diff options
| author | MyungJoo Ham <myungjoo.ham@samsung.com> | 2011-12-09 08:42:19 +0100 |
|---|---|---|
| committer | MyungJoo Ham <myungjoo.ham@samsung.com> | 2012-01-20 02:12:38 +0100 |
| commit | 6530b9dea1b7f33eaf79ba625e3a99f2455f3eb1 (patch) | |
| tree | 70beddf04779d5941ba6ef851b30e02c7fa0c86c /drivers/devfreq/governor_userspace.c | |
| parent | PM / devfreq: fixed syntax errors. (diff) | |
| download | linux-6530b9dea1b7f33eaf79ba625e3a99f2455f3eb1.tar.xz linux-6530b9dea1b7f33eaf79ba625e3a99f2455f3eb1.zip | |
PM / devfreq: add min/max_freq limit requested by users.
The frequency requested to devfreq device driver from devfreq governors
is restricted by min_freq and max_freq input.
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Diffstat (limited to 'drivers/devfreq/governor_userspace.c')
| -rw-r--r-- | drivers/devfreq/governor_userspace.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/devfreq/governor_userspace.c b/drivers/devfreq/governor_userspace.c index 4f8b563da782..0681246fc89d 100644 --- a/drivers/devfreq/governor_userspace.c +++ b/drivers/devfreq/governor_userspace.c @@ -25,10 +25,19 @@ static int devfreq_userspace_func(struct devfreq *df, unsigned long *freq) { struct userspace_data *data = df->data; - if (!data->valid) + if (data->valid) { + unsigned long adjusted_freq = data->user_frequency; + + if (df->max_freq && adjusted_freq > df->max_freq) + adjusted_freq = df->max_freq; + + if (df->min_freq && adjusted_freq < df->min_freq) + adjusted_freq = df->min_freq; + + *freq = adjusted_freq; + } else { *freq = df->previous_freq; /* No user freq specified yet */ - else - *freq = data->user_frequency; + } return 0; } |