# # YAFFS file system configurations # config YAFFS_FS tristate "YAFFS2 file system support" default n 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 . 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_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.