linux-kernel - Re: [PATCH v3 1/1] dt-bindings: net: convert qca,qca7000.txt yaml format

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Message-ID: <aEhPTXHHulIP5MqG@lizhi-Precision-Tower-5810>
Date: Tue, 10 Jun 2025 11:29:17 -0400
From: Frank Li <Frank.li@....com>
To: Krzysztof Kozlowski <krzk@...nel.org>
Cc: Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Stefan Wahren <wahrenst@....net>,
	"open list:NETWORKING DRIVERS" <netdev@...r.kernel.org>,
	"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" <devicetree@...r.kernel.org>,
	open list <linux-kernel@...r.kernel.org>, imx@...ts.linux.dev
Subject: Re: [PATCH v3 1/1] dt-bindings: net: convert qca,qca7000.txt yaml
 format

On Tue, Jun 10, 2025 at 09:24:40AM +0200, Krzysztof Kozlowski wrote:
> On Fri, Jun 06, 2025 at 11:51:17AM GMT, Frank Li wrote:
> > +description: |
> > +  The QCA7000 is a serial-to-powerline bridge with a host interface which could
> > +  be configured either as SPI or UART slave. This configuration is done by
> > +  the QCA7000 firmware.
> > +
> > +  (a) Ethernet over SPI
> > +
> > +  In order to use the QCA7000 as SPI device it must be defined as a child of a
> > +  SPI master in the device tree.
> > +
> > +  (b) Ethernet over UART
> > +
> > +  In order to use the QCA7000 as UART slave it must be defined as a child of a
> > +  UART master in the device tree. It is possible to preconfigure the UART
> > +  settings of the QCA7000 firmware, but it's not possible to change them during
> > +  runtime
> > +
> > +properties:
> > +  compatible:
> > +    const: qca,qca7000
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  interrupts:
> > +    maxItems: 1
> > +
> > +if:
>
> Please put this if: inside allOf: section, so you won't need to
> re-indent it when adding one more if-clause.
>
> > +  required:
> > +    - reg
> > +
> > +then:
> > +  properties:
> > +    spi-cpha: true
> > +
> > +    spi-cpol: true
> > +
> > +    spi-max-frequency:
> > +      default: 8000000
> > +      maximum: 16000000
> > +      minimum: 1000000
> > +
> > +    qca,legacy-mode:
>
> This should be defined in top-level properties and you only do:
> "foo: false" in "else:" part.
>
> > +      $ref: /schemas/types.yaml#/definitions/flag
> > +      description:
> > +        Set the SPI data transfer of the QCA7000 to legacy mode.
> > +        In this mode the SPI master must toggle the chip select
> > +        between each data word. In burst mode these gaps aren't
> > +        necessary, which is faster. This setting depends on how
> > +        the QCA7000 is setup via GPIO pin strapping. If the
> > +        property is missing the driver defaults to burst mode.
> > +
> > +  allOf:
> > +    - $ref: /schemas/spi/spi-peripheral-props.yaml#
>
> This should be part of top-level allOf.
>
> > +
> > +else:
> > +  properties:
> > +    current-speed:
> > +      default: 115200
> > +
> > +  allOf:
> > +    - $ref: /schemas/serial/serial-peripheral-props.yaml#
>
> Same here.

If it is one top, how to disable all properties in serial-peripheral-props.yaml
if it connect to spi (reg exist).

Frank

>
> > +
> > +allOf:
> > +  - $ref: ethernet-controller.yaml#
> > +
> > +unevaluatedProperties: false
> > +
> > +examples:
> > +  - |
> > +    spi {
> > +        #address-cells = <1>;
> > +        #size-cells = <0>;
> > +
> > +        ethernet@0 {
> > +            compatible = "qca,qca7000";
> > +            reg = <0x0>;
> > +            interrupt-parent = <&gpio3>;      /* GPIO Bank 3 */
> > +            interrupts = <25 0x1>;            /* Index: 25, rising edge */
> > +            spi-cpha;                         /* SPI mode: CPHA=1 */
> > +            spi-cpol;                         /* SPI mode: CPOL=1 */
> > +            spi-max-frequency = <8000000>;    /* freq: 8 MHz */
> > +            local-mac-address = [ a0 b0 c0 d0 e0 f0 ];
> > +        };
> > +    };
> > +
> > +  - |
> > +    serial {
> > +        ethernet {
> > +            compatible = "qca,qca7000";
> > +            local-mac-address = [ a0 b0 c0 d0 e0 f0 ];
> > +            current-speed = <38400>;
> > +        };
>
> Best regards,
> Krzysztof
>