Re: [PATCH v8 2/7] dt-bindings: adc: axi-adc: update bindings for backend framework

[David Lechner <dlechner@baylibre.com>]

On Fri, Feb 2, 2024 at 9:10 AM Nuno Sa via B4 Relay
<devnull+nuno.sa.analog.com@kernel.org> wrote:
>
> From: Nuno Sa <nuno.sa@analog.com>
>
> 'adi,adc-dev' is now deprecated and must not be used anymore. Hence,
> also remove it from being required.
>
> The reason why it's being deprecated is because the axi-adc CORE is now
> an IIO service provider hardware (IIO backends) for consumers to make use
> of. Before, the logic with 'adi,adc-dev' was the opposite (it was kind
> of consumer referencing other nodes/devices) and that proved to be wrong
> and to not scale.
>
> Now, IIO consumers of this hardware are expected to reference it using the
> io-backends property. Hence, the new '#io-backend-cells' is being added
> so the device is easily identified as a provider.
>
> Reviewed-by: Rob Herring <robh@kernel.org>
> Signed-off-by: Nuno Sa <nuno.sa@analog.com>
> ---
>  Documentation/devicetree/bindings/iio/adc/adi,axi-adc.yaml | 8 +++++---
>  1 file changed, 5 insertions(+), 3 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/iio/adc/adi,axi-adc.yaml b/Documentation/devicetree/bindings/iio/adc/adi,axi-adc.yaml
> index 9996dd93f84b..add10b22dcac 100644
> --- a/Documentation/devicetree/bindings/iio/adc/adi,axi-adc.yaml
> +++ b/Documentation/devicetree/bindings/iio/adc/adi,axi-adc.yaml
> @@ -39,12 +39,15 @@ properties:
>      $ref: /schemas/types.yaml#/definitions/phandle
>      description:
>        A reference to a the actual ADC to which this FPGA ADC interfaces to.
> +    deprecated: true
> +
> +  '#io-backends-cells'

Still missing the : here.

> +    const: 0
>
>  required:
>    - compatible
>    - dmas
>    - reg
> -  - adi,adc-dev
>
>  additionalProperties: false
>
> @@ -55,7 +58,6 @@ examples:
>          reg = <0x44a00000 0x10000>;
>          dmas = <&rx_dma 0>;
>          dma-names = "rx";
> -
> -        adi,adc-dev = <&spi_adc>;
> +        #io-backends-cells = <0>;
>      };
>  ...
>
> --
> 2.43.0
>
>