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author | Sascha Hauer <s.hauer@pengutronix.de> | 2016-06-22 08:42:23 +0200 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2016-06-22 08:45:45 +0200 |
commit | 13ef2b249063b33b3dd264c57c418015d2503339 (patch) | |
tree | 9bd4af2e6e9b489a5310e97bb993747e80de312e /drivers | |
parent | 22d7d604f13968fdaeadda73e81e930e933d7e10 (diff) | |
download | barebox-13ef2b249063b33b3dd264c57c418015d2503339.tar.gz barebox-13ef2b249063b33b3dd264c57c418015d2503339.tar.xz |
mtd: nand: gpmi: Use subpage reads only on suitable NAND chips
On some NAND chips the driver uses a ECC size that is not dividable by
the number of chunks per page which means a single chunk cannot be read.
Disable the subpage feature for these NANDs. This is quite unfortunate
since the subpage feature really speeds up scanning NAND chips.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/mtd/nand/nand_mxs.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/mtd/nand/nand_mxs.c b/drivers/mtd/nand/nand_mxs.c index a9c6e964aa..fd4e20954f 100644 --- a/drivers/mtd/nand/nand_mxs.c +++ b/drivers/mtd/nand/nand_mxs.c @@ -1392,14 +1392,16 @@ static int mxs_nand_probe(struct device_d *dev) nand->ecc.size = 512; nand->ecc.strength = 8; - nand->ecc.read_subpage = gpmi_ecc_read_subpage; - nand->options |= NAND_SUBPAGE_READ; - /* first scan to find the device and get the page size */ err = nand_scan_ident(mtd, 4, NULL); if (err) goto err2; + if ((13 * mxs_nand_get_ecc_strength(mtd->writesize, mtd->oobsize) % 8) == 0) { + nand->ecc.read_subpage = gpmi_ecc_read_subpage; + nand->options |= NAND_SUBPAGE_READ; + } + nand->options |= NAND_NO_SUBPAGE_WRITE; /* second phase scan */ |