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authorMartin Blumenstingl <martin.blumenstingl@googlemail.com>2017-08-05 14:16:24 +0200
committerBoris Brezillon <boris.brezillon@free-electrons.com>2017-08-23 16:49:21 +0200
commitfd213b5bae800dc00a2930dcd07f63ab9bbff3f9 (patch)
treeb194d8f63961a1e79c527b070367bcf8d0632b44 /drivers/mtd
parent3bff08dffe3115a25ce04b95ea75f6d868572c60 (diff)
downloadlinux-fd213b5bae800dc00a2930dcd07f63ab9bbff3f9.tar.bz2
mtd: nand: hynix: add support for 20nm NAND chips
According to the datasheet of the H27UCG8T2BTR the NAND Technology field (6th byte of the "Device Identifier Description", bits 0-2) the following values are possible: - 0x0 = 48nm - 0x1 = 41nm - 0x2 = 32nm - 0x3 = 26nm - 0x4 = 20nm - (all others are reserved) Fix this by extending the mask for this field to allow detecting value 0x4 (20nm) as valid NAND technology. Without this the detection of the ECC requirements fails, because the code assumes that the device is a 48nm device (0x4 & 0x3 = 0x0) and aborts with "Invalid ECC requirements" because it cannot map the "ECC Level". Extending the mask makes the ECC requirement detection code recognize this chip as <= 26nm and sets up the ECC step size and ECC strength correctly. Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Fixes: 78f3482d7480 ("mtd: nand: hynix: Rework NAND ID decoding to extract more information") Cc: <stable@vger.kernel.org> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/nand/nand_hynix.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/mtd/nand/nand_hynix.c b/drivers/mtd/nand/nand_hynix.c
index b12dc7325378..bd9a6e343848 100644
--- a/drivers/mtd/nand/nand_hynix.c
+++ b/drivers/mtd/nand/nand_hynix.c
@@ -477,7 +477,7 @@ static void hynix_nand_extract_ecc_requirements(struct nand_chip *chip,
* The ECC requirements field meaning depends on the
* NAND technology.
*/
- u8 nand_tech = chip->id.data[5] & 0x3;
+ u8 nand_tech = chip->id.data[5] & 0x7;
if (nand_tech < 3) {
/* > 26nm, reference: H27UBG8T2A datasheet */
@@ -533,7 +533,7 @@ static void hynix_nand_extract_scrambling_requirements(struct nand_chip *chip,
if (nand_tech > 0)
chip->options |= NAND_NEED_SCRAMBLING;
} else {
- nand_tech = chip->id.data[5] & 0x3;
+ nand_tech = chip->id.data[5] & 0x7;
/* < 32nm */
if (nand_tech > 2)