talos-op-linux/include/linux/mtd/nand_bch.h, branch v3.3Talos™ II Linux sources for OpenPOWERhttps://git.raptorcs.com/git/talos-op-linux/atom?h=v3.32011-03-11T17:49:08+00:00mtd: nand: add software BCH ECC support2011-03-11T17:49:08+00:00Ivan Djelicivan.djelic@parrot.com2011-03-11T10:05:33+00:00urn:sha1:193bd40026443835e1b96c79d5efe559d01509ae
This patch adds software BCH ECC support to mtd, in order to handle recent
NAND device ecc requirements (4 bits or more).
It does so by adding a new ecc mode (NAND_ECC_SOFT_BCH) for use by board
drivers, and a new Kconfig option to enable BCH support. It relies on the
generic BCH library introduced in a previous patch.
When a board driver uses mode NAND_ECC_SOFT_BCH, it should also set fields
chip->ecc.size and chip->ecc.bytes to select BCH ecc data size and required
error correction capability. See nand_bch_init() documentation for details.
It has been tested on the following platforms using mtd-utils, UBI and
UBIFS: x86 (with nandsim), arm926ejs.
Signed-off-by: Ivan Djelic <ivan.djelic@parrot.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>