PM / QoS: Add type to dev_pm_qos_add_ancestor_request() arguments
Rework dev_pm_qos_add_ancestor_request() so that device PM QoS type
is passed to it as the third argument and make it support the
DEV_PM_QOS_LATENCY_TOLERANCE device PM QoS type (in addition to
DEV_PM_QOS_RESUME_LATENCY).
That will allow the drivers of devices without latency tolerance
hardware support to use their ancestors having it as proxies for
their latency tolerance requirements.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/base/power/qos.c b/drivers/base/power/qos.c
index 84756f7..36b9eb4 100644
--- a/drivers/base/power/qos.c
+++ b/drivers/base/power/qos.c
@@ -565,20 +565,32 @@
* dev_pm_qos_add_ancestor_request - Add PM QoS request for device's ancestor.
* @dev: Device whose ancestor to add the request for.
* @req: Pointer to the preallocated handle.
+ * @type: Type of the request.
* @value: Constraint latency value.
*/
int dev_pm_qos_add_ancestor_request(struct device *dev,
- struct dev_pm_qos_request *req, s32 value)
+ struct dev_pm_qos_request *req,
+ enum dev_pm_qos_req_type type, s32 value)
{
struct device *ancestor = dev->parent;
int ret = -ENODEV;
- while (ancestor && !ancestor->power.ignore_children)
- ancestor = ancestor->parent;
+ switch (type) {
+ case DEV_PM_QOS_RESUME_LATENCY:
+ while (ancestor && !ancestor->power.ignore_children)
+ ancestor = ancestor->parent;
+ break;
+ case DEV_PM_QOS_LATENCY_TOLERANCE:
+ while (ancestor && !ancestor->power.set_latency_tolerance)
+ ancestor = ancestor->parent;
+
+ break;
+ default:
+ ancestor = NULL;
+ }
if (ancestor)
- ret = dev_pm_qos_add_request(ancestor, req,
- DEV_PM_QOS_RESUME_LATENCY, value);
+ ret = dev_pm_qos_add_request(ancestor, req, type, value);
if (ret < 0)
req->dev = NULL;