Adds an optional interrupt property to the optee binding.

Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
---
 .../devicetree/bindings/arm/firmware/linaro,optee-tz.yaml  | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/arm/firmware/linaro,optee-tz.yaml b/Documentation/devicetree/bindings/arm/firmware/linaro,optee-tz.yaml
index c24047c1fdd5..40c9f1901e3f 100644
--- a/Documentation/devicetree/bindings/arm/firmware/linaro,optee-tz.yaml
+++ b/Documentation/devicetree/bindings/arm/firmware/linaro,optee-tz.yaml

@@ -24,6 +24,12 @@ properties:
   compatible:
     const: linaro,optee-tz
 
+  interrupts:
+    maxItems: 1
+    description: |
+      This interrupt which is used to signal an event by the secure world
+      software is expected to be edge-triggered.
+
   method:
     enum: [smc, hvc]
     description: |

@@ -46,6 +52,7 @@ examples:
         optee  {
             compatible = "linaro,optee-tz";
             method = "smc";
+            interrupts = <0 187 1>;
         };
     };