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mtd: nand: add support for "nand-ecc-algo" DT property

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So far it was only possible to specify ECC algorithm using "soft" and
"soft_bch" values of nand-ecc-mode prop. There wasn't a way to specify
it for a hardware ECC mode.

Now that we have independent field in NAND subsystem for storing info
about ECC algorithm we may also add support for this new DT property.

Signed-off-by: Rafał Miłecki <[email protected]>
Acked-by: Rob Herring <[email protected]>
Signed-off-by: Boris Brezillon <[email protected]>
This commit is contained in:
Rafał Miłecki 2016-04-22 13:23:13 +02:00 • committed by Boris Brezillon
commit ba4f46b28f
2 changed files with 15 additions and 7 deletions
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20
drivers/mtd/nand/nand_base.c
View file

@ -4003,17 +4003,23 @@ static int of_get_nand_ecc_mode(struct device_node *np)
return -ENODEV;
}
static const char * const nand_ecc_algos[] = {
[NAND_ECC_HAMMING] = "hamming",
[NAND_ECC_BCH] = "bch",
};
static int of_get_nand_ecc_algo(struct device_node *np)
{
const char *pm;
int err;
int err, i;
/*
* TODO: Read ECC algo OF property and map it to enum nand_ecc_algo.
* It's not implemented yet as currently NAND subsystem ignores
* algorithm explicitly set this way. Once it's handled we should
* document & support new property.
*/
err = of_property_read_string(np, "nand-ecc-algo", &pm);
if (!err) {
for (i = NAND_ECC_HAMMING; i < ARRAY_SIZE(nand_ecc_algos); i++)
if (!strcasecmp(pm, nand_ecc_algos[i]))
return i;
return -ENODEV;
}
/*
* For backward compatibility we also read "nand-ecc-mode" checking