linux-kernel - Re: [PATCH v8 1/9] dt-bindings: media: sun6i-a31-csi: Add optional interconnect properties

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Message-ID: <20250709-misty-coot-of-fantasy-cfadfa@houat>
Date: Wed, 9 Jul 2025 09:26:23 +0200
From: Maxime Ripard <mripard@...nel.org>
To: Paul Kocialkowski <paulk@...-base.io>
Cc: linux-media@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev, linux-kernel@...r.kernel.org, 
	linux-clk@...r.kernel.org, Yong Deng <yong.deng@...ewell.com>, 
	Mauro Carvalho Chehab <mchehab@...nel.org>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, Chen-Yu Tsai <wens@...e.org>, 
	Jernej Skrabec <jernej.skrabec@...il.com>, Samuel Holland <samuel@...lland.org>, 
	Michael Turquette <mturquette@...libre.com>, Stephen Boyd <sboyd@...nel.org>
Subject: Re: [PATCH v8 1/9] dt-bindings: media: sun6i-a31-csi: Add optional
 interconnect properties

Hi,

On Fri, Jul 04, 2025 at 05:46:18PM +0200, Paul Kocialkowski wrote:
> An interconnect can be attached to the sun6i-a31-csi device, which is
> useful to attach the dma memory offset. Add related properties.
> 
> Signed-off-by: Paul Kocialkowski <paulk@...-base.io>
> ---
>  .../devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml  | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml b/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml
> index 1aa5775ba2bc..978ef2dc0ae7 100644
> --- a/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml
> +++ b/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml
> @@ -40,6 +40,12 @@ properties:
>    resets:
>      maxItems: 1
>  
> +  interconnects:
> +    maxItems: 1
> +
> +  interconnect-names:
> +    const: dma-mem
> +

Is it really optional? My experience (despite being a bit outdated by
now) was that it was required for some SoCs, and missing for others.

Maxime

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