linux-kernel - Re: [PATCH v2] dt-bindings: usb: Add Socionext Uniphier DWC3 controller

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Message-ID: <2dde6891-a0e3-4e60-a773-302061a8e5a5@socionext.com>
Date: Tue, 6 Jan 2026 13:33:56 +0900
From: Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
To: "Rob Herring (Arm)" <robh@...nel.org>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Masami Hiramatsu <mhiramat@...nel.org>
Cc: linux-usb@...r.kernel.org, devicetree@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] dt-bindings: usb: Add Socionext Uniphier DWC3
 controller

Hi Rob,

On 2026/01/06 1:24, Rob Herring (Arm) wrote:
> The Socionext Uniphier DWC3 controller binding is already in use, but
> undocumented. It's a straight-forward binding similar to other DWC3
> bindings.
> 
> Signed-off-by: Rob Herring (Arm) <robh@...nel.org>
> ---
> v2:
>   - Allow 1 phy entry for Pro4
> ---
>   .../bindings/usb/socionext,uniphier-dwc3.yaml | 89 +++++++++++++++++++
>   1 file changed, 89 insertions(+)
>   create mode 100644
> Documentation/devicetree/bindings/usb/socionext,uniphier-dwc3.yaml
> 
> diff --git
> a/Documentation/devicetree/bindings/usb/socionext,uniphier-dwc3.yaml
> b/Documentation/devicetree/bindings/usb/socionext,uniphier-dwc3.yaml
> new file mode 100644
> index 000000000000..2b253339c199
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/usb/socionext,uniphier-dwc3.yaml
> @@ -0,0 +1,89 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/usb/socionext,uniphier-dwc3.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Socionext Uniphier SuperSpeed DWC3 USB SoC controller
> +
> +maintainers:
> +  - Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
> +  - Masami Hiramatsu <mhiramat@...nel.org>
> +
> +select:
> +  properties:
> +    compatible:
> +      contains:
> +        const: socionext,uniphier-dwc3
> +  required:
> +    - compatible
> +
> +properties:
> +  compatible:
> +    items:
> +      - const: socionext,uniphier-dwc3
> +      - const: snps,dwc3
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    minItems: 1
> +    items:
> +      - description: Host or single combined interrupt
> +      - description: Peripheral interrupt
> +
> +  interrupt-names:
> +    minItems: 1
> +    items:
> +      - enum:
> +          - dwc_usb3
> +          - host
> +      - const: peripheral
> +
> +  clocks:
> +    maxItems: 3
> +
> +  clock-names:
> +    items:
> +      - const: ref
> +      - const: bus_early
> +      - const: suspend
> +
> +  phys:
> +    description: 1 to 4 HighSpeed PHYs followed by 1 or 2 SuperSpeed PHYs
> +    minItems: 1
> +    maxItems: 6
> +
> +  resets:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clocks
> +  - clock-names
> +  - phys
> +
> +unevaluatedProperties: false
> +
> +allOf:
> +  - $ref: snps,dwc3.yaml#
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +    usb@...00000 {
> +        compatible = "socionext,uniphier-dwc3", "snps,dwc3";
> +        reg = <0x65a00000 0xcd00>;
> +        interrupt-names = "dwc_usb3";
> +        interrupts = <GIC_SPI 134 IRQ_TYPE_LEVEL_HIGH>;
> +        clock-names = "ref", "bus_early", "suspend";
> +        clocks = <&sys_clk 12>, <&sys_clk 12>, <&sys_clk 12>;
> +        resets = <&usb0_rst 15>;
> +        phys = <&usb0_hsphy0>, <&usb0_hsphy1>,
> +               <&usb0_ssphy0>, <&usb0_ssphy1>;
> +        dr_mode = "host";
> +    };

I've checked this with ARCH=arm and ARCH=arm64.

Reviewed-by: Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>

Thank you,

---
Best Regards
Kunihiko Hayashi