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mtd: nand: ipq: init mtd ecc strength and bitflip_threshold

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1. assign ecc strength in mtd structure which will be used by
   mtd layer
2. Initialize bitflip_threshold with 3*4 of ecc strength so
   that MTD layer will return EUCLEAN if number of ecc correction
   are more than bitflip_threshold.

Change-Id: I81cfe6059375117ced7888b877705919287a7be2
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org>
This commit is contained in:
Abhishek Sahu 2018-02-09 14:36:06 +05:30
parent 4dcba1bb54
commit e86df26289
1 changed files with 2 additions and 0 deletions
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2
drivers/mtd/nand/ipq_nand.c
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@ -1687,6 +1687,7 @@ int ipq_nand_scan(struct mtd_info *mtd)
mtd->_sync = ipq_nand_sync;
mtd->ecclayout = NULL;
mtd->bitflip_threshold = DIV_ROUND_UP(mtd->ecc_strength * 3, 4);
chip->page_shift = ffs(mtd->writesize) - 1;
chip->phys_erase_shift = ffs(mtd->erasesize) - 1;
@ -1735,6 +1736,7 @@ static void ipq_nand_hw_config(struct mtd_info *mtd, struct ipq_config *cfg)
/* Make the device OOB size as QPIC supported OOB size. */
mtd->oobsize = ipq_oob_size;
mtd->ecc_strength = cfg->ecc_mode;
if (dev->variant == QCA_NAND_QPIC) {
/*
* On IPQ40xx with the QPIC controller, we use BCH for both ECC