PM QoS: Reorganize data structs

In preparation for the per-device constratins support, re-organize
the data strctures:
 - add a struct pm_qos_constraints which contains the constraints
 related data
 - update struct pm_qos_object contents to the PM QoS internal object
 data. Add a pointer to struct pm_qos_constraints
 - update the internal code to use the new data structs.

Signed-off-by: Jean Pihet <j-pihet@ti.com>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>

1 files changed, 19 insertions, 0 deletions

diff --git a/include/linux/pm_qos.h b/include/linux/pm_qos.h
index 6b0968f8bc6e..97723113ae92 100644
--- a/include/linux/pm_qos.h
+++ b/include/linux/pm_qos.h
@@ -25,6 +25,25 @@ struct pm_qos_request {
         int pm_qos_class;
 };
 
+enum pm_qos_type {
+        PM_QOS_UNITIALIZED,
+        PM_QOS_MAX,             /* return the largest value */
+        PM_QOS_MIN              /* return the smallest value */
+};
+
+/*
+ * Note: The lockless read path depends on the CPU accessing
+ * target_value atomically.  Atomic access is only guaranteed on all CPU
+ * types linux supports for 32 bit quantites
+ */
+struct pm_qos_constraints {
+        struct plist_head list;
+        s32 target_value;       /* Do not change to 64 bit */
+        s32 default_value;
+        enum pm_qos_type type;
+        struct blocking_notifier_head *notifiers;
+};
+
 #ifdef CONFIG_PM
 void pm_qos_add_request(struct pm_qos_request *req, int pm_qos_class,
                         s32 value);