diff options
Diffstat (limited to 'include/linux/mtd/mtd.h')
| -rw-r--r-- | include/linux/mtd/mtd.h | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h index 9536567d041b..e1d2a3d56546 100644 --- a/include/linux/mtd/mtd.h +++ b/include/linux/mtd/mtd.h @@ -110,9 +110,12 @@ struct mtd_info { * information below if they desire */ u_int32_t erasesize; - /* Smallest availlable size for writing to the device. For NAND, - * this is the page size, for some NOR chips, the size of ECC - * covered blocks. + /* Minimal writable flash unit size. In case of NOR flash it is 1 (even + * though individual bits can be cleared), in case of NAND flash it is + * one NAND page (or half, or one-fourths of it), in case of ECC-ed NOR + * it is of ECC block size, etc. It is illegal to have writesize = 0. + * Any driver registering a struct mtd_info must ensure a writesize of + * 1 or larger. */ u_int32_t writesize; |