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nand: Move the sub-page read support enable to a flag

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Use a flag instead of a hard-coded macro so that sub-page reads can be
enabled in other cases (such as on-die ecc).

This is the same as a5ff4f102937a3492bca4a9ff0c341d78813414c in Linux

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
This commit is contained in:
Joe Hershberger
2012-11-05 06:46:31 +00:00
committed by Scott Wood
parent 79da5e3d5d
commit c788ecfdc3
2 changed files with 11 additions and 5 deletions
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9
drivers/mtd/nand/nand_base.c
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@@ -1245,7 +1245,8 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from,
if (unlikely(ops->mode == MTD_OOB_RAW))
ret = chip->ecc.read_page_raw(mtd, chip,
bufpoi, page);
else if (!aligned && NAND_SUBPAGE_READ(chip) && !oob)
else if (!aligned && NAND_HAS_SUBPAGE_READ(chip) &&
!oob)
ret = chip->ecc.read_subpage(mtd, chip,
col, bytes, bufpoi);
else
@@ -1256,7 +1257,7 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from,
/* Transfer not aligned data */
if (!aligned) {
if (!NAND_SUBPAGE_READ(chip) && !oob &&
if (!NAND_HAS_SUBPAGE_READ(chip) && !oob &&
!(mtd->ecc_stats.failed - stats.failed))
chip->pagebuf = realpage;
memcpy(buf, chip->buffers->databuf + col, bytes);
@@ -3150,6 +3151,10 @@ int nand_scan_tail(struct mtd_info *mtd)
/* Invalidate the pagebuffer reference */
chip->pagebuf = -1;
/* Large page NAND with SOFT_ECC should support subpage reads */
if ((chip->ecc.mode == NAND_ECC_SOFT) && (chip->page_shift > 9))
chip->options |= NAND_SUBPAGE_READ;
/* Fill in remaining MTD driver data */
mtd->type = MTD_NANDFLASH;
mtd->flags = (chip->options & NAND_ROM) ? MTD_CAP_ROM :