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authorJean Pihet <j-pihet@ti.com>2011-08-25 15:35:34 +0200
committerRafael J. Wysocki <rjw@sisk.pl>2011-08-25 15:35:34 +0200
commitabe98ec2d86279fe821c9051003a0abc43444f15 (patch)
tree014f3ce775504218121194f54e2ba5b88c08c777 /include/linux/pm_qos.h
parent4e1779baaa542c83b459b0a56585e0c1a04c7782 (diff)
downloadop-kernel-dev-abe98ec2d86279fe821c9051003a0abc43444f15.zip
op-kernel-dev-abe98ec2d86279fe821c9051003a0abc43444f15.tar.gz
PM QoS: Generalize and export constraints management code
In preparation for the per-device constratins support: - rename update_target to pm_qos_update_target - generalize and export pm_qos_update_target for usage by the upcoming per-device latency constraints framework: * operate on struct pm_qos_constraints for constraints management, * introduce an 'action' parameter for constraints add/update/remove, * the return value indicates if the aggregated constraint value has changed, - update the internal code to operate on struct pm_qos_constraints - add a NULL pointer check in the API functions 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>
Diffstat (limited to 'include/linux/pm_qos.h')
-rw-r--r--include/linux/pm_qos.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/pm_qos.h b/include/linux/pm_qos.h
index 9772311..84aa150 100644
--- a/include/linux/pm_qos.h
+++ b/include/linux/pm_qos.h
@@ -44,7 +44,16 @@ struct pm_qos_constraints {
struct blocking_notifier_head *notifiers;
};
+/* Action requested to pm_qos_update_target */
+enum pm_qos_req_action {
+ PM_QOS_ADD_REQ, /* Add a new request */
+ PM_QOS_UPDATE_REQ, /* Update an existing request */
+ PM_QOS_REMOVE_REQ /* Remove an existing request */
+};
+
#ifdef CONFIG_PM
+int pm_qos_update_target(struct pm_qos_constraints *c, struct plist_node *node,
+ enum pm_qos_req_action action, int value);
void pm_qos_add_request(struct pm_qos_request *req, int pm_qos_class,
s32 value);
void pm_qos_update_request(struct pm_qos_request *req,
@@ -56,6 +65,11 @@ int pm_qos_add_notifier(int pm_qos_class, struct notifier_block *notifier);
int pm_qos_remove_notifier(int pm_qos_class, struct notifier_block *notifier);
int pm_qos_request_active(struct pm_qos_request *req);
#else
+static inline int pm_qos_update_target(struct pm_qos_constraints *c,
+ struct plist_node *node,
+ enum pm_qos_req_action action,
+ int value)
+ { return 0; }
static inline void pm_qos_add_request(struct pm_qos_request *req,
int pm_qos_class, s32 value)
{ return; }
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