x86/xen: split off mmu_hvm.c

[linux-2.6-microblaze.git] / drivers / devfreq / governor.h

diff --git a/drivers/devfreq/governor.h b/drivers/devfreq/governor.h
index 71576b8..a4f2fa1 100644 (file)
--- a/drivers/devfreq/governor.h
+++ b/drivers/devfreq/governor.h
@@ -25,6 +25,35 @@
 #define DEVFREQ_GOV_SUSPEND                    0x4
 #define DEVFREQ_GOV_RESUME                     0x5
 
+/**
+ * struct devfreq_governor - Devfreq policy governor
+ * @node:              list node - contains registered devfreq governors
+ * @name:              Governor's name
+ * @immutable:         Immutable flag for governor. If the value is 1,
+ *                     this govenror is never changeable to other governor.
+ * @get_target_freq:   Returns desired operating frequency for the device.
+ *                     Basically, get_target_freq will run
+ *                     devfreq_dev_profile.get_dev_status() to get the
+ *                     status of the device (load = busy_time / total_time).
+ *                     If no_central_polling is set, this callback is called
+ *                     only with update_devfreq() notified by OPP.
+ * @event_handler:      Callback for devfreq core framework to notify events
+ *                      to governors. Events include per device governor
+ *                      init and exit, opp changes out of devfreq, suspend
+ *                      and resume of per device devfreq during device idle.
+ *
+ * Note that the callbacks are called with devfreq->lock locked by devfreq.
+ */
+struct devfreq_governor {
+       struct list_head node;
+
+       const char name[DEVFREQ_NAME_LEN];
+       const unsigned int immutable;
+       int (*get_target_freq)(struct devfreq *this, unsigned long *freq);
+       int (*event_handler)(struct devfreq *devfreq,
+                               unsigned int event, void *data);
+};
+
 /* Caution: devfreq->lock must be locked before calling update_devfreq */
 extern int update_devfreq(struct devfreq *devfreq);