From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from dell-paw-3.cambridge.redhat.com ([195.224.55.237] helo=passion.cambridge.redhat.com) by pentafluge.infradead.org with esmtp (Exim 3.22 #1 (Red Hat Linux)) id 1764kv-0000Lv-00 for ; Fri, 10 May 2002 08:23:57 +0100 From: David Woodhouse In-Reply-To: <20020510064306.462BF2756@sitemail.everyone.net> References: <20020510064306.462BF2756@sitemail.everyone.net> To: zeusj@firstlinux.net Cc: all in MTD mailinglist Subject: Re: misc question about MTD Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Fri, 10 May 2002 08:23:41 +0100 Message-ID: <6578.1021015421@redhat.com> 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: zeusj@firstlinux.net said: > 1.in cfi_probe_chip(cfi_probe.c), what is an 'alias ' of a flash chip? > is that the same flash chip mapping in different address? Yes. Often, people will connect flash chips without all the address lines being used, so they can swap in larger chips later. Then you get these 'aliases'. > 2.if I send Query command (98h, I mean) twice, would the 'QRY' disappear? Er, I don't know. I don't think so, but if this _is_ required then it could be useful -- currently we have to use a chip-specific command to put chips back in read mode when we do the alias detection. > and if I send it once, can I read the 'QRY' for several times? Yes, you can. -- dwmw2