menuconfig MTD

  	tristate "Memory Technology Device (MTD) support"

  	depends on HAS_IOMEM

  	help
  	  Memory Technology Devices are flash, RAM and similar chips, often
  	  used for solid state file systems on embedded devices. This option
  	  will provide the generic support for MTD drivers to register
  	  themselves with the kernel and for potential users of MTD devices
  	  to enumerate the devices which are present and obtain a handle on

  	  them. It will also allow you to select individual drivers for

  	  particular hardware and users of MTD devices. If unsure, say N.

  if MTD

  config MTD_DEBUG
  	bool "Debugging"

  	help
  	  This turns on low-level debugging for the entire MTD sub-system.
  	  Normally, you should say 'N'.
  
  config MTD_DEBUG_VERBOSE
  	int "Debugging verbosity (0 = quiet, 3 = noisy)"
  	depends on MTD_DEBUG
  	default "0"
  	help
  	  Determines the verbosity level of the MTD debugging messages.

  config MTD_TESTS
  	tristate "MTD tests support"
  	depends on m
  	help
  	  This option includes various MTD tests into compilation. The tests
  	  should normally be compiled as kernel modules. The modules perform
  	  various checks and verifications when loaded.

  config MTD_REDBOOT_PARTS
  	tristate "RedBoot partition table parsing"

  	---help---
  	  RedBoot is a ROM monitor and bootloader which deals with multiple
  	  'images' in flash devices by putting a table one of the erase
  	  blocks on the device, similar to a partition table, which gives
  	  the offsets, lengths and names of all the images stored in the
  	  flash.
  
  	  If you need code which can detect and parse this table, and register
  	  MTD 'partitions' corresponding to each image in the table, enable

  	  this option.

  
  	  You will still need the parsing functions to be called by the driver

  	  for your particular device. It won't happen automatically. The
  	  SA1100 map driver (CONFIG_MTD_SA1100) has an option for this, for

  	  example.

  if MTD_REDBOOT_PARTS

  config MTD_REDBOOT_DIRECTORY_BLOCK
  	int "Location of RedBoot partition table"

  	default "-1"
  	---help---
  	  This option is the Linux counterpart to the
  	  CYGNUM_REDBOOT_FIS_DIRECTORY_BLOCK RedBoot compile time
  	  option.
  
  	  The option specifies which Flash sectors holds the RedBoot

  	  partition table.  A zero or positive value gives an absolute

  	  erase block number. A negative value specifies a number of
  	  sectors before the end of the device.

  	  For example "2" means block number 2, "-1" means the last
  	  block and "-2" means the penultimate block.

  config MTD_REDBOOT_PARTS_UNALLOCATED

  	bool "Include unallocated flash regions"

  	help
  	  If you need to register each unallocated flash region as a MTD
  	  'partition', enable this option.
  
  config MTD_REDBOOT_PARTS_READONLY

  	bool "Force read-only for RedBoot system images"

  	help
  	  If you need to force read-only for 'RedBoot', 'RedBoot Config' and
  	  'FIS directory' images, enable this option.

  endif # MTD_REDBOOT_PARTS

  config MTD_CMDLINE_PARTS
  	bool "Command line partition table parsing"

  	depends on MTD = "y"

  	---help---

  	  Allow generic configuration of the MTD partition tables via the kernel

  	  command line. Multiple flash resources are supported for hardware where

  	  different kinds of flash memory are available.

  
  	  You will still need the parsing functions to be called by the driver

  	  for your particular device. It won't happen automatically. The
  	  SA1100 map driver (CONFIG_MTD_SA1100) has an option for this, for

  	  example.
  
  	  The format for the command line is as follows:
  
  	  mtdparts=<mtddef>[;<mtddef]
  	  <mtddef>  := <mtd-id>:<partdef>[,<partdef>]
  	  <partdef> := <size>[@offset][<name>][ro]
  	  <mtd-id>  := unique id used in mapping driver/device

  	  <size>    := standard linux memsize OR "-" to denote all

  	  remaining space
  	  <name>    := (NAME)

  	  Due to the way Linux handles the command line, no spaces are
  	  allowed in the partition definition, including mtd id's and partition

  	  names.
  
  	  Examples:
  
  	  1 flash resource (mtd-id "sa1100"), with 1 single writable partition:
  	  mtdparts=sa1100:-
  
  	  Same flash, but 2 named partitions, the first one being read-only:
  	  mtdparts=sa1100:256k(ARMboot)ro,-(root)
  
  	  If unsure, say 'N'.
  
  config MTD_AFS_PARTS
  	tristate "ARM Firmware Suite partition parsing"

  	depends on ARM

  	---help---
  	  The ARM Firmware Suite allows the user to divide flash devices into
  	  multiple 'images'. Each such image has a header containing its name
  	  and offset/size etc.
  
  	  If you need code which can detect and parse these tables, and
  	  register MTD 'partitions' corresponding to each image detected,
  	  enable this option.
  
  	  You will still need the parsing functions to be called by the driver
  	  for your particular device. It won't happen automatically. The

  	  'physmap' map driver (CONFIG_MTD_PHYSMAP) does this, for example.

  config MTD_OF_PARTS

  	def_bool y
  	depends on OF

  	help
  	  This provides a partition parsing function which derives
  	  the partition map from the children of the flash node,
  	  as described in Documentation/powerpc/booting-without-of.txt.

  config MTD_AR7_PARTS
  	tristate "TI AR7 partitioning support"

  	---help---
  	  TI AR7 partitioning support

  comment "User Modules And Translation Layers"

  
  config MTD_CHAR
  	tristate "Direct char device access to MTD devices"

  	help
  	  This provides a character device for each MTD device present in
  	  the system, allowing the user to read and write directly to the
  	  memory chips, and also use ioctl() to obtain information about
  	  the device, or to erase parts of it.

  config HAVE_MTD_OTP
  	bool
  	help
  	  Enable access to OTP regions using MTD_CHAR.

  config MTD_BLKDEVS
  	tristate "Common interface to block layer for MTD 'translation layers'"

  	depends on BLOCK

  	default n

  config MTD_BLOCK
  	tristate "Caching block device access to MTD devices"

  	depends on BLOCK

  	select MTD_BLKDEVS

  	---help---
  	  Although most flash chips have an erase size too large to be useful
  	  as block devices, it is possible to use MTD devices which are based
  	  on RAM chips in this manner. This block device is a user of MTD
  	  devices performing that function.
  
  	  At the moment, it is also required for the Journalling Flash File
  	  System(s) to obtain a handle on the MTD device when it's mounted
  	  (although JFFS and JFFS2 don't actually use any of the functionality
  	  of the mtdblock device).
  
  	  Later, it may be extended to perform read/erase/modify/write cycles
  	  on flash chips to emulate a smaller block size. Needless to say,
  	  this is very unsafe, but could be useful for file systems which are
  	  almost never written to.
  
  	  You do not need this option for use with the DiskOnChip devices. For
  	  those, enable NFTL support (CONFIG_NFTL) instead.
  
  config MTD_BLOCK_RO
  	tristate "Readonly block device access to MTD devices"

  	depends on MTD_BLOCK!=y && BLOCK

  	select MTD_BLKDEVS

  	help
  	  This allows you to mount read-only file systems (such as cramfs)
  	  from an MTD device, without the overhead (and danger) of the caching
  	  driver.
  
  	  You do not need this option for use with the DiskOnChip devices. For
  	  those, enable NFTL support (CONFIG_NFTL) instead.
  
  config FTL
  	tristate "FTL (Flash Translation Layer) support"

  	depends on BLOCK

  	select MTD_BLKDEVS

  	---help---
  	  This provides support for the original Flash Translation Layer which
  	  is part of the PCMCIA specification. It uses a kind of pseudo-
  	  file system on a flash device to emulate a block device with
  	  512-byte sectors, on top of which you put a 'normal' file system.
  
  	  You may find that the algorithms used in this code are patented
  	  unless you live in the Free World where software patents aren't
  	  legal - in the USA you are only permitted to use this on PCMCIA
  	  hardware, although under the terms of the GPL you're obviously
  	  permitted to copy, modify and distribute the code as you wish. Just
  	  not use it.
  
  config NFTL
  	tristate "NFTL (NAND Flash Translation Layer) support"

  	depends on BLOCK

  	select MTD_BLKDEVS

  	---help---
  	  This provides support for the NAND Flash Translation Layer which is
  	  used on M-Systems' DiskOnChip devices. It uses a kind of pseudo-
  	  file system on a flash device to emulate a block device with
  	  512-byte sectors, on top of which you put a 'normal' file system.
  
  	  You may find that the algorithms used in this code are patented
  	  unless you live in the Free World where software patents aren't
  	  legal - in the USA you are only permitted to use this on DiskOnChip
  	  hardware, although under the terms of the GPL you're obviously
  	  permitted to copy, modify and distribute the code as you wish. Just
  	  not use it.
  
  config NFTL_RW
  	bool "Write support for NFTL"
  	depends on NFTL
  	help
  	  Support for writing to the NAND Flash Translation Layer, as used
  	  on the DiskOnChip.
  
  config INFTL
  	tristate "INFTL (Inverse NAND Flash Translation Layer) support"

  	depends on BLOCK

  	select MTD_BLKDEVS

  	---help---

  	  This provides support for the Inverse NAND Flash Translation

  	  Layer which is used on M-Systems' newer DiskOnChip devices. It
  	  uses a kind of pseudo-file system on a flash device to emulate
  	  a block device with 512-byte sectors, on top of which you put
  	  a 'normal' file system.
  
  	  You may find that the algorithms used in this code are patented
  	  unless you live in the Free World where software patents aren't
  	  legal - in the USA you are only permitted to use this on DiskOnChip
  	  hardware, although under the terms of the GPL you're obviously
  	  permitted to copy, modify and distribute the code as you wish. Just
  	  not use it.

  config RFD_FTL
          tristate "Resident Flash Disk (Flash Translation Layer) support"

  	depends on BLOCK

  	select MTD_BLKDEVS

  	---help---

  	  This provides support for the flash translation layer known
  	  as the Resident Flash Disk (RFD), as used by the Embedded BIOS

  	  of General Software. There is a blurb at:
  
  		http://www.gensw.com/pages/prod/bios/rfd.htm

  config SSFDC

  	tristate "NAND SSFDC (SmartMedia) read only translation layer"

  	depends on BLOCK

  	select MTD_BLKDEVS

  	help
  	  This enables read only access to SmartMedia formatted NAND
  	  flash. You can mount it with FAT file system.

  
  config SM_FTL
  	tristate "SmartMedia/xD new translation layer"

  	depends on EXPERIMENTAL && BLOCK

  	select MTD_BLKDEVS

  	select MTD_NAND_ECC

  	help

  	  This enables EXPERIMENTAL R/W support for SmartMedia/xD

  	  FTL (Flash translation layer).

  	  Write support is only lightly tested, therefore this driver
  	  isn't recommended to use with valuable data (anyway if you have
  	  valuable data, do backups regardless of software/hardware you
  	  use, because you never know what will eat your data...)
  	  If you only need R/O access, you can use older R/O driver
  	  (CONFIG_SSFDC)

  config MTD_OOPS
  	tristate "Log panic/oops to an MTD buffer"

  	help
  	  This enables panic and oops messages to be logged to a circular
  	  buffer in a flash partition where it can be read back at some
  	  later point.

  	  To use, add console=ttyMTDx to the kernel command line,
  	  where x is the MTD device number to use.

  config MTD_SWAP
  	tristate "Swap on MTD device support"
  	depends on MTD && SWAP
  	select MTD_BLKDEVS
  	help
  	  Provides volatile block device driver on top of mtd partition
            suitable for swapping.  The mapping of written blocks is not saved.
  	  The driver provides wear leveling by storing erase counter into the
  	  OOB.

  source "drivers/mtd/chips/Kconfig"
  
  source "drivers/mtd/maps/Kconfig"
  
  source "drivers/mtd/devices/Kconfig"
  
  source "drivers/mtd/nand/Kconfig"

  source "drivers/mtd/onenand/Kconfig"

  source "drivers/mtd/lpddr/Kconfig"

  source "drivers/mtd/ubi/Kconfig"

  endif # MTD