Kernel-4.18.0-80.el8_mediatek,mtu3

The device node for Mediatek USB3.0 DRD controller

Required properties:

• compatible : should be “mediatek,-mtu3”, “mediatek,mtu3”,
  soc-model is the name of SoC, such as mt8173, mt2712 etc,
  when using “mediatek,mtu3” compatible string, you need SoC specific
  ones in addition, one of:
  • “mediatek,mt8173-mtu3”
• reg : specifies physical base address and size of the registers
• reg-names: should be “mac” for device IP and “ippc” for IP port control
• interrupts : interrupt used by the device IP
• power-domains : a phandle to USB power domain node to control USB’s
  mtcmos
• vusb33-supply : regulator of USB avdd3.3v
• clocks : a list of phandle + clock-specifier pairs, one for each
  entry in clock-names
• clock-names : must contain “sys_ck” for clock of controller,
  the following clocks are optional:
  “ref_ck”, “mcu_ck” and “dam_ck”;
• phys : see usb-hcd.txt in the current directory
• dr_mode : should be one of “host”, “peripheral” or “otg”,
  refer to usb/generic.txt

Optional properties:

• #address-cells, #size-cells : should be ‘2’ if the device has sub-nodes
  with ‘reg’ property

• ranges : allows valid 1:1 translation between child’s address space and
  parent’s address space

• extcon : external connector for vbus and idpin changes detection, needed
  when supports dual-role mode.

• vbus-supply : reference to the VBUS regulator, needed when supports
  dual-role mode.

• pinctrl-names : a pinctrl state named “default” is optional, and need be
  defined if auto drd switch is enabled, that means the property dr_mode
  is set as “otg”, and meanwhile the property “mediatek,enable-manual-drd”
  is not set.

• pinctrl-0 : pin control group
  See: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt

• maximum-speed : valid arguments are “super-speed”, “high-speed” and
  “full-speed”; refer to usb/generic.txt

• enable-manual-drd : supports manual dual-role switch via debugfs; usually
  used when receptacle is TYPE-A and also wants to support dual-role
  mode.

• wakeup-source: enable USB remote wakeup of host mode.

• mediatek,syscon-wakeup : phandle to syscon used to access the register
  of the USB wakeup glue layer between SSUSB and SPM; it depends on
  “wakeup-source”, and has two arguments:

  • the first one : register base address of the glue layer in syscon;
  • the second one : hardware version of the glue layer
    • 1 : used by mt8173 etc
    • 2 : used by mt2712 etc

• mediatek,u3p-dis-msk : mask to disable u3ports, bit0 for u3port0,
  bit1 for u3port1, … etc;

additionally the properties from usb-hcd.txt (in the current directory) are
supported.

Sub-nodes:
The xhci should be added as subnode to mtu3 as shown in the following example
if host mode is enabled. The DT binding details of xhci can be found in:
Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.txt

Example:
ssusb: usb@11271000 {
compatible = “mediatek,mt8173-mtu3”;
reg = <0 0x11271000 0 0x3000>,
<0 0x11280700 0 0x0100>;
reg-names = “mac”, “ippc”;
interrupts = <GIC_SPI 64 IRQ_TYPE_LEVEL_LOW>;
phys = <&phy_port0 PHY_TYPE_USB3>,
<&phy_port1 PHY_TYPE_USB2>;
power-domains = <&scpsys MT8173_POWER_DOMAIN_USB>;
clocks = <&topckgen CLK_TOP_USB30_SEL>, <&clk26m>,
<&pericfg CLK_PERI_USB0>,
<&pericfg CLK_PERI_USB1>;
clock-names = “sys_ck”, “ref_ck”;
vusb33-supply = <&mt6397_vusb_reg>;
vbus-supply = <&usb_p0_vbus>;
extcon = <&extcon_usb>;
dr_mode = “otg”;
wakeup-source;
mediatek,syscon-wakeup = <&pericfg 0x400 1>;
#address-cells = <2>;
#size-cells = <2>;
ranges;

usb_host: xhci@11270000 {
    compatible = "mediatek,mt8173-xhci";
    reg = <0 0x11270000 0 0x1000>;
    reg-names = "mac";
    interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_LOW>;
    power-domains = <&scpsys MT8173_POWER_DOMAIN_USB>;
    clocks = <&topckgen CLK_TOP_USB30_SEL>, <&clk26m>;
    clock-names = "sys_ck", "ref_ck";
    vusb33-supply = <&mt6397_vusb_reg>;
};

};