tjh.dev
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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 "dam_ck";
20 - phys : see usb-hcd.txt 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 - vbus-supply : reference to the VBUS regulator, needed when supports
32 dual-role mode.
33 - pinctrl-names : a pinctrl state named "default" is optional, and need be
34 defined if auto drd switch is enabled, that means the property dr_mode
35 is set as "otg", and meanwhile the property "mediatek,enable-manual-drd"
36 is not set.
37 - pinctrl-0 : pin control group
38 See: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
39
40 - maximum-speed : valid arguments are "super-speed", "high-speed" and
41 "full-speed"; refer to usb/generic.txt
42 - enable-manual-drd : supports manual dual-role switch via debugfs; usually
43 used when receptacle is TYPE-A and also wants to support dual-role
44 mode.
45 - wakeup-source: enable USB remote wakeup of host mode.
46 - mediatek,syscon-wakeup : phandle to syscon used to access the register
47 of the USB wakeup glue layer between SSUSB and SPM; it depends on
48 "wakeup-source", and has two arguments:
49 - the first one : register base address of the glue layer in syscon;
50 - the second one : hardware version of the glue layer
51 - 1 : used by mt8173 etc
52 - 2 : used by mt2712 etc
53 - mediatek,u3p-dis-msk : mask to disable u3ports, bit0 for u3port0,
54 bit1 for u3port1, ... etc;
55
56additionally the properties from usb-hcd.txt (in the current directory) are
57supported.
58
59Sub-nodes:
60The xhci should be added as subnode to mtu3 as shown in the following example
61if host mode is enabled. The DT binding details of xhci can be found in:
62Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.txt
63
64Example:
65ssusb: usb@11271000 {
66 compatible = "mediatek,mt8173-mtu3";
67 reg = <0 0x11271000 0 0x3000>,
68 <0 0x11280700 0 0x0100>;
69 reg-names = "mac", "ippc";
70 interrupts = <GIC_SPI 64 IRQ_TYPE_LEVEL_LOW>;
71 phys = <&phy_port0 PHY_TYPE_USB3>,
72 <&phy_port1 PHY_TYPE_USB2>;
73 power-domains = <&scpsys MT8173_POWER_DOMAIN_USB>;
74 clocks = <&topckgen CLK_TOP_USB30_SEL>, <&clk26m>,
75 <&pericfg CLK_PERI_USB0>,
76 <&pericfg CLK_PERI_USB1>;
77 clock-names = "sys_ck", "ref_ck";
78 vusb33-supply = <&mt6397_vusb_reg>;
79 vbus-supply = <&usb_p0_vbus>;
80 extcon = <&extcon_usb>;
81 dr_mode = "otg";
82 wakeup-source;
83 mediatek,syscon-wakeup = <&pericfg 0x400 1>;
84 #address-cells = <2>;
85 #size-cells = <2>;
86 ranges;
87
88 usb_host: xhci@11270000 {
89 compatible = "mediatek,mt8173-xhci";
90 reg = <0 0x11270000 0 0x1000>;
91 reg-names = "mac";
92 interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_LOW>;
93 power-domains = <&scpsys MT8173_POWER_DOMAIN_USB>;
94 clocks = <&topckgen CLK_TOP_USB30_SEL>, <&clk26m>;
95 clock-names = "sys_ck", "ref_ck";
96 vusb33-supply = <&mt6397_vusb_reg>;
97 };
98};