From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.nokia.com ([131.228.20.170] helo=mgw-ext11.nokia.com) by canuck.infradead.org with esmtps (Exim 4.63 #1 (Red Hat Linux)) id 1I5bBz-000791-Di for linux-mtd@lists.infradead.org; Tue, 03 Jul 2007 01:44:52 -0400 Subject: Re: What is subpage_sft?? From: Artem Bityutskiy To: Vinit Agnihotri In-Reply-To: <9b52d64c0707022228u1d47fa1awfef79a9f6574b0f@mail.gmail.com> References: <9b52d64c0707022228u1d47fa1awfef79a9f6574b0f@mail.gmail.com> Content-Type: text/plain; charset=utf-8 Date: Tue, 03 Jul 2007 08:44:25 +0300 Message-Id: <1183441465.3531.5.camel@sauron> Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Cc: linux-mtd@lists.infradead.org Reply-To: dedekind@infradead.org List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Tue, 2007-07-03 at 10:58 +0530, Vinit Agnihotri wrote: > I tried searching on net to understand what subpage_sft means, but > aint find any relevant information. >=20 > What does subpage_sft means?? Where it is used?? Is it related with > NAND or NOR flash? > Can anybody provide this little information to me. Any relevant > document or link is welcome. Many NANDs are allow to write more then once to the NAND page, and MTD allows you to write a sub-page rather then whole page. Typically 512 bytes NAND page consists of 2x256 byte sub-pages, or 2KiB NAND page consists of 4x512 byte sub-pages. --=20 Best regards, Artem Bityutskiy (=D0=91=D0=B8=D1=82=D1=8E=D1=86=D0=BA=D0=B8=D0=B9 =D0=90= =D1=80=D1=82=D1=91=D0=BC)