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

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Date:   Thu, 10 Nov 2022 12:46:42 +0100
From:   Herve Codina <herve.codina@...tlin.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     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>,
        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

Hi Krzysztof,

On Mon, 7 Nov 2022 19:24:01 +0100
Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org> wrote:

> 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.

Will be fixed in the v2 series.

> 
> > +$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?

No new compatible planned right now. So, oneOf will be removed
in the v2 series.

> 
> > +      - 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

Will be fixed in the v2 series

> 
> > +  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.

Will be fixed in the v2 series

> 
> 
> > +            <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
> 

Thanks for the review,
Hervé

-- 
Hervé Codina, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com