diff options
| author | Huang Shijie <b32955@freescale.com> | 2013-05-17 11:17:31 +0800 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2013-08-30 21:34:45 +0100 |
| commit | 2dc0bdd91bb63f7d5755137177315c49637f6a96 (patch) | |
| tree | 0bc0bc8948d4f7d16515d3682316d0ea8914a3ee /include | |
| parent | e2985fc1d684927ce1dd5e5e6d35db8b52302685 (diff) | |
mtd: add ECC info for nand_flash_dev{}
Add an instance of an anonymous struct to store the ECC info for full id
nand chips.
@ecc.strength_ds: ECC correctability from the datasheet.
@ecc.step_ds: ECC size required by the @ecc.strength_ds,
These two fields are all from the datasheet.
Also add the necessary macros to make the code simple and clean.
Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mtd/nand.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index bf4c566f064..ac8e89d5a79 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -628,6 +628,11 @@ struct nand_chip { { .name = (nm), {{ .dev_id = (devid) }}, .chipsize = (chipsz), \ .options = (opts) } +#define NAND_ECC_INFO(_strength, _step) \ + { .strength_ds = (_strength), .step_ds = (_step) } +#define NAND_ECC_STRENGTH(type) ((type)->ecc.strength_ds) +#define NAND_ECC_STEP(type) ((type)->ecc.step_ds) + /** * struct nand_flash_dev - NAND Flash Device ID Structure * @name: a human-readable name of the NAND chip @@ -645,6 +650,12 @@ struct nand_chip { * @options: stores various chip bit options * @id_len: The valid length of the @id. * @oobsize: OOB size + * @ecc.strength_ds: The ECC correctability from the datasheet, same as the + * @ecc_strength_ds in nand_chip{}. + * @ecc.step_ds: The ECC step required by the @ecc.strength_ds, same as the + * @ecc_step_ds in nand_chip{}, also from the datasheet. + * For example, the "4bit ECC for each 512Byte" can be set with + * NAND_ECC_INFO(4, 512). */ struct nand_flash_dev { char *name; @@ -661,6 +672,10 @@ struct nand_flash_dev { unsigned int options; uint16_t id_len; uint16_t oobsize; + struct { + uint16_t strength_ds; + uint16_t step_ds; + } ecc; }; /** |