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-rw-r--r--Documentation/power/pm_qos_interface.txt7
1 files changed, 6 insertions, 1 deletions
diff --git a/Documentation/power/pm_qos_interface.txt b/Documentation/power/pm_qos_interface.txt
index 49adb1a33514..c40866e8b957 100644
--- a/Documentation/power/pm_qos_interface.txt
+++ b/Documentation/power/pm_qos_interface.txt
@@ -1,4 +1,4 @@
-PM quality of Service interface.
+PM Quality Of Service Interface.
This interface provides a kernel and user mode interface for registering
performance expectations by drivers, subsystems and user space applications on
@@ -7,6 +7,11 @@ one of the parameters.
Currently we have {cpu_dma_latency, network_latency, network_throughput} as the
initial set of pm_qos parameters.
+Each parameters have defined units:
+ * latency: usec
+ * timeout: usec
+ * throughput: kbs (kilo bit / sec)
+
The infrastructure exposes multiple misc device nodes one per implemented
parameter. The set of parameters implement is defined by pm_qos_power_init()
and pm_qos_params.h. This is done because having the available parameters