1 files changed, 20 insertions, 5 deletions

diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h
index 98ce8124b1cc..281c72a3b9d5 100644
--- a/include/linux/devfreq.h
+++ b/include/linux/devfreq.h
@@ -44,6 +44,14 @@ struct devfreq_dev_status {
         void *private_data;
 };
 
+/*
+ * The resulting frequency should be at most this. (this bound is the
+ * least upper bound; thus, the resulting freq should be lower or same)
+ * If the flag is not set, the resulting frequency should be at most the
+ * bound (greatest lower bound)
+ */
+#define DEVFREQ_FLAG_LEAST_UPPER_BOUND          0x1
+
 /**
  * struct devfreq_dev_profile - Devfreq's user device profile
  * @initial_freq        The operating frequency when devfreq_add_device() is
@@ -54,6 +62,8 @@ struct devfreq_dev_status {
  *                      higher than any operable frequency, set maximum.
  *                      Before returning, target function should set
  *                      freq at the current frequency.
+ *                      The "flags" parameter's possible values are
+ *                      explained above with "DEVFREQ_FLAG_*" macros.
  * @get_dev_status      The device should provide the current performance
  *                      status to devfreq, which is used by governors.
  * @exit                An optional callback that is called when devfreq
@@ -66,7 +76,7 @@ struct devfreq_dev_profile {
         unsigned long initial_freq;
         unsigned int polling_ms;
 
-        int (*target)(struct device *dev, unsigned long *freq);
+        int (*target)(struct device *dev, unsigned long *freq, u32 flags);
         int (*get_dev_status)(struct device *dev,
                               struct devfreq_dev_status *stat);
         void (*exit)(struct device *dev);
@@ -124,6 +134,8 @@ 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 +161,9 @@ struct devfreq {
         void *data; /* private data for governors */
 
         bool being_removed;
+
+        unsigned long min_freq;
+        unsigned long max_freq;
 };
 
 #if defined(CONFIG_PM_DEVFREQ)
@@ -160,7 +175,7 @@ extern int devfreq_remove_device(struct devfreq *devfreq);
 
 /* Helper functions for devfreq user device driver with OPP. */
 extern struct opp *devfreq_recommended_opp(struct device *dev,
-                                           unsigned long *freq);
+                                           unsigned long *freq, u32 flags);
 extern int devfreq_register_opp_notifier(struct device *dev,
                                          struct devfreq *devfreq);
 extern int devfreq_unregister_opp_notifier(struct device *dev,
@@ -200,18 +215,18 @@ struct devfreq_simple_ondemand_data {
 static struct devfreq *devfreq_add_device(struct device *dev,
                                           struct devfreq_dev_profile *profile,
                                           struct devfreq_governor *governor,
-                                          void *data);
+                                          void *data)
 {
         return NULL;
 }
 
-static int devfreq_remove_device(struct devfreq *devfreq);
+static int devfreq_remove_device(struct devfreq *devfreq)
 {
         return 0;
 }
 
 static struct opp *devfreq_recommended_opp(struct device *dev,
-                                           unsigned long *freq)
+                                           unsigned long *freq, u32 flags)
 {
         return -EINVAL;
 }