[PATCH] mtd: spinand: winbond: add support for W25N04LV

[Huasin Liao]

Add support for the Winbond W25N04LV. Tested on an Airoha
AN7581-based board with the on-board W25N04LV, verified
erase/read/write.

Link: https://www.winbond.com/hq/product/code-storage-flash-memory/qspinand-flash/?__locale=en&partNo=W25N04LV
Cc: huasin.liao at airoha.com
Signed-off-by: Huasin Liao <huasinliao at gmail.com>
---
 drivers/mtd/nand/spi/winbond.c | 38 ++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/drivers/mtd/nand/spi/winbond.c b/drivers/mtd/nand/spi/winbond.c
index 9b78c1e6cbc9..892220a12b22 100644
--- a/drivers/mtd/nand/spi/winbond.c
+++ b/drivers/mtd/nand/spi/winbond.c
@@ -345,6 +345,35 @@ static const struct mtd_ooblayout_ops w25n02kv_ooblayout = {
 	.free = w25n02kv_ooblayout_free,
 };
 
+static int w25n04lv_ooblayout_ecc(struct mtd_info *mtd, int section,
+				  struct mtd_oob_region *region)
+{
+	if (section > 7)
+		return -ERANGE;
+
+	region->offset = 128 + (16 * section);
+	region->length = 13;
+
+	return 0;
+}
+
+static int w25n04lv_ooblayout_free(struct mtd_info *mtd, int section,
+				   struct mtd_oob_region *region)
+{
+	if (section > 7)
+		return -ERANGE;
+
+	region->offset = (16 * section) + 2;
+	region->length = 14;
+
+	return 0;
+}
+
+static const struct mtd_ooblayout_ops w25n04lv_ooblayout = {
+	.ecc = w25n04lv_ooblayout_ecc,
+	.free = w25n04lv_ooblayout_free,
+};
+
 static int w25n01jw_ooblayout_ecc(struct mtd_info *mtd, int section,
 				  struct mtd_oob_region *region)
 {
@@ -759,6 +788,15 @@ static const struct spinand_info winbond_spinand_table[] = {
 					      &update_cache_variants),
 		     0,
 		     SPINAND_ECCINFO(&w25n02kv_ooblayout, w25n02kv_ecc_get_status)),
+	SPINAND_INFO("W25N04LV", /* 3.3V */
+		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x8b, 0x23),
+		     NAND_MEMORG(1, 4096, 256, 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(&w25n04lv_ooblayout, w25n02kv_ecc_get_status)),
 	SPINAND_INFO("W25N04KW", /* 1.8V */
 		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xba, 0x23),
 		     NAND_MEMORG(1, 2048, 128, 64, 4096, 40, 1, 1, 1),
-- 
2.39.3 (Apple Git-146)