| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| 2 | %YAML 1.2 |
| 3 | --- |
| 4 | $id: http://devicetree.org/schemas/usb/microchip,usb5744.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: Microchip USB5744 4-port Hub Controller |
| 8 | |
| 9 | description: |
| 10 | Microchip's USB5744 SmartHubTM IC is a 4 port, SuperSpeed (SS)/Hi-Speed (HS), |
| 11 | low power, low pin count configurable and fully compliant with the USB 3.1 |
| 12 | Gen 1 specification. The USB5744 also supports Full Speed (FS) and Low Speed |
| 13 | (LS) USB signaling, offering complete coverage of all defined USB operating |
| 14 | speeds. The new SuperSpeed hubs operate in parallel with the USB 2.0 |
| 15 | controller, so 5 Gbps SuperSpeed data transfers are not affected by slower |
| 16 | USB 2.0 traffic. |
| 17 | |
| 18 | maintainers: |
| 19 | - Piyush Mehta <piyush.mehta@amd.com> |
| 20 | - Michal Simek <michal.simek@amd.com> |
| 21 | |
| 22 | properties: |
| 23 | compatible: |
| 24 | enum: |
| 25 | - usb424,2744 |
| 26 | - usb424,5744 |
| 27 | - microchip,usb5744 |
| 28 | |
| 29 | reg: |
| 30 | maxItems: 1 |
| 31 | |
| 32 | reset-gpios: |
| 33 | maxItems: 1 |
| 34 | description: |
| 35 | GPIO controlling the GRST# pin. |
| 36 | |
| 37 | vdd-supply: |
| 38 | description: |
| 39 | 3V3 power supply to the hub |
| 40 | |
| 41 | vdd2-supply: |
| 42 | description: |
| 43 | 1V2 power supply to the hub |
| 44 | |
| 45 | peer-hub: |
| 46 | $ref: /schemas/types.yaml#/definitions/phandle |
| 47 | description: |
| 48 | phandle to the peer hub on the controller. |
| 49 | |
| 50 | i2c-bus: |
| 51 | $ref: /schemas/types.yaml#/definitions/phandle |
| 52 | description: |
| 53 | phandle of an usb hub connected via i2c bus. |
| 54 | |
| 55 | required: |
| 56 | - compatible |
| 57 | - reg |
| 58 | |
| 59 | allOf: |
| 60 | - if: |
| 61 | properties: |
| 62 | compatible: |
| 63 | contains: |
| 64 | const: microchip,usb5744 |
| 65 | then: |
| 66 | properties: |
| 67 | reset-gpios: false |
| 68 | vdd-supply: false |
| 69 | vdd2-supply: false |
| 70 | peer-hub: false |
| 71 | i2c-bus: false |
| 72 | else: |
| 73 | $ref: /schemas/usb/usb-device.yaml |
| 74 | required: |
| 75 | - peer-hub |
| 76 | |
| 77 | additionalProperties: false |
| 78 | |
| 79 | examples: |
| 80 | - | |
| 81 | #include <dt-bindings/gpio/gpio.h> |
| 82 | i2c: i2c { |
| 83 | #address-cells = <1>; |
| 84 | #size-cells = <0>; |
| 85 | hub: usb-hub@2d { |
| 86 | compatible = "microchip,usb5744"; |
| 87 | reg = <0x2d>; |
| 88 | }; |
| 89 | }; |
| 90 | |
| 91 | usb { |
| 92 | #address-cells = <1>; |
| 93 | #size-cells = <0>; |
| 94 | |
| 95 | /* 2.0 hub on port 1 */ |
| 96 | hub_2_0: hub@1 { |
| 97 | compatible = "usb424,2744"; |
| 98 | reg = <1>; |
| 99 | peer-hub = <&hub_3_0>; |
| 100 | i2c-bus = <&hub>; |
| 101 | reset-gpios = <&gpio 3 GPIO_ACTIVE_LOW>; |
| 102 | }; |
| 103 | |
| 104 | /* 3.0 hub on port 2 */ |
| 105 | hub_3_0: hub@2 { |
| 106 | compatible = "usb424,5744"; |
| 107 | reg = <2>; |
| 108 | peer-hub = <&hub_2_0>; |
| 109 | i2c-bus = <&hub>; |
| 110 | reset-gpios = <&gpio 3 GPIO_ACTIVE_LOW>; |
| 111 | }; |
| 112 | }; |