1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/usb/usb-device.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: Generic USB Device 8 9maintainers: 10 - Greg Kroah-Hartman <gregkh@linuxfoundation.org> 11 12description: | 13 Usually, we only use device tree for hard wired USB device. 14 The reference binding doc is from: 15 http://www.devicetree.org/open-firmware/bindings/usb/usb-1_0.ps 16 17 Four types of device-tree nodes are defined: "host-controller nodes" 18 representing USB host controllers, "device nodes" representing USB devices, 19 "interface nodes" representing USB interfaces and "combined nodes" 20 representing simple USB devices. 21 22 A combined node shall be used instead of a device node and an interface node 23 for devices of class 0 or 9 (hub) with a single configuration and a single 24 interface. 25 26 A "hub node" is a combined node or an interface node that represents a USB 27 hub. 28 29properties: 30 compatible: 31 pattern: "^usb[0-9a-f]{1,4},[0-9a-f]{1,4}$" 32 description: Device nodes or combined nodes. 33 "usbVID,PID", where VID is the vendor id and PID the product id. 34 The textual representation of VID and PID shall be in lower case 35 hexadecimal with leading zeroes suppressed. The other compatible 36 strings from the above standard binding could also be used, 37 but a device adhering to this binding may leave out all except 38 for "usbVID,PID". 39 40 reg: 41 description: the number of the USB hub port or the USB host-controller 42 port to which this device is attached. The range is 1-255. 43 maxItems: 1 44 45 "#address-cells": 46 description: should be 1 for hub nodes with device nodes, 47 should be 2 for device nodes with interface nodes. 48 enum: [1, 2] 49 50 "#size-cells": 51 const: 0 52 53patternProperties: 54 "^interface@[0-9a-f]{1,2}(,[0-9a-f]{1,2})$": 55 type: object 56 description: USB interface nodes. 57 The configuration component is not included in the textual 58 representation of an interface-node unit address for configuration 1. 59 60 properties: 61 compatible: 62 pattern: "^usbif[0-9a-f]{1,4},[0-9a-f]{1,4}.config[0-9a-f]{1,2}.[0-9a-f]{1,2}$" 63 description: Interface nodes. 64 "usbifVID,PID.configCN.IN", where VID is the vendor id, PID is 65 the product id, CN is the configuration value and IN is the interface 66 number. The textual representation of VID, PID, CN and IN shall be 67 in lower case hexadecimal with leading zeroes suppressed. 68 The other compatible strings from the above standard binding could 69 also be used, but a device adhering to this binding may leave out 70 all except for "usbifVID,PID.configCN.IN". 71 72 reg: 73 description: should be 2 cells long, the first cell represents 74 the interface number and the second cell represents the 75 configuration value. 76 maxItems: 1 77 78required: 79 - compatible 80 - reg 81 82additionalProperties: true 83 84examples: 85 # hub connected to port 1 86 # device connected to port 2 87 # device connected to port 3 88 # interface 0 of configuration 1 89 # interface 0 of configuration 2 90 - | 91 usb@11270000 { 92 reg = <0x11270000 0x1000>; 93 interrupts = <0x0 0x4e 0x0>; 94 #address-cells = <1>; 95 #size-cells = <0>; 96 97 hub@1 { 98 compatible = "usb5e3,608"; 99 reg = <1>; 100 }; 101 102 device@2 { 103 compatible = "usb123,4567"; 104 reg = <2>; 105 }; 106 107 device@3 { 108 compatible = "usb123,abcd"; 109 reg = <3>; 110 111 #address-cells = <2>; 112 #size-cells = <0>; 113 114 interface@0 { 115 compatible = "usbif123,abcd.config1.0"; 116 reg = <0 1>; 117 }; 118 119 interface@0,2 { 120 compatible = "usbif123,abcd.config2.0"; 121 reg = <0 2>; 122 }; 123 }; 124 }; 125