[PATCH v2 3/3] dt-bindings: drm/msm/gpu: Document a5xx / a6xx zap shader region

[Jordan Crouse <jcrouse@xxxxxxxxxxxxxx>]

Describe the zap-shader node that defines a reserved memory region
to store the zap shader.

Signed-off-by: Jordan Crouse <jcrouse@xxxxxxxxxxxxxx>
---

 Documentation/devicetree/bindings/display/msm/gpu.txt | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/msm/gpu.txt b/Documentation/devicetree/bindings/display/msm/gpu.txt
index aad1aef..1e6d870 100644
--- a/Documentation/devicetree/bindings/display/msm/gpu.txt
+++ b/Documentation/devicetree/bindings/display/msm/gpu.txt
@@ -25,6 +25,9 @@ Required properties:
 - qcom,gmu: For GMU attached devices a phandle to the GMU device that will
   control the power for the GPU. Applicable targets:
     - qcom,adreno-630.2
+- zap-shader: For a5xx and a6xx devices this node contains a memory-region that
+  points to reserved memory to store the zap shader that can be used to help
+  bring the GPU out of secure mode.
 
 Example 3xx/4xx/a5xx:
 
@@ -71,5 +74,9 @@ Example a6xx (with GMU):
 		operating-points-v2 = <&gpu_opp_table>;
 
 		qcom,gmu = <&gmu>;
+
+		zap-shader {
+			memory-region = <&zap_shader_region>;
+		};
 	};
 };
-- 
2.7.4