[PATCH 2/3] mtd: add dataflash support

[Sascha Hauer]

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?

Sascha

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