[PATCH] mtd: spinand: winbond: Fix oob_layout for W25N01JW

[Anurag Dutta]

From: Santhosh Kumar K <s-k6 at ti.com>

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: 2cbdd3e4491b ("mtd: spinand: Sync core code and device support with Linux 6.17-rc1")
Cc: Mikhail Kshevetskiy <mikhail.kshevetskiy at iopsys.eu>
Signed-off-by: Santhosh Kumar K <s-k6 at ti.com>
Signed-off-by: Anurag Dutta <a-dutta at 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 a89aaec516b..2786d91f19b 100644
--- a/drivers/mtd/nand/spi/winbond.c
+++ b/drivers/mtd/nand/spi/winbond.c
@@ -171,6 +171,36 @@ static int w25n02kv_ooblayout_free(struct mtd_info *mtd, int section,
 	return 0;
 }
 
+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 const struct mtd_ooblayout_ops w25n01kv_ooblayout = {
 	.ecc = w25n01kv_ooblayout_ecc,
 	.rfree = w25n02kv_ooblayout_free,
@@ -181,6 +211,11 @@ static const struct mtd_ooblayout_ops w25n02kv_ooblayout = {
 	.rfree = w25n02kv_ooblayout_free,
 };
 
+static const struct mtd_ooblayout_ops w25n01jw_ooblayout = {
+	.ecc = w25n01jw_ooblayout_ecc,
+	.rfree = w25n01jw_ooblayout_free,
+};
+
 static int w35n01jw_ooblayout_ecc(struct mtd_info *mtd, int section,
 				  struct mtd_oob_region *region)
 {
@@ -399,7 +434,7 @@ 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