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mtd: rawnand: micron: allow forced on-die ECC 

Some Micron NAND chips have on-die ECC forceably enabled. Allow such
chips to be used as long as the controller has set chip->ecc.mode to
NAND_ECC_ON_DIE.

Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
This commit is contained in:
Chris Packham 2018-07-18 10:42:18 +02:00 committed by Miquel Raynal
parent 0d6030ac04
commit cb2bf403a4
1 changed files with 10 additions and 3 deletions
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13
drivers/mtd/nand/raw/nand_micron.c
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@ -374,7 +374,8 @@ static int micron_nand_init(struct nand_chip *chip)
ondie = micron_supports_on_die_ecc(chip);
if (ondie == MICRON_ON_DIE_MANDATORY) {
if (ondie == MICRON_ON_DIE_MANDATORY &&
chip->ecc.mode != NAND_ECC_ON_DIE) {
pr_err("On-die ECC forcefully enabled, not supported\n");
return -EINVAL;
}
@ -398,8 +399,14 @@ static int micron_nand_init(struct nand_chip *chip)
chip->ecc.algo = NAND_ECC_BCH;
chip->ecc.read_page = micron_nand_read_page_on_die_ecc;
chip->ecc.write_page = micron_nand_write_page_on_die_ecc;
chip->ecc.read_page_raw = nand_read_page_raw;
chip->ecc.write_page_raw = nand_write_page_raw;
if (ondie == MICRON_ON_DIE_MANDATORY) {
chip->ecc.read_page_raw = nand_read_page_raw_notsupp;
chip->ecc.write_page_raw = nand_write_page_raw_notsupp;
} else {
chip->ecc.read_page_raw = nand_read_page_raw;
chip->ecc.write_page_raw = nand_write_page_raw;
}
}
return 0;