linux-kernel - Re: [PATCH v3 1/3] dt-bindings: usb: dwc3: add support for SpacemiT K1

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Message-ID: <20250519-busy-expert-buffalo-2c01ea@kuoka>
Date: Mon, 19 May 2025 11:35:28 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Ze Huang <huangze@...t.edu.cn>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
	Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
	Conor Dooley <conor+dt@...nel.org>, Yixun Lan <dlan@...too.org>, 
	Thinh Nguyen <Thinh.Nguyen@...opsys.com>, Philipp Zabel <p.zabel@...gutronix.de>, 
	Paul Walmsley <paul.walmsley@...ive.com>, Palmer Dabbelt <palmer@...belt.com>, 
	Albert Ou <aou@...s.berkeley.edu>, Alexandre Ghiti <alex@...ti.fr>, linux-usb@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-riscv@...ts.infradead.org, spacemit@...ts.linux.dev, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/3] dt-bindings: usb: dwc3: add support for SpacemiT
 K1

On Sun, May 18, 2025 at 03:19:19AM GMT, Ze Huang wrote:
> +properties:
> +  compatible:
> +    const: spacemit,k1-dwc3
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  clock-names:
> +    const: usbdrd30
> +

How many phys?

> +  resets:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  interconnects:

compatible, reg and then order by name: clocks +names, interconnects +
names, interrupts, resets, vdd-supply.

> +    maxItems: 1
> +    description:
> +      On SpacemiT K1, USB performs DMA through bus other than parent DT node.
> +      The 'interconnects' property explicitly describes this path, ensuring
> +      correct address translation.
> +
> +  interconnect-names:
> +    const: dma-mem
> +
> +  vbus-supply:
> +    description: A phandle to the regulator supplying the VBUS voltage.
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - clock-names
> +  - resets
> +  - interrupts
> +  - interconnects
> +  - interconnect-names
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    usb@...00000 {
> +        compatible = "spacemit,k1-dwc3";
> +        reg = <0xc0a00000 0x10000>;
> +        clocks = <&syscon_apmu 16>;
> +        clock-names = "usbdrd30";
> +        resets = <&syscon_apmu 8>;
> +        interrupt-parent = <&plic>;
> +        interrupts = <125>;
> +        interconnects = <&mbus0>;
> +        interconnect-names = "dma-mem";

Feels like missing port or ports. Are you sure your example is complete?

> +    };
> 
> -- 
> 2.49.0
>