dt-bindings: drm/msm/gpu: Document firmware-name

The firmware-name property in the zap node can be used to specify a
device specific zap firmware.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>

diff --git a/Documentation/devicetree/bindings/display/msm/gpu.txt b/Documentation/devicetree/bindings/display/msm/gpu.txt
index 3e6cd3f..7edc298 100644 (file)
--- a/Documentation/devicetree/bindings/display/msm/gpu.txt
+++ b/Documentation/devicetree/bindings/display/msm/gpu.txt
@@ -33,6 +33,8 @@ Required properties:
 - 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.
+- firmware-name: optional property of the 'zap-shader' node, listing the
+  relative path of the device specific zap firmware.
 
 Example 3xx/4xx/a5xx:
 
@@ -85,6 +87,7 @@ Example a6xx (with GMU):
 
                zap-shader {
                        memory-region = <&zap_shader_region>;
+                       firmware-name = "qcom/LENOVO/81JL/qcdxkmsuc850.mbn"
                };
        };
 };