Initial commit

target/linux/generic/backport-6.6/899-v6.9-mtd-spinand-winbond-add-W25N04KV.patch

@@ -0,0 +1,53 @@
+From e0ccf861b80698a5cc6f97c89bf8d5761f465fce Mon Sep 17 00:00:00 2001
+From: Zhi-Jun You <hujy652@gmail.com>
+Date: Sun, 7 Jan 2024 14:41:20 +0000
+Subject: mtd: spinand: winbond: add support for W25N04KV
+
+Add support for W25N04KV.
+
+W25N04KV has 8-bit on-die ECC.
+
+Signed-off-by: Zhi-Jun You <hujy652@gmail.com>
+Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
+Link: https://lore.kernel.org/linux-mtd/20240107144120.532-1-hujy652@gmail.com
+---
+ drivers/mtd/nand/spi/winbond.c | 12 ++++++++++++
+ 1 file changed, 12 insertions(+)
+
+(limited to 'drivers/mtd/nand/spi/winbond.c')
+
+--- a/drivers/mtd/nand/spi/winbond.c
++++ b/drivers/mtd/nand/spi/winbond.c
+@@ -15,6 +15,8 @@
+ 
+ #define WINBOND_CFG_BUF_READ		BIT(3)
+ 
++#define W25N04KV_STATUS_ECC_5_8_BITFLIPS	(3 << 4)
++
+ static SPINAND_OP_VARIANTS(read_cache_variants,
+ 		SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),
+ 		SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
+@@ -118,6 +120,7 @@ static int w25n02kv_ecc_get_status(struc
+ 		return -EBADMSG;
+ 
+ 	case STATUS_ECC_HAS_BITFLIPS:
++	case W25N04KV_STATUS_ECC_5_8_BITFLIPS:
+ 		/*
+ 		 * Let's try to retrieve the real maximum number of bitflips
+ 		 * in order to avoid forcing the wear-leveling layer to move
+@@ -214,6 +217,15 @@ static const struct spinand_info winbond
+ 					      &update_cache_variants),
+ 		     0,
+ 		     SPINAND_ECCINFO(&w25m02gv_ooblayout, w25n02kv_ecc_get_status)),
++	SPINAND_INFO("W25N04KV",
++		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xaa, 0x23),
++		     NAND_MEMORG(1, 2048, 128, 64, 4096, 40, 2, 1, 1),
++		     NAND_ECCREQ(8, 512),
++		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
++					      &write_cache_variants,
++					      &update_cache_variants),
++		     0,
++		     SPINAND_ECCINFO(&w25n02kv_ooblayout, w25n02kv_ecc_get_status)),
+ };
+ 
+ static int winbond_spinand_init(struct spinand_device *spinand)