Re: [PATCH v3 1/6] mtd: rawnand: add Reed-Solomon error correction algorithm

From: Stefan Agner
Date: Fri Jun 01 2018 - 09:34:44 EST


On 01.06.2018 11:25, Boris Brezillon wrote:
> On Fri, 1 Jun 2018 09:26:00 +0200
> Boris Brezillon <boris.brezillon@xxxxxxxxxxx> wrote:
>
>> On Fri, 1 Jun 2018 00:16:32 +0200
>> Stefan Agner <stefan@xxxxxxxx> wrote:
>>
>> > Add Reed-Solomon (RS) to the enumeration of ECC algorithms.
>> >
>> > Signed-off-by: Stefan Agner <stefan@xxxxxxxx>
>>
>> Reviewed-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxx>
>>
>> > ---
>> > drivers/mtd/nand/raw/nand_base.c | 1 +
>> > include/linux/mtd/rawnand.h | 1 +
>
> Hm, you forgot to update Documentation/devicetree/bindings/mtd/nand.txt.
>

Yeah I was not sure about that. Currently it says:

- nand-ecc-algo: string, algorithm of NAND ECC.

Supported values are: "hamming", "bch".

Is supported meant by software ECC here? I feel "supported" is a rather
strong word since it is clearly controller dependent whether it is
actually supported...

--
Stefan

>> > 2 files changed, 2 insertions(+)
>> >
>> > diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
>> > index f28c3a555861..9eb5678dd6d0 100644
>> > --- a/drivers/mtd/nand/raw/nand_base.c
>> > +++ b/drivers/mtd/nand/raw/nand_base.c
>> > @@ -5744,6 +5744,7 @@ static int of_get_nand_ecc_mode(struct device_node *np)
>> > static const char * const nand_ecc_algos[] = {
>> > [NAND_ECC_HAMMING] = "hamming",
>> > [NAND_ECC_BCH] = "bch",
>> > + [NAND_ECC_RS] = "rs",
>> > };
>> >
>> > static int of_get_nand_ecc_algo(struct device_node *np)
>> > diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
>> > index 5dad59b31244..6a82da8c44ce 100644
>> > --- a/include/linux/mtd/rawnand.h
>> > +++ b/include/linux/mtd/rawnand.h
>> > @@ -114,6 +114,7 @@ enum nand_ecc_algo {
>> > NAND_ECC_UNKNOWN,
>> > NAND_ECC_HAMMING,
>> > NAND_ECC_BCH,
>> > + NAND_ECC_RS,
>> > };
>> >
>> > /*
>>
>>
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