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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
# Copyright (c) 2020 Facebook Inc.
%YAML 1.2
---
$id: http://devicetree.org/schemas/usb/aspeed,usb-vhub.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: ASPEED USB 2.0 Virtual Hub Controller
maintainers:
- Benjamin Herrenschmidt <benh@kernel.crashing.org>
description: |+
The ASPEED USB 2.0 Virtual Hub Controller implements 1 set of USB Hub
register and several sets of Device and Endpoint registers to support
the Virtual Hub's downstream USB devices.
Supported number of devices and endpoints vary depending on hardware
revisions. AST2400 and AST2500 Virtual Hub supports 5 downstream devices
and 15 generic endpoints, while AST2600 Virtual Hub supports 7 downstream
devices and 21 generic endpoints.
properties:
compatible:
enum:
- aspeed,ast2400-usb-vhub
- aspeed,ast2500-usb-vhub
- aspeed,ast2600-usb-vhub
reg:
maxItems: 1
clocks:
maxItems: 1
interrupts:
maxItems: 1
aspeed,vhub-downstream-ports:
description: Number of downstream ports supported by the Virtual Hub
$ref: /schemas/types.yaml#/definitions/uint32
default: 5
minimum: 1
maximum: 7
aspeed,vhub-generic-endpoints:
description: Number of generic endpoints supported by the Virtual Hub
$ref: /schemas/types.yaml#/definitions/uint32
default: 15
minimum: 1
maximum: 21
required:
- compatible
- reg
- clocks
- interrupts
- aspeed,vhub-downstream-ports
- aspeed,vhub-generic-endpoints
additionalProperties: false
examples:
- |
#include <dt-bindings/clock/aspeed-clock.h>
vhub: usb-vhub@1e6a0000 {
compatible = "aspeed,ast2500-usb-vhub";
reg = <0x1e6a0000 0x300>;
interrupts = <5>;
clocks = <&syscon ASPEED_CLK_GATE_USBPORT1CLK>;
aspeed,vhub-downstream-ports = <5>;
aspeed,vhub-generic-endpoints = <15>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_usb2ad_default>;
};
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