From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1TNema-00019S-AY for barebox@lists.infradead.org; Mon, 15 Oct 2012 07:08:13 +0000 Date: Mon, 15 Oct 2012 09:08:10 +0200 From: Sascha Hauer Message-ID: <20121015070810.GH27665@pengutronix.de> References: <20121014204622.GT13639@game.jcrosoft.org> <1350247764-18132-1-git-send-email-plagnioj@jcrosoft.com> <1350247764-18132-2-git-send-email-plagnioj@jcrosoft.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1350247764-18132-2-git-send-email-plagnioj@jcrosoft.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: barebox-bounces@lists.infradead.org Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: Re: [PATCH 2/3] mtd: add dataflash support To: Jean-Christophe PLAGNIOL-VILLARD Cc: barebox@lists.infradead.org On Sun, Oct 14, 2012 at 10:49:23PM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote: > from linux 3.6 > > Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD > --- > drivers/mtd/devices/Kconfig | 18 + > drivers/mtd/devices/Makefile | 1 + > drivers/mtd/devices/mtd_dataflash.c | 882 +++++++++++++++++++++++++++++++++++ > include/spi/flash.h | 2 +- > 4 files changed, 902 insertions(+), 1 deletion(-) > create mode 100644 drivers/mtd/devices/mtd_dataflash.c > > diff --git a/drivers/mtd/devices/Kconfig b/drivers/mtd/devices/Kconfig > index e6d747c..e956921 100644 > --- a/drivers/mtd/devices/Kconfig > +++ b/drivers/mtd/devices/Kconfig > @@ -1,6 +1,24 @@ > menu "Self contained MTD devices" > depends on MTD!=n > > +config MTD_DATAFLASH > + tristate "Support for AT45xxx DataFlash" > + depends on SPI > + help > + This enables access to AT45xxx DataFlash chips, using SPI. > + Sometimes DataFlash chips are packaged inside MMC-format > + cards; at this writing, the MMC stack won't handle those. > + > +config MTD_DATAFLASH_WRITE_VERIFY > + bool "Verify DataFlash page writes" > + depends on MTD_DATAFLASH > + help > + This adds an extra check when data is written to the flash. > + It may help if you are verifying chip setup (timings etc) on > + your board. There is a rare possibility that even though the > + device thinks the write was successful, a bit could have been > + flipped accidentally due to device wear or something else. > + What about MTD_DATAFLASH_OTP? Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox