FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/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"
      - 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 up to
       100mA when operating in host mode.
     - usb-phy : the phandle for the PHY device
     - phys : the phandle for the PHY device (used by generic PHY framework)
     - phy-names : the names of the PHY corresponding to the PHYs present in the
       *phy* phandle.
    
    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";
            multipoint = <1>;
            num-eps = <16>;
            ram-bits = <12>;
            ctrl-module = <&omap_control_usb>;
            phys = <&usb2_phy>;
            phy-names = "usb2-phy";
    };
    
    Board specific device node entry
    &usb_otg_hs {
            interface-type = <1>;
            mode = <3>;
            power = <50>;
    };
    
    OMAP DWC3 GLUE
     - compatible : Should be
            * "ti,dwc3" for OMAP5 and DRA7
            * "ti,am437x-dwc3" for AM437x
     - ti,hwmods : Should be "usb_otg_ss"
     - reg : Address and length of the register set for the device.
     - interrupts : The irq number of this device that is used to interrupt the
       MPU
     - #address-cells, #size-cells : Must be present if the device has sub-nodes
     - utmi-mode : controls the source of UTMI/PIPE status for VBUS and OTG ID.
       It should be set to "1" for HW mode and "2" for SW mode.
     - ranges: the child address space are mapped 1:1 onto the parent address space
    
    Optional Properties:
     - extcon : phandle for the extcon device omap dwc3 uses to detect
       connect/disconnect events.
     - vbus-supply : phandle to the regulator device tree node if needed.
    
    Sub-nodes:
    The dwc3 core should be added as subnode to omap dwc3 glue.
    - dwc3 :
       The binding details of dwc3 can be found in:
       Documentation/devicetree/bindings/usb/snps,dwc3.yaml
    
    omap_dwc3 {
            compatible = "ti,dwc3";
            ti,hwmods = "usb_otg_ss";
            reg = <0x4a020000 0x1ff>;
            interrupts = <0 93 4>;
            #address-cells = <1>;
            #size-cells = <1>;
            utmi-mode = <2>;
            ranges;
    };
    

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