Kernel-4.18.0-80.el8_omap-usb

OMAP GLUE AND OTHER OMAP SPECIFIC COMPONENTS

OMAP MUSB GLUE

• compatible : Should be “ti,omap4-musb” or “ti,omap3-musb”
• ti,hwmods : must be “usb_otg_hs”
• multipoint : Should be “1” indicating the musb controller supports
  multipoint. This is a MUSB configuration-specific setting.
• num-eps : Specifies the number of endpoints. This is also a
  MUSB configuration-specific setting. Should be set to “16”
• ram-bits : Specifies the ram address size. Should be set to “12”
• interface-type : This is a board specific setting to describe the type of
  interface between the controller and the phy. It should be “0” or “1”
  specifying ULPI and UTMI respectively.
• mode : Should be “3” to represent OTG. “1” signifies HOST and “2”
  represents PERIPHERAL.
• power : Should be “50”. This signifies the controller can supply up to
  100mA when operating in host mode.
• usb-phy : the phandle for the PHY device
• phys : the phandle for the PHY device (used by generic PHY framework)
• phy-names : the names of the PHY corresponding to the PHYs present in the
  phy phandle.

Optional properties:

• ctrl-module : phandle of the control module this glue uses to write to
  mailbox

SOC specific device node entry
usb_otg_hs: usb_otg_hs@4a0ab000 {
compatible = “ti,omap4-musb”;
ti,hwmods = “usb_otg_hs”;
multipoint = <1>;
num-eps = <16>;
ram-bits = <12>;
ctrl-module = <&omap_control_usb>;
phys = <&usb2_phy>;
phy-names = “usb2-phy”;
};

Board specific device node entry
&usb_otg_hs {
interface-type = <1>;
mode = <3>;
power = <50>;
};

OMAP DWC3 GLUE

• compatible : Should be
  • “ti,dwc3” for OMAP5 and DRA7
  • “ti,am437x-dwc3” for AM437x
• ti,hwmods : Should be “usb_otg_ss”
• reg : Address and length of the register set for the device.
• interrupts : The irq number of this device that is used to interrupt the
  MPU
• #address-cells, #size-cells : Must be present if the device has sub-nodes
• utmi-mode : controls the source of UTMI/PIPE status for VBUS and OTG ID.
  It should be set to “1” for HW mode and “2” for SW mode.
• ranges: the child address space are mapped 1:1 onto the parent address space

Optional Properties:

• extcon : phandle for the extcon device omap dwc3 uses to detect
  connect/disconnect events.
• vbus-supply : phandle to the regulator device tree node if needed.

Sub-nodes:
The dwc3 core should be added as subnode to omap dwc3 glue.

• dwc3 :
  The binding details of dwc3 can be found in:
  Documentation/devicetree/bindings/usb/dwc3.txt

omap_dwc3 {
compatible = “ti,dwc3”;
ti,hwmods = “usb_otg_ss”;
reg = <0x4a020000 0x1ff>;
interrupts = <0 93 4>;
#address-cells = <1>;
#size-cells = <1>;
utmi-mode = <2>;
ranges;
};