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>

1 files changed, 5 insertions, 0 deletions

diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h
index f7eb7d06df7e..5862475d05f8 100644
--- a/include/linux/devfreq.h
+++ b/include/linux/devfreq.h
@@ -124,6 +124,8 @@ struct devfreq_governor {
  *              touch this.
  * @being_removed       a flag to mark that this object is being removed in
  *                      order to prevent trying to remove the object multiple times.
+ * @min_freq    Limit minimum frequency requested by user (0: none)
+ * @max_freq    Limit maximum frequency requested by user (0: none)
  *
  * This structure stores the devfreq information for a give device.
  *
@@ -149,6 +151,9 @@ struct devfreq {
         void *data; /* private data for governors */
 
         bool being_removed;
+
+        unsigned long min_freq;
+        unsigned long max_freq;
 };
 
 #if defined(CONFIG_PM_DEVFREQ)