linux-kernel - Re: [PATCH 2/2] iio/adc: add documentation for adc ad7927

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Date:   Wed, 16 Nov 2022 19:12:08 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     Edmund Berenson <edmund.berenson@...ix.com>
Cc:     Lukasz Zemla <Lukasz.Zemla@...dward.com>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Michael Hennerich <Michael.Hennerich@...log.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] iio/adc: add documentation for adc ad7927

On Wed, 16 Nov 2022 11:44:53 +0100
Edmund Berenson <edmund.berenson@...ix.com> wrote:

> Add the ad7927 compatibility string documentation to
> ad7923 driver.
> 
> Suggested-by: Lukasz Zemla <Lukasz.Zemla@...dward.com>
> Signed-off-by: Edmund Berenson <edmund.berenson@...ix.com>

Given you treat it as an ad7928 in the driver, can we have
a fallback compatible for it to that part?  Would allow people
using older kernels (with newer DT) to get support without needing
to patch the driver.

> ---
>  Documentation/devicetree/bindings/iio/adc/adi,ad7923.yaml | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7923.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7923.yaml
> index 07f9d1c09c7d..3e9e9a9c18a4 100644
> --- a/Documentation/devicetree/bindings/iio/adc/adi,ad7923.yaml
> +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7923.yaml
> @@ -27,6 +27,7 @@ properties:
>        - adi,ad7924
>        - adi,ad7908
>        - adi,ad7918
> +      - adi,ad7927
>        - adi,ad7928
>  
>    reg: