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Date:	Fri, 21 Mar 2014 15:37:17 +0200
From:	Tomi Valkeinen <>
To:	Laurent Pinchart <>,
	Grant Likely <>
CC:	Philipp Zabel <>,
	Russell King - ARM Linux <>,
	Mauro Carvalho Chehab <>,
	Rob Herring <>,
	Sylwester Nawrocki <>,
	Kyungmin Park <>,
	<>, <>,
	Guennadi Liakhovetski <>,
	Philipp Zabel <>
Subject: Re: [PATCH v4 1/3] [media] of: move graph helpers from drivers/media/v4l2-core
 to drivers/of

On 21/03/14 00:32, Laurent Pinchart wrote:

> The OF graph bindings documentation could just specify the ports node as 
> optional and mandate individual device bindings to specify it as mandatory or 
> forbidden (possibly with a default behaviour to avoid making all device 
> bindings too verbose).

Isn't it so that if the device has one port, it can always do without
'ports', but if it has multiple ports, it always has to use 'ports' so
that #address-cells and #size-cells can be defined?

If so, there's nothing left for the individual device bindings to decide.


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