diff --git a/Documentation/devicetree/bindings/arm/pmu.txt b/Documentation/devicetree/bindings/arm/pmu.txt
index 75ef91d08f3bd2cbc402326598ead0e34663e790..f52d05660dc96d085a7257e6457cd6bee5f27de2 100644
--- a/Documentation/devicetree/bindings/arm/pmu.txt
+++ b/Documentation/devicetree/bindings/arm/pmu.txt
@@ -24,6 +24,13 @@ Required properties:
 
 Optional properties:
 
+- interrupt-affinity : Valid only when using SPIs, specifies a list of phandles
+                       to CPU nodes corresponding directly to the affinity of
+		       the SPIs listed in the interrupts property.
+
+		       This property should be present when there is more than
+		       a single SPI.
+
 - qcom,no-pc-write : Indicates that this PMU doesn't support the 0xc and 0xd
                      events.