Documentation/devicetree/bindings/usb/dwc3-st.txt

   1 ST DWC3 glue logic
   2
   3 This file documents the parameters for the dwc3-st driver.
   4 This driver controls the glue logic used to configure the dwc3 core on
   5 STiH407 based platforms.
   6
   7 Required properties:
   8  - compatible   : must be "st,stih407-dwc3"
   9  - reg          : glue logic base address and USB syscfg ctrl register offset
  10  - reg-names    : should be "reg-glue" and "syscfg-reg"
  11  - st,syscon    : should be phandle to system configuration node which
  12                   encompasses the glue registers
  13  - resets       : list of phandle and reset specifier pairs. There should be two entries, one
  14                   for the powerdown and softreset lines of the usb3 IP
  15  - reset-names  : list of reset signal names. Names should be "powerdown" and "softreset"
  16 See: Documentation/devicetree/bindings/reset/st,sti-powerdown.txt
  17 See: Documentation/devicetree/bindings/reset/reset.txt
  18
  19  - #address-cells, #size-cells : should be '1' if the device has sub-nodes
  20    with 'reg' property
  21
  22  - pinctl-names : A pinctrl state named "default" must be defined
  23 See: Documentation/devicetree/bindings/pinctrl/pinctrl-binding.txt
  24
  25  - pinctrl-0    : Pin control group
  26 See: Documentation/devicetree/bindings/pinctrl/pinctrl-binding.txt
  27
  28  - ranges       : allows valid 1:1 translation between child's address space and
  29                   parent's address space
  30
  31 Sub-nodes:
  32 The dwc3 core should be added as subnode to ST DWC3 glue as shown in the
  33 example below. The DT binding details of dwc3 can be found in:
  34 Documentation/devicetree/bindings/usb/dwc3.txt
  35
  36 NB: The dr_mode property described in [1] is NOT optional for this driver, as the default value
  37 is "otg", which isn't supported by this SoC. Valid dr_mode values for dwc3-st are either "host"
  38 or "device".
  39
  40 [1] Documentation/devicetree/bindings/usb/generic.txt
  41
  42 Example:
  43
  44 st_dwc3: dwc3@8f94000 {
  45         status          = "disabled";
  46         compatible      = "st,stih407-dwc3";
  47         reg             = <0x08f94000 0x1000>, <0x110 0x4>;
  48         reg-names       = "reg-glue", "syscfg-reg";
  49         st,syscfg       = <&syscfg_core>;
  50         resets          = <&powerdown STIH407_USB3_POWERDOWN>,
  51                           <&softreset STIH407_MIPHY2_SOFTRESET>;
  52         reset-names     = "powerdown", "softreset";
  53         #address-cells  = <1>;
  54         #size-cells     = <1>;
  55         pinctrl-names   = "default";
  56         pinctrl-0       = <&pinctrl_usb3>;
  57         ranges;
  58
  59         dwc3: dwc3@9900000 {
  60                 compatible      = "snps,dwc3";
  61                 reg             = <0x09900000 0x100000>;
  62                 interrupts      = <GIC_SPI 155 IRQ_TYPE_NONE>;
  63                 dr_mode         = "host";
  64                 phy-names       = "usb2-phy", "usb3-phy";
  65                 phys            = <&usb2_picophy2>, <&phy_port2 PHY_TYPE_USB3>;
  66         };
  67 };