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1ST DWC3 glue logic2 3This file documents the parameters for the dwc3-st driver.4This driver controls the glue logic used to configure the dwc3 core on5STiH407 based platforms.6 7Required properties:8 - compatible : must be "st,stih407-dwc3"9 - reg : glue logic base address and USB syscfg ctrl register offset10 - reg-names : should be "reg-glue" and "syscfg-reg"11 - st,syscon : should be phandle to system configuration node which12 encompasses the glue registers13 - resets : list of phandle and reset specifier pairs. There should be two entries, one14 for the powerdown and softreset lines of the usb3 IP15 - reset-names : list of reset signal names. Names should be "powerdown" and "softreset"16See: Documentation/devicetree/bindings/reset/st,stih407-powerdown.yaml17See: Documentation/devicetree/bindings/reset/reset.txt18 19 - #address-cells, #size-cells : should be '1' if the device has sub-nodes20 with 'reg' property21 22 - pinctl-names : A pinctrl state named "default" must be defined23See: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt24 25 - pinctrl-0 : Pin control group26See: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt27 28 - ranges : allows valid 1:1 translation between child's address space and29 parent's address space30 31Sub-nodes:32The dwc3 core should be added as subnode to ST DWC3 glue as shown in the33example below. The DT binding details of dwc3 can be found in:34Documentation/devicetree/bindings/usb/snps,dwc3.yaml35 36NB: The dr_mode property described in [1] is NOT optional for this driver, as the default value37is "otg", which isn't supported by this SoC. Valid dr_mode values for dwc3-st are either "host"38or "device".39 40[1] Documentation/devicetree/bindings/usb/usb-drd.yaml41 42Example:43 44st_dwc3: dwc3@8f94000 {45 compatible = "st,stih407-dwc3";46 reg = <0x08f94000 0x1000>, <0x110 0x4>;47 reg-names = "reg-glue", "syscfg-reg";48 st,syscfg = <&syscfg_core>;49 resets = <&powerdown STIH407_USB3_POWERDOWN>,50 <&softreset STIH407_MIPHY2_SOFTRESET>;51 reset-names = "powerdown", "softreset";52 #address-cells = <1>;53 #size-cells = <1>;54 pinctrl-names = "default";55 pinctrl-0 = <&pinctrl_usb3>;56 ranges;57 58 dwc3: dwc3@9900000 {59 compatible = "snps,dwc3";60 reg = <0x09900000 0x100000>;61 interrupts = <GIC_SPI 155 IRQ_TYPE_NONE>;62 dr_mode = "host";63 phy-names = "usb2-phy", "usb3-phy";64 phys = <&usb2_picophy2>, <&phy_port2 PHY_TYPE_USB3>;65 };66};67