[PATCH 2/3] mtd: add dataflash support

[Jean-Christophe PLAGNIOL-VILLARD]

On 09:08 Mon 15 Oct     , Sascha Hauer wrote:
> 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 <plagnioj at jcrosoft.com>
> > ---
> >  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?
 the DATAFLASH_OTP need the MTD to have the OTP support

 which we do not have yet

 do I did not add it

Best Regards,
J.