linux-kernel - Re: [PATCH 1/4] dt-bindings: usb: Add Microchip LAN969x support

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Message-ID: <99b0dbae-0014-4d09-8724-092c03393dac@tuxon.dev>
Date: Sat, 6 Dec 2025 13:27:50 +0200
From: Claudiu Beznea <claudiu.beznea@...on.dev>
To: Robert Marko <robert.marko@...tura.hr>, robh@...nel.org,
 krzk+dt@...nel.org, conor+dt@...nel.org, gregkh@...uxfoundation.org,
 nicolas.ferre@...rochip.com, mturquette@...libre.com, sboyd@...nel.org,
 richardcochran@...il.com, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-clk@...r.kernel.org,
 daniel.machon@...rochip.com, UNGLinuxDriver@...rochip.com
Cc: luka.perkov@...tura.hr
Subject: Re: [PATCH 1/4] dt-bindings: usb: Add Microchip LAN969x support

Hi, Robert,

On 12/3/25 14:21, Robert Marko wrote:
> Microchip LAN969x has DWC3 compatible controller, though limited to 2.0(HS)
> speed, so document it.
> 
> Signed-off-by: Robert Marko <robert.marko@...tura.hr>
> ---
>  .../bindings/usb/microchip,lan9691-dwc3.yaml  | 68 +++++++++++++++++++
>  1 file changed, 68 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/usb/microchip,lan9691-dwc3.yaml
> 
> diff --git a/Documentation/devicetree/bindings/usb/microchip,lan9691-dwc3.yaml b/Documentation/devicetree/bindings/usb/microchip,lan9691-dwc3.yaml
> new file mode 100644
> index 000000000000..7ffcbbd1e0f4
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/usb/microchip,lan9691-dwc3.yaml
> @@ -0,0 +1,68 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/usb/microchip,lan9691-dwc3.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Microchip LAN969x SuperSpeed DWC3 USB SoC controller
> +
> +maintainers:
> +  - Robert Marko <robert.marko@...tura.hr>
> +
> +select:
> +  properties:
> +    compatible:
> +      contains:
> +        enum:
> +          - microchip,lan9691-dwc3
> +  required:
> +    - compatible
> +
> +properties:
> +  compatible:
> +    items:
> +      - enum:
> +          - microchip,lan9691-dwc3
> +      - const: snps,dwc3
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    items:
> +      - description: Gated USB DRD clock
> +      - description: Controller reference clock
> +
> +  clock-names:
> +    items:
> +      - const: bus_early
> +      - const: ref
> +
> +unevaluatedProperties: false
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clocks
> +  - clock-names
> +
> +allOf:
> +  - $ref: snps,dwc3.yaml#
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/clock/microchip,lan969x.h>
> +
> +    usb@...000 {
> +      compatible = "microchip,lan9691-dwc3", "snps,dwc3";

AFICT, the examples should be indented by 4 spaces.

> +      reg = <0x300000 0x80000>;
> +      interrupts = <GIC_SPI 80 IRQ_TYPE_LEVEL_HIGH>;
> +      clocks = <&clks GCK_GATE_USB_DRD>,
> +               <&clks GCK_ID_USB_REFCLK>;
> +      clock-names = "bus_early", "ref";
> +    };