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Diffstat (limited to 'Bindings/usb/dwc3-st.txt')
| -rw-r--r-- | Bindings/usb/dwc3-st.txt | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/Bindings/usb/dwc3-st.txt b/Bindings/usb/dwc3-st.txt new file mode 100644 index 00000000000..4aa368447b1 --- /dev/null +++ b/Bindings/usb/dwc3-st.txt @@ -0,0 +1,66 @@ +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>; + }; +}; |