mtd: get the ECC info from the parameter page for ONFI nand

From the ONFI spec, we can just get the ECC info from the @ecc_bits field of
the parameter page.

Signed-off-by: Huang Shijie <b32955@freescale.com>
Reviewed-and-tested-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index fcb5811ab51d..2c70ed432c72 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -2924,6 +2924,11 @@ static int nand_flash_detect_onfi(struct mtd_info *mtd, struct nand_chip *chip,
         if (le16_to_cpu(p->features) & 1)
                 *busw = NAND_BUSWIDTH_16;
 
+        if (p->ecc_bits != 0xff) {
+                chip->ecc_strength_ds = p->ecc_bits;
+                chip->ecc_step_ds = 512;
+        }
+
         pr_info("ONFI flash detected\n");
         return 1;
 }