diff options
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/mtd/nand/nand_base.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index 6897167..4cf4518 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -29,6 +29,9 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <common.h> +#if CONFIG_IS_ENABLED(OF_CONTROL) +#include <fdtdec.h> +#endif #include <malloc.h> #include <watchdog.h> #include <linux/err.h> @@ -3763,6 +3766,66 @@ ident_done: return type; } +#if CONFIG_IS_ENABLED(OF_CONTROL) +DECLARE_GLOBAL_DATA_PTR; + +static int nand_dt_init(struct mtd_info *mtd, struct nand_chip *chip, int node) +{ + int ret, ecc_mode = -1, ecc_strength, ecc_step; + const void *blob = gd->fdt_blob; + const char *str; + + ret = fdtdec_get_int(blob, node, "nand-bus-width", -1); + if (ret == 16) + chip->options |= NAND_BUSWIDTH_16; + + if (fdtdec_get_bool(blob, node, "nand-on-flash-bbt")) + chip->bbt_options |= NAND_BBT_USE_FLASH; + + str = fdt_getprop(blob, node, "nand-ecc-mode", NULL); + if (str) { + if (!strcmp(str, "none")) + ecc_mode = NAND_ECC_NONE; + else if (!strcmp(str, "soft")) + ecc_mode = NAND_ECC_SOFT; + else if (!strcmp(str, "hw")) + ecc_mode = NAND_ECC_HW; + else if (!strcmp(str, "hw_syndrome")) + ecc_mode = NAND_ECC_HW_SYNDROME; + else if (!strcmp(str, "hw_oob_first")) + ecc_mode = NAND_ECC_HW_OOB_FIRST; + else if (!strcmp(str, "soft_bch")) + ecc_mode = NAND_ECC_SOFT_BCH; + } + + + ecc_strength = fdtdec_get_int(blob, node, "nand-ecc-strength", -1); + ecc_step = fdtdec_get_int(blob, node, "nand-ecc-step-size", -1); + + if ((ecc_step >= 0 && !(ecc_strength >= 0)) || + (!(ecc_step >= 0) && ecc_strength >= 0)) { + pr_err("must set both strength and step size in DT\n"); + return -EINVAL; + } + + if (ecc_mode >= 0) + chip->ecc.mode = ecc_mode; + + if (ecc_strength >= 0) + chip->ecc.strength = ecc_strength; + + if (ecc_step > 0) + chip->ecc.size = ecc_step; + + return 0; +} +#else +static int nand_dt_init(struct mtd_info *mtd, struct nand_chip *chip, int node) +{ + return 0; +} +#endif /* CONFIG_IS_ENABLED(OF_CONTROL) */ + /** * nand_scan_ident - [NAND Interface] Scan for the NAND device * @mtd: MTD device structure @@ -3779,6 +3842,13 @@ int nand_scan_ident(struct mtd_info *mtd, int maxchips, int i, nand_maf_id, nand_dev_id; struct nand_chip *chip = mtd_to_nand(mtd); struct nand_flash_dev *type; + int ret; + + if (chip->flash_node) { + ret = nand_dt_init(mtd, chip, chip->flash_node); + if (ret) + return ret; + } /* Set the default functions */ nand_set_defaults(chip, chip->options & NAND_BUSWIDTH_16); |