linux-kernel - Re: [PATCH v2 17/22] media: dt-bindings: ti,ds90ub960: Add ti,enable-sscg property

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Message-ID: <20250127-neon-sandy-perch-5291e7@krzk-bin>
Date: Mon, 27 Jan 2025 08:37:32 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>, 
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org, Devarsh Thakkar <devarsht@...com>, 
	Jai Luthra <jai.luthra@...asonboard.com>, Sakari Ailus <sakari.ailus@...ux.intel.com>, 
	devicetree@...r.kernel.org, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>
Subject: Re: [PATCH v2 17/22] media: dt-bindings: ti,ds90ub960: Add
 ti,enable-sscg property

On Fri, Jan 24, 2025 at 05:17:54PM +0200, Tomi Valkeinen wrote:
> From: Jai Luthra <jai.luthra@...asonboard.com>
> 
> Spread-spectrum clock generation is supported by UB9702, but only
> optionally required depending upon the hardware. Add a device-tree

What does "optionally required" mean? Either it is required or it is
optional.

> property for enabling SSCG.
> 
> Signed-off-by: Jai Luthra <jai.luthra@...asonboard.com>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
> ---
> Cc: devicetree@...r.kernel.org
> Cc: Rob Herring <robh@...nel.org>
> Cc: Krzysztof Kozlowski <krzk+dt@...nel.org>
> Cc: Conor Dooley <conor+dt@...nel.org>
> ---
>  Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml b/Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml
> index 0b71e6f911a8..970f0f36449a 100644
> --- a/Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml
> +++ b/Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml
> @@ -43,6 +43,11 @@ properties:
>      minItems: 1
>      maxItems: 32
>  
> +  ti,enable-sscg:
> +    type: boolean
> +    description:
> +      Enable Spread-Spectrum Clock Generator for the BC clock for all ports.

And the SSC values are not configurable?

I don't want three bindings for the same (see IMX8, STM32 and pull
request in dtschema), so be sure all your cases fit Dario's and Peng's
work.

Best regards,
Krzysztof