1 files changed, 5 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/arm/gic-v3.txt b/Documentation/devicetree/bindings/arm/gic-v3.txt
index ddfade40ac59..7803e77d85cb 100644
--- a/Documentation/devicetree/bindings/arm/gic-v3.txt
+++ b/Documentation/devicetree/bindings/arm/gic-v3.txt
@@ -57,6 +57,8 @@ used to route Message Signalled Interrupts (MSI) to the CPUs.
 These nodes must have the following properties:
 - compatible : Should at least contain  "arm,gic-v3-its".
 - msi-controller : Boolean property. Identifies the node as an MSI controller
+- #msi-cells: Must be <1>. The single msi-cell is the DeviceID of the device
+  which will generate the MSI.
 - reg: Specifies the base physical address and size of the ITS
   registers.
 
@@ -83,6 +85,7 @@ Examples:
                 gic-its@2c200000 {
                         compatible = "arm,gic-v3-its";
                         msi-controller;
+                        #msi-cells = <1>;
                         reg = <0x0 0x2c200000 0 0x200000>;
                 };
         };
@@ -107,12 +110,14 @@ Examples:
                 gic-its@2c200000 {
                         compatible = "arm,gic-v3-its";
                         msi-controller;
+                        #msi-cells = <1>;
                         reg = <0x0 0x2c200000 0 0x200000>;
                 };
 
                 gic-its@2c400000 {
                         compatible = "arm,gic-v3-its";
                         msi-controller;
+                        #msi-cells = <1>;
                         reg = <0x0 0x2c400000 0 0x200000>;
                 };
         };