linux-kernel - [PATCH v6 02/10] mtd: get the ECC info from the parameter page for ONFI nand

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Date:	Fri, 17 May 2013 11:17:26 +0800
From:	Huang Shijie <b32955@...escale.com>
To:	<dwmw2@...radead.org>
CC:	<dedekind1@...il.com>, <computersforpeace@...il.com>,
	<linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
	<vikram186@...il.com>, Huang Shijie <b32955@...escale.com>
Subject: [PATCH v6 02/10] 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@...escale.com>
---
 drivers/mtd/nand/nand_base.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index edc7663..b63b731 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -2900,6 +2900,11 @@ 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;
 }
-- 
1.7.1


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