diff options
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/nand/raw/nand_base.c | 30 |
1 files changed, 18 insertions, 12 deletions
diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c index dd276df31ffe..3e4a525ac3ca 100644 --- a/drivers/mtd/nand/raw/nand_base.c +++ b/drivers/mtd/nand/raw/nand_base.c @@ -5274,20 +5274,24 @@ static void of_get_nand_ecc_legacy_user_config(struct nand_chip *chip) user_conf->placement = of_get_rawnand_ecc_placement_legacy(dn); } -static int of_get_nand_bus_width(struct device_node *np) +static int of_get_nand_bus_width(struct nand_chip *chip) { + struct device_node *dn = nand_get_flash_node(chip); u32 val; + int ret; - if (of_property_read_u32(np, "nand-bus-width", &val)) - return 8; + ret = of_property_read_u32(dn, "nand-bus-width", &val); + if (ret == -EINVAL) + /* Buswidth defaults to 8 if the property does not exist .*/ + return 0; + else if (ret) + return ret; - switch (val) { - case 8: - case 16: - return val; - default: - return -EIO; - } + if (val == 16) + chip->options |= NAND_BUSWIDTH_16; + else if (val != 8) + return -EINVAL; + return 0; } static int of_get_nand_secure_regions(struct nand_chip *chip) @@ -5363,12 +5367,14 @@ static int rawnand_dt_init(struct nand_chip *chip) { struct nand_device *nand = mtd_to_nanddev(nand_to_mtd(chip)); struct device_node *dn = nand_get_flash_node(chip); + int ret; if (!dn) return 0; - if (of_get_nand_bus_width(dn) == 16) - chip->options |= NAND_BUSWIDTH_16; + ret = of_get_nand_bus_width(chip); + if (ret) + return ret; if (of_property_read_bool(dn, "nand-is-boot-medium")) chip->options |= NAND_IS_BOOT_MEDIUM; |