[openwrt/openwrt] generic: 6.6: add Winbond W25N01KV support

[LEDE Commits]

robimarko pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/81481c805aa56f6452d7e7577d42eb6b89a6869d

commit 81481c805aa56f6452d7e7577d42eb6b89a6869d
Author: Robert Marko <robimarko at gmail.com>
AuthorDate: Mon Jul 29 14:40:46 2024 +0200

    generic: 6.6: add Winbond W25N01KV support
    
    It seems that some Xiaomi AX3000T boards changed to using Winbond W25N01KV
    SPI-NAND which is not supported in OpenWrt nor upstream kernel.
    
    So, add a pending patch to support it as upstream supports rest of the KV
    revision models.
    
    Fixes: #16002
    Link: https://github.com/openwrt/openwrt/pull/16088
    Signed-off-by: Robert Marko <robimarko at gmail.com>
---
 ...-spinand-winbond-add-support-for-W25N01KV.patch | 63 ++++++++++++++++++++++
 1 file changed, 63 insertions(+)

diff --git a/target/linux/generic/pending-6.6/489-mtd-spinand-winbond-add-support-for-W25N01KV.patch b/target/linux/generic/pending-6.6/489-mtd-spinand-winbond-add-support-for-W25N01KV.patch
new file mode 100644
index 0000000000..78498af1ce
--- /dev/null
+++ b/target/linux/generic/pending-6.6/489-mtd-spinand-winbond-add-support-for-W25N01KV.patch
@@ -0,0 +1,63 @@
+From 446daf20b0a6790751459cdde0ff9fc8813e54d1 Mon Sep 17 00:00:00 2001
+From: Robert Marko <robimarko at 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 at 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
+@@ -74,6 +74,18 @@ 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)
+ {
+@@ -98,6 +110,11 @@ 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,
+@@ -160,6 +177,15 @@ 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),