diff options
Diffstat (limited to 'drivers/devfreq/governor_powersave.c')
| -rw-r--r-- | drivers/devfreq/governor_powersave.c | 41 |
1 files changed, 38 insertions, 3 deletions
diff --git a/drivers/devfreq/governor_powersave.c b/drivers/devfreq/governor_powersave.c index 2483a85a266..0c6bed567e6 100644 --- a/drivers/devfreq/governor_powersave.c +++ b/drivers/devfreq/governor_powersave.c @@ -10,6 +10,8 @@ */ #include <linux/devfreq.h> +#include <linux/module.h> +#include "governor.h" static int devfreq_powersave_func(struct devfreq *df, unsigned long *freq) @@ -18,12 +20,45 @@ static int devfreq_powersave_func(struct devfreq *df, * target callback should be able to get ceiling value as * said in devfreq.h */ - *freq = 0; + *freq = df->min_freq; return 0; } -const struct devfreq_governor devfreq_powersave = { +static int devfreq_powersave_handler(struct devfreq *devfreq, + unsigned int event, void *data) +{ + int ret = 0; + + if (event == DEVFREQ_GOV_START) { + mutex_lock(&devfreq->lock); + ret = update_devfreq(devfreq); + mutex_unlock(&devfreq->lock); + } + + return ret; +} + +static struct devfreq_governor devfreq_powersave = { .name = "powersave", .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"); |