From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <5237BB01.3080700@freescale.com> Date: Tue, 17 Sep 2013 10:14:25 +0800 From: Huang Shijie MIME-Version: 1.0 To: Mark Brown Subject: Re: [PATCH v3 0/8] Add the Quadspi driver for vf610-twr References: <1378979431.2627.402.camel@shinybook.infradead.org> <20130913025827.GA3051@gmail.com> <1378999322.4210.95.camel@i7.infradead.org> <20130913041208.GD3051@gmail.com> <20130912205644.GW29403@sirena.org.uk> <52329AD3.2050608@freescale.com> <20130913102127.GD29403@sirena.org.uk> <52366F97.5030402@freescale.com> <20130916101912.GY29403@sirena.org.uk> <5236DD17.5090203@freescale.com> <20130916110634.GC29403@sirena.org.uk> In-Reply-To: <20130916110634.GC29403@sirena.org.uk> Content-Type: text/plain; charset="GB2312" Content-Transfer-Encoding: quoted-printable Cc: "devicetree@vger.kernel.org" , "computersforpeace@gmail.com" , "b44548@freescale.com" , "dedekind1@gmail.com" , Huang Shijie , "linux-doc@vger.kernel.org" , "b18965@freescale.com" , "linux-spi@vger.kernel.org" , "thomas.langer@lantiq.com" , "linux-mtd@lists.infradead.org" , "Gupta, Pekon" , "kernel@pengutronix.de" , "lznuaa@gmail.com" , "shawn.guo@linaro.org" , David Woodhouse , "linux-arm-kernel@lists.infradead.org" List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , =D3=DA 2013=C4=EA09=D4=C216=C8=D5 19:06, Mark Brown =D0=B4=B5=C0: > I don't know what you mean by "the dummy". Please see the datasheet of the NOR: www.spansion.com/Support/Datasheets/S25FL128S_256S_00.pdf Please see the page 100, the Quad I/O Read, the figure 10.37 shows the dummy. The dummy is just a delay in a command sequence. The dummy maybe only several clock cycles, less then 8 bit. thanks Huang Shijie