linux-kernel - Re: [RFC PATCH 2/2] dt: spi: s3c64xx: add compatible to controller-data

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Message-ID: <20150730105233.GO11162@sirena.org.uk>
Date:	Thu, 30 Jul 2015 11:52:33 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Michal Suchanek <hramrach@...il.com>
Cc:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	David Woodhouse <dwmw2@...radead.org>,
	Brian Norris <computersforpeace@...il.com>,
	Kukjin Kim <kgene@...nel.org>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Padmavathi Venna <padma.kvr@...il.com>,
	Boris BREZILLON <boris.brezillon@...e-electrons.com>,
	devicetree <devicetree@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	MTD Maling List <linux-mtd@...ts.infradead.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
	linux-spi <linux-spi@...r.kernel.org>
Subject: Re: [RFC PATCH 2/2] dt: spi: s3c64xx: add compatible to
 controller-data

On Thu, Jul 30, 2015 at 10:24:37AM +0200, Michal Suchanek wrote:

> So my suggestion is to

> 1) search of ofpart subnode in mtd node. If present read address and
> reg from it and search partitions as subnodes of the ofpart node. In
> this case unknown nodes can cause error.

> 2) failing that issue a warning and try to parse ofpart partitions
> from the mtd node itself. In this case unknown nodes cannot cause
> error for compatibility with other drivers including the already
> exisitn s3c64xx controller-data node.

> The parser code can be the same for both cases and only operate on
> different node with a flag to reject unknown subnodes or not.

That seems reasonable to me.

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