[U-Boot] [PATCH 2/2] atmel_nand: Add 32 bit ecc support for sama5d2 chip

[Andreas Bießmann]

On 24.11.2015 09:34, Josh Wu wrote:
> Also if minimum ecc requirment is bigger then what we support, then just
> use our maxium pmecc support.
> But it is not safe, so we'll output a warning about this.
> 
> Signed-off-by: Josh Wu <josh.wu at atmel.com>

Reviewed-by: Andreas Bießmann <andreas.devel at googlemail.com>

> ---
> 
>  drivers/mtd/nand/atmel_nand.c | 10 +++++++++-
>  1 file changed, 9 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c
> index 2967eee..bb54e0f 100644
> --- a/drivers/mtd/nand/atmel_nand.c
> +++ b/drivers/mtd/nand/atmel_nand.c
> @@ -80,6 +80,7 @@ static struct nand_ecclayout atmel_pmecc_oobinfo;
>   *                8-bits                13-bytes                 14-bytes
>   *               12-bits                20-bytes                 21-bytes
>   *               24-bits                39-bytes                 42-bytes
> + *               32-bits                52-bytes                 56-bytes
>   */
>  static int pmecc_get_ecc_bytes(int cap, int sector_size)
>  {
> @@ -638,6 +639,9 @@ static void atmel_pmecc_core_init(struct mtd_info *mtd)
>  	case 24:
>  		val = PMECC_CFG_BCH_ERR24;
>  		break;
> +	case 32:
> +		val = PMECC_CFG_BCH_ERR32;
> +		break;
>  	}
>  
>  	if (host->pmecc_sector_size == 512)
> @@ -723,7 +727,11 @@ static int pmecc_choose_ecc(struct atmel_nand_host *host,
>  		else if (*cap <= 24)
>  			host->pmecc_corr_cap = 24;
>  		else
> -			return -EINVAL;
> +#ifdef CONFIG_SAMA5D2
> +			host->pmecc_corr_cap = 32;
> +#else
> +			host->pmecc_corr_cap = 24;
> +#endif
>  	}
>  	if (host->pmecc_sector_size == 0) {
>  		/* use the most fitable sector size (the near smaller one ) */
>