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The device node for Mediatek USB3.0 DRD controller
Required properties:
- compatible : should be "mediatek,<soc-model>-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 "dma_ck";
- phys : see usb-hcd.yaml 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.
it's considered valid for compatibility reasons, not allowed for
new bindings, and use "usb-role-switch" property instead.
- vbus-supply : reference to the VBUS regulator, needed when supports
dual-role mode.
it's considered valid for compatibility reasons, not allowed for
new bindings, and put into a usb-connector node.
see connector/usb-connector.yaml.
- 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
- usb-role-switch : use USB Role Switch to support dual-role switch, but
not extcon; see 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.yaml (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
The port would be added as subnode if use "usb-role-switch" property.
see graph.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>;
};
};
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