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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2012-10-23 01:09:12 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2012-10-23 01:09:12 +0200
commitae0fb4b72c8db7e6c4ef32bc58a43a759ad414b9 (patch)
tree41f5b9014613d865ca69fe25ceb8fcc05c22b2f1 /Documentation
parent021c870ba4ab4bc9a23d5db4e324f50f26d8ab24 (diff)
downloadlinux-ae0fb4b72c8db7e6c4ef32bc58a43a759ad414b9.tar.bz2
PM / QoS: Introduce PM QoS device flags support
Modify the device PM QoS core code to support PM QoS flags requests. First, add a new field of type struct pm_qos_flags called "flags" to struct dev_pm_qos for representing the list of PM QoS flags requests for the given device. Accordingly, add a new "type" field to struct dev_pm_qos_request (along with an enum for representing request types) and a new member called "flr" to its data union for representig flags requests. Second, modify dev_pm_qos_add_request(), dev_pm_qos_update_request(), the internal routine apply_constraint() used by them and their existing callers to cover flags requests as well as latency requests. In particular, dev_pm_qos_add_request() gets a new argument called "type" for specifying the type of a request to be added. Finally, introduce two routines, __dev_pm_qos_flags() and dev_pm_qos_flags(), allowing their callers to check which PM QoS flags have been requested for the given device (the caller is supposed to pass the mask of flags to check as the routine's second argument and examine its return value for the result). Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Jean Pihet <j-pihet@ti.com> Reviewed-by: mark gross <markgross@thegnar.org>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/power/pm_qos_interface.txt2
1 files changed, 1 insertions, 1 deletions
diff --git a/Documentation/power/pm_qos_interface.txt b/Documentation/power/pm_qos_interface.txt
index 17e130a80347..79a2a58425ee 100644
--- a/Documentation/power/pm_qos_interface.txt
+++ b/Documentation/power/pm_qos_interface.txt
@@ -99,7 +99,7 @@ reading the aggregated value does not require any locking mechanism.
From kernel mode the use of this interface is the following:
-int dev_pm_qos_add_request(device, handle, value):
+int dev_pm_qos_add_request(device, handle, type, value):
Will insert an element into the list for that identified device with the
target value. Upon change to this list the new target is recomputed and any
registered notifiers are called only if the target value is now different.