linux-kernel - Re: [PATCH 06/11] dt-bindings: usb: Document Renesas RZ/G3E USB3HOST

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Message-ID: <20250822162043.GA3920949-robh@kernel.org>
Date: Fri, 22 Aug 2025 11:20:43 -0500
From: Rob Herring <robh@...nel.org>
To: Biju <biju.das.au@...il.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Magnus Damm <magnus.damm@...il.com>,
	Biju Das <biju.das.jz@...renesas.com>, linux-usb@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org,
	Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [PATCH 06/11] dt-bindings: usb: Document Renesas RZ/G3E USB3HOST

On Wed, Aug 20, 2025 at 06:17:53PM +0100, Biju wrote:
> From: Biju Das <biju.das.jz@...renesas.com>
> 
> Document the Renesas RZ/G3E USB3.2 Gen2 Host Controller (a.k.a USB3HOST).
> The USB3HOST is compliant with the Universal Serial Bus 3.2 Specification
> Revision 1.0.
>  - Supports 1 downstream USB receptacles
>      - Number of SSP Gen2 or SS ports: 1
>      - Number of HS or FS or LS ports: 1
>  - Supports Super Speed Plus Gen2x1 (10 Gbps), Super Speed (5 Gbps),
>    High Speed (480 Mbps), Full Speed (12Mbps), and Low Speed (1.5 Mbps).
>  - Supports all transfer-types: Control, Bulk, Interrupt, Isochronous, and
>    these split-transactions.
>  - Supports Power Control and Over Current Detection.
> 
> Signed-off-by: Biju Das <biju.das.jz@...renesas.com>
> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> ---
>  .../bindings/usb/renesas,rzg3e-xhci.yaml      | 84 +++++++++++++++++++
>  1 file changed, 84 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/usb/renesas,rzg3e-xhci.yaml
> 
> diff --git a/Documentation/devicetree/bindings/usb/renesas,rzg3e-xhci.yaml b/Documentation/devicetree/bindings/usb/renesas,rzg3e-xhci.yaml
> new file mode 100644
> index 000000000000..2f73ea2e1e78
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/usb/renesas,rzg3e-xhci.yaml
> @@ -0,0 +1,84 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/usb/renesas,rzg3e-xhci.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Renesas RZ/G3E USB 3.2 Gen2 Host controller
> +
> +maintainers:
> +  - Biju Das <biju.das.jz@...renesas.com>
> +

Common USB and XHCI properties don't apply?

> +properties:
> +  compatible:
> +    const: renesas,r9a09g047-xhci
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    items:
> +      - description: Logical OR of all interrupt signals.
> +      - description: System management interrupt
> +      - description: Host system error interrupt
> +      - description: Power management event interrupt
> +      - description: xHC interrupt
> +
> +  interrupt-names:
> +    items:
> +      - const: all
> +      - const: smi
> +      - const: hse
> +      - const: pme
> +      - const: xhc
> +
> +  clocks:
> +    maxItems: 1
> +
> +  phys:
> +    maxItems: 2
> +
> +  phy-names:
> +    items:
> +      - const: usb2-phy
> +      - const: usb3-phy
> +
> +  power-domains:
> +    maxItems: 1
> +
> +  resets:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - interrupt-names
> +  - clocks
> +  - power-domains
> +  - resets
> +  - phys
> +  - phy-names
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/renesas,r9a09g047-cpg.h>
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +    usb@...50000 {
> +      compatible = "renesas,r9a09g047-xhci";
> +      reg = <0x15850000 0x10000>;
> +      interrupts = <GIC_SPI 759 IRQ_TYPE_LEVEL_HIGH>,
> +                   <GIC_SPI 758 IRQ_TYPE_LEVEL_HIGH>,
> +                   <GIC_SPI 757 IRQ_TYPE_LEVEL_HIGH>,
> +                   <GIC_SPI 756 IRQ_TYPE_LEVEL_HIGH>,
> +                   <GIC_SPI 755 IRQ_TYPE_LEVEL_HIGH>;
> +      interrupt-names = "all", "smi", "hse", "pme", "xhc";
> +      clocks = <&cpg CPG_MOD 0xaf>;
> +      power-domains = <&cpg>;
> +      resets = <&cpg 0xaa>;
> +      phys = <&usb3_phy>, <&usb3_phy>;
> +      phy-names = "usb2-phy", "usb3-phy";
> +    };
> -- 
> 2.43.0
>