[U-Boot] [PATCH] MTD: atmel_nand: support for software BCH ECC

[Bo Shen]

Hi Andreas,

On 9/4/2013 6:23 PM, Andreas Bießmann wrote:
> Hi Bo,
>
> On 08/28/2013 04:54 PM, Bo Shen wrote:
>> Add possible to use software BCH ECC for atmel nand driver
>>
>> Signed-off-by: Bo Shen <voice.shen at gmail.com>
>>
>> ---
>>   drivers/mtd/nand/atmel_nand.c |    4 ++++
>>   1 file changed, 4 insertions(+)
>>
>> diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c
>> index 96aca00..52efbee 100644
>> --- a/drivers/mtd/nand/atmel_nand.c
>> +++ b/drivers/mtd/nand/atmel_nand.c
>> @@ -1177,7 +1177,11 @@ int atmel_nand_chip_init(int devnum, ulong base_addr)
>>   	mtd->priv = nand;
>>   	nand->IO_ADDR_R = nand->IO_ADDR_W = (void  __iomem *)base_addr;
>>
>> +#ifdef CONFIG_NAND_ECC_BCH
>> +	nand->ecc.mode = NAND_ECC_SOFT_BCH;
>> +#else
>>   	nand->ecc.mode = NAND_ECC_SOFT;
>> +#endif
>
> I don't think this is enough for sw supported bch. Where do you feed the
> libbch?

Yes, we need libbch.

If we really want to enable software BCH support. It also need add 
following two options in board configuration file.
---8>---
#define CONFIG_NAND_ECC_BCH
#define CONFIG_BCH
---<8---

So, this patch give us option to enable software BCH.

> Best regards
>
> Andreas Bießmann
>

Best Regards,
Bo Shen