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Message-ID: <20250904131741.3097897-1-s-k6@ti.com>
Date: Thu, 4 Sep 2025 18:47:41 +0530
From: Santhosh Kumar K <s-k6@...com>
To: <miquel.raynal@...tlin.com>, <richard@....at>, <vigneshr@...com>,
<quic_mdalam@...cinc.com>, <quic_sridsn@...cinc.com>
CC: <linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
<s-k6@...com>, <praneeth@...com>, <p-mantena@...com>, <a-dutta@...com>,
<u-kumar1@...com>, <stable@...r.kernel.org>
Subject: [PATCH v3] mtd: spinand: winbond: Fix oob_layout for W25N01JW
Fix the W25N01JW's oob_layout according to the datasheet [1]
[1] https://www.winbond.com/hq/product/code-storage-flash-memory/qspinand-flash/?__locale=en&partNo=W25N01JW
Fixes: 6a804fb72de5 ("mtd: spinand: winbond: add support for serial NAND flash")
Cc: Sridharan S N <quic_sridsn@...cinc.com>
Cc: stable@...r.kernel.org
Signed-off-by: Santhosh Kumar K <s-k6@...com>
---
Changes in v3:
- Fix regions' offset and length aligned for Bad Block Management
only for section 0
- Rebase on next
- Link to v2: https://lore.kernel.org/linux-mtd/20250213060018.2664518-1-s-k6@ti.com/
Changes in v2:
- Detach patch 3/3 from v1
- Rebase on next
- Link to v1: https://lore.kernel.org/linux-mtd/20250102115110.1402440-1-s-k6@ti.com/
---
drivers/mtd/nand/spi/winbond.c | 37 +++++++++++++++++++++++++++++++++-
1 file changed, 36 insertions(+), 1 deletion(-)
diff --git a/drivers/mtd/nand/spi/winbond.c b/drivers/mtd/nand/spi/winbond.c
index 87053389a1fc..4870b2d5edb2 100644
--- a/drivers/mtd/nand/spi/winbond.c
+++ b/drivers/mtd/nand/spi/winbond.c
@@ -176,6 +176,36 @@ static const struct mtd_ooblayout_ops w25n02kv_ooblayout = {
.free = w25n02kv_ooblayout_free,
};
+static int w25n01jw_ooblayout_ecc(struct mtd_info *mtd, int section,
+ struct mtd_oob_region *region)
+{
+ if (section > 3)
+ return -ERANGE;
+
+ region->offset = (16 * section) + 12;
+ region->length = 4;
+
+ return 0;
+}
+
+static int w25n01jw_ooblayout_free(struct mtd_info *mtd, int section,
+ struct mtd_oob_region *region)
+{
+ if (section > 3)
+ return -ERANGE;
+
+ region->offset = (16 * section);
+ region->length = 12;
+
+ /* Extract BBM */
+ if (!section) {
+ region->offset += 2;
+ region->length -= 2;
+ }
+
+ return 0;
+}
+
static int w35n01jw_ooblayout_ecc(struct mtd_info *mtd, int section,
struct mtd_oob_region *region)
{
@@ -206,6 +236,11 @@ static int w35n01jw_ooblayout_free(struct mtd_info *mtd, int section,
return 0;
}
+static const struct mtd_ooblayout_ops w25n01jw_ooblayout = {
+ .ecc = w25n01jw_ooblayout_ecc,
+ .free = w25n01jw_ooblayout_free,
+};
+
static const struct mtd_ooblayout_ops w35n01jw_ooblayout = {
.ecc = w35n01jw_ooblayout_ecc,
.free = w35n01jw_ooblayout_free,
@@ -394,7 +429,7 @@ static const struct spinand_info winbond_spinand_table[] = {
&write_cache_variants,
&update_cache_variants),
0,
- SPINAND_ECCINFO(&w25m02gv_ooblayout, NULL),
+ SPINAND_ECCINFO(&w25n01jw_ooblayout, NULL),
SPINAND_CONFIGURE_CHIP(w25n0xjw_hs_cfg)),
SPINAND_INFO("W25N01KV", /* 3.3V */
SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xae, 0x21),
--
2.34.1
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