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Message-ID: <20240626-handbrake-mustang-38c2aab3f04b@spud>
Date: Wed, 26 Jun 2024 12:34:39 +0100
From: Conor Dooley <conor@...nel.org>
To: Marcelo Schmitt <marcelo.schmitt@...log.com>
Cc: broonie@...nel.org, lars@...afoo.de, Michael.Hennerich@...log.com,
	jic23@...nel.org, robh+dt@...nel.org,
	krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
	nuno.sa@...log.com, dlechner@...libre.com, corbet@....net,
	marcelo.schmitt1@...il.com, linux-iio@...r.kernel.org,
	devicetree@...r.kernel.org, linux-spi@...r.kernel.org,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 5/7] dt-bindings: iio: adc: Add AD4000

On Tue, Jun 25, 2024 at 06:55:03PM -0300, Marcelo Schmitt wrote:
> Add device tree documentation for AD4000 series of ADC devices.
> 
> Signed-off-by: Marcelo Schmitt <marcelo.schmitt@...log.com>
> ---
>  .../bindings/iio/adc/adi,ad4000.yaml          | 190 ++++++++++++++++++
>  MAINTAINERS                                   |   7 +
>  2 files changed, 197 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad4000.yaml
> 
> diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad4000.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad4000.yaml
> new file mode 100644
> index 000000000000..76035dff5474
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad4000.yaml
> @@ -0,0 +1,190 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/iio/adc/adi,ad4000.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Analog Devices AD4000 and similar Analog to Digital Converters
> +
> +maintainers:
> +  - Marcelo Schmitt <marcelo.schmitt@...log.com>
> +
> +description: |
> +  Analog Devices AD4000 family of Analog to Digital Converters with SPI support.
> +  Specifications can be found at:
> +    https://www.analog.com/media/en/technical-documentation/data-sheets/ad4000-4004-4008.pdf
> +    https://www.analog.com/media/en/technical-documentation/data-sheets/ad4001-4005.pdf
> +    https://www.analog.com/media/en/technical-documentation/data-sheets/ad4002-4006-4010.pdf
> +    https://www.analog.com/media/en/technical-documentation/data-sheets/ad4003-4007-4011.pdf
> +    https://www.analog.com/media/en/technical-documentation/data-sheets/ad4020-4021-4022.pdf
> +    https://www.analog.com/media/en/technical-documentation/data-sheets/adaq4001.pdf
> +    https://www.analog.com/media/en/technical-documentation/data-sheets/adaq4003.pdf
> +
> +$ref: /schemas/spi/spi-peripheral-props.yaml#
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - const: adi,ad4000
> +      - items:
> +          - enum:
> +              - adi,ad4004
> +              - adi,ad4008
> +          - const: adi,ad4000

> +      - const: adi,ad4001
> +      - items:
> +          - enum:
> +              - adi,ad4005
> +          - const: adi,ad4001

> +      - const: adi,ad4002
> +      - items:
> +          - enum:
> +              - adi,ad4006
> +              - adi,ad4010
> +          - const: adi,ad4002

> +      - const: adi,ad4003
> +      - items:
> +          - enum:
> +              - adi,ad4007
> +              - adi,ad4011
> +          - const: adi,ad4003

> +      - const: adi,ad4020
> +      - items:
> +          - enum:
> +              - adi,ad4021
> +              - adi,ad4022
> +          - const: adi,ad4020

> +      - const: adi,adaq4001

> +      - const: adi,adaq4003

I think some blank lines, maybe like the above, would go a long way with
this list of compatibles.

> +
> +  reg:
> +    maxItems: 1
> +
> +  spi-max-frequency:
> +    maximum: 102040816 # for VIO > 2.7 V, 81300813 for VIO > 1.7 V
> +
> +  adi,sdi-pin:
> +    $ref: /schemas/types.yaml#/definitions/string
> +    enum: [ high, low, cs ]

    enum: [ high, low, cs, sdi ]
    default: sdi

I'd do this, so that the default is documented in the binding, not in
the description text.

Otherwise, this looks good to me.

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