The device node for Mediatek USB3 DRD controller
Required properties:
- compatible : should be "mediatek,<soc-model>-mtu3", "mediatek,mtu3",
soc-model is the name of SoC, such as mt8512 etc,
when using "mediatek,mtu3" compatible string, you need SoC specific
ones in addition, one of:
- "mediatek,mt8512-mtu3"
- reg : specifies physical base address and size of the registers
- reg-names: should be
- "ippc" : IP Port Control
- power-domains : a phandle to USB power domain node to control USB's MTCMOS
- 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", "dma_ck" and "xhci_ck";
- phys : list of all the USB PHYs on this HCD
- #address-cells, #size-cells : used for sub-nodes with 'reg' property
- ranges : allows valid 1:1 translation between child's address space and
parent's address space
Optional properties:
- vusb33-supply : regulator of USB AVDD3.3v
- vbus-supply : regulator of VBUS 5v, needed when supports host mode.
Sub-nodes:
Required properties:
- compatible : should be "mediatek,ssusb"
- reg : specifies physical base address and size of the registers
- reg-names: should be
- "mac" : SSUSB MAC, include xHCI and device
- interrupts : interrupt used by xHCI or device
- dr_mode : should be one of "host" or "peripheral",
see : usb/generic.txt
Optional properties:
- pinctrl-names : a pinctrl state named "default" is optional
- pinctrl-0 : pin control group
See: pinctrl/pinctrl-bindings.txt
- device mode:
- maximum-speed : valid arguments are "full-speed", "high-speed",
"super-speed" and "super-speed-plus",
see: usb/generic.txt
- mediatek,force-vbus : force vbus as valid by SW
- host mode (dr_mode is "host"):
- mediatek,u3p-dis-msk : mask to disable u3ports, bit0 for u3port0,
bit1 for u3port1, ... etc;
Example:
usb3: usb@11213e00 {
compatible = "mediatek,mt8512-mtu3", "mediatek,mtu3";
reg = <0x11213e00 0x0100>;
reg-names = "ippc";
phys = <&u2port0 PHY_TYPE_USB2>, <&u2port1 PHY_TYPE_USB2>;
power-domains = <&scpsys MT8512_POWER_DOMAIN_USB>;
clocks = <&infracfg CLK_INFRA_USB_SYS>,
<&topckgen CLK_TOP_SSUSB_TOP_CK_EN>,
<&infracfg CLK_INFRA_ICUSB>;
clock-names = "sys_ck", "ref_ck", "mcu_ck";
vusb33-supply = <reg_3p3v>;
vbus-supply = <&usb_p0_vbus>;
#address-cells = <1>;
#size-cells = <1>;
ranges;
status = "disabled";
ssusb: usb@11210000 {
compatible = "mediatek,ssusb";
reg = <0x11210000 0x3e00>;
interrupts = <GIC_SPI 16 IRQ_TYPE_LEVEL_LOW>;
reg-names = "mac";
dr_mode = "peripheral";
maximum-speed = "high-speed";
status = "disabled";
};
};