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| author | Tao Ren <rentao.bupt@gmail.com> | 2020-03-02 22:23:36 -0800 |
|---|---|---|
| committer | Felipe Balbi <balbi@kernel.org> | 2020-03-15 12:12:37 +0200 |
| commit | 4a5dbd9009570d3b23fd1392c4d178bfe3538d2c (patch) | |
| tree | eb23c9c537053ba16dc34ea512fbb9b0c005c36f /Documentation/devicetree/bindings/usb | |
| parent | df8ae98d0b438367b2ba7769180ce891784ddf52 (diff) | |
| download | linux-4a5dbd9009570d3b23fd1392c4d178bfe3538d2c.tar.gz linux-4a5dbd9009570d3b23fd1392c4d178bfe3538d2c.tar.bz2 linux-4a5dbd9009570d3b23fd1392c4d178bfe3538d2c.zip | |
dt-bindings: usb: add documentation for aspeed usb-vhub
Add device tree binding documentation for the Aspeed USB 2.0 Virtual HUb
Controller.
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Tao Ren <rentao.bupt@gmail.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Diffstat (limited to 'Documentation/devicetree/bindings/usb')
| -rw-r--r-- | Documentation/devicetree/bindings/usb/aspeed,usb-vhub.yaml | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/usb/aspeed,usb-vhub.yaml b/Documentation/devicetree/bindings/usb/aspeed,usb-vhub.yaml new file mode 100644 index 000000000000..06399ba0d9e4 --- /dev/null +++ b/Documentation/devicetree/bindings/usb/aspeed,usb-vhub.yaml @@ -0,0 +1,77 @@ +# 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 + allOf: + - $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 + allOf: + - $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>; + }; |