From 707d81545dbc3d3ee4ae093fc600831eb97302e7 Mon Sep 17 00:00:00 2001
From: Miquel Raynal <miquel.raynal@free-electrons.com>
Date: Thu, 7 Dec 2017 10:33:58 +0100
Subject: [PATCH] mtd: nand: samsung: add ECC requirements for K9F4G08U0D
Samsung NAND chip K9F4G08U0D minimum ECC strength requirement is 1 bit
per 512 bytes. As the chip is not ONFI nor JEDEC and because of the lack
of these values, boards using it fail to probe the NAND controller
driver. Fix this by setting up the default values.
Signed-off-by: Miquel Raynal <miquel.raynal@free-electrons.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
---
drivers/mtd/nand/nand_samsung.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/mtd/nand/nand_samsung.c b/drivers/mtd/nand/nand_samsung.c
index d348f0129ae7..f6b0a63a068c 100644
--- a/drivers/mtd/nand/nand_samsung.c
+++ b/drivers/mtd/nand/nand_samsung.c
@@ -91,6 +91,12 @@ static void samsung_nand_decode_id(struct nand_chip *chip)
}
} else {
nand_decode_ext_id(chip);
+
+ /* Datasheet values for SLC Samsung K9F4G08U0D-S[I|C]B0(T00) */
+ if (nand_is_slc(chip) && chip->id.data[1] == 0xDC) {
+ chip->ecc_step_ds = 512;
+ chip->ecc_strength_ds = 1;
+ }
}
}