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From: Md Sadre Alam <md.alam@oss.qualcomm.com>
To: miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com,
	tudor.ambarus@linaro.org, s-k6@ti.com,
	linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org
Cc: varadarajan.narayanan@oss.qualcomm.com
Subject: [PATCH 1/2] mtd: spinand: winbond: add support for W25N04LW
Date: Fri,  7 Aug 2026 12:13:38 +0530	[thread overview]
Message-ID: <20260807064339.1632249-2-md.alam@oss.qualcomm.com> (raw)
In-Reply-To: <20260807064339.1632249-1-md.alam@oss.qualcomm.com>

Add support for Winbond W25N04LW 4Gbit SPI-NAND.
It has 8-bit on-die ECC and a 4096+256 byte page
(4096 byte main area, 128 byte usable OOB once
on-chip ECC hides the 128 byte parity area),
organized as 2048 blocks of 64 pages each, unlike
the existing 2048 byte page W25N04KV/W25N04KW parts.

Signed-off-by: Md Sadre Alam <md.alam@oss.qualcomm.com>
---
 drivers/mtd/nand/spi/winbond.c | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/drivers/mtd/nand/spi/winbond.c b/drivers/mtd/nand/spi/winbond.c
index 9b78c1e6cbc9..b0147b7cb76f 100644
--- a/drivers/mtd/nand/spi/winbond.c
+++ b/drivers/mtd/nand/spi/winbond.c
@@ -345,6 +345,29 @@ static const struct mtd_ooblayout_ops w25n02kv_ooblayout = {
 	.free = w25n02kv_ooblayout_free,
 };
 
+static int w25n04lw_ooblayout_ecc(struct mtd_info *mtd, int section,
+				  struct mtd_oob_region *region)
+{
+	return -ERANGE;
+}
+
+static int w25n04lw_ooblayout_free(struct mtd_info *mtd, int section,
+				   struct mtd_oob_region *region)
+{
+	if (section)
+		return -ERANGE;
+
+	region->offset = 2;
+	region->length = mtd->oobsize - 2;
+
+	return 0;
+}
+
+static const struct mtd_ooblayout_ops w25n04lw_ooblayout = {
+	.ecc = w25n04lw_ooblayout_ecc,
+	.free = w25n04lw_ooblayout_free,
+};
+
 static int w25n01jw_ooblayout_ecc(struct mtd_info *mtd, int section,
 				  struct mtd_oob_region *region)
 {
@@ -768,6 +791,15 @@ static const struct spinand_info winbond_spinand_table[] = {
 					      &update_cache_variants),
 		     0,
 		     SPINAND_ECCINFO(&w25n02kv_ooblayout, w25n02kv_ecc_get_status)),
+	SPINAND_INFO("W25N04LW", /* 1.8V */
+		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xb2, 0x23),
+		     NAND_MEMORG(1, 4096, 128, 64, 2048, 40, 1, 1, 1),
+		     NAND_ECCREQ(8, 512),
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+					      &write_cache_variants,
+					      &update_cache_variants),
+		     0,
+		     SPINAND_ECCINFO(&w25n04lw_ooblayout, w25n02kv_ecc_get_status)),
 	SPINAND_INFO("W35N04JW", /* 1.8V */
 		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xdf, 0x23),
 		     NAND_MEMORG(1, 4096, 128, 64, 512, 10, 1, 4, 1),
-- 
2.34.1


______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

WARNING: multiple messages have this Message-ID (diff)
From: Md Sadre Alam <md.alam@oss.qualcomm.com>
To: miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com,
	tudor.ambarus@linaro.org, s-k6@ti.com,
	linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org
Cc: varadarajan.narayanan@oss.qualcomm.com
Subject: [PATCH 1/2] mtd: spinand: winbond: add support for W25N04LW
Date: Fri,  7 Aug 2026 12:13:38 +0530	[thread overview]
Message-ID: <20260807064339.1632249-2-md.alam@oss.qualcomm.com> (raw)
In-Reply-To: <20260807064339.1632249-1-md.alam@oss.qualcomm.com>

Add support for Winbond W25N04LW 4Gbit SPI-NAND.
It has 8-bit on-die ECC and a 4096+256 byte page
(4096 byte main area, 128 byte usable OOB once
on-chip ECC hides the 128 byte parity area),
organized as 2048 blocks of 64 pages each, unlike
the existing 2048 byte page W25N04KV/W25N04KW parts.

Signed-off-by: Md Sadre Alam <md.alam@oss.qualcomm.com>
---
 drivers/mtd/nand/spi/winbond.c | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/drivers/mtd/nand/spi/winbond.c b/drivers/mtd/nand/spi/winbond.c
index 9b78c1e6cbc9..b0147b7cb76f 100644
--- a/drivers/mtd/nand/spi/winbond.c
+++ b/drivers/mtd/nand/spi/winbond.c
@@ -345,6 +345,29 @@ static const struct mtd_ooblayout_ops w25n02kv_ooblayout = {
 	.free = w25n02kv_ooblayout_free,
 };
 
+static int w25n04lw_ooblayout_ecc(struct mtd_info *mtd, int section,
+				  struct mtd_oob_region *region)
+{
+	return -ERANGE;
+}
+
+static int w25n04lw_ooblayout_free(struct mtd_info *mtd, int section,
+				   struct mtd_oob_region *region)
+{
+	if (section)
+		return -ERANGE;
+
+	region->offset = 2;
+	region->length = mtd->oobsize - 2;
+
+	return 0;
+}
+
+static const struct mtd_ooblayout_ops w25n04lw_ooblayout = {
+	.ecc = w25n04lw_ooblayout_ecc,
+	.free = w25n04lw_ooblayout_free,
+};
+
 static int w25n01jw_ooblayout_ecc(struct mtd_info *mtd, int section,
 				  struct mtd_oob_region *region)
 {
@@ -768,6 +791,15 @@ static const struct spinand_info winbond_spinand_table[] = {
 					      &update_cache_variants),
 		     0,
 		     SPINAND_ECCINFO(&w25n02kv_ooblayout, w25n02kv_ecc_get_status)),
+	SPINAND_INFO("W25N04LW", /* 1.8V */
+		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xb2, 0x23),
+		     NAND_MEMORG(1, 4096, 128, 64, 2048, 40, 1, 1, 1),
+		     NAND_ECCREQ(8, 512),
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+					      &write_cache_variants,
+					      &update_cache_variants),
+		     0,
+		     SPINAND_ECCINFO(&w25n04lw_ooblayout, w25n02kv_ecc_get_status)),
 	SPINAND_INFO("W35N04JW", /* 1.8V */
 		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xdf, 0x23),
 		     NAND_MEMORG(1, 4096, 128, 64, 512, 10, 1, 4, 1),
-- 
2.34.1


  reply	other threads:[~2026-08-07  6:43 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-08-07  6:43 [PATCH 0/2] mtd: spinand: winbond: add support for additional SPI-NAND devices Md Sadre Alam
2026-08-07  6:43 ` Md Sadre Alam
2026-08-07  6:43 ` Md Sadre Alam [this message]
2026-08-07  6:43   ` [PATCH 1/2] mtd: spinand: winbond: add support for W25N04LW Md Sadre Alam
2026-08-07 13:52   ` Miquel Raynal
2026-08-07 13:52     ` Miquel Raynal
2026-08-10  8:28   ` Dominique MARTINET
2026-08-10  8:28     ` Dominique MARTINET
2026-08-10 12:43     ` Miquel Raynal
2026-08-10 12:43       ` Miquel Raynal
2026-08-11 12:48       ` Md Sadre Alam
2026-08-11 12:48         ` Md Sadre Alam
2026-08-11 12:40     ` Md Sadre Alam
2026-08-11 12:40       ` Md Sadre Alam
2026-08-07  6:43 ` [PATCH 2/2] mtd: spinand: winbond: add support for W25N01KW and W25N02LW Md Sadre Alam
2026-08-07  6:43   ` Md Sadre Alam
2026-08-07 13:50   ` Miquel Raynal
2026-08-07 13:50     ` Miquel Raynal
2026-08-11 12:57     ` Md Sadre Alam
2026-08-11 12:57       ` Md Sadre Alam

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