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diff --git a/kernel/Documentation/devicetree/bindings/mmc/sdhci-spear.txt b/kernel/Documentation/devicetree/bindings/mmc/sdhci-spear.txt
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+++ b/kernel/Documentation/devicetree/bindings/mmc/sdhci-spear.txt
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+* SPEAr SDHCI Controller
+
+This file documents differences between the core properties in mmc.txt
+and the properties used by the sdhci-spear driver.
+
+Required properties:
+- compatible: "st,spear300-sdhci"
+
+Optional properties:
+- cd-gpios: card detect gpio, with zero flags.
+
+Example:
+
+	sdhci@fc000000 {
+		compatible = "st,spear300-sdhci";
+		reg = <0xfc000000 0x1000>;
+		cd-gpios = <&gpio0 6 0>;
+	};