linux-kernel - Re: [PATCH 4/7] dt-bindings: usb: add the Renesas USBF controller binding

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Message-ID: <c10df12c-ccb9-03b7-96be-1aac5feee1aa@linaro.org>
Date:   Mon, 7 Nov 2022 19:24:01 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Herve Codina <herve.codina@...tlin.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Magnus Damm <magnus.damm@...il.com>,
        Gareth Williams <gareth.williams.jx@...esas.com>
Cc:     linux-renesas-soc@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>
Subject: Re: [PATCH 4/7] dt-bindings: usb: add the Renesas USBF controller
 binding

On 07/11/2022 14:58, Herve Codina wrote:
> The Renesas USBF controller is an USB2.0 device controller
> (UDC) available in Renesas r9a06g032 SoC (RZ/N1 family).
> 
> Signed-off-by: Herve Codina <herve.codina@...tlin.com>
> ---
>  .../devicetree/bindings/usb/renesas,usbf.yaml | 64 +++++++++++++++++++
>  1 file changed, 64 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/usb/renesas,usbf.yaml
> 
> diff --git a/Documentation/devicetree/bindings/usb/renesas,usbf.yaml b/Documentation/devicetree/bindings/usb/renesas,usbf.yaml
> new file mode 100644
> index 000000000000..f2b146d9d37b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/usb/renesas,usbf.yaml
> @@ -0,0 +1,64 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/usb/renesas,usbf.yaml#

Filename based on compatible, so renesas,rzn1-usbf.yaml.

> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Renesas USBF (USB Function) controller binding
> +
> +description: |
> +   The Renesas USBF controller is an USB2.0 device
> +   controller (UDC).
> +
> +maintainers:
> +  - Herve Codina <herve.codina@...tlin.com>
> +
> +properties:
> +  compatible:
> +    oneOf:

You have only one possibility, so oneOf is not needed. Unless you
already predict it will grow with new incompatible lists?

> +      - items:
> +          - enum:
> +              - renesas,r9a06g032-usbf
> +          - const: renesas,rzn1-usbf
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    items:
> +      - description: Internal bus clock (AHB) for Function
> +      - description: Internal bus clock (AHB) for Power Management

Blank line

> +  clock-names:
> +    items:
> +      - const: hclkf
> +      - const: hclkpm
> +
> +  interrupts:
> +    items:
> +      - description: The USBF EPC interrupt
> +      - description: The USBF AHB-EPC interrupt
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - clock-names
> +  - interrupts
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/clock/r9a06g032-sysctrl.h>
> +
> +    usb@...1e000 {
> +        compatible = "renesas,r9a06g032-usbf", "renesas,rzn1-usbf";
> +        reg = <0x4001e000 0x2000>;
> +        interrupts =

No need for line break. It's not helping in readability.


> +            <GIC_SPI 77 IRQ_TYPE_LEVEL_HIGH>,
> +            <GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>;
> +        clocks = <&sysctrl R9A06G032_HCLK_USBF>,
> +                 <&sysctrl R9A06G032_HCLK_USBPM>;
> +        clock-names = "hclkf", "hclkpm";
> +    };

Best regards,
Krzysztof