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1The device node for Mediatek USB3.0 DRD controller
2
3Required properties:
4 - compatible : should be "mediatek,<soc-model>-mtu3", "mediatek,mtu3",
5 soc-model is the name of SoC, such as mt8173, mt2712 etc,
6 when using "mediatek,mtu3" compatible string, you need SoC specific
7 ones in addition, one of:
8 - "mediatek,mt8173-mtu3"
9 - reg : specifies physical base address and size of the registers
10 - reg-names: should be "mac" for device IP and "ippc" for IP port control
11 - interrupts : interrupt used by the device IP
12 - power-domains : a phandle to USB power domain node to control USB's
13 mtcmos
14 - vusb33-supply : regulator of USB avdd3.3v
15 - clocks : a list of phandle + clock-specifier pairs, one for each
16 entry in clock-names
17 - clock-names : must contain "sys_ck" for clock of controller,
18 the following clocks are optional:
19 "ref_ck", "mcu_ck" and "dma_ck";
20 - phys : see usb-hcd.yaml in the current directory
21 - dr_mode : should be one of "host", "peripheral" or "otg",
22 refer to usb/generic.txt
23
24Optional properties:
25 - #address-cells, #size-cells : should be '2' if the device has sub-nodes
26 with 'reg' property
27 - ranges : allows valid 1:1 translation between child's address space and
28 parent's address space
29 - extcon : external connector for vbus and idpin changes detection, needed
30 when supports dual-role mode.
31 it's considered valid for compatibility reasons, not allowed for
32 new bindings, and use "usb-role-switch" property instead.
33 - vbus-supply : reference to the VBUS regulator, needed when supports
34 dual-role mode.
35 it's considered valid for compatibility reasons, not allowed for
36 new bindings, and put into a usb-connector node.
37 see connector/usb-connector.yaml.
38 - pinctrl-names : a pinctrl state named "default" is optional, and need be
39 defined if auto drd switch is enabled, that means the property dr_mode
40 is set as "otg", and meanwhile the property "mediatek,enable-manual-drd"
41 is not set.
42 - pinctrl-0 : pin control group
43 See: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
44
45 - maximum-speed : valid arguments are "super-speed", "high-speed" and
46 "full-speed"; refer to usb/generic.txt
47 - usb-role-switch : use USB Role Switch to support dual-role switch, but
48 not extcon; see usb/generic.txt.
49 - enable-manual-drd : supports manual dual-role switch via debugfs; usually
50 used when receptacle is TYPE-A and also wants to support dual-role
51 mode.
52 - wakeup-source: enable USB remote wakeup of host mode.
53 - mediatek,syscon-wakeup : phandle to syscon used to access the register
54 of the USB wakeup glue layer between SSUSB and SPM; it depends on
55 "wakeup-source", and has two arguments:
56 - the first one : register base address of the glue layer in syscon;
57 - the second one : hardware version of the glue layer
58 - 1 : used by mt8173 etc
59 - 2 : used by mt2712 etc
60 - mediatek,u3p-dis-msk : mask to disable u3ports, bit0 for u3port0,
61 bit1 for u3port1, ... etc;
62
63additionally the properties from usb-hcd.yaml (in the current directory) are
64supported.
65
66Sub-nodes:
67The xhci should be added as subnode to mtu3 as shown in the following example
68if host mode is enabled. The DT binding details of xhci can be found in:
69Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.txt
70
71The port would be added as subnode if use "usb-role-switch" property.
72 see graph.txt
73
74Example:
75ssusb: usb@11271000 {
76 compatible = "mediatek,mt8173-mtu3";
77 reg = <0 0x11271000 0 0x3000>,
78 <0 0x11280700 0 0x0100>;
79 reg-names = "mac", "ippc";
80 interrupts = <GIC_SPI 64 IRQ_TYPE_LEVEL_LOW>;
81 phys = <&phy_port0 PHY_TYPE_USB3>,
82 <&phy_port1 PHY_TYPE_USB2>;
83 power-domains = <&scpsys MT8173_POWER_DOMAIN_USB>;
84 clocks = <&topckgen CLK_TOP_USB30_SEL>, <&clk26m>,
85 <&pericfg CLK_PERI_USB0>,
86 <&pericfg CLK_PERI_USB1>;
87 clock-names = "sys_ck", "ref_ck";
88 vusb33-supply = <&mt6397_vusb_reg>;
89 vbus-supply = <&usb_p0_vbus>;
90 extcon = <&extcon_usb>;
91 dr_mode = "otg";
92 wakeup-source;
93 mediatek,syscon-wakeup = <&pericfg 0x400 1>;
94 #address-cells = <2>;
95 #size-cells = <2>;
96 ranges;
97
98 usb_host: xhci@11270000 {
99 compatible = "mediatek,mt8173-xhci";
100 reg = <0 0x11270000 0 0x1000>;
101 reg-names = "mac";
102 interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_LOW>;
103 power-domains = <&scpsys MT8173_POWER_DOMAIN_USB>;
104 clocks = <&topckgen CLK_TOP_USB30_SEL>, <&clk26m>;
105 clock-names = "sys_ck", "ref_ck";
106 vusb33-supply = <&mt6397_vusb_reg>;
107 };
108};