drivers/mtd/devices/Kconfig - linux - Git at Google


            
            # SPDX-License-Identifier: GPL-2.0-only

            
            menu "Self-contained MTD device drivers"

            
            	depends on MTD!=n

            
            	depends on HAS_IOMEM


            config MTD_PMC551

            
            	tristate "Ramix PMC551 PCI Mezzanine RAM card support"

            
            	depends on PCI

            
            	help

            
            	  This provides a MTD device driver for the Ramix PMC551 RAM PCI card

            
            	  from Ramix Inc. <http://www.ramix.com/products/memory/pmc551.html>.

            
            	  These devices come in memory configurations from 32M - 1G.  If you

            
            	  have one, you probably want to enable this.


            	  If this driver is compiled as a module you get the ability to select

            
            	  the size of the aperture window pointing into the devices memory.

            
            	  What this means is that if you have a 1G card, normally the kernel

            
            	  will use a 1G memory map as its view of the device.  As a module,

            
            	  you can select a 1M window into the memory and the driver will

            
            	  "slide" the window around the PMC551's memory.  This was

            
            	  particularly useful on the 2.2 kernels on PPC architectures as there

            
            	  was limited kernel space to deal with.


            config MTD_PMC551_BUGFIX

            
            	bool "PMC551 256M DRAM Bugfix"

            
            	depends on MTD_PMC551

            
            	help

            
            	  Some of Ramix's PMC551 boards with 256M configurations have invalid

            
            	  column and row mux values.  This option will fix them, but will

            
            	  break other memory configurations.  If unsure say N.


            config MTD_PMC551_DEBUG

            
            	bool "PMC551 Debugging"

            
            	depends on MTD_PMC551

            
            	help

            
            	  This option makes the PMC551 more verbose during its operation and

            
            	  is only really useful if you are developing on this driver or

            
            	  suspect a possible hardware or driver bug.  If unsure say N.


            config MTD_MS02NV

            
            	tristate "DEC MS02-NV NVRAM module support"

            
            	depends on MACH_DECSTATION

            
            	help

            
            	  This is an MTD driver for the DEC's MS02-NV (54-20948-01) battery

            
            	  backed-up NVRAM module.  The module was originally meant as an NFS

            
            	  accelerator.  Say Y here if you have a DECstation 5000/2x0 or a

            
            	  DECsystem 5900 equipped with such a module.


            	  If you want to compile this driver as a module ( = code which can be

            
            	  inserted in and removed from the running kernel whenever you want),

            
            	  say M here and read <file:Documentation/kbuild/modules.rst>.

            
            	  The module will be called ms02-nv.


            config MTD_DATAFLASH

            
            	tristate "Support for AT45xxx DataFlash"

            
            	depends on SPI_MASTER

            
            	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.


            config MTD_DATAFLASH_OTP

            
            	bool "DataFlash OTP support (Security Register)"

            
            	depends on MTD_DATAFLASH

            
            	help

            
            	  Newer DataFlash chips (revisions C and D) support 128 bytes of

            
            	  one-time-programmable (OTP) data.  The first half may be written

            
            	  (once) with up to 64 bytes of data, such as a serial number or

            
            	  other key product data.  The second half is programmed with a

            
            	  unique-to-each-chip bit pattern at the factory.


            config MTD_M25P80

            
            	tristate "Support most SPI Flash chips (AT26DF, M25P, W25X, ...)"

            
            	depends on SPI_MASTER && MTD_SPI_NOR

            
            	select SPI_MEM

            
            	help

            
            	  This enables access to most modern SPI flash chips, used for

            
            	  program and data storage.   Series supported include Atmel AT26DF,

            
            	  Spansion S25SL, SST 25VF, ST M25P, and Winbond W25X.  Other chips

            
            	  are supported as well.  See the driver source for the current list,

            
            	  or to add other chips.


            	  Note that the original DataFlash chips (AT45 series, not AT26DF),

            
            	  need an entirely different driver.


            	  Set up your spi devices with the right board-specific platform data,

            
            	  if you want to specify device partitioning or to use a device which

            
            	  doesn't support the JEDEC ID instruction.


            config MTD_MCHP23K256

            
            	tristate "Microchip 23K256 SRAM"

            
            	depends on SPI_MASTER

            
            	help

            
            	  This enables access to Microchip 23K256 SRAM chips, using SPI.


            	  Set up your spi devices with the right board-specific

            
            	  platform data, or a device tree description if you want to

            
            	  specify device partitioning


            config MTD_SPEAR_SMI

            
            	tristate "SPEAR MTD NOR Support through SMI controller"

            
            	depends on PLAT_SPEAR

            
            	default y

            
            	help

            
            	  This enable SNOR support on SPEAR platforms using SMI controller


            config MTD_SST25L

            
            	tristate "Support SST25L (non JEDEC) SPI Flash chips"

            
            	depends on SPI_MASTER

            
            	help

            
            	  This enables access to the non JEDEC SST25L SPI flash chips, used

            
            	  for program and data storage.


            	  Set up your spi devices with the right board-specific platform data,

            
            	  if you want to specify device partitioning.


            config MTD_BCM47XXSFLASH

            
            	tristate "Support for serial flash on BCMA bus"

            
            	depends on BCMA_SFLASH && (MIPS || ARM)

            
            	help

            
            	  BCMA bus can have various flash memories attached, they are

            
            	  registered by bcma as platform devices. This enables driver for

            
            	  serial flash memories.


            config MTD_SLRAM

            
            	tristate "Uncached system RAM"

            
            	help

            
            	  If your CPU cannot cache all of the physical memory in your machine,

            
            	  you can still use it for storage or swap by using this driver to

            
            	  present it to the system as a Memory Technology Device.


            config MTD_PHRAM

            
            	tristate "Physical system RAM"

            
            	help

            
            	  This is a re-implementation of the slram driver above.


            	  Use this driver to access physical memory that the kernel proper

            
            	  doesn't have access to, memory beyond the mem=xxx limit, nvram,

            
            	  memory on the video card, etc...


            config MTD_LART

            
            	tristate "28F160xx flash driver for LART"

            
            	depends on SA1100_LART

            
            	help

            
            	  This enables the flash driver for LART. Please note that you do

            
            	  not need any mapping/chip driver for LART. This one does it all

            
            	  for you, so go disable all of those if you enabled some of them (:


            config MTD_MTDRAM

            
            	tristate "Test driver using RAM"

            
            	help

            
            	  This enables a test MTD device driver which uses vmalloc() to

            
            	  provide storage.  You probably want to say 'N' unless you're

            
            	  testing stuff.


            config MTDRAM_TOTAL_SIZE

            
            	int "MTDRAM device size in KiB"

            
            	depends on MTD_MTDRAM

            
            	default "4096"

            
            	help

            
            	  This allows you to configure the total size of the MTD device

            
            	  emulated by the MTDRAM driver.  If the MTDRAM driver is built

            
            	  as a module, it is also possible to specify this as a parameter when

            
            	  loading the module.


            config MTDRAM_ERASE_SIZE

            
            	int "MTDRAM erase block size in KiB"

            
            	depends on MTD_MTDRAM

            
            	default "128"

            
            	help

            
            	  This allows you to configure the size of the erase blocks in the

            
            	  device emulated by the MTDRAM driver.  If the MTDRAM driver is built

            
            	  as a module, it is also possible to specify this as a parameter when

            
            	  loading the module.


            config MTD_BLOCK2MTD

            
            	tristate "MTD using block device"

            
            	depends on BLOCK

            
            	help

            
            	  This driver allows a block device to appear as an MTD. It would

            
            	  generally be used in the following cases:


            	  Using Compact Flash as an MTD, these usually present themselves to

            
            	  the system as an ATA drive.

            
            	  Testing MTD users (eg JFFS2) on large media and media that might

            
            	  be removed during a write (using the floppy drive).


            config MTD_POWERNV_FLASH

            
            	tristate "powernv flash MTD driver"

            
            	depends on PPC_POWERNV

            
            	help

            
            	  This provides an MTD device to access flash on powernv OPAL

            
            	  platforms from Linux. This device abstracts away the

            
            	  firmware interface for flash access.


            comment "Disk-On-Chip Device Drivers"


            config MTD_DOCG3

            
            	tristate "M-Systems Disk-On-Chip G3"

            
            	select BCH

            
            	select BCH_CONST_PARAMS if !MTD_NAND_ECC_SW_BCH

            
            	select BITREVERSE

            
            	help

            
            	  This provides an MTD device driver for the M-Systems DiskOnChip

            
            	  G3 devices.


            	  The driver provides access to G3 DiskOnChip, distributed by

            
            	  M-Systems and now Sandisk. The support is very experimental,

            
            	  and doesn't give access to any write operations.


            config MTD_ST_SPI_FSM

            
            	tristate "ST Microelectronics SPI FSM Serial Flash Controller"

            
            	depends on ARCH_STI

            
            	help

            
            	  This provides an MTD device driver for the ST Microelectronics

            
            	  SPI Fast Sequence Mode (FSM) Serial Flash Controller and support

            
            	  for a subset of connected Serial Flash devices.


            if MTD_DOCG3

            
            config BCH_CONST_M

            
            	default 14

            
            config BCH_CONST_T

            
            	default 4

            
            endif


            endmenu
	# SPDX-License-Identifier: GPL-2.0-only
	menu "Self-contained MTD device drivers"
	depends on MTD!=n
	depends on HAS_IOMEM

	config MTD_PMC551
	tristate "Ramix PMC551 PCI Mezzanine RAM card support"
	depends on PCI
	help
	This provides a MTD device driver for the Ramix PMC551 RAM PCI card
	from Ramix Inc. <http://www.ramix.com/products/memory/pmc551.html>.
	These devices come in memory configurations from 32M - 1G. If you
	have one, you probably want to enable this.

	If this driver is compiled as a module you get the ability to select
	the size of the aperture window pointing into the devices memory.
	What this means is that if you have a 1G card, normally the kernel
	will use a 1G memory map as its view of the device. As a module,
	you can select a 1M window into the memory and the driver will
	"slide" the window around the PMC551's memory. This was
	particularly useful on the 2.2 kernels on PPC architectures as there
	was limited kernel space to deal with.

	config MTD_PMC551_BUGFIX
	bool "PMC551 256M DRAM Bugfix"
	depends on MTD_PMC551
	help
	Some of Ramix's PMC551 boards with 256M configurations have invalid
	column and row mux values. This option will fix them, but will
	break other memory configurations. If unsure say N.

	config MTD_PMC551_DEBUG
	bool "PMC551 Debugging"
	depends on MTD_PMC551
	help
	This option makes the PMC551 more verbose during its operation and
	is only really useful if you are developing on this driver or
	suspect a possible hardware or driver bug. If unsure say N.

	config MTD_MS02NV
	tristate "DEC MS02-NV NVRAM module support"
	depends on MACH_DECSTATION
	help
	This is an MTD driver for the DEC's MS02-NV (54-20948-01) battery
	backed-up NVRAM module. The module was originally meant as an NFS
	accelerator. Say Y here if you have a DECstation 5000/2x0 or a
	DECsystem 5900 equipped with such a module.

	If you want to compile this driver as a module ( = code which can be
	inserted in and removed from the running kernel whenever you want),
	say M here and read <file:Documentation/kbuild/modules.rst>.
	The module will be called ms02-nv.

	config MTD_DATAFLASH
	tristate "Support for AT45xxx DataFlash"
	depends on SPI_MASTER
	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.

	config MTD_DATAFLASH_OTP
	bool "DataFlash OTP support (Security Register)"
	depends on MTD_DATAFLASH
	help
	Newer DataFlash chips (revisions C and D) support 128 bytes of
	one-time-programmable (OTP) data. The first half may be written
	(once) with up to 64 bytes of data, such as a serial number or
	other key product data. The second half is programmed with a
	unique-to-each-chip bit pattern at the factory.

	config MTD_M25P80
	tristate "Support most SPI Flash chips (AT26DF, M25P, W25X, ...)"
	depends on SPI_MASTER && MTD_SPI_NOR
	select SPI_MEM
	help
	This enables access to most modern SPI flash chips, used for
	program and data storage. Series supported include Atmel AT26DF,
	Spansion S25SL, SST 25VF, ST M25P, and Winbond W25X. Other chips
	are supported as well. See the driver source for the current list,
	or to add other chips.

	Note that the original DataFlash chips (AT45 series, not AT26DF),
	need an entirely different driver.

	Set up your spi devices with the right board-specific platform data,
	if you want to specify device partitioning or to use a device which
	doesn't support the JEDEC ID instruction.

	config MTD_MCHP23K256
	tristate "Microchip 23K256 SRAM"
	depends on SPI_MASTER
	help
	This enables access to Microchip 23K256 SRAM chips, using SPI.

	Set up your spi devices with the right board-specific
	platform data, or a device tree description if you want to
	specify device partitioning

	config MTD_SPEAR_SMI
	tristate "SPEAR MTD NOR Support through SMI controller"
	depends on PLAT_SPEAR
	default y
	help
	This enable SNOR support on SPEAR platforms using SMI controller

	config MTD_SST25L
	tristate "Support SST25L (non JEDEC) SPI Flash chips"
	depends on SPI_MASTER
	help
	This enables access to the non JEDEC SST25L SPI flash chips, used
	for program and data storage.

	Set up your spi devices with the right board-specific platform data,
	if you want to specify device partitioning.

	config MTD_BCM47XXSFLASH
	tristate "Support for serial flash on BCMA bus"
	depends on BCMA_SFLASH && (MIPS \|\| ARM)
	help
	BCMA bus can have various flash memories attached, they are
	registered by bcma as platform devices. This enables driver for
	serial flash memories.

	config MTD_SLRAM
	tristate "Uncached system RAM"
	help
	If your CPU cannot cache all of the physical memory in your machine,
	you can still use it for storage or swap by using this driver to
	present it to the system as a Memory Technology Device.

	config MTD_PHRAM
	tristate "Physical system RAM"
	help
	This is a re-implementation of the slram driver above.

	Use this driver to access physical memory that the kernel proper
	doesn't have access to, memory beyond the mem=xxx limit, nvram,
	memory on the video card, etc...

	config MTD_LART
	tristate "28F160xx flash driver for LART"
	depends on SA1100_LART
	help
	This enables the flash driver for LART. Please note that you do
	not need any mapping/chip driver for LART. This one does it all
	for you, so go disable all of those if you enabled some of them (:

	config MTD_MTDRAM
	tristate "Test driver using RAM"
	help
	This enables a test MTD device driver which uses vmalloc() to
	provide storage. You probably want to say 'N' unless you're
	testing stuff.

	config MTDRAM_TOTAL_SIZE
	int "MTDRAM device size in KiB"
	depends on MTD_MTDRAM
	default "4096"
	help
	This allows you to configure the total size of the MTD device
	emulated by the MTDRAM driver. If the MTDRAM driver is built
	as a module, it is also possible to specify this as a parameter when
	loading the module.

	config MTDRAM_ERASE_SIZE
	int "MTDRAM erase block size in KiB"
	depends on MTD_MTDRAM
	default "128"
	help
	This allows you to configure the size of the erase blocks in the
	device emulated by the MTDRAM driver. If the MTDRAM driver is built
	as a module, it is also possible to specify this as a parameter when
	loading the module.

	config MTD_BLOCK2MTD
	tristate "MTD using block device"
	depends on BLOCK
	help
	This driver allows a block device to appear as an MTD. It would
	generally be used in the following cases:

	Using Compact Flash as an MTD, these usually present themselves to
	the system as an ATA drive.
	Testing MTD users (eg JFFS2) on large media and media that might
	be removed during a write (using the floppy drive).

	config MTD_POWERNV_FLASH
	tristate "powernv flash MTD driver"
	depends on PPC_POWERNV
	help
	This provides an MTD device to access flash on powernv OPAL
	platforms from Linux. This device abstracts away the
	firmware interface for flash access.

	comment "Disk-On-Chip Device Drivers"

	config MTD_DOCG3
	tristate "M-Systems Disk-On-Chip G3"
	select BCH
	select BCH_CONST_PARAMS if !MTD_NAND_ECC_SW_BCH
	select BITREVERSE
	help
	This provides an MTD device driver for the M-Systems DiskOnChip
	G3 devices.

	The driver provides access to G3 DiskOnChip, distributed by
	M-Systems and now Sandisk. The support is very experimental,
	and doesn't give access to any write operations.

	config MTD_ST_SPI_FSM
	tristate "ST Microelectronics SPI FSM Serial Flash Controller"
	depends on ARCH_STI
	help
	This provides an MTD device driver for the ST Microelectronics
	SPI Fast Sequence Mode (FSM) Serial Flash Controller and support
	for a subset of connected Serial Flash devices.

	if MTD_DOCG3
	config BCH_CONST_M
	default 14
	config BCH_CONST_T
	default 4
	endif

	endmenu