This is the PHY chip for USB OTG on PXA platforms.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
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 .../devicetree/bindings/phy/phy-pxa-usb.txt     | 17 +++++++++++++++++
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+Marvell PXA USB PHY
+-------------------
+
+Required properties:
+- compatible: one of: "marvell,mmp2-usb-phy", "marvell,pxa910-usb-phy",
+	"marvell,pxa168-usb-phy",
+- #phy-cells: must be 0
+
+Example:
+	usb-phy: usbphy at d4207000 {
+		compatible = "marvell,mmp2-usb-phy";
+		reg = <0xd4207000 0x40>;
+		#phy-cells = <0>;
+		status = "okay";
+	};
+This document explains only the device tree data binding. For general
+information about PHY subsystem refer to Documentation/phy.txt