From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from zmc.proxad.net ([212.27.53.206]) by casper.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1S9wKD-00087n-Tb for linux-mtd@lists.infradead.org; Tue, 20 Mar 2012 10:29:59 +0000 Message-ID: <4F685BE4.4080209@freebox.fr> Date: Tue, 20 Mar 2012 11:28:52 +0100 From: Florian Fainelli MIME-Version: 1.0 To: Matthieu CASTET Subject: Re: [PATCH] support ONFI multi lun NAND References: <1332167725-7792-1-git-send-email-matthieu.castet@parrot.com> In-Reply-To: <1332167725-7792-1-git-send-email-matthieu.castet@parrot.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Cc: linux-mtd@lists.infradead.org List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Le 03/19/12 15:35, Matthieu CASTET a écrit : > With onfi a flash is organized into one or more logical units (LUNs). > A logical unit (LUN) is the minimum unit that can independently execute > commands and report status. > > Mtd does not exploit LUN, so make it see a big single flash where size is > lun_size * number_of_lun. > > Without this patch MT29F8G08ADBDAH4 size is 512MB instead of 1GB. > > Signed-off-by: Matthieu Castet Acked-by: Florian Fainelli > --- > drivers/mtd/nand/nand_base.c | 3 ++- > 1 files changed, 2 insertions(+), 1 deletions(-) > > diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c > index 8a393f9..04c1baf 100644 > --- a/drivers/mtd/nand/nand_base.c > +++ b/drivers/mtd/nand/nand_base.c > @@ -2898,7 +2898,8 @@ static int nand_flash_detect_onfi(struct mtd_info *mtd, struct nand_chip *chip, > mtd->writesize = le32_to_cpu(p->byte_per_page); > mtd->erasesize = le32_to_cpu(p->pages_per_block) * mtd->writesize; > mtd->oobsize = le16_to_cpu(p->spare_bytes_per_page); > - chip->chipsize = (uint64_t)le32_to_cpu(p->blocks_per_lun) * mtd->erasesize; > + chip->chipsize = (uint64_t)le32_to_cpu(p->blocks_per_lun) * mtd->erasesize > + * p->lun_count; > *busw = 0; > if (le16_to_cpu(p->features)& 1) > *busw = NAND_BUSWIDTH_16;