openwrt/target/linux/generic/pending-6.6/489-mtd-spinand-winbond-add-support-for-W25N01KV.patch

From 446daf20b0a6790751459cdde0ff9fc8813e54d1 Mon Sep 17 00:00:00 2001
From: Robert Marko <robimarko@gmail.com>
Date: Mon, 29 Jul 2024 14:09:16 +0200
Subject: [PATCH] mtd: spinand: winbond: add support for W25N01KV

Add support for Winbond W25N01KV 1Gbit SPI-NAND.

It has 4-bit on-die ECC.

Signed-off-by: Robert Marko <robimarko@gmail.com>
---
 drivers/mtd/nand/spi/winbond.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

--- a/drivers/mtd/nand/spi/winbond.c
+++ b/drivers/mtd/nand/spi/winbond.c
@@ -76,6 +76,18 @@ static int w25m02gv_select_target(struct
 	return spi_mem_exec_op(spinand->spimem, &op);
 }
 
+static int w25n01kv_ooblayout_ecc(struct mtd_info *mtd, int section,
+				  struct mtd_oob_region *region)
+{
+	if (section > 3)
+		return -ERANGE;
+
+	region->offset = 64 + (8 * section);
+	region->length = 7;
+
+	return 0;
+}
+
 static int w25n02kv_ooblayout_ecc(struct mtd_info *mtd, int section,
 				  struct mtd_oob_region *region)
 {
@@ -100,6 +112,11 @@ static int w25n02kv_ooblayout_free(struc
 	return 0;
 }
 
+static const struct mtd_ooblayout_ops w25n01kv_ooblayout = {
+	.ecc = w25n01kv_ooblayout_ecc,
+	.free = w25n02kv_ooblayout_free,
+};
+
 static const struct mtd_ooblayout_ops w25n02kv_ooblayout = {
 	.ecc = w25n02kv_ooblayout_ecc,
 	.free = w25n02kv_ooblayout_free,
@@ -163,6 +180,15 @@ static const struct spinand_info winbond
 					      &update_cache_variants),
 		     0,
 		     SPINAND_ECCINFO(&w25m02gv_ooblayout, NULL)),
+	SPINAND_INFO("W25N01KV",
+		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xae, 0x21),
+		     NAND_MEMORG(1, 2048, 96, 64, 1024, 20, 1, 1, 1),
+		     NAND_ECCREQ(4, 512),
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+					      &write_cache_variants,
+					      &update_cache_variants),
+		     0,
+		     SPINAND_ECCINFO(&w25n01kv_ooblayout, w25n02kv_ecc_get_status)),
 	SPINAND_INFO("W25N02KV",
 		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xaa, 0x22),
 		     NAND_MEMORG(1, 2048, 128, 64, 2048, 40, 1, 1, 1),