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,sti-powerdown.txt 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/dwc3.txt 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/generic.txt 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 = ; dr_mode = "host"; phy-names = "usb2-phy", "usb3-phy"; phys = <&usb2_picophy2>, <&phy_port2 PHY_TYPE_USB3>; }; };