linux-kernel - [PATCH 1/4] mtd: nand: omap2: Update nerrors using ecc.strength

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Date:	Wed, 3 Oct 2012 19:59:46 +0530
From:	"Philip, Avinash" <avinashphilip@...com>
To:	<dwmw2@...radead.org>, <artem.bityutskiy@...ux.intel.com>,
	<tony@...mide.com>
CC:	<afzal@...com>, <linux-mtd@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-doc@...r.kernel.org>, <devicetree-discuss@...ts.ozlabs.org>,
	<ivan.djelic@...rot.com>, "Philip, Avinash" <avinashphilip@...com>
Subject: [PATCH 1/4] mtd: nand: omap2: Update nerrors using ecc.strength

Update number of errors using nand ecc strength.
Also add macro definitions BCH8_ERROR_MAX & BCH4_ERROR_MAX

Signed-off-by: Philip, Avinash <avinashphilip@...com>
---
:100644 100644 5b31386... af511a9... M	drivers/mtd/nand/omap2.c
 drivers/mtd/nand/omap2.c |   12 ++++++++----
 1 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c
index 5b31386..af511a9 100644
--- a/drivers/mtd/nand/omap2.c
+++ b/drivers/mtd/nand/omap2.c
@@ -111,6 +111,9 @@
 #define	ECCCLEAR			0x100
 #define	ECC1				0x1
 
+#define BCH8_MAX_ERROR		8	/* upto 8 bit coorectable */
+#define BCH4_MAX_ERROR		4	/* upto 4 bit correctable */
+
 /* oob info generated runtime depending on ecc algorithm and layout selected */
 static struct nand_ecclayout omap_oobinfo;
 /* Define some generic bad / good block scan pattern which are used
@@ -1034,7 +1037,7 @@ static void omap3_enable_hwecc_bch(struct mtd_info *mtd, int mode)
 						   mtd);
 	struct nand_chip *chip = mtd->priv;
 
-	nerrors = (info->nand.ecc.bytes == 13) ? 8 : 4;
+	nerrors = info->nand.ecc.strength;
 	dev_width = (chip->options & NAND_BUSWIDTH_16) ? 1 : 0;
 	/*
 	 * Program GPMC to perform correction on one 512-byte sector at a time.
@@ -1129,13 +1132,14 @@ static int omap3_init_bch(struct mtd_info *mtd, int ecc_opt)
 	struct omap_nand_info *info = container_of(mtd, struct omap_nand_info,
 						   mtd);
 #ifdef CONFIG_MTD_NAND_OMAP_BCH8
-	const int hw_errors = 8;
+	const int hw_errors = BCH8_MAX_ERROR;
 #else
-	const int hw_errors = 4;
+	const int hw_errors = BCH4_MAX_ERROR;
 #endif
 	info->bch = NULL;
 
-	max_errors = (ecc_opt == OMAP_ECC_BCH8_CODE_HW) ? 8 : 4;
+	max_errors = (ecc_opt == OMAP_ECC_BCH8_CODE_HW) ?
+		BCH8_MAX_ERROR : BCH4_MAX_ERROR;
 	if (max_errors != hw_errors) {
 		pr_err("cannot configure %d-bit BCH ecc, only %d-bit supported",
 		       max_errors, hw_errors);
-- 
1.7.0.4

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