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#
# YAFFS file system configurations
#
config YAFFS_FS
tristate "YAFFS2 file system support"
default n
depends on MTD
select YAFFS_YAFFS1
select YAFFS_YAFFS2
help
YAFFS2, or Yet Another Flash Filing System, is a filing system
optimised for NAND Flash chips.
To compile the YAFFS2 file system support as a module, choose M here:
the module will be called yaffs2.
If unsure, say N.
Further information on YAFFS2 is available at
<http://www.aleph1.co.uk/yaffs/>.
config YAFFS_YAFFS1
bool "512 byte / page devices"
depends on YAFFS_FS
default y
help
Enable YAFFS1 support -- yaffs for 512 byte / page devices
If unsure, say Y.
config YAFFS_DOES_ECC
bool "Lets Yaffs do its own ECC"
depends on YAFFS_FS && YAFFS_YAFFS1
default n
help
This enables Yaffs to use its own ECC functions instead of using
the ones from the generic MTD-NAND driver.
If unsure, say N.
config YAFFS_ECC_WRONG_ORDER
bool "Use the same ecc byte order as Steven Hill's nand_ecc.c"
depends on YAFFS_FS && YAFFS_DOES_ECC
default n
help
This makes yaffs_ecc.c use the same ecc byte order as
Steven Hill's nand_ecc.c. If not set, then you get the
same ecc byte order as SmartMedia.
If unsure, say N.
config YAFFS_YAFFS2
bool "2048 byte (or larger) / page devices"
depends on YAFFS_FS
default y
help
Enable YAFFS2 support -- yaffs for >= 2048 byte / page larger devices
If unsure, say Y.
config YAFFS_AUTO_YAFFS2
bool "Autoselect yaffs2 format"
depends on YAFFS_YAFFS2
default y
help
Without this, you need to explicitely use yaffs2 as the file
system type. With this, you can say "yaffs" and yaffs or yaffs2
will be used depending on the device page size.
If unsure, say Y.
config YAFFS_DISABLE_LAZY_LOAD
bool "Disable lazy loading"
depends on YAFFS_YAFFS2
default n
help
"Lazy loading" defers loading file details until they are
required. This saves mount time, but makes the first look-up
a bit longer.
Lazy loading will only happen if enabled by this option being 'n'
and if the appropriate tags are available, else yaffs2 will
automatically fall back to immediate loading and do the right
thing.
Lazy laoding will be required by checkpointing.
Setting this to 'y' will disable lazy loading.
If unsure, say N.
config YAFFS_DISABLE_WIDE_TNODES
bool "Turn off wide tnodes"
depends on YAFFS_FS
default n
help
Wide tnodes are only used for large NAND arrays (>=32MB for
512-byte page devices and >=128MB for 2k page devices). They use
slightly more RAM but are faster since they eliminate chunk group
searching.
Setting this to 'y' will force tnode width to 16 bits and make
large arrays slower.
If unsure, say N.
config YAFFS_DISABLE_CHUNK_ERASED_CHECK
bool "Turn off debug chunk erase check"
depends on YAFFS_FS
default y
help
Enabling this turns off the test that chunks are erased in flash
before writing to them. This is safe, since the write verification
will fail. Suggest enabling the test (ie. say N)
during development to help debug things.
If unsure, say Y.
config YAFFS_SHORT_NAMES_IN_RAM
bool "Cache short names in RAM"
depends on YAFFS_FS
default y
help
If this config is set, then short names are stored with the
yaffs_Object. This costs an extra 16 bytes of RAM per object,
but makes look-ups faster.
If unsure, say Y.
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