mtd: eLBC NAND: update ecc_stats.corrected when lteccr available
Signed-off-by: Michael Hench <MichaelHench@gmail.com>
Acked-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@intel.com>
diff --git a/drivers/mtd/nand/fsl_elbc_nand.c b/drivers/mtd/nand/fsl_elbc_nand.c
index acc27ee..eedd8ee 100644
--- a/drivers/mtd/nand/fsl_elbc_nand.c
+++ b/drivers/mtd/nand/fsl_elbc_nand.c
@@ -243,6 +243,25 @@
return -EIO;
}
+ if (chip->ecc.mode != NAND_ECC_HW)
+ return 0;
+
+ if (elbc_fcm_ctrl->read_bytes == mtd->writesize + mtd->oobsize) {
+ uint32_t lteccr = in_be32(&lbc->lteccr);
+ /*
+ * if command was a full page read and the ELBC
+ * has the LTECCR register, then bits 12-15 (ppc order) of
+ * LTECCR indicates which 512 byte sub-pages had fixed errors.
+ * bits 28-31 are uncorrectable errors, marked elsewhere.
+ * for small page nand only 1 bit is used.
+ * if the ELBC doesn't have the lteccr register it reads 0
+ */
+ if (lteccr & 0x000F000F)
+ out_be32(&lbc->lteccr, 0x000F000F); /* clear lteccr */
+ if (lteccr & 0x000F0000)
+ mtd->ecc_stats.corrected++;
+ }
+
return 0;
}