mtd: nand: omap2: Update nerrors using ecc.strength

Remove check of ecc bytes with 13, number of errors can directly update
from nand ecc strength. This will increase re-usability of the code.
Also add macro definitions BCH8_ERROR_MAX & BCH4_ERROR_MAX for better
readability and cleaner code.

Signed-off-by: Philip Avinash <avinashphilip@ti.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>

diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c
index 0002d5e..ec20f67 100644 (file)
--- a/drivers/mtd/nand/omap2.c
+++ b/drivers/mtd/nand/omap2.c
@@ -117,6 +117,9 @@
 
 #define OMAP24XX_DMA_GPMC              4
 
+#define BCH8_MAX_ERROR         8       /* upto 8 bit correctable */
+#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
@@ -1041,7 +1044,7 @@ static void omap3_enable_hwecc_bch(struct mtd_info *mtd, int mode)
        struct nand_chip *chip = mtd->priv;
        u32 val;
 
-       nerrors = (info->nand.ecc.bytes == 13) ? 8 : 4;
+       nerrors = info->nand.ecc.strength;
        dev_width = (chip->options & NAND_BUSWIDTH_16) ? 1 : 0;
        nsectors = 1;
        /*
@@ -1218,13 +1221,14 @@ 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);