linux-kernel - Re: [PATCH] dt-bindings: iio: adc: Add TI TWL603X GPADC

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Message-ID: <426d78d6-9fa6-bfeb-b36a-fba264097a27@linaro.org>
Date:   Sat, 19 Aug 2023 20:35:27 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Andreas Kemnade <andreas@...nade.info>, jic23@...nel.org,
        lars@...afoo.de, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org
Subject: Re: [PATCH] dt-bindings: iio: adc: Add TI TWL603X GPADC

On 16/08/2023 22:26, Andreas Kemnade wrote:
> Document TI TWL603X GPADC devicetree bindings.
> A driver is already there, the compatibles are used, but not documented.
> Use two separate files to reference only the allowed compatible in
> a future YAML version of
> Documentation/devicetree/bindings/mfd/twl-family.txt
> 
> Signed-off-by: Andreas Kemnade <andreas@...nade.info>
> ---

Thank you for your patch. There is something to discuss/improve.


>  .../bindings/iio/adc/ti,twl6030-gpadc.yaml    | 42 +++++++++++++++++++
>  .../bindings/iio/adc/ti,twl6032-gpadc.yaml    | 42 +++++++++++++++++++
>  2 files changed, 84 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/iio/adc/ti,twl6030-gpadc.yaml
>  create mode 100644 Documentation/devicetree/bindings/iio/adc/ti,twl6032-gpadc.yaml
> 
> diff --git a/Documentation/devicetree/bindings/iio/adc/ti,twl6030-gpadc.yaml b/Documentation/devicetree/bindings/iio/adc/ti,twl6030-gpadc.yaml
> new file mode 100644
> index 000000000000..08bc0468f616
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/adc/ti,twl6030-gpadc.yaml
> @@ -0,0 +1,42 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/iio/adc/ti,twl6030-gpadc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: GPADC subsystem in the TWL6030 power module
> +
> +maintainers:
> +  - Jonathan Cameron <jic23@...nel.org>

This should be rather someone knowing or having or caring about this
particular hardware, not subsystem maintainer.

> +
> +description:
> +  The GPADC subsystem in the TWL6030 consists of a 10-bit ADC
> +  combined with a 15-input analog multiplexer.
> +
> +properties:
> +  compatible:
> +    const: ti,twl6030-gpadc

Devices look fairly similar. Same properties. Why aren't they in one
binding (enum here instead)?

Best regards,
Krzysztof