| Message ID | 1444929443-25537-2-git-send-email-boris.brezillon@free-electrons.com |
|---|---|
| State | Accepted |
| Commit | c03d996900f9d063b47ef7462885a9085c8a587f |
| Headers | show |
Hi Boris,
On Fri, Oct 16, 2015 at 4:17 AM, Boris Brezillon
<boris.brezillon@free-electrons.com> wrote:
> Some MLC NANDs are sensible to repeated patterns and require data to be
Do you mean "sensitive" instead of "sensible"?
Thanks,
Hi Julian, On Fri, 16 Oct 2015 09:32:38 +1100 Julian Calaby <julian.calaby@gmail.com> wrote: > Hi Boris, > > On Fri, Oct 16, 2015 at 4:17 AM, Boris Brezillon > <boris.brezillon@free-electrons.com> wrote: > > Some MLC NANDs are sensible to repeated patterns and require data to be > > Do you mean "sensitive" instead of "sensible"? Yes (I always mix the too, sensible is the french word for sensitive ;-)), I'll fix that. Best Regards, Boris
On Fri, 16 Oct 2015 08:28:54 +0200 Boris Brezillon <boris.brezillon@free-electrons.com> wrote: > Hi Julian, > > On Fri, 16 Oct 2015 09:32:38 +1100 > Julian Calaby <julian.calaby@gmail.com> wrote: > > > Hi Boris, > > > > On Fri, Oct 16, 2015 at 4:17 AM, Boris Brezillon > > <boris.brezillon@free-electrons.com> wrote: > > > Some MLC NANDs are sensible to repeated patterns and require data to be > > > > Do you mean "sensitive" instead of "sensible"? > > Yes (I always mix the too, sensible is the french word for two > sensitive ;-)), I'll fix that. > > Best Regards, > > Boris >
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
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(+)