Yes this is correct. I have a patch to have it recognized
--- a/drivers/mtd/spi-nor/Makefile
+++ b/drivers/mtd/spi-nor/Makefile
@@ -6,6 +6,7 @@ spi-nor-objs += catalyst.o
spi-nor-objs += eon.o
spi-nor-objs += esmt.o
spi-nor-objs += everspin.o
+spi-nor-objs += fudan.o
spi-nor-objs += fujitsu.o
spi-nor-objs += gigadevice.o
spi-nor-objs += intel.o
--- a/drivers/mtd/spi-nor/core.h
+++ b/drivers/mtd/spi-nor/core.h
@@ -477,6 +477,7 @@ extern const struct spi_nor_manufacturer
extern const struct spi_nor_manufacturer spi_nor_eon;
extern const struct spi_nor_manufacturer spi_nor_esmt;
extern const struct spi_nor_manufacturer spi_nor_everspin;
+extern const struct spi_nor_manufacturer spi_nor_fudan;
extern const struct spi_nor_manufacturer spi_nor_fujitsu;
extern const struct spi_nor_manufacturer spi_nor_gigadevice;
extern const struct spi_nor_manufacturer spi_nor_intel;
--- /dev/null
+++ b/drivers/mtd/spi-nor/fudan.c
@@ -0,0 +1,16 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/mtd/spi-nor.h>
+
+#include "core.h"
+
+static const struct flash_info fudan_parts[] = {
+ /* Shanghai Fudan Microlectronics -- fn25xxx */
+ { "fm25q128", INFO(0xa14018, 0, 64 * 1024, 256, 0) },
+};
+
+const struct spi_nor_manufacturer spi_nor_fudan = {
+ .name = "fudan",
+ .parts = fudan_parts,
+ .nparts = ARRAY_SIZE(fudan_parts),
+};
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -1847,6 +1847,7 @@ static const struct spi_nor_manufacturer
&spi_nor_eon,
&spi_nor_esmt,
&spi_nor_everspin,
+ &spi_nor_fudan,
&spi_nor_fujitsu,
&spi_nor_gigadevice,
&spi_nor_intel