreq_powersave_func(struct devfreq *df,
return 0;
}
-static int powersave_init(struct devfreq *devfreq)
+static int devfreq_powersave_handler(struct devfreq *devfreq,
+ unsigned int event, void *data)
{
- return update_devfreq(devfreq);
+ int ret = 0;
+
+ if (event == DEVFREQ_GOV_START) {
+ mutex_lock(&devfreq->lock);
+ ret = update_devfreq(devfreq);
+ mutex_unlock(&devfreq->lock);
+ }
+
+ return ret;
}
-const struct devfreq_governor devfreq_powersave = {
+static struct devfreq_governor devfreq_powersave = {
.name = "powersave",
- .init = powersave_init,
.get_target_freq = devfreq_powersave_func,
- .no_central_polling = true,
+ .event_handler = devfreq_powersave_handler,
};
+
+static int __init devfreq_powersave_init(void)
+{
+ return devfreq_add_governor(&devfreq_powersave);
+}
+subsys_initcall(devfreq_powersave_init);
+
+static void __exit devfreq_powersave_exit(void)
+{
+ int ret;
+
+ ret = devfreq_remove_governor(&devfreq_powersave);
+ if (ret)
+ pr_err("%s: failed remove governor %d\n", __func__, ret);
+
+ return;
+}
+module_exit(devfreq_powersave_exit);
+MODULE_LICENSE("GPL");