FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/phy/bcm-ns-usb2-phy.txt

     Driver for Broadcom Northstar USB 2.0 PHY
     
     Required properties:
     - compatible: brcm,ns-usb2-phy
     - reg: iomem address range of DMU (Device Management Unit)
     - reg-names: "dmu", the only needed & supported reg right now
     - clocks: USB PHY reference clock
     - clock-names: "phy-ref-clk", the only needed & supported clock right now
     
    To initialize USB 2.0 PHY driver needs to setup PLL correctly. To do this it
    requires passing phandle to the USB PHY reference clock.
    
    Example:
            usb2-phy {
                    compatible = "brcm,ns-usb2-phy";
                    reg = <0x1800c000 0x1000>;
                    reg-names = "dmu";
                    #phy-cells = <0>;
                    clocks = <&genpll BCM_NSP_GENPLL_USB_PHY_REF_CLK>;
                    clock-names = "phy-ref-clk";
            };

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