[U-Boot] [PATCH] NAND: Allow drivers to choose ECC block size

[Scott Wood]

On Fri, Nov 06, 2009 at 10:53:36AM -0500, s-paulraj at ti.com wrote:
> From: Sandeep Paulraj <s-paulraj at ti.com>
> 
> This patch allows the NAND driver to choose ECC block size in
> sw ecc case.
> 
> Signed-off-by: Sandeep Paulraj <s-paulraj at ti.com>
> ---
> This applies to u-boot-nand-flash/next
>  drivers/mtd/nand/nand_base.c |    3 ++-
>  1 files changed, 2 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
> index 9263a69..e62060d 100644
> --- a/drivers/mtd/nand/nand_base.c
> +++ b/drivers/mtd/nand/nand_base.c
> @@ -2842,7 +2842,8 @@ int nand_scan_tail(struct mtd_info *mtd)
>  		chip->ecc.write_page = nand_write_page_swecc;
>  		chip->ecc.read_oob = nand_read_oob_std;
>  		chip->ecc.write_oob = nand_write_oob_std;
> -		chip->ecc.size = 256;
> +		if (!chip->ecc.size)
> +			chip->ecc.size = 256;
>  		chip->ecc.bytes = 3;
>  		break;

For this to work, won't the driver have to also be able to override
ecc.calculate, or else nand_calculate_ecc need to be changed to support
other ECC block sizes?

-Scott