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diff --git a/Documentation/devicetree/bindings/arm/tegra.txt b/Documentation/devicetree/bindings/arm/tegra.txt
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+NVIDIA Tegra device tree bindings
+-------------------------------------------
+
+Boards with the tegra20 SoC shall have the following properties:
+
+Required root node property:
+
+compatible = "nvidia,tegra20";
+
+Boards with the tegra30 SoC shall have the following properties:
+
+Required root node property:
+
+compatible = "nvidia,tegra30";