linux-kernel - Re: [PATCH 3/3] dt-bindings: usb: add documentation for aspeed udc

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Date:   Fri, 13 May 2022 11:07:04 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Neal Liu <neal_liu@...eedtech.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Joel Stanley <joel@....id.au>,
        Andrew Jeffery <andrew@...id.au>,
        Felipe Balbi <balbi@...nel.org>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        Christian König <christian.koenig@....com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Li Yang <leoyang.li@....com>
Cc:     linux-aspeed@...ts.ozlabs.org, linux-usb@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, linaro-mm-sig@...ts.linaro.org,
        BMC-SW@...eedtech.com
Subject: Re: [PATCH 3/3] dt-bindings: usb: add documentation for aspeed udc

On 13/05/2022 08:57, Neal Liu wrote:
> Add device tree binding documentation for the Aspeed USB2.0 Device
> Controller.
> 
> Signed-off-by: Neal Liu <neal_liu@...eedtech.com>
> ---
>  .../devicetree/bindings/usb/aspeed,udc.yaml   | 52 +++++++++++++++++++
>  1 file changed, 52 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/usb/aspeed,udc.yaml

Please name the file as first compatible, so "aspeed,ast2600-udc.yaml"


> 
> diff --git a/Documentation/devicetree/bindings/usb/aspeed,udc.yaml b/Documentation/devicetree/bindings/usb/aspeed,udc.yaml
> new file mode 100644
> index 000000000000..d1d2f77d1c54
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/usb/aspeed,udc.yaml
> @@ -0,0 +1,52 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +# Copyright (c) 2020 Facebook Inc.
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/usb/aspeed,udc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: ASPEED USB 2.0 Device Controller
> +
> +maintainers:
> +  - Neal Liu <neal_liu@...eedtech.com>
> +
> +description: |+
> +  The ASPEED USB 2.0 Device Controller implements 1 control endpoint and
> +  4 generic endpoints for AST260x.
> +
> +  Supports independent DMA channel for each generic endpoint.
> +  Supports 32/256 stages descriptor mode for all generic endpoints.
> +
> +properties:
> +  compatible:
> +    enum:
> +      - aspeed,ast2600-udc
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1

No child properties? No ports or any other devices? No usb-hcd.yaml?
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - interrupts
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/aspeed-clock.h>
> +    udc: udc@...a2000 {

Node name: usb

> +            compatible = "aspeed,ast2600-udc";
> +            reg = <0x1e6a2000 0x300>;
> +            interrupts = <9>;
> +            clocks = <&syscon ASPEED_CLK_GATE_USBPORT2CLK>;
> +            pinctrl-names = "default";
> +            pinctrl-0 = <&pinctrl_usb2bd_default>;
> +    };


Best regards,
Krzysztof