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| author |   Boris BREZILLON <boris.brezillon@free-electrons.com> | 2015-12-02 12:01:05 +0100 |
|---|---|---|
| committer |   Brian Norris <computersforpeace@gmail.com> | 2016-01-22 16:36:54 -0800 |
| commit | c03d996900f9d063b47ef7462885a9085c8a587f (patch) | |
| tree | d6cc081404a5c39c9bef567940631f2763f8f11b /include/linux/mtd | |
| parent | mtd: nand: mpc5121: use 'of_machine_is_compatible' to simplify code (diff) | |
| download | linux-dev-c03d996900f9d063b47ef7462885a9085c8a587f.tar.xz linux-dev-c03d996900f9d063b47ef7462885a9085c8a587f.zip | |
mtd: nand: add NAND_NEED_SCRAMBLING option flag
Some MLC NANDs are sensitive 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>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'include/linux/mtd')
| -rw-r--r-- | include/linux/mtd/nand.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index bdd68e22b5a5..a13dfd5bc58b 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -168,6 +168,12 @@ 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 |