generic: 5.15: add Winbond W25N01KV support

It seems that some Xiaomi AX3000T boards changed to using Winbond W25N01KV
SPI-NAND which is not supported in OpenWrt 23.05 but only in main.

So, backport the support for Winbond W25N01KV from Linux 6.12 to 23.05
as well.

Link: https://github.com/openwrt/openwrt/pull/16669
Signed-off-by: Robert Marko <robimarko@gmail.com>

diff --git a/target/linux/generic/backport-5.15/893-v6.12-mtd-spinand-winbond-add-support-for-W25N01KV.patch b/target/linux/generic/backport-5.15/893-v6.12-mtd-spinand-winbond-add-support-for-W25N01KV.patch
new file mode 100644 (file)
index 0000000..49ac690
--- /dev/null
+++ b/target/linux/generic/backport-5.15/893-v6.12-mtd-spinand-winbond-add-support-for-W25N01KV.patch
@@ -0,0 +1,65 @@
+From e2a9fcb36e851adb5b25c4acea53a290fd48a636 Mon Sep 17 00:00:00 2001
+From: Robert Marko <robimarko@gmail.com>
+Date: Mon, 5 Aug 2024 19:51:02 +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>
+Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
+Link: https://lore.kernel.org/linux-mtd/20240805175125.6658-1-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
+@@ -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),