linux/Documentation/devicetree/bindings/usb/omap-usb.txt

OMAP GLUE AND OTHER OMAP SPECIFIC COMPONENTS

OMAP MUSB GLUE
 - compatible : Should be "ti,omap4-musb" or "ti,omap3-musb"
 - ti,hwmods : must be "usb_otg_hs"
 - ti,has-mailbox : to specify that omap uses an external mailbox
   (in control module) to communicate with the musb core during device connect
   and disconnect.
 - multipoint : Should be "1" indicating the musb controller supports
   multipoint. This is a MUSB configuration-specific setting.
 - num_eps : Specifies the number of endpoints. This is also a
   MUSB configuration-specific setting. Should be set to "16"
 - ram_bits : Specifies the ram address size. Should be set to "12"
 - interface_type : This is a board specific setting to describe the type of
   interface between the controller and the phy. It should be "0" or "1"
   specifying ULPI and UTMI respectively.
 - mode : Should be "3" to represent OTG. "1" signifies HOST and "2"
   represents PERIPHERAL.
 - power : Should be "50". This signifies the controller can supply upto
   100mA when operating in host mode.

Optional properties:
 - ctrl-module : phandle of the control module this glue uses to write to
   mailbox

SOC specific device node entry
usb_otg_hs: usb_otg_hs@4a0ab000 {
	compatible = "ti,omap4-musb";
	ti,hwmods = "usb_otg_hs";
	ti,has-mailbox;
	multipoint = <1>;
	num_eps = <16>;
	ram_bits = <12>;
	ctrl-module = <&omap_control_usb>;
};

Board specific device node entry
&usb_otg_hs {
	interface_type = <1>;
	mode = <3>;
	power = <50>;
};

OMAP CONTROL USB

Required properties:
 - compatible: Should be "ti,omap-control-usb"
 - reg : Address and length of the register set for the device. It contains
   the address of "control_dev_conf" and "otghs_control" or "phy_power_usb"
   depending upon omap4 or omap5.
 - reg-names: The names of the register addresses corresponding to the registers
   filled in "reg".
 - ti,type: This is used to differentiate whether the control module has
   usb mailbox or usb3 phy power. omap4 has usb mailbox in control module to
   notify events to the musb core and omap5 has usb3 phy power register to
   power on usb3 phy. Should be "1" if it has mailbox and "2" if it has usb3
   phy power.

omap_control_usb: omap-control-usb@4a002300 {
	compatible = "ti,omap-control-usb";
	reg = <0x4a002300 0x4>,
	      <0x4a00233c 0x4>;
	reg-names = "control_dev_conf", "otghs_control";
	ti,type = <1>;
};