Messages in this thread Patch in this message | ![/](/images/icornerl.gif) | | From | Boris Brezillon <> | Subject | [PATCH 1/3] mtd: nand: add NAND_NEED_SCRAMBLING option flag | Date | Thu, 15 Oct 2015 19:17:21 +0200 |
| |
Some MLC NANDs are sensible to repeated patterns and require data to be scrambled in order to limit the number of bitflips. Add a new flag to let the NAND controller know about this constraint.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> --- include/linux/mtd/nand.h | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index 5a9d1d4..19b4c6f 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -160,6 +160,12 @@ typedef enum { /* Device supports subpage reads */ #define NAND_SUBPAGE_READ 0x00001000 +/* + * Some MLC NANDs need data scrambling to limit bitflips caused by repeated + * patterns. + */ +#define NAND_NEED_SCRAMBLING 0x00002000 + /* Options valid for Samsung large page devices */ #define NAND_SAMSUNG_LP_OPTIONS NAND_CACHEPRG -- 2.1.4
| ![\](/images/icornerr.gif) |