diff options
author | Mike Dunn <mikedunn@newsguy.com> | 2012-03-11 17:21:11 -0400 |
---|---|---|
committer | David Woodhouse <David.Woodhouse@intel.com> | 2012-03-26 19:56:46 -0400 |
commit | 6a918bade9dab40aaef80559bd1169c69e8d69cb (patch) | |
tree | 1be69789f9b6c6e064a36f4ef6e142a8ec0058b5 /drivers/mtd/nand/jz4740_nand.c | |
parent | 1d0b95b0834087ba3653f69c24483d63a26d51a7 (diff) |
mtd: flash drivers set ecc strength
Flash device drivers initialize 'ecc_strength' in struct mtd_info, which is the
maximum number of bit errors that can be corrected in one writesize region.
Drivers using the nand interface intitialize 'strength' in struct nand_ecc_ctrl,
which is the maximum number of bit errors that can be corrected in one ecc step.
Nand infrastructure code translates this to 'ecc_strength'.
Also for nand drivers, the nand infrastructure code sets ecc.strength for ecc
modes NAND_ECC_SOFT, NAND_ECC_SOFT_BCH, and NAND_ECC_NONE. It is set in the
driver for all other modes.
Signed-off-by: Mike Dunn <mikedunn@newsguy.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd/nand/jz4740_nand.c')
-rw-r--r-- | drivers/mtd/nand/jz4740_nand.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/mtd/nand/jz4740_nand.c b/drivers/mtd/nand/jz4740_nand.c index cc50e35cdc3..e4147e8acb7 100644 --- a/drivers/mtd/nand/jz4740_nand.c +++ b/drivers/mtd/nand/jz4740_nand.c | |||
@@ -332,6 +332,11 @@ static int __devinit jz_nand_probe(struct platform_device *pdev) | |||
332 | chip->ecc.mode = NAND_ECC_HW_OOB_FIRST; | 332 | chip->ecc.mode = NAND_ECC_HW_OOB_FIRST; |
333 | chip->ecc.size = 512; | 333 | chip->ecc.size = 512; |
334 | chip->ecc.bytes = 9; | 334 | chip->ecc.bytes = 9; |
335 | chip->ecc.strength = 2; | ||
336 | /* | ||
337 | * FIXME: ecc_strength value of 2 bits per 512 bytes of data is a | ||
338 | * conservative guess, given 9 ecc bytes and reed-solomon alg. | ||
339 | */ | ||
335 | 340 | ||
336 | if (pdata) | 341 | if (pdata) |
337 | chip->ecc.layout = pdata->ecc_layout; | 342 | chip->ecc.layout = pdata->ecc_layout; |