Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1251327 > unrolled thread

Re: [PATCH 2/3] mtd: nand: add NAND_NEED_SCRAMBLING flag to the H27UCG8T2ATR-BC definition

Back to article view | Back to linux.kernel

This discussion starts older than the indexed window; earlier articles aren't shown. The article labeled Started by below is the oldest one visible, not the original post.

Contents

  Re: [PATCH 2/3] mtd: nand: add NAND_NEED_SCRAMBLING flag to the  H27UCG8T2ATR-BC definition Richard Weinberger <richard.weinberger@gmail.com> - 2015-10-20 09:30 +0200
    Re: [PATCH 2/3] mtd: nand: add NAND_NEED_SCRAMBLING flag to the  H27UCG8T2ATR-BC definition Boris Brezillon <boris.brezillon@free-electrons.com> - 2015-10-20 11:20 +0200

#1251327 — Re: [PATCH 2/3] mtd: nand: add NAND_NEED_SCRAMBLING flag to the H27UCG8T2ATR-BC definition

On Thu, Oct 15, 2015 at 7:17 PM, Boris Brezillon
<boris.brezillon@free-electrons.com> wrote:
> The H27UCG8T2ATR-BC requires an external data scrambler. Reflect this
> constraint in the nand_flash_ids definition.
>
> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
> ---
>  drivers/mtd/nand/nand_ids.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/mtd/nand/nand_ids.c b/drivers/mtd/nand/nand_ids.c
> index a8804a3..ccc05f5 100644
> --- a/drivers/mtd/nand/nand_ids.c
> +++ b/drivers/mtd/nand/nand_ids.c
> @@ -50,8 +50,8 @@ struct nand_flash_dev nand_flash_ids[] = {
>                   SZ_16K, SZ_8K, SZ_4M, 0, 6, 1280, NAND_ECC_INFO(40, SZ_1K) },
>         {"H27UCG8T2ATR-BC 64G 3.3V 8-bit",
>                 { .id = {0xad, 0xde, 0x94, 0xda, 0x74, 0xc4} },
> -                 SZ_8K, SZ_8K, SZ_2M, 0, 6, 640, NAND_ECC_INFO(40, SZ_1K),
> -                 4 },
> +                 SZ_8K, SZ_8K, SZ_2M, NAND_NEED_SCRAMBLING, 6, 640,
> +                 NAND_ECC_INFO(40, SZ_1K), 4 },

Would it make sense to print a warning if a NAND which needs scrambling
is used on a NFC which does not support this feature?

-- 
Thanks,
//richard
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[toc] | [next] | [standalone]

#1251477

On Tue, 20 Oct 2015 09:20:10 +0200
Richard Weinberger <richard.weinberger@gmail.com> wrote:

> On Thu, Oct 15, 2015 at 7:17 PM, Boris Brezillon
> <boris.brezillon@free-electrons.com> wrote:
> > The H27UCG8T2ATR-BC requires an external data scrambler. Reflect this
> > constraint in the nand_flash_ids definition.
> >
> > Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
> > ---
> >  drivers/mtd/nand/nand_ids.c | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/mtd/nand/nand_ids.c b/drivers/mtd/nand/nand_ids.c
> > index a8804a3..ccc05f5 100644
> > --- a/drivers/mtd/nand/nand_ids.c
> > +++ b/drivers/mtd/nand/nand_ids.c
> > @@ -50,8 +50,8 @@ struct nand_flash_dev nand_flash_ids[] = {
> >                   SZ_16K, SZ_8K, SZ_4M, 0, 6, 1280, NAND_ECC_INFO(40, SZ_1K) },
> >         {"H27UCG8T2ATR-BC 64G 3.3V 8-bit",
> >                 { .id = {0xad, 0xde, 0x94, 0xda, 0x74, 0xc4} },
> > -                 SZ_8K, SZ_8K, SZ_2M, 0, 6, 640, NAND_ECC_INFO(40, SZ_1K),
> > -                 4 },
> > +                 SZ_8K, SZ_8K, SZ_2M, NAND_NEED_SCRAMBLING, 6, 640,
> > +                 NAND_ECC_INFO(40, SZ_1K), 4 },
> 
> Would it make sense to print a warning if a NAND which needs scrambling
> is used on a NFC which does not support this feature?
> 

Maybe, but if we want to make this warning generic this implies adding
a new NAND_CONTROLLER_SUPPORTS_SCRAMBLING flag.

-- 
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[toc] | [prev] | [standalone]

Back to top | Article view | linux.kernel

csiph-web