1MT8173 xHCI 2 3The device node for Mediatek SOC USB3.0 host controller 4 5There are two scenarios: the first one only supports xHCI driver; 6the second one supports dual-role mode, and the host is based on xHCI 7driver. Take account of backward compatibility, we divide bindings 8into two parts. 9 101st: only supports xHCI driver 11------------------------------------------------------------------------ 12 13Required properties: 14 - compatible : should be "mediatek,<soc-model>-xhci", "mediatek,mtk-xhci", 15 soc-model is the name of SoC, such as mt8173, mt2712 etc, when using 16 "mediatek,mtk-xhci" compatible string, you need SoC specific ones in 17 addition, one of: 18 - "mediatek,mt8173-xhci" 19 - reg : specifies physical base address and size of the registers 20 - reg-names: should be "mac" for xHCI MAC and "ippc" for IP port control 21 - interrupts : interrupt used by the controller 22 - power-domains : a phandle to USB power domain node to control USB's 23 mtcmos 24 - vusb33-supply : regulator of USB avdd3.3v 25 26 - clocks : a list of phandle + clock-specifier pairs, one for each 27 entry in clock-names 28 - clock-names : must contain 29 "sys_ck": controller clock used by normal mode, 30 the following ones are optional: 31 "ref_ck": reference clock used by low power mode etc, 32 "mcu_ck": mcu_bus clock for register access, 33 "dma_ck": dma_bus clock for data transfer by DMA, 34 "xhci_ck": controller clock 35 36 - phys : see usb-hcd.yaml in the current directory 37 38Optional properties: 39 - wakeup-source : enable USB remote wakeup; 40 - mediatek,syscon-wakeup : phandle to syscon used to access the register 41 of the USB wakeup glue layer between xHCI and SPM; it depends on 42 "wakeup-source", and has two arguments: 43 - the first one : register base address of the glue layer in syscon; 44 - the second one : hardware version of the glue layer 45 - 1 : used by mt8173 etc 46 - 2 : used by mt2712 etc 47 - mediatek,u3p-dis-msk : mask to disable u3ports, bit0 for u3port0, 48 bit1 for u3port1, ... etc; 49 - vbus-supply : reference to the VBUS regulator; 50 - usb3-lpm-capable : supports USB3.0 LPM 51 - pinctrl-names : a pinctrl state named "default" must be defined 52 - pinctrl-0 : pin control group 53 See: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt 54 - imod-interval-ns: default interrupt moderation interval is 5000ns 55 56additionally the properties from usb-hcd.yaml (in the current directory) are 57supported. 58 59Example: 60usb30: usb@11270000 { 61 compatible = "mediatek,mt8173-xhci"; 62 reg = <0 0x11270000 0 0x1000>, 63 <0 0x11280700 0 0x0100>; 64 reg-names = "mac", "ippc"; 65 interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_LOW>; 66 power-domains = <&scpsys MT8173_POWER_DOMAIN_USB>; 67 clocks = <&topckgen CLK_TOP_USB30_SEL>, <&clk26m>, 68 <&pericfg CLK_PERI_USB0>, 69 <&pericfg CLK_PERI_USB1>; 70 clock-names = "sys_ck", "ref_ck"; 71 phys = <&phy_port0 PHY_TYPE_USB3>, 72 <&phy_port1 PHY_TYPE_USB2>; 73 vusb33-supply = <&mt6397_vusb_reg>; 74 vbus-supply = <&usb_p1_vbus>; 75 usb3-lpm-capable; 76 mediatek,syscon-wakeup = <&pericfg 0x400 1>; 77 wakeup-source; 78 imod-interval-ns = <10000>; 79}; 80 812nd: dual-role mode with xHCI driver 82------------------------------------------------------------------------ 83 84In the case, xhci is added as subnode to mtu3. An example and the DT binding 85details of mtu3 can be found in: 86Documentation/devicetree/bindings/usb/mediatek,mtu3.txt 87 88Required properties: 89 - compatible : should be "mediatek,<soc-model>-xhci", "mediatek,mtk-xhci", 90 soc-model is the name of SoC, such as mt8173, mt2712 etc, when using 91 "mediatek,mtk-xhci" compatible string, you need SoC specific ones in 92 addition, one of: 93 - "mediatek,mt8173-xhci" 94 - reg : specifies physical base address and size of the registers 95 - reg-names: should be "mac" for xHCI MAC 96 - interrupts : interrupt used by the host controller 97 - power-domains : a phandle to USB power domain node to control USB's 98 mtcmos 99 - vusb33-supply : regulator of USB avdd3.3v 100 101 - clocks : a list of phandle + clock-specifier pairs, one for each 102 entry in clock-names 103 - clock-names : must contain "sys_ck", and the following ones are optional: 104 "ref_ck", "mcu_ck" and "dma_ck", "xhci_ck" 105 106Optional properties: 107 - vbus-supply : reference to the VBUS regulator; 108 - usb3-lpm-capable : supports USB3.0 LPM 109 110Example: 111usb30: usb@11270000 { 112 compatible = "mediatek,mt8173-xhci"; 113 reg = <0 0x11270000 0 0x1000>; 114 reg-names = "mac"; 115 interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_LOW>; 116 power-domains = <&scpsys MT8173_POWER_DOMAIN_USB>; 117 clocks = <&topckgen CLK_TOP_USB30_SEL>, <&clk26m>; 118 clock-names = "sys_ck", "ref_ck"; 119 vusb33-supply = <&mt6397_vusb_reg>; 120 usb3-lpm-capable; 121}; 122