linux-kernel - Re: [PATCH 0/4] mtd: nand: atmel: Rework DT representation of NFC/NAND

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Date:	Mon, 2 Feb 2015 00:00:13 -0800
From:	Brian Norris <computersforpeace@...il.com>
To:	Boris Brezillon <boris.brezillon@...e-electrons.com>
Cc:	David Woodhouse <dwmw2@...radead.org>,
	linux-mtd@...ts.infradead.org, Josh Wu <josh.wu@...el.com>,
	Nicolas Ferre <nicolas.ferre@...el.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Andrew Victor <linux@...im.org.za>,
	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>, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/4] mtd: nand: atmel: Rework DT representation of
 NFC/NAND

On Thu, Dec 04, 2014 at 11:30:10PM +0100, Boris Brezillon wrote:
> While working on the EBI driver [1] I noticed that the relationship between
> the NFC (NAND Flash Controller) and the NAND chip it is attached to would
> make things harder to represent when moving the NAND node under the EBI bus
> (another useless 'ranges' definition).
> 
> Actually this representation might be even more problematic if one wants
> decide to connect two NAND chips on his sama5 based board, because the NFC
> node is a child of the NAND chip node, and thus can only be attached to a
> single NAND chip.
> 
> To address this problem the current series moves the NFC node outside of
> the NAND chip device which then reference the NFC using the "atmel,nfc"
> property.
> 
> The series does not implement multi-chip support, but at least the new
> representation should make it possible.

I made some comments on the DT binding. I'm not as familiar withi the
hardware details here, so I may be off base. At any rate, the code looks
OK, so if we settle the binding issue OK, then I'd be happy with a
rebased version of this patch set.

Regards,
Brian
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