The Hynix nand flashes store their ECC requirements in byte 4 of its id
(returned on READ ID command).
Signed-off-by: Boris BREZILLON <b.brezillon.dev@xxxxxxxxx>
---
drivers/mtd/nand/nand_base.c | 37 +++++++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index bd39f7b..15069ec 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -3202,6 +3202,43 @@ static void nand_decode_ext_id(struct mtd_info *mtd, struct nand_chip *chip,
else
mtd->erasesize = (64 * 1024) << tmp;
*busw = 0;
+
+ /* Retrieve ECC infos */
+ switch ((id_data[4] >> 4) & 0x7) {
+ case 1:
+ chip->ecc_step_ds = 512;
+ chip->ecc_strength_ds = 1;
+ break;
+ case 2:
+ chip->ecc_step_ds = 512;
+ chip->ecc_strength_ds = 2;
+ break;
+ case 3:
+ chip->ecc_step_ds = 512;
+ chip->ecc_strength_ds = 4;
+ break;
+ case 4:
+ chip->ecc_step_ds = 512;
+ chip->ecc_strength_ds = 8;
+ break;
+ case 5:
+ chip->ecc_step_ds = 1024;
+ chip->ecc_strength_ds = 24;
+ break;
+ case 6:
+ chip->ecc_step_ds = 1024;
+ chip->ecc_strength_ds = 32;
+ break;
+ case 7:
+ chip->ecc_step_ds = 1024;
+ chip->ecc_strength_ds = 40;
+ break;
+ case 0:
+ default:
+ chip->ecc_step_ds = 0;
+ chip->ecc_strength_ds = 0;
+ break;
+ }
} else {
/* Calc pagesize */
mtd->writesize = 1024 << (extid & 0x03);
--
1.7.9.5
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
