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mtd: nand: subpage write support for hardware based ECC schemes

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This patch adds support for subpage (partial-page) writes when using
hardware based ECC schemes.
Advantages:
(1) reduces storage overhead when using file-systems like UBIFS, which
store LEB header at page-size granularity.
(2) allows independent subpage writes, thereby increasing NAND storage
efficiency for non-page aligned data.
+ updated cafe_nand and lpc32xx_mlc NAND drivers for change in
chip->write_page interface.

Signed-off-by: Gupta, Pekon <pekon@ti.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Gupta, Pekon
2013-03-15 17:55:53 +05:30
committed by David Woodhouse
parent 4ff6772b5b
commit 837a6ba4f3
4 changed files with 96 additions and 19 deletions
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4
drivers/mtd/nand/lpc32xx_mlc.c
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@@ -540,8 +540,8 @@ static int lpc32xx_write_page_lowlevel(struct mtd_info *mtd,
}
static int lpc32xx_write_page(struct mtd_info *mtd, struct nand_chip *chip,
const uint8_t *buf, int oob_required, int page,
int cached, int raw)
uint32_t offset, int data_len, const uint8_t *buf,
int oob_required, int page, int cached, int raw)
{
int res;