kernel: add support for FudanMicro FM25S01A SPI-NAND

Add support for FudanMicro FM25S01A SPI NAND.
Datasheet: http://eng.fmsh.com/nvm/FM25S01A_ds_eng.pdf

Signed-off-by: Tianling Shen <[email protected]>
[add lore.kernel.org link to the patch files]
Signed-off-by: Mikhail Zhilkin <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/19760
(cherry picked from commit a140bcbc7c6e667c0bbf75d53e73660fa12d0ac0)
[drop patches for kernel 6.12, refresh patches]
Signed-off-by: Mikhail Zhilkin <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/19991
Signed-off-by: Hauke Mehrtens <[email protected]>

target/linux/airoha/patches-6.6/901-snand-mtk-bmt-support.patch

@@ -8,7 +8,7 @@
  
  static int spinand_read_reg_op(struct spinand_device *spinand, u8 reg, u8 *val)
  {
-@@ -1351,6 +1352,7 @@ static int spinand_probe(struct spi_mem
+@@ -1352,6 +1353,7 @@ static int spinand_probe(struct spi_mem
  	if (ret)
  		return ret;
  
@@ -16,7 +16,7 @@
  	ret = mtd_device_register(mtd, NULL, 0);
  	if (ret)
  		goto err_spinand_cleanup;
-@@ -1358,6 +1360,7 @@ static int spinand_probe(struct spi_mem
+@@ -1359,6 +1361,7 @@ static int spinand_probe(struct spi_mem
  	return 0;
  
  err_spinand_cleanup:
@@ -24,7 +24,7 @@
  	spinand_cleanup(spinand);
  
  	return ret;
-@@ -1376,6 +1379,7 @@ static int spinand_remove(struct spi_mem
+@@ -1377,6 +1380,7 @@ static int spinand_remove(struct spi_mem
  	if (ret)
  		return ret;
  

target/linux/generic/backport-6.6/419-v6.17-mtd-spinand-add-support-for-FudanMicro-FM25S01A.patch

@@ -0,0 +1,124 @@
+From 5f284dc15ca8695d0394414045ac64616a3b0e69 Mon Sep 17 00:00:00 2001
+From: Tianling Shen <[email protected]>
+Date: Mon, 25 Aug 2025 01:00:13 +0800
+Subject: [PATCH] mtd: spinand: add support for FudanMicro FM25S01A
+
+Add support for FudanMicro FM25S01A SPI NAND.
+Datasheet: http://eng.fmsh.com/nvm/FM25S01A_ds_eng.pdf
+
+Signed-off-by: Tianling Shen <[email protected]>
+Signed-off-by: Miquel Raynal <[email protected]>
+Link: https://lore.kernel.org/linux-mtd/[email protected]
+---
+ drivers/mtd/nand/spi/Makefile |  2 +-
+ drivers/mtd/nand/spi/core.c   |  1 +
+ drivers/mtd/nand/spi/fmsh.c   | 74 +++++++++++++++++++++++++++++++++++
+ include/linux/mtd/spinand.h   |  1 +
+ 4 files changed, 77 insertions(+), 1 deletion(-)
+ create mode 100644 drivers/mtd/nand/spi/fmsh.c
+
+--- a/drivers/mtd/nand/spi/Makefile
++++ b/drivers/mtd/nand/spi/Makefile
+@@ -1,4 +1,4 @@
+ # SPDX-License-Identifier: GPL-2.0
+-spinand-objs := core.o alliancememory.o ato.o esmt.o foresee.o gigadevice.o macronix.o
++spinand-objs := core.o alliancememory.o ato.o esmt.o fmsh.o foresee.o gigadevice.o macronix.o
+ spinand-objs += micron.o paragon.o toshiba.o winbond.o xtx.o
+ obj-$(CONFIG_MTD_SPI_NAND) += spinand.o
+--- a/drivers/mtd/nand/spi/core.c
++++ b/drivers/mtd/nand/spi/core.c
+@@ -943,6 +943,7 @@ static const struct spinand_manufacturer
+ 	&alliancememory_spinand_manufacturer,
+ 	&ato_spinand_manufacturer,
+ 	&esmt_c8_spinand_manufacturer,
++	&fmsh_spinand_manufacturer,
+ 	&foresee_spinand_manufacturer,
+ 	&gigadevice_spinand_manufacturer,
+ 	&macronix_spinand_manufacturer,
+--- /dev/null
++++ b/drivers/mtd/nand/spi/fmsh.c
+@@ -0,0 +1,74 @@
++// SPDX-License-Identifier: GPL-2.0
++/*
++ * Copyright (c) 2020-2021 Rockchip Electronics Co., Ltd.
++ *
++ * Author: Dingqiang Lin <[email protected]>
++ */
++
++#include <linux/device.h>
++#include <linux/kernel.h>
++#include <linux/mtd/spinand.h>
++
++#define SPINAND_MFR_FMSH		0xA1
++
++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),
++		SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0),
++		SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
++		SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
++		SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
++
++static SPINAND_OP_VARIANTS(write_cache_variants,
++		SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
++		SPINAND_PROG_LOAD(true, 0, NULL, 0));
++
++static SPINAND_OP_VARIANTS(update_cache_variants,
++		SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
++		SPINAND_PROG_LOAD(false, 0, NULL, 0));
++
++static int fm25s01a_ooblayout_ecc(struct mtd_info *mtd, int section,
++				  struct mtd_oob_region *region)
++{
++	return -ERANGE;
++}
++
++static int fm25s01a_ooblayout_free(struct mtd_info *mtd, int section,
++				   struct mtd_oob_region *region)
++{
++	if (section)
++		return -ERANGE;
++
++	region->offset = 2;
++	region->length = 62;
++
++	return 0;
++}
++
++static const struct mtd_ooblayout_ops fm25s01a_ooblayout = {
++	.ecc = fm25s01a_ooblayout_ecc,
++	.free = fm25s01a_ooblayout_free,
++};
++
++static const struct spinand_info fmsh_spinand_table[] = {
++	SPINAND_INFO("FM25S01A",
++		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xE4),
++		     NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
++		     NAND_ECCREQ(1, 512),
++		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
++					      &write_cache_variants,
++					      &update_cache_variants),
++		     SPINAND_HAS_QE_BIT,
++		     SPINAND_ECCINFO(&fm25s01a_ooblayout, NULL)),
++};
++
++static const struct spinand_manufacturer_ops fmsh_spinand_manuf_ops = {
++};
++
++const struct spinand_manufacturer fmsh_spinand_manufacturer = {
++	.id = SPINAND_MFR_FMSH,
++	.name = "Fudan Micro",
++	.chips = fmsh_spinand_table,
++	.nchips = ARRAY_SIZE(fmsh_spinand_table),
++	.ops = &fmsh_spinand_manuf_ops,
++};
+--- a/include/linux/mtd/spinand.h
++++ b/include/linux/mtd/spinand.h
+@@ -263,6 +263,7 @@ struct spinand_manufacturer {
+ extern const struct spinand_manufacturer alliancememory_spinand_manufacturer;
+ extern const struct spinand_manufacturer ato_spinand_manufacturer;
+ extern const struct spinand_manufacturer esmt_c8_spinand_manufacturer;
++extern const struct spinand_manufacturer fmsh_spinand_manufacturer;
+ extern const struct spinand_manufacturer foresee_spinand_manufacturer;
+ extern const struct spinand_manufacturer gigadevice_spinand_manufacturer;
+ extern const struct spinand_manufacturer macronix_spinand_manufacturer;

target/linux/generic/pending-6.6/410-mtd-spinand-set-bitflip_threshold-to-75-of-ECC-strength.patch

@@ -53,7 +53,7 @@ Signed-off-by: Daniel Golle <[email protected]>
 
 --- a/drivers/mtd/nand/spi/core.c
 +++ b/drivers/mtd/nand/spi/core.c
-@@ -1290,6 +1290,7 @@ static int spinand_init(struct spinand_d
+@@ -1291,6 +1291,7 @@ static int spinand_init(struct spinand_d
  	/* Propagate ECC information to mtd_info */
  	mtd->ecc_strength = nanddev_get_ecc_conf(nand)->strength;
  	mtd->ecc_step_size = nanddev_get_ecc_conf(nand)->step_size;

target/linux/generic/pending-6.6/487-mtd-spinand-Add-support-for-Etron-EM73D044VCx.patch

@@ -42,9 +42,9 @@ Submitted-by: Daniel Danzberger <[email protected]>
 +++ b/drivers/mtd/nand/spi/Makefile
 @@ -1,4 +1,4 @@
  # SPDX-License-Identifier: GPL-2.0
--spinand-objs := core.o alliancememory.o ato.o esmt.o foresee.o gigadevice.o macronix.o
+-spinand-objs := core.o alliancememory.o ato.o esmt.o fmsh.o foresee.o gigadevice.o macronix.o
 -spinand-objs += micron.o paragon.o toshiba.o winbond.o xtx.o
-+spinand-objs := core.o alliancememory.o ato.o esmt.o etron.o foresee.o gigadevice.o
++spinand-objs := core.o alliancememory.o ato.o esmt.o etron.o fmsh.o foresee.o gigadevice.o
 +spinand-objs += macronix.o micron.o paragon.o toshiba.o winbond.o xtx.o
  obj-$(CONFIG_MTD_SPI_NAND) += spinand.o
 --- a/drivers/mtd/nand/spi/core.c
@@ -54,9 +54,9 @@ Submitted-by: Daniel Danzberger <[email protected]>
  	&ato_spinand_manufacturer,
  	&esmt_c8_spinand_manufacturer,
 +	&etron_spinand_manufacturer,
+ 	&fmsh_spinand_manufacturer,
  	&foresee_spinand_manufacturer,
  	&gigadevice_spinand_manufacturer,
- 	&macronix_spinand_manufacturer,
 --- /dev/null
 +++ b/drivers/mtd/nand/spi/etron.c
 @@ -0,0 +1,98 @@
@@ -165,6 +165,6 @@ Submitted-by: Daniel Danzberger <[email protected]>
  extern const struct spinand_manufacturer ato_spinand_manufacturer;
  extern const struct spinand_manufacturer esmt_c8_spinand_manufacturer;
 +extern const struct spinand_manufacturer etron_spinand_manufacturer;
+ extern const struct spinand_manufacturer fmsh_spinand_manufacturer;
  extern const struct spinand_manufacturer foresee_spinand_manufacturer;
  extern const struct spinand_manufacturer gigadevice_spinand_manufacturer;
- extern const struct spinand_manufacturer macronix_spinand_manufacturer;

target/linux/mediatek/patches-6.6/330-snand-mtk-bmt-support.patch

@@ -8,7 +8,7 @@
  
  static int spinand_read_reg_op(struct spinand_device *spinand, u8 reg, u8 *val)
  {
-@@ -1351,6 +1352,7 @@ static int spinand_probe(struct spi_mem
+@@ -1352,6 +1353,7 @@ static int spinand_probe(struct spi_mem
  	if (ret)
  		return ret;
  
@@ -16,7 +16,7 @@
  	ret = mtd_device_register(mtd, NULL, 0);
  	if (ret)
  		goto err_spinand_cleanup;
-@@ -1358,6 +1360,7 @@ static int spinand_probe(struct spi_mem
+@@ -1359,6 +1361,7 @@ static int spinand_probe(struct spi_mem
  	return 0;
  
  err_spinand_cleanup:
@@ -24,7 +24,7 @@
  	spinand_cleanup(spinand);
  
  	return ret;
-@@ -1376,6 +1379,7 @@ static int spinand_remove(struct spi_mem
+@@ -1377,6 +1380,7 @@ static int spinand_remove(struct spi_mem
  	if (ret)
  		return ret;
  

target/linux/mediatek/patches-6.6/340-mtd-spinand-Add-support-for-the-Fidelix-FM35X1GA.patch

@@ -18,16 +18,16 @@ Signed-off-by: Davide Fioravanti <[email protected]>
 +++ b/drivers/mtd/nand/spi/Makefile
 @@ -1,4 +1,4 @@
  # SPDX-License-Identifier: GPL-2.0
--spinand-objs := core.o alliancememory.o ato.o esmt.o etron.o foresee.o gigadevice.o
-+spinand-objs := core.o alliancememory.o ato.o esmt.o etron.o fidelix.o foresee.o gigadevice.o
+-spinand-objs := core.o alliancememory.o ato.o esmt.o etron.o fmsh.o foresee.o gigadevice.o
++spinand-objs := core.o alliancememory.o ato.o esmt.o etron.o fidelix.o fmsh.o foresee.o gigadevice.o
  spinand-objs += macronix.o micron.o paragon.o toshiba.o winbond.o xtx.o
  obj-$(CONFIG_MTD_SPI_NAND) += spinand.o
 --- a/drivers/mtd/nand/spi/core.c
 +++ b/drivers/mtd/nand/spi/core.c
-@@ -945,6 +945,7 @@ static const struct spinand_manufacturer
- 	&ato_spinand_manufacturer,
+@@ -946,6 +946,7 @@ static const struct spinand_manufacturer
  	&esmt_c8_spinand_manufacturer,
  	&etron_spinand_manufacturer,
+ 	&fmsh_spinand_manufacturer,
 +	&fidelix_spinand_manufacturer,
  	&foresee_spinand_manufacturer,
  	&gigadevice_spinand_manufacturer,
@@ -113,10 +113,10 @@ Signed-off-by: Davide Fioravanti <[email protected]>
 +};
 --- a/include/linux/mtd/spinand.h
 +++ b/include/linux/mtd/spinand.h
-@@ -264,6 +264,7 @@ extern const struct spinand_manufacturer
- extern const struct spinand_manufacturer ato_spinand_manufacturer;
+@@ -265,6 +265,7 @@ extern const struct spinand_manufacturer
  extern const struct spinand_manufacturer esmt_c8_spinand_manufacturer;
  extern const struct spinand_manufacturer etron_spinand_manufacturer;
+ extern const struct spinand_manufacturer fmsh_spinand_manufacturer;
 +extern const struct spinand_manufacturer fidelix_spinand_manufacturer;
  extern const struct spinand_manufacturer foresee_spinand_manufacturer;
  extern const struct spinand_manufacturer gigadevice_spinand_manufacturer;

target/linux/mediatek/patches-6.6/435-drivers-mtd-spinand-Add-calibration-support-for-spin.patch

@@ -11,7 +11,7 @@ Signed-off-by: SkyLake.Huang <[email protected]>
 
 --- a/drivers/mtd/nand/spi/core.c
 +++ b/drivers/mtd/nand/spi/core.c
-@@ -983,6 +983,56 @@ static int spinand_manufacturer_match(st
+@@ -984,6 +984,56 @@ static int spinand_manufacturer_match(st
  	return -ENOTSUPP;
  }
  
@@ -68,7 +68,7 @@ Signed-off-by: SkyLake.Huang <[email protected]>
  static int spinand_id_detect(struct spinand_device *spinand)
  {
  	u8 *id = spinand->id.data;
-@@ -1233,6 +1283,10 @@ static int spinand_init(struct spinand_d
+@@ -1234,6 +1284,10 @@ static int spinand_init(struct spinand_d
  	if (!spinand->scratchbuf)
  		return -ENOMEM;
  

target/linux/mediatek/patches-6.6/436-drivers-mtd-spi-nor-Add-calibration-support-for-spi-.patch

@@ -12,7 +12,7 @@ Signed-off-by: SkyLake.Huang <[email protected]>
 
 --- a/drivers/mtd/nand/spi/core.c
 +++ b/drivers/mtd/nand/spi/core.c
-@@ -1024,7 +1024,10 @@ int spinand_cal_read(void *priv, u32 *ad
+@@ -1025,7 +1025,10 @@ int spinand_cal_read(void *priv, u32 *ad
  	if (ret)
  		return ret;
  

target/linux/mediatek/patches-6.6/960-asus-hack-u-boot-ignore-mtdparts.patch

@@ -29,7 +29,7 @@ Signed-off-by: Daniel Golle <[email protected]>
 
 --- a/drivers/mtd/nand/spi/core.c
 +++ b/drivers/mtd/nand/spi/core.c
-@@ -1445,6 +1445,7 @@ static int spinand_remove(struct spi_mem
+@@ -1446,6 +1446,7 @@ static int spinand_remove(struct spi_mem
  
  static const struct spi_device_id spinand_ids[] = {
  	{ .name = "spi-nand" },
@@ -37,7 +37,7 @@ Signed-off-by: Daniel Golle <[email protected]>
  	{ /* sentinel */ },
  };
  MODULE_DEVICE_TABLE(spi, spinand_ids);
-@@ -1452,6 +1453,7 @@ MODULE_DEVICE_TABLE(spi, spinand_ids);
+@@ -1453,6 +1454,7 @@ MODULE_DEVICE_TABLE(spi, spinand_ids);
  #ifdef CONFIG_OF
  static const struct of_device_id spinand_of_ids[] = {
  	{ .compatible = "spi-nand" },