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SubjectRe: [PATCH v4 7/7] dt-bindings: usb: add documentation for aspeed usb-vhub
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On Wed, 2020-02-26 at 15:03 -0800, rentao.bupt@gmail.com wrote:
> From: Tao Ren <rentao.bupt@gmail.com>
>
> Add device tree binding documentation for aspeed usb-vhub driver.
>
> Signed-off-by: Tao Ren <rentao.bupt@gmail.com>
> ---
> No change in v2/v3/v4:
> - the patch is added to the patch series since v4.
>
> .../bindings/usb/aspeed,usb-vhub.yaml | 71 +++++++++++++++++++
> 1 file changed, 71 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/usb/aspeed,usb-vhub.yaml
>
> 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..6ebae46641e5
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/usb/aspeed,usb-vhub.yaml
> @@ -0,0 +1,71 @@
> +# SPDX-License-Identifier: GPL-2.0-or-later
> +# 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:
> + - Felipe Balbi <balbi@kernel.org>

Actually I mantain that one, so make this Benjamin Herrenschmidt <
benh@kernel.crashing.org>. Felipe is the overall maintainer of the USB
gadget subsystem afaik.

> +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
> + description: Common configuration registers
> +
> + clocks:
> + maxItems: 1
> + description: The Virtual Hub Controller clock gate
> +
> + interrupts:
> + maxItems: 1
> +
> + aspeed,vhub-downstream-ports:
> + description: Number of downstream ports supported by the Virtual Hub
> + allOf:
> + - $ref: /schemas/types.yaml#/definitions/uint32
> +
> + aspeed,vhub-generic-endpoints:
> + description: Number of generic endpoints supported by the Virtual Hub
> + allOf:
> + - $ref: /schemas/types.yaml#/definitions/uint32
> +
> +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>;
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_usb2ad_default>;
> + };

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