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@@ -0,0 +1,76 @@
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+From c5b3dd3b860b7eb65950c077a70b2e5ad68626b0 Mon Sep 17 00:00:00 2001
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+From: Mikhail Zhilkin <[email protected]>
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+Date: Wed, 13 Aug 2025 21:54:49 +0300
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+Subject: uboot-mediatek: add support for FudanMicro FM25S01A
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+
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+This patch adds support for FudanMicro FM25S01A SPI NAND. It's required
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+for some CMCC RAX3000Me hardware revisions.
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+
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+The patch was partially taken from ImmortalWrt.
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+Link:
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+https://raw.githubusercontent.com/immortalwrt/immortalwrt/refs/heads/master/package/boot/uboot-mediatek/patches/342-mtd-spinand-Support-fmsh.patch
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+
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+Signed-off-by: Mikhail Zhilkin <[email protected]>
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+---
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+
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+--- a/drivers/mtd/nand/spi/fudanmicro.c
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++++ b/drivers/mtd/nand/spi/fudanmicro.c
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+@@ -27,6 +27,29 @@ static SPINAND_OP_VARIANTS(update_cache_
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+ SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
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+ SPINAND_PROG_LOAD(false, 0, NULL, 0));
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+
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++static int fm25s01a_ooblayout_ecc(struct mtd_info *mtd, int section,
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++ struct mtd_oob_region *region)
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++{
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++ return -ERANGE;
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++}
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++
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++static int fm25s01a_ooblayout_free(struct mtd_info *mtd, int section,
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++ struct mtd_oob_region *region)
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++{
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++ if (section)
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++ return -ERANGE;
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++
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++ region->offset = 2;
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++ region->length = 62;
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++
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++ return 0;
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++}
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++
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++static const struct mtd_ooblayout_ops fm25s01a_ooblayout = {
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++ .ecc = fm25s01a_ooblayout_ecc,
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++ .rfree = fm25s01a_ooblayout_free,
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++};
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++
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+ static int fm25s01b_ooblayout_ecc(struct mtd_info *mtd, int section,
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+ struct mtd_oob_region *region)
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+ {
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+@@ -83,8 +106,17 @@ static int fm25s01b_ecc_get_status(struc
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+ }
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+
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+ static const struct spinand_info fudan_spinand_table[] = {
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+- SPINAND_INFO("FM25s01B",
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+- SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xD4),
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++ SPINAND_INFO("FM25S01A",
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++ SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xE4),
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++ NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
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++ NAND_ECCREQ(1, 512),
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++ SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
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++ &write_cache_variants,
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++ &update_cache_variants),
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++ 0,
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++ SPINAND_ECCINFO(&fm25s01a_ooblayout, NULL)),
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++ SPINAND_INFO("FM25S01B",
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++ SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xD4),
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+ NAND_MEMORG(1, 2048, 128, 64, 1024, 20, 1, 1, 1),
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+ NAND_ECCREQ(8, 512),
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+ SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
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+@@ -100,7 +132,7 @@ static const struct spinand_manufacturer
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+
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+ const struct spinand_manufacturer fudan_spinand_manufacturer = {
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+ .id = SPINAND_MFR_FUDAN,
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+- .name = "FUDAN Micron",
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++ .name = "FudanMicro",
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+ .chips = fudan_spinand_table,
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+ .nchips = ARRAY_SIZE(fudan_spinand_table),
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+ .ops = &fudan_spinand_manuf_ops,
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Mikhail Zhilkin