FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/usb/dwc3-st.txt

     ST DWC3 glue logic
     
     This file documents the parameters for the dwc3-st driver.
     This driver controls the glue logic used to configure the dwc3 core on
     STiH407 based platforms.
     
     Required properties:
      - compatible   : must be "st,stih407-dwc3"
      - reg          : glue logic base address and USB syscfg ctrl register offset
     - reg-names    : should be "reg-glue" and "syscfg-reg"
     - st,syscon    : should be phandle to system configuration node which
                      encompasses the glue registers
     - resets       : list of phandle and reset specifier pairs. There should be two entries, one
                      for the powerdown and softreset lines of the usb3 IP
     - reset-names  : list of reset signal names. Names should be "powerdown" and "softreset"
    See: Documentation/devicetree/bindings/reset/st,stih407-powerdown.yaml
    See: Documentation/devicetree/bindings/reset/reset.txt
    
     - #address-cells, #size-cells : should be '1' if the device has sub-nodes
       with 'reg' property
    
     - pinctl-names : A pinctrl state named "default" must be defined
    See: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
    
     - pinctrl-0    : Pin control group
    See: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
    
     - ranges       : allows valid 1:1 translation between child's address space and
                      parent's address space
    
    Sub-nodes:
    The dwc3 core should be added as subnode to ST DWC3 glue as shown in the
    example below. The DT binding details of dwc3 can be found in:
    Documentation/devicetree/bindings/usb/snps,dwc3.yaml
    
    NB: The dr_mode property described in [1] is NOT optional for this driver, as the default value
    is "otg", which isn't supported by this SoC. Valid dr_mode values for dwc3-st are either "host"
    or "device".
    
    [1] Documentation/devicetree/bindings/usb/usb-drd.yaml
    
    Example:
    
    st_dwc3: dwc3@8f94000 {
            compatible      = "st,stih407-dwc3";
            reg             = <0x08f94000 0x1000>, <0x110 0x4>;
            reg-names       = "reg-glue", "syscfg-reg";
            st,syscfg       = <&syscfg_core>;
            resets          = <&powerdown STIH407_USB3_POWERDOWN>,
                              <&softreset STIH407_MIPHY2_SOFTRESET>;
            reset-names     = "powerdown", "softreset";
            #address-cells  = <1>;
            #size-cells     = <1>;
            pinctrl-names   = "default";
            pinctrl-0       = <&pinctrl_usb3>;
            ranges;
    
            dwc3: dwc3@9900000 {
                    compatible      = "snps,dwc3";
                    reg             = <0x09900000 0x100000>;
                    interrupts      = <GIC_SPI 155 IRQ_TYPE_NONE>;
                    dr_mode         = "host";
                    phy-names       = "usb2-phy", "usb3-phy";
                    phys            = <&usb2_picophy2>, <&phy_port2 PHY_TYPE_USB3>;
            };
    };

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