diff options
Diffstat (limited to 'drivers/of/of_mtd.c')
| -rw-r--r-- | drivers/of/of_mtd.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/of/of_mtd.c b/drivers/of/of_mtd.c index b7361ed70537..15d056e181d2 100644 --- a/drivers/of/of_mtd.c +++ b/drivers/of/of_mtd.c @@ -50,6 +50,42 @@ int of_get_nand_ecc_mode(struct device_node *np) EXPORT_SYMBOL_GPL(of_get_nand_ecc_mode); /** + * of_get_nand_ecc_algo - Get nand ecc algorithm for given device_node + * @np: Pointer to the given device_node + * + * The function gets ecc algorithm and returns its enum value, or errno in error + * case. + */ +int of_get_nand_ecc_algo(struct device_node *np) +{ + const char *pm; + int err; + + /* + * 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. + */ + + /* + * For backward compatibility we also read "nand-ecc-mode" checking + * for some obsoleted values that were specifying ECC algorithm. + */ + err = of_property_read_string(np, "nand-ecc-mode", &pm); + if (err < 0) + return err; + + if (!strcasecmp(pm, "soft")) + return NAND_ECC_HAMMING; + else if (!strcasecmp(pm, "soft_bch")) + return NAND_ECC_BCH; + + return -ENODEV; +} +EXPORT_SYMBOL_GPL(of_get_nand_ecc_algo); + +/** * of_get_nand_ecc_step_size - Get ECC step size associated to * the required ECC strength (see below). * @np: Pointer to the given device_node |