Re: [PATCH 2/3] media: dt-bindings: media: i2c: imx219: document clock-frequency property

[Krzysztof Kozlowski <krzk@kernel.org>]

On Sat, Dec 05, 2020 at 07:33:54PM +0100, michael.srba@seznam.cz wrote:
> From: Michael Srba <Michael.Srba@seznam.cz>
> 
> This patch documents the clock-frequency property, which allows the driver
> to change the clock frequency from it's default value.
> 
> Signed-off-by: Michael Srba <Michael.Srba@seznam.cz>
> ---
>  Documentation/devicetree/bindings/media/i2c/imx219.yaml | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/media/i2c/imx219.yaml b/Documentation/devicetree/bindings/media/i2c/imx219.yaml
> index dfc4d29a4f04..666b8a9da5be 100644
> --- a/Documentation/devicetree/bindings/media/i2c/imx219.yaml
> +++ b/Documentation/devicetree/bindings/media/i2c/imx219.yaml
> @@ -27,6 +27,10 @@ properties:
>    clocks:
>      maxItems: 1
>  
> +  clock-frequency:
> +    description:
> +      Frequency of the input clock in Hertz.
> +
>    VDIG-supply:
>      description:
>        Digital I/O voltage supply, 1.8 volts
> @@ -78,6 +82,7 @@ required:
>    - compatible
>    - reg
>    - clocks
> +  - clock-frequency

Although you can make the field required in bindings, your driver
implementation must support older DTBs.

Best regards,
Krzysztof