linux-kernel - RE: [PATCH 0/2] mtd: atmel_nand: remove compatible "atmel,sama5d4-nfc"

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Date:	Tue, 10 May 2016 04:50:37 +0000
From:	"Yang, Wenyou" <Wenyou.Yang@...el.com>
To:	Rob Herring <robh@...nel.org>
CC:	Brian Norris <computersforpeace@...il.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Brown <broonie@...nel.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	"Kumar Gala" <galak@...eaurora.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"Ferre, Nicolas" <Nicolas.FERRE@...el.com>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	"Jean-Christophe Plagniol-Villard" <plagnioj@...osoft.com>,
	Russell King <linux@....linux.org.uk>,
	Josh Wu <rainyfeeling@...look.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: RE: [PATCH 0/2] mtd: atmel_nand: remove compatible
 "atmel,sama5d4-nfc"



> -----Original Message-----
> From: Rob Herring [mailto:robh@...nel.org]
> Sent: 2016年5月10日 4:13
> To: Yang, Wenyou <Wenyou.Yang@...el.com>
> Cc: Brian Norris <computersforpeace@...il.com>; David Woodhouse
> <dwmw2@...radead.org>; Pawel Moll <pawel.moll@....com>; Mark Brown
> <broonie@...nel.org>; Ian Campbell <ijc+devicetree@...lion.org.uk>; Kumar
> Gala <galak@...eaurora.org>; linux-kernel@...r.kernel.org; linux-
> mtd@...ts.infradead.org; devicetree@...r.kernel.org; Ferre, Nicolas
> <Nicolas.FERRE@...el.com>; Alexandre Belloni <alexandre.belloni@...e-
> electrons.com>; Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>;
> Russell King <linux@....linux.org.uk>; Josh Wu <rainyfeeling@...look.com>;
> linux-arm-kernel@...ts.infradead.org
> Subject: Re: [PATCH 0/2] mtd: atmel_nand: remove compatible "atmel,sama5d4-
> nfc"
> 
> On Mon, May 09, 2016 at 02:51:17PM +0800, Wenyou Yang wrote:
> > It is a datasheet bug, for current SoCs, the RB_EDGE3(i.e. bit 27) of
> > HSMC_SR register does not exist, the RB_EDGE0 (i.e. bit 24) is the
> > ready/busy line edge status bit. So the compatible "atmel,sama5d4-nfc"
> > is unneeded.
> 
> The compatible is needed if the SOC still exists. You can list both for the sama5d4
> if the block is the same.

The NFC IP of SAMA5D4 is same as SAMA5D2's, SAMA5D4 hase this issue.  This compatible can be removed. 


Best Regards,
Wenyou Yang