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PM / devfreq: add min/max_freq limit requested by users.

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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>
This commit is contained in:
MyungJoo Ham
2011-12-09 16:42:19 +09:00
parent a95e1f5dbc
commit 6530b9dea1
6 changed files with 101 additions and 8 deletions
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15
drivers/devfreq/governor_userspace.c
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@@ -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;
}