linux-kernel - Re: [PATCH v5 4/6] dt-bindings: iio: adc: ad7192: Add clock provider

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Date: Tue, 18 Jun 2024 16:04:31 +0100
From: Conor Dooley <conor@...nel.org>
To: Alisa-Dariana Roman <alisadariana@...il.com>
Cc: Alisa-Dariana Roman <alisa.roman@...log.com>,
	Jonathan Cameron <Jonathan.Cameron@...wei.com>,
	Michael Hennerich <michael.hennerich@...log.com>,
	linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, Lars-Peter Clausen <lars@...afoo.de>,
	Jonathan Cameron <jic23@...nel.org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>
Subject: Re: [PATCH v5 4/6] dt-bindings: iio: adc: ad7192: Add clock provider

On Tue, Jun 18, 2024 at 05:21:36PM +0300, Alisa-Dariana Roman wrote:
> Internal clock of AD719X devices can be made available on MCLK2 pin. Add
> clock provider to support this functionality.
> 
> Modify second example to showcase this mode.
> 
> Signed-off-by: Alisa-Dariana Roman <alisa.roman@...log.com>
> ---
>  .../devicetree/bindings/iio/adc/adi,ad7192.yaml          | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7192.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7192.yaml
> index 67384bed4cd3..e31436484372 100644
> --- a/Documentation/devicetree/bindings/iio/adc/adi,ad7192.yaml
> +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7192.yaml
> @@ -42,13 +42,17 @@ properties:
>      description:
>        Optionally, either a crystal can be attached externally between MCLK1 and
>        MCLK2 pins, or an external CMOS-compatible clock can drive the MCLK2
> -      pin. If absent, internal 4.92MHz clock is used.
> +      pin. If absent, internal 4.92MHz clock is used, which can be made
> +      available on MCLK2 pin.
>  
>    clock-names:
>      enum:
>        - xtal
>        - mclk
>  
> +  "#clock-cells":
> +    const: 0
> +
>    interrupts:
>      maxItems: 1
>  
> @@ -204,8 +208,7 @@ examples:
>              spi-max-frequency = <1000000>;
>              spi-cpol;
>              spi-cpha;
> -            clocks = <&ad7192_mclk>;
> -            clock-names = "mclk";
> +            #clock-cells = <0>;

I don't see why the example needs to change here.
If these are mutually exclusive, I think the binding should enforce that
if clock-cells is present that clock-names cannot contain "mclk".

>              interrupts = <25 0x2>;
>              interrupt-parent = <&gpio>;
>              aincom-supply = <&aincom>;
> -- 
> 2.34.1
> 

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