Re: [PATCH 1/6] dt-bindings: iio: adc: add ADI ad4030, ad4630 and ad4632

[Krzysztof Kozlowski <krzk@kernel.org>]

On 22/08/2024 14:45, Esteban Blanc wrote:
> This adds a binding specification for the Analog Devices Inc. AD4030,
> AD4630 and AD4632 families of ADCs.
> 
> - ad4030-24 is a 1 channel SAR ADC with 24 bits of precision and a
>   sampling rate of 2M samples per second
> - ad4630-16 is a 2 channels SAR ADC with 16 bits of precision and a
>   sampling rate of 2M samples per second
> - ad4630-24 is a 2 channels SAR ADC with 24 bits of precision and a
>   sampling rate of 2M samples per second
> - ad4632-16 is a 2 channels SAR ADC with 16 bits of precision and a
>   sampling rate of 500K samples per second
> - ad4632-24 is a 2 channels SAR ADC with 24 bits of precision and a
>   sampling rate of 500K samples per second
> 
> Signed-off-by: Esteban Blanc <eblanc@baylibre.com>
> ---
>  .../devicetree/bindings/iio/adc/adi,ad4030.yaml    | 113 +++++++++++++++++++++
>  MAINTAINERS                                        |   8 ++
>  2 files changed, 121 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad4030.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad4030.yaml
> new file mode 100644
> index 000000000000..7957c0c0ac7a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad4030.yaml
> @@ -0,0 +1,113 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +# Copyright 2024 Analog Devices Inc.
> +# Copyright 2024 BayLibre, SAS.
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/iio/adc/adi,ad4030.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Analog Devices AD4030 and AD4630 ADC family device driver

"device driver"? Bindings are for hardware. Explain the hardware, not
driver.

> +
> +maintainers:
> +  - Nuno Sa <nuno.sa@analog.com>
> +  - Michael Hennerich <michael.hennerich@analog.com>
> +
> +description: |
> +  Analog Devices AD4030 single channel and AD4630 dual channel precision SAR ADC
> +  family

Does not look like wrapped according to Linux coding style. Read the
coding style (not checkpatch).

> +
> +  * https://www.analog.com/media/en/technical-documentation/data-sheets/ad4030-24-4032-24.pdf
> +  * https://www.analog.com/media/en/technical-documentation/data-sheets/ad4630-24_ad4632-24.pdf
> +  * https://www.analog.com/media/en/technical-documentation/data-sheets/ad4630-16-4632-16.pdf
> +
> +properties:
> +

Drop blank line

> +  compatible:
> +    enum:
> +      - adi,ad4030-24
> +      - adi,ad4630-16
> +      - adi,ad4630-24
> +      - adi,ad4632-16
> +      - adi,ad4632-24
> +
> +  reg:
> +    maxItems: 1
> +
> +  spi-max-frequency:
> +    maximum: 100000000
> +
> +  spi-rx-bus-width:
> +    enum: [1, 2, 4]
> +
> +  vdd-5v-supply: true
> +  vdd-1v8-supply: true
> +  vio-supply: true
> +
> +  ref-supply:
> +    description:
> +      Optional External unbuffered reference. Used when refin-supply is not
> +      connected.
> +
> +  refin-supply:
> +    description:
> +      Internal buffered Reference. Used when ref-supply is not connected.
> +
> +  cnv-gpio:

Nope, there is no "gpio" property. It IS ALWAYS gpios. Look at other
examples.


> +    description:
> +      The Convert Input (CNV). It initiates the sampling conversions.
> +    maxItems: 1
> +
> +  reset-gpio:

Same problem.

> +    description:
> +      Reset Input (Active Low). Used for asynchronous device reset.
> +    maxItems: 1
> +
> +  interrupts:
> +    description:
> +      The BUSY pin is used to signal that the conversions results are available
> +      to be transferred when in SPI Clocking Mode. This nodes should be connected
> +      to an interrupt that is triggered when the BUSY line goes low.
> +    maxItems: 1
> +


> 

Best regards,
Krzysztof