linux-kernel - RE: [PATCH linux-next 0/5] mtd: spi-nor: add driver for Atmel QSPI controller

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Message-ID: <A765B125120D1346A63912DDE6D8B6310BF53450@NTXXIAMBX02.xacn.micron.com>
Date:	Tue, 8 Dec 2015 06:44:41 +0000
From:	Bean Huo 霍斌斌 (beanhuo) 
	<beanhuo@...ron.com>
To:	Brian Norris <computersforpeace@...il.com>,
	Cyrille Pitchen <cyrille.pitchen@...el.com>
CC:	"linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
	"nicolas.ferre@...el.com" <nicolas.ferre@...el.com>,
	"marex@...x.de" <marex@...x.de>,
	"vigneshr@...com" <vigneshr@...com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"robh+dt@...nel.org" <robh+dt@...nel.org>,
	"pawel.moll@....com" <pawel.moll@....com>,
	"mark.rutland@....com" <mark.rutland@....com>,
	"ijc+devicetree@...lion.org.uk" <ijc+devicetree@...lion.org.uk>,
	"galak@...eaurora.org" <galak@...eaurora.org>
Subject: RE: [PATCH linux-next 0/5] mtd: spi-nor: add driver for Atmel QSPI
 controller

> 
> I'll admit I'm a little fuzzy on the differences between dual and quad modes on
> various flash manufacturers. Can you help clear it up for me?

For SPI NOR, currently, don't have an official standard to define an uniform Quad
I/O mode protocol. So we can see that there are some difference between Flash
Vendor.