From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from web14812.mail.yahoo.com ([66.163.172.96]) by pentafluge.infradead.org with smtp (Exim 3.22 #1 (Red Hat Linux)) id 18AmN0-0006O1-00 for ; Sun, 10 Nov 2002 07:18:58 +0000 Message-ID: <20021110074920.4607.qmail@web14812.mail.yahoo.com> Date: Sat, 9 Nov 2002 23:49:20 -0800 (PST) From: Kevin Kaichuan He Subject: Re: Q on MTD support for NOR flash To: "Jörn" Engel Cc: linux-mtd@lists.infradead.org In-Reply-To: <20021109205730.GB16704@wohnheim.fh-wedel.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-mtd-admin@lists.infradead.org Errors-To: linux-mtd-admin@lists.infradead.org List-Help: List-Post: List-Subscribe: , List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: Jorn, Thank you very much ! One Further question is : how do I configure MTD driver to support my NOR flash ? For example, the AMD29LV800 flash has two width: 8bits or 16bits, how do I let the driver know which width of word I choose ? Or can the MTD magically figure out the configuration of my NOR flash ? thanks! Kevin --- Jörn Engel wrote: > On Sat, 9 November 2002 12:36:50 -0800, Kevin Kaichuan He wrote: > > > > We are considering to use NOR flash in a embedded linux > > system. But it seems that NAND flash support was mentioned > > a lot in MTD instead of NOR flash. I'm wondering if there > > is intensive NOR flash support in MTD, specifically if > > AMD's boot sector NOR flash > > > (AM29LV800B,http://www.amd.com/us-en/FlashMemory/ProductInformation/0,,37_1447_1623_1468%5E1532,00.html) > > is supported. > > Yupp. > Nand flash support is not too old and thus is getting a lot more > development now. Nor, in almost all cases, simply works. > > > Also can we partition the AM29LV800B into multiple partitions and > > mount different filesystem on it (e.g. JFFS on RW partiton and Cramfs > > on RO partition) ? > > Yupp. > > > How about the boot sector of NOR flash, is it supported too ? > > Kinda. If you have to access the small fragments seperately, you might > run into problems. But that is usually only done from a bootloader, > not from linux. > For all practical purposes, yupp. > > Jörn > > -- > Fancy algorithms are slow when n is small, and n is usually small. > Fancy algorithms have big constants. Until you know that n is > frequently going to be big, don't get fancy. > -- Rob Pike __________________________________________________ Do you Yahoo!? U2 on LAUNCH - Exclusive greatest hits videos http://launch.yahoo.com/u2