[PATCH V6 11/15] mtd: spi-nor: Add APIs to set/get nor->params

[Amit Kumar Mahapatra via Alsa-devel <alsa-devel@xxxxxxxxxxxxxxxx>]

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• Subject: [PATCH V6 11/15] mtd: spi-nor: Add APIs to set/get nor->params
• From: Amit Kumar Mahapatra <amit.kumar-mahapatra@xxxxxxx>
• Date: Fri, 10 Mar 2023 23:02:13 +0530
• Cc: git@xxxxxxx, linux-spi@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, joel@xxxxxxxxx, andrew@xxxxxxxx, radu_nicolae.pirea@xxxxxx, nicolas.ferre@xxxxxxxxxxxxx, alexandre.belloni@xxxxxxxxxxx, claudiu.beznea@xxxxxxxxxxxxx, bcm-kernel-feedback-list@xxxxxxxxxxxx, fancer.lancer@xxxxxxxxx, kernel@xxxxxxxxxxxxxx, festevam@xxxxxxxxx, linux-imx@xxxxxxx, jbrunet@xxxxxxxxxxxx, martin.blumenstingl@xxxxxxxxxxxxxx, avifishman70@xxxxxxxxx, tmaimon77@xxxxxxxxx, tali.perry1@xxxxxxxxx, venture@xxxxxxxxxx, yuenn@xxxxxxxxxx, benjaminfair@xxxxxxxxxx, yogeshgaur.83@xxxxxxxxx, konrad.dybcio@xxxxxxxxxxxxxx, alim.akhtar@xxxxxxxxxxx, ldewangan@xxxxxxxxxx, thierry.reding@xxxxxxxxx, jonathanh@xxxxxxxxxx, michal.simek@xxxxxxx, linux-aspeed@xxxxxxxxxxxxxxxx, openbmc@xxxxxxxxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linux-rpi-kernel@xxxxxxxxxxxxxxxxxxx, linux-amlogic@xxxxxxxxxxxxxxxxxxx, linux-mediatek@xxxxxxxxxxxxxxxxxxx, linux-arm-msm@xxxxxxxxxxxxxxx, linux-rockchip@xxxxxxxxxxxxxxxxxxx, linux-samsung-soc@xxxxxxxxxxxxxxx, linux-stm32@xxxxxxxxxxxxxxxxxxxxxxxxxxxx, linux-sunxi@xxxxxxxxxxxxxxx, linux-tegra@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxxxxxx, linux-wpan@xxxxxxxxxxxxxxx, libertas-dev@xxxxxxxxxxxxxxxxxxx, linux-wireless@xxxxxxxxxxxxxxx, linux-mtd@xxxxxxxxxxxxxxxxxxx, lars@xxxxxxxxxx, Michael.Hennerich@xxxxxxxxxx, linux-iio@xxxxxxxxxxxxxxx, michael@xxxxxxxx, palmer@xxxxxxxxxxx, linux-riscv@xxxxxxxxxxxxxxxxxxx, alsa-devel@xxxxxxxxxxxxxxxx, patches@xxxxxxxxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, amitrkcian2002@xxxxxxxxx, amit.kumar-mahapatra@xxxxxxx
• In-reply-to: <20230310173217.3429788-1-amit.kumar-mahapatra@amd.com>
• References: <20230310173217.3429788-1-amit.kumar-mahapatra@amd.com>

Supporting multi-cs in spi-nor would require the *params member of
struct spi_nor to be an array. To make the transition smoother introduced
spi_nor_get_params() & spi_nor_set_params() APIs to get & set nor->params,
added a new local variable (struct spi_nor_flash_parameter *params) to hold
the return value of the spi_nor_get_params() function call and replaced all
nor->params references with the "params".
While adding multi-cs support in further patches the *params member of the
spi_nor structure would be converted to arrays & the "idx" parameter of
the APIs would be used as array index i.e., nor->params[idx].

Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@xxxxxxx>
---
 drivers/mtd/spi-nor/atmel.c      |  17 ++--
 drivers/mtd/spi-nor/core.c       | 129 ++++++++++++++++++++-----------
 drivers/mtd/spi-nor/debugfs.c    |   4 +-
 drivers/mtd/spi-nor/gigadevice.c |   4 +-
 drivers/mtd/spi-nor/issi.c       |  11 ++-
 drivers/mtd/spi-nor/macronix.c   |   6 +-
 drivers/mtd/spi-nor/micron-st.c  |  34 +++++---
 drivers/mtd/spi-nor/otp.c        |  29 ++++---
 drivers/mtd/spi-nor/sfdp.c       |  29 ++++---
 drivers/mtd/spi-nor/spansion.c   |  50 +++++++-----
 drivers/mtd/spi-nor/sst.c        |   7 +-
 drivers/mtd/spi-nor/swp.c        |  22 ++++--
 drivers/mtd/spi-nor/winbond.c    |  10 ++-
 drivers/mtd/spi-nor/xilinx.c     |  18 +++--
 include/linux/mtd/spi-nor.h      |  10 +++
 15 files changed, 254 insertions(+), 126 deletions(-)

diff --git a/drivers/mtd/spi-nor/atmel.c b/drivers/mtd/spi-nor/atmel.c
index 656dd80a0be7..57ca9f5ee205 100644
--- a/drivers/mtd/spi-nor/atmel.c
+++ b/drivers/mtd/spi-nor/atmel.c
@@ -23,10 +23,11 @@ static int at25fs_nor_lock(struct spi_nor *nor, loff_t ofs, uint64_t len)
 
 static int at25fs_nor_unlock(struct spi_nor *nor, loff_t ofs, uint64_t len)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	int ret;
 
 	/* We only support unlocking the whole flash array */
-	if (ofs || len != nor->params->size)
+	if (ofs || len != params->size)
 		return -EINVAL;
 
 	/* Write 0x00 to the status register to disable write protection */
@@ -50,7 +51,9 @@ static const struct spi_nor_locking_ops at25fs_nor_locking_ops = {
 
 static void at25fs_nor_late_init(struct spi_nor *nor)
 {
-	nor->params->locking_ops = &at25fs_nor_locking_ops;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
+	params->locking_ops = &at25fs_nor_locking_ops;
 }
 
 static const struct spi_nor_fixups at25fs_nor_fixups = {
@@ -69,11 +72,12 @@ static const struct spi_nor_fixups at25fs_nor_fixups = {
 static int atmel_nor_set_global_protection(struct spi_nor *nor, loff_t ofs,
 					   uint64_t len, bool is_protect)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	int ret;
 	u8 sr;
 
 	/* We only support locking the whole flash array */
-	if (ofs || len != nor->params->size)
+	if (ofs || len != params->size)
 		return -EINVAL;
 
 	ret = spi_nor_read_sr(nor, nor->bouncebuf);
@@ -131,9 +135,10 @@ static int atmel_nor_global_unprotect(struct spi_nor *nor, loff_t ofs,
 static int atmel_nor_is_global_protected(struct spi_nor *nor, loff_t ofs,
 					 uint64_t len)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	int ret;
 
-	if (ofs >= nor->params->size || (ofs + len) > nor->params->size)
+	if (ofs >= params->size || (ofs + len) > params->size)
 		return -EINVAL;
 
 	ret = spi_nor_read_sr(nor, nor->bouncebuf);
@@ -151,7 +156,9 @@ static const struct spi_nor_locking_ops atmel_nor_global_protection_ops = {
 
 static void atmel_nor_global_protection_late_init(struct spi_nor *nor)
 {
-	nor->params->locking_ops = &atmel_nor_global_protection_ops;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
+	params->locking_ops = &atmel_nor_global_protection_ops;
 }
 
 static const struct spi_nor_fixups atmel_nor_global_protection_fixups = {
diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index 0a78045ca1d9..66b6934b4465 100644
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -448,14 +448,15 @@ int spi_nor_read_id(struct spi_nor *nor, u8 naddr, u8 ndummy, u8 *id,
  */
 int spi_nor_read_sr(struct spi_nor *nor, u8 *sr)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	int ret;
 
 	if (nor->spimem) {
 		struct spi_mem_op op = SPI_NOR_RDSR_OP(sr);
 
 		if (nor->reg_proto == SNOR_PROTO_8_8_8_DTR) {
-			op.addr.nbytes = nor->params->rdsr_addr_nbytes;
-			op.dummy.nbytes = nor->params->rdsr_dummy;
+			op.addr.nbytes = params->rdsr_addr_nbytes;
+			op.dummy.nbytes = params->rdsr_dummy;
 			/*
 			 * We don't want to read only one byte in DTR mode. So,
 			 * read 2 and then discard the second byte.
@@ -596,9 +597,11 @@ int spi_nor_sr_ready(struct spi_nor *nor)
  */
 static int spi_nor_ready(struct spi_nor *nor)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
 	/* Flashes might override the standard routine. */
-	if (nor->params->ready)
-		return nor->params->ready(nor);
+	if (params->ready)
+		return params->ready(nor);
 
 	return spi_nor_sr_ready(nor);
 }
@@ -760,6 +763,7 @@ static int spi_nor_write_sr1_and_check(struct spi_nor *nor, u8 sr1)
  */
 static int spi_nor_write_16bit_sr_and_check(struct spi_nor *nor, u8 sr1)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	int ret;
 	u8 *sr_cr = nor->bouncebuf;
 	u8 cr_written;
@@ -769,7 +773,7 @@ static int spi_nor_write_16bit_sr_and_check(struct spi_nor *nor, u8 sr1)
 		ret = spi_nor_read_cr(nor, &sr_cr[1]);
 		if (ret)
 			return ret;
-	} else if (nor->params->quad_enable) {
+	} else if (params->quad_enable) {
 		/*
 		 * If the Status Register 2 Read command (35h) is not
 		 * supported, we should at least be sure we don't
@@ -777,7 +781,7 @@ static int spi_nor_write_16bit_sr_and_check(struct spi_nor *nor, u8 sr1)
 		 *
 		 * We can safely assume that when the Quad Enable method is
 		 * set, the value of the QE bit is one, as a consequence of the
-		 * nor->params->quad_enable() call.
+		 * params->quad_enable() call.
 		 *
 		 * We can safely assume that the Quad Enable bit is present in
 		 * the Status Register 2 at BIT(1). According to the JESD216
@@ -1048,17 +1052,21 @@ static u8 spi_nor_convert_3to4_erase(u8 opcode)
 
 static bool spi_nor_has_uniform_erase(const struct spi_nor *nor)
 {
-	return !!nor->params->erase_map.uniform_erase_type;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
+	return !!params->erase_map.uniform_erase_type;
 }
 
 static void spi_nor_set_4byte_opcodes(struct spi_nor *nor)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
 	nor->read_opcode = spi_nor_convert_3to4_read(nor->read_opcode);
 	nor->program_opcode = spi_nor_convert_3to4_program(nor->program_opcode);
 	nor->erase_opcode = spi_nor_convert_3to4_erase(nor->erase_opcode);
 
 	if (!spi_nor_has_uniform_erase(nor)) {
-		struct spi_nor_erase_map *map = &nor->params->erase_map;
+		struct spi_nor_erase_map *map = &params->erase_map;
 		struct spi_nor_erase_type *erase;
 		int i;
 
@@ -1095,10 +1103,12 @@ void spi_nor_unlock_and_unprep(struct spi_nor *nor)
 
 static u32 spi_nor_convert_addr(struct spi_nor *nor, loff_t addr)
 {
-	if (!nor->params->convert_addr)
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
+	if (!params->convert_addr)
 		return addr;
 
-	return nor->params->convert_addr(nor, addr);
+	return params->convert_addr(nor, addr);
 }
 
 /*
@@ -1318,7 +1328,8 @@ static int spi_nor_init_erase_cmd_list(struct spi_nor *nor,
 				       struct list_head *erase_list,
 				       u64 addr, u32 len)
 {
-	const struct spi_nor_erase_map *map = &nor->params->erase_map;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+	const struct spi_nor_erase_map *map = &params->erase_map;
 	const struct spi_nor_erase_type *erase, *prev_erase = NULL;
 	struct spi_nor_erase_region *region;
 	struct spi_nor_erase_command *cmd = NULL;
@@ -1746,12 +1757,16 @@ static int spi_nor_write(struct mtd_info *mtd, loff_t to, size_t len,
 	size_t *retlen, const u_char *buf)
 {
 	struct spi_nor *nor = mtd_to_spi_nor(mtd);
+	struct spi_nor_flash_parameter *params;
 	size_t page_offset, page_remain, i;
 	ssize_t ret;
-	u32 page_size = nor->params->page_size;
+	u32 page_size;
 
 	dev_dbg(nor->dev, "to 0x%08x, len %zd\n", (u32)to, len);
 
+	params = spi_nor_get_params(nor, 0);
+	page_size = params->page_size;
+
 	ret = spi_nor_lock_and_prep(nor);
 	if (ret)
 		return ret;
@@ -1903,6 +1918,8 @@ int spi_nor_hwcaps_pp2cmd(u32 hwcaps)
 static int spi_nor_spimem_check_op(struct spi_nor *nor,
 				   struct spi_mem_op *op)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
 	/*
 	 * First test with 4 address bytes. The opcode itself might
 	 * be a 3B addressing opcode but we don't care, because
@@ -1911,7 +1928,7 @@ static int spi_nor_spimem_check_op(struct spi_nor *nor,
 	 */
 	op->addr.nbytes = 4;
 	if (!spi_mem_supports_op(nor->spimem, op)) {
-		if (nor->params->size > SZ_16M)
+		if (params->size > SZ_16M)
 			return -EOPNOTSUPP;
 
 		/* If flash size <= 16MB, 3 address bytes are sufficient */
@@ -1975,7 +1992,7 @@ static int spi_nor_spimem_check_pp(struct spi_nor *nor,
 static void
 spi_nor_spimem_adjust_hwcaps(struct spi_nor *nor, u32 *hwcaps)
 {
-	struct spi_nor_flash_parameter *params = nor->params;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	unsigned int cap;
 
 	/* X-X-X modes are not supported yet, mask them all. */
@@ -2076,6 +2093,7 @@ static int spi_nor_select_read(struct spi_nor *nor,
 			       u32 shared_hwcaps)
 {
 	int cmd, best_match = fls(shared_hwcaps & SNOR_HWCAPS_READ_MASK) - 1;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	const struct spi_nor_read_command *read;
 
 	if (best_match < 0)
@@ -2085,7 +2103,7 @@ static int spi_nor_select_read(struct spi_nor *nor,
 	if (cmd < 0)
 		return -EINVAL;
 
-	read = &nor->params->reads[cmd];
+	read = &params->reads[cmd];
 	nor->read_opcode = read->opcode;
 	nor->read_proto = read->proto;
 
@@ -2106,6 +2124,7 @@ static int spi_nor_select_read(struct spi_nor *nor,
 static int spi_nor_select_pp(struct spi_nor *nor,
 			     u32 shared_hwcaps)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	int cmd, best_match = fls(shared_hwcaps & SNOR_HWCAPS_PP_MASK) - 1;
 	const struct spi_nor_pp_command *pp;
 
@@ -2116,7 +2135,7 @@ static int spi_nor_select_pp(struct spi_nor *nor,
 	if (cmd < 0)
 		return -EINVAL;
 
-	pp = &nor->params->page_programs[cmd];
+	pp = &params->page_programs[cmd];
 	nor->program_opcode = pp->opcode;
 	nor->write_proto = pp->proto;
 	return 0;
@@ -2185,7 +2204,8 @@ spi_nor_select_uniform_erase(struct spi_nor_erase_map *map,
 
 static int spi_nor_select_erase(struct spi_nor *nor)
 {
-	struct spi_nor_erase_map *map = &nor->params->erase_map;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+	struct spi_nor_erase_map *map = &params->erase_map;
 	const struct spi_nor_erase_type *erase = NULL;
 	struct mtd_info *mtd = &nor->mtd;
 	u32 wanted_size = nor->info->sector_size;
@@ -2234,7 +2254,7 @@ static int spi_nor_select_erase(struct spi_nor *nor)
 static int spi_nor_default_setup(struct spi_nor *nor,
 				 const struct spi_nor_hwcaps *hwcaps)
 {
-	struct spi_nor_flash_parameter *params = nor->params;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	u32 ignored_mask, shared_mask;
 	int err;
 
@@ -2294,8 +2314,10 @@ static int spi_nor_default_setup(struct spi_nor *nor,
 
 static int spi_nor_set_addr_nbytes(struct spi_nor *nor)
 {
-	if (nor->params->addr_nbytes) {
-		nor->addr_nbytes = nor->params->addr_nbytes;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
+	if (params->addr_nbytes) {
+		nor->addr_nbytes = params->addr_nbytes;
 	} else if (nor->read_proto == SNOR_PROTO_8_8_8_DTR) {
 		/*
 		 * In 8D-8D-8D mode, one byte takes half a cycle to transfer. So
@@ -2316,7 +2338,7 @@ static int spi_nor_set_addr_nbytes(struct spi_nor *nor)
 		nor->addr_nbytes = 3;
 	}
 
-	if (nor->addr_nbytes == 3 && nor->params->size > 0x1000000) {
+	if (nor->addr_nbytes == 3 && params->size > 0x1000000) {
 		/* enable 4-byte addressing if the device exceeds 16MiB */
 		nor->addr_nbytes = 4;
 	}
@@ -2338,10 +2360,11 @@ static int spi_nor_set_addr_nbytes(struct spi_nor *nor)
 static int spi_nor_setup(struct spi_nor *nor,
 			 const struct spi_nor_hwcaps *hwcaps)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	int ret;
 
-	if (nor->params->setup)
-		ret = nor->params->setup(nor, hwcaps);
+	if (params->setup)
+		ret = params->setup(nor, hwcaps);
 	else
 		ret = spi_nor_default_setup(nor, hwcaps);
 	if (ret)
@@ -2376,7 +2399,7 @@ static void spi_nor_manufacturer_init_params(struct spi_nor *nor)
  */
 static void spi_nor_no_sfdp_init_params(struct spi_nor *nor)
 {
-	struct spi_nor_flash_parameter *params = nor->params;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	struct spi_nor_erase_map *map = &params->erase_map;
 	const u8 no_sfdp_flags = nor->info->no_sfdp_flags;
 	u8 i, erase_mask;
@@ -2501,6 +2524,8 @@ static void spi_nor_init_fixup_flags(struct spi_nor *nor)
  */
 static void spi_nor_late_init_params(struct spi_nor *nor)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
 	if (nor->manufacturer && nor->manufacturer->fixups &&
 	    nor->manufacturer->fixups->late_init)
 		nor->manufacturer->fixups->late_init(nor);
@@ -2515,7 +2540,7 @@ static void spi_nor_late_init_params(struct spi_nor *nor)
 	 * NOR protection support. When locking_ops are not provided, we pick
 	 * the default ones.
 	 */
-	if (nor->flags & SNOR_F_HAS_LOCK && !nor->params->locking_ops)
+	if (nor->flags & SNOR_F_HAS_LOCK && !params->locking_ops)
 		spi_nor_init_default_locking_ops(nor);
 }
 
@@ -2529,12 +2554,13 @@ static void spi_nor_late_init_params(struct spi_nor *nor)
  */
 static void spi_nor_sfdp_init_params_deprecated(struct spi_nor *nor)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	struct spi_nor_flash_parameter sfdp_params;
 
-	memcpy(&sfdp_params, nor->params, sizeof(sfdp_params));
+	memcpy(&sfdp_params, params, sizeof(sfdp_params));
 
 	if (spi_nor_parse_sfdp(nor)) {
-		memcpy(nor->params, &sfdp_params, sizeof(*nor->params));
+		memcpy(params, &sfdp_params, sizeof(*params));
 		nor->flags &= ~SNOR_F_4B_OPCODES;
 	}
 }
@@ -2569,7 +2595,7 @@ static void spi_nor_init_params_deprecated(struct spi_nor *nor)
  */
 static void spi_nor_init_default_params(struct spi_nor *nor)
 {
-	struct spi_nor_flash_parameter *params = nor->params;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	const struct flash_info *info = nor->info;
 	struct device_node *np = spi_nor_get_flash_node(nor);
 
@@ -2655,12 +2681,15 @@ static void spi_nor_init_default_params(struct spi_nor *nor)
  */
 static int spi_nor_init_params(struct spi_nor *nor)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	int ret;
 
-	nor->params = devm_kzalloc(nor->dev, sizeof(*nor->params), GFP_KERNEL);
-	if (!nor->params)
+	params = devm_kzalloc(nor->dev, sizeof(*params), GFP_KERNEL);
+	if (!params)
 		return -ENOMEM;
 
+	spi_nor_set_params(nor, 0, params);
+
 	spi_nor_init_default_params(nor);
 
 	if (nor->info->parse_sfdp) {
@@ -2688,9 +2717,10 @@ static int spi_nor_init_params(struct spi_nor *nor)
  */
 static int spi_nor_octal_dtr_enable(struct spi_nor *nor, bool enable)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	int ret;
 
-	if (!nor->params->octal_dtr_enable)
+	if (!params->octal_dtr_enable)
 		return 0;
 
 	if (!(nor->read_proto == SNOR_PROTO_8_8_8_DTR &&
@@ -2700,7 +2730,7 @@ static int spi_nor_octal_dtr_enable(struct spi_nor *nor, bool enable)
 	if (!(nor->flags & SNOR_F_IO_MODE_EN_VOLATILE))
 		return 0;
 
-	ret = nor->params->octal_dtr_enable(nor, enable);
+	ret = params->octal_dtr_enable(nor, enable);
 	if (ret)
 		return ret;
 
@@ -2720,18 +2750,21 @@ static int spi_nor_octal_dtr_enable(struct spi_nor *nor, bool enable)
  */
 static int spi_nor_quad_enable(struct spi_nor *nor)
 {
-	if (!nor->params->quad_enable)
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
+	if (!params->quad_enable)
 		return 0;
 
 	if (!(spi_nor_get_protocol_width(nor->read_proto) == 4 ||
 	      spi_nor_get_protocol_width(nor->write_proto) == 4))
 		return 0;
 
-	return nor->params->quad_enable(nor);
+	return params->quad_enable(nor);
 }
 
 static int spi_nor_init(struct spi_nor *nor)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	int err;
 
 	err = spi_nor_octal_dtr_enable(nor, true);
@@ -2773,7 +2806,7 @@ static int spi_nor_init(struct spi_nor *nor)
 		 */
 		WARN_ONCE(nor->flags & SNOR_F_BROKEN_RESET,
 			  "enabling reset hack; may not recover from unexpected reboots\n");
-		err = nor->params->set_4byte_addr_mode(nor, true);
+		err = params->set_4byte_addr_mode(nor, true);
 		if (err && err != -ENOTSUPP)
 			return err;
 	}
@@ -2889,12 +2922,14 @@ static void spi_nor_put_device(struct mtd_info *mtd)
 
 void spi_nor_restore(struct spi_nor *nor)
 {
+	struct spi_nor_flash_parameter *params;
 	int ret;
 
 	/* restore the addressing mode */
 	if (nor->addr_nbytes == 4 && !(nor->flags & SNOR_F_4B_OPCODES) &&
 	    nor->flags & SNOR_F_BROKEN_RESET) {
-		ret = nor->params->set_4byte_addr_mode(nor, false);
+		params = spi_nor_get_params(nor, 0);
+		ret = params->set_4byte_addr_mode(nor, false);
 		if (ret)
 			/*
 			 * Do not stop the execution in the hope that the flash
@@ -2966,6 +3001,7 @@ static const struct flash_info *spi_nor_get_flash_info(struct spi_nor *nor,
 
 static void spi_nor_set_mtd_info(struct spi_nor *nor)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	struct mtd_info *mtd = &nor->mtd;
 	struct device *dev = nor->dev;
 
@@ -2981,9 +3017,9 @@ static void spi_nor_set_mtd_info(struct spi_nor *nor)
 		mtd->flags |= MTD_NO_ERASE;
 	else
 		mtd->_erase = spi_nor_erase;
-	mtd->writesize = nor->params->writesize;
-	mtd->writebufsize = nor->params->page_size;
-	mtd->size = nor->params->size;
+	mtd->writesize = params->writesize;
+	mtd->writebufsize = params->page_size;
+	mtd->size = params->size;
 	mtd->_read = spi_nor_read;
 	/* Might be already set by some SST flashes. */
 	if (!mtd->_write)
@@ -3037,7 +3073,7 @@ int spi_nor_scan(struct spi_nor *nor, const char *name,
 	 * We need the bounce buffer early to read/write registers when going
 	 * through the spi-mem layer (buffers have to be DMA-able).
 	 * For spi-mem drivers, we'll reallocate a new buffer if
-	 * nor->params->page_size turns out to be greater than PAGE_SIZE (which
+	 * params->page_size turns out to be greater than PAGE_SIZE (which
 	 * shouldn't happen before long since NOR pages are usually less
 	 * than 1KB) after spi_nor_scan() returns.
 	 */
@@ -3108,13 +3144,14 @@ EXPORT_SYMBOL_GPL(spi_nor_scan);
 
 static int spi_nor_create_read_dirmap(struct spi_nor *nor)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	struct spi_mem_dirmap_info info = {
 		.op_tmpl = SPI_MEM_OP(SPI_MEM_OP_CMD(nor->read_opcode, 0),
 				      SPI_MEM_OP_ADDR(nor->addr_nbytes, 0, 0),
 				      SPI_MEM_OP_DUMMY(nor->read_dummy, 0),
 				      SPI_MEM_OP_DATA_IN(0, NULL, 0)),
 		.offset = 0,
-		.length = nor->params->size,
+		.length = params->size,
 	};
 	struct spi_mem_op *op = &info.op_tmpl;
 
@@ -3139,13 +3176,14 @@ static int spi_nor_create_read_dirmap(struct spi_nor *nor)
 
 static int spi_nor_create_write_dirmap(struct spi_nor *nor)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	struct spi_mem_dirmap_info info = {
 		.op_tmpl = SPI_MEM_OP(SPI_MEM_OP_CMD(nor->program_opcode, 0),
 				      SPI_MEM_OP_ADDR(nor->addr_nbytes, 0, 0),
 				      SPI_MEM_OP_NO_DUMMY,
 				      SPI_MEM_OP_DATA_OUT(0, NULL, 0)),
 		.offset = 0,
-		.length = nor->params->size,
+		.length = params->size,
 	};
 	struct spi_mem_op *op = &info.op_tmpl;
 
@@ -3168,6 +3206,7 @@ static int spi_nor_create_write_dirmap(struct spi_nor *nor)
 
 static int spi_nor_probe(struct spi_mem *spimem)
 {
+	struct spi_nor_flash_parameter *params;
 	struct spi_device *spi = spimem->spi;
 	struct flash_platform_data *data = dev_get_platdata(&spi->dev);
 	struct spi_nor *nor;
@@ -3214,13 +3253,15 @@ static int spi_nor_probe(struct spi_mem *spimem)
 
 	spi_nor_debugfs_register(nor);
 
+	params = spi_nor_get_params(nor, 0);
+
 	/*
 	 * None of the existing parts have > 512B pages, but let's play safe
 	 * and add this logic so that if anyone ever adds support for such
 	 * a NOR we don't end up with buffer overflows.
 	 */
-	if (nor->params->page_size > PAGE_SIZE) {
-		nor->bouncebuf_size = nor->params->page_size;
+	if (params->page_size > PAGE_SIZE) {
+		nor->bouncebuf_size = params->page_size;
 		devm_kfree(nor->dev, nor->bouncebuf);
 		nor->bouncebuf = devm_kmalloc(nor->dev,
 					      nor->bouncebuf_size,
diff --git a/drivers/mtd/spi-nor/debugfs.c b/drivers/mtd/spi-nor/debugfs.c
index 845b78c7ecc7..1ba86fc6166a 100644
--- a/drivers/mtd/spi-nor/debugfs.c
+++ b/drivers/mtd/spi-nor/debugfs.c
@@ -73,7 +73,7 @@ static void spi_nor_print_flags(struct seq_file *s, unsigned long flags,
 static int spi_nor_params_show(struct seq_file *s, void *data)
 {
 	struct spi_nor *nor = s->private;
-	struct spi_nor_flash_parameter *params = nor->params;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	struct spi_nor_erase_map *erase_map = &params->erase_map;
 	struct spi_nor_erase_region *region;
 	const struct flash_info *info = nor->info;
@@ -181,7 +181,7 @@ static void spi_nor_print_pp_cmd(struct seq_file *s,
 static int spi_nor_capabilities_show(struct seq_file *s, void *data)
 {
 	struct spi_nor *nor = s->private;
-	struct spi_nor_flash_parameter *params = nor->params;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	u32 hwcaps = params->hwcaps.mask;
 	int i, cmd;
 
diff --git a/drivers/mtd/spi-nor/gigadevice.c b/drivers/mtd/spi-nor/gigadevice.c
index d57ddaf1525b..643f131d3916 100644
--- a/drivers/mtd/spi-nor/gigadevice.c
+++ b/drivers/mtd/spi-nor/gigadevice.c
@@ -13,6 +13,8 @@ gd25q256_post_bfpt(struct spi_nor *nor,
 		   const struct sfdp_parameter_header *bfpt_header,
 		   const struct sfdp_bfpt *bfpt)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
 	/*
 	 * GD25Q256C supports the first version of JESD216 which does not define
 	 * the Quad Enable methods. Overwrite the default Quad Enable method.
@@ -24,7 +26,7 @@ gd25q256_post_bfpt(struct spi_nor *nor,
 	 */
 	if (bfpt_header->major == SFDP_JESD216_MAJOR &&
 	    bfpt_header->minor == SFDP_JESD216_MINOR)
-		nor->params->quad_enable = spi_nor_sr1_bit6_quad_enable;
+		params->quad_enable = spi_nor_sr1_bit6_quad_enable;
 
 	return 0;
 }
diff --git a/drivers/mtd/spi-nor/issi.c b/drivers/mtd/spi-nor/issi.c
index 400e2b42f45a..7785ba347526 100644
--- a/drivers/mtd/spi-nor/issi.c
+++ b/drivers/mtd/spi-nor/issi.c
@@ -13,6 +13,8 @@ is25lp256_post_bfpt_fixups(struct spi_nor *nor,
 			   const struct sfdp_parameter_header *bfpt_header,
 			   const struct sfdp_bfpt *bfpt)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
 	/*
 	 * IS25LP256 supports 4B opcodes, but the BFPT advertises
 	 * BFPT_DWORD1_ADDRESS_BYTES_3_ONLY.
@@ -20,7 +22,7 @@ is25lp256_post_bfpt_fixups(struct spi_nor *nor,
 	 */
 	if ((bfpt->dwords[SFDP_DWORD(1)] & BFPT_DWORD1_ADDRESS_BYTES_MASK) ==
 		BFPT_DWORD1_ADDRESS_BYTES_3_ONLY)
-		nor->params->addr_nbytes = 4;
+		params->addr_nbytes = 4;
 
 	return 0;
 }
@@ -31,7 +33,8 @@ static const struct spi_nor_fixups is25lp256_fixups = {
 
 static void pm25lv_nor_late_init(struct spi_nor *nor)
 {
-	struct spi_nor_erase_map *map = &nor->params->erase_map;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+	struct spi_nor_erase_map *map = &params->erase_map;
 	int i;
 
 	/* The PM25LV series has a different 4k sector erase opcode */
@@ -91,7 +94,9 @@ static const struct flash_info issi_nor_parts[] = {
 
 static void issi_nor_default_init(struct spi_nor *nor)
 {
-	nor->params->quad_enable = spi_nor_sr1_bit6_quad_enable;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
+	params->quad_enable = spi_nor_sr1_bit6_quad_enable;
 }
 
 static const struct spi_nor_fixups issi_fixups = {
diff --git a/drivers/mtd/spi-nor/macronix.c b/drivers/mtd/spi-nor/macronix.c
index 6853ec9ae65d..85d3f5b04f74 100644
--- a/drivers/mtd/spi-nor/macronix.c
+++ b/drivers/mtd/spi-nor/macronix.c
@@ -104,8 +104,10 @@ static const struct flash_info macronix_nor_parts[] = {
 
 static void macronix_nor_default_init(struct spi_nor *nor)
 {
-	nor->params->quad_enable = spi_nor_sr1_bit6_quad_enable;
-	nor->params->set_4byte_addr_mode = spi_nor_set_4byte_addr_mode;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
+	params->quad_enable = spi_nor_sr1_bit6_quad_enable;
+	params->set_4byte_addr_mode = spi_nor_set_4byte_addr_mode;
 }
 
 static const struct spi_nor_fixups macronix_nor_fixups = {
diff --git a/drivers/mtd/spi-nor/micron-st.c b/drivers/mtd/spi-nor/micron-st.c
index 7bb86df52f0b..b93e16094b6c 100644
--- a/drivers/mtd/spi-nor/micron-st.c
+++ b/drivers/mtd/spi-nor/micron-st.c
@@ -49,10 +49,11 @@
 
 static int micron_st_nor_octal_dtr_en(struct spi_nor *nor)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	struct spi_mem_op op;
 	u8 *buf = nor->bouncebuf;
 	int ret;
-	u8 addr_mode_nbytes = nor->params->addr_mode_nbytes;
+	u8 addr_mode_nbytes = params->addr_mode_nbytes;
 
 	/* Use 20 dummy cycles for memory array reads. */
 	*buf = 20;
@@ -128,27 +129,31 @@ static int micron_st_nor_octal_dtr_enable(struct spi_nor *nor, bool enable)
 
 static void mt35xu512aba_default_init(struct spi_nor *nor)
 {
-	nor->params->octal_dtr_enable = micron_st_nor_octal_dtr_enable;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
+	params->octal_dtr_enable = micron_st_nor_octal_dtr_enable;
 }
 
 static void mt35xu512aba_post_sfdp_fixup(struct spi_nor *nor)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
 	/* Set the Fast Read settings. */
-	nor->params->hwcaps.mask |= SNOR_HWCAPS_READ_8_8_8_DTR;
-	spi_nor_set_read_settings(&nor->params->reads[SNOR_CMD_READ_8_8_8_DTR],
+	params->hwcaps.mask |= SNOR_HWCAPS_READ_8_8_8_DTR;
+	spi_nor_set_read_settings(&params->reads[SNOR_CMD_READ_8_8_8_DTR],
 				  0, 20, SPINOR_OP_MT_DTR_RD,
 				  SNOR_PROTO_8_8_8_DTR);
 
 	nor->cmd_ext_type = SPI_NOR_EXT_REPEAT;
-	nor->params->rdsr_dummy = 8;
-	nor->params->rdsr_addr_nbytes = 0;
+	params->rdsr_dummy = 8;
+	params->rdsr_addr_nbytes = 0;
 
 	/*
 	 * The BFPT quad enable field is set to a reserved value so the quad
 	 * enable function is ignored by spi_nor_parse_bfpt(). Make sure we
 	 * disable it.
 	 */
-	nor->params->quad_enable = NULL;
+	params->quad_enable = NULL;
 }
 
 static const struct spi_nor_fixups mt35xu512aba_fixups = {
@@ -336,14 +341,15 @@ static int micron_st_nor_set_4byte_addr_mode(struct spi_nor *nor, bool enable)
  */
 static int micron_st_nor_read_fsr(struct spi_nor *nor, u8 *fsr)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	int ret;
 
 	if (nor->spimem) {
 		struct spi_mem_op op = MICRON_ST_RDFSR_OP(fsr);
 
 		if (nor->reg_proto == SNOR_PROTO_8_8_8_DTR) {
-			op.addr.nbytes = nor->params->rdsr_addr_nbytes;
-			op.dummy.nbytes = nor->params->rdsr_dummy;
+			op.addr.nbytes = params->rdsr_addr_nbytes;
+			op.dummy.nbytes = params->rdsr_dummy;
 			/*
 			 * We don't want to read only one byte in DTR mode. So,
 			 * read 2 and then discard the second byte.
@@ -446,16 +452,20 @@ static int micron_st_nor_ready(struct spi_nor *nor)
 
 static void micron_st_nor_default_init(struct spi_nor *nor)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
 	nor->flags |= SNOR_F_HAS_LOCK;
 	nor->flags &= ~SNOR_F_HAS_16BIT_SR;
-	nor->params->quad_enable = NULL;
-	nor->params->set_4byte_addr_mode = micron_st_nor_set_4byte_addr_mode;
+	params->quad_enable = NULL;
+	params->set_4byte_addr_mode = micron_st_nor_set_4byte_addr_mode;
 }
 
 static void micron_st_nor_late_init(struct spi_nor *nor)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
 	if (nor->info->mfr_flags & USE_FSR)
-		nor->params->ready = micron_st_nor_ready;
+		params->ready = micron_st_nor_ready;
 }
 
 static const struct spi_nor_fixups micron_st_nor_fixups = {
diff --git a/drivers/mtd/spi-nor/otp.c b/drivers/mtd/spi-nor/otp.c
index 3d75899de303..5b0319ea7f96 100644
--- a/drivers/mtd/spi-nor/otp.c
+++ b/drivers/mtd/spi-nor/otp.c
@@ -19,7 +19,9 @@
  */
 static inline unsigned int spi_nor_otp_region_len(struct spi_nor *nor)
 {
-	return nor->params->otp.org->len;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
+	return params->otp.org->len;
 }
 
 /**
@@ -30,7 +32,9 @@ static inline unsigned int spi_nor_otp_region_len(struct spi_nor *nor)
  */
 static inline unsigned int spi_nor_otp_n_regions(struct spi_nor *nor)
 {
-	return nor->params->otp.org->n_regions;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
+	return params->otp.org->n_regions;
 }
 
 /**
@@ -241,7 +245,8 @@ int spi_nor_otp_is_locked_sr2(struct spi_nor *nor, unsigned int region)
 
 static loff_t spi_nor_otp_region_start(const struct spi_nor *nor, unsigned int region)
 {
-	const struct spi_nor_otp_organization *org = nor->params->otp.org;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+	const struct spi_nor_otp_organization *org = params->otp.org;
 
 	return org->base + region * org->offset;
 }
@@ -266,7 +271,8 @@ static int spi_nor_mtd_otp_info(struct mtd_info *mtd, size_t len,
 				size_t *retlen, struct otp_info *buf)
 {
 	struct spi_nor *nor = mtd_to_spi_nor(mtd);
-	const struct spi_nor_otp_ops *ops = nor->params->otp.ops;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+	const struct spi_nor_otp_ops *ops = params->otp.ops;
 	unsigned int n_regions = spi_nor_otp_n_regions(nor);
 	unsigned int i;
 	int ret, locked;
@@ -303,7 +309,8 @@ static int spi_nor_mtd_otp_info(struct mtd_info *mtd, size_t len,
 static int spi_nor_mtd_otp_range_is_locked(struct spi_nor *nor, loff_t ofs,
 					   size_t len)
 {
-	const struct spi_nor_otp_ops *ops = nor->params->otp.ops;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+	const struct spi_nor_otp_ops *ops = params->otp.ops;
 	unsigned int region;
 	int locked;
 
@@ -328,7 +335,8 @@ static int spi_nor_mtd_otp_read_write(struct mtd_info *mtd, loff_t ofs,
 				      const u8 *buf, bool is_write)
 {
 	struct spi_nor *nor = mtd_to_spi_nor(mtd);
-	const struct spi_nor_otp_ops *ops = nor->params->otp.ops;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+	const struct spi_nor_otp_ops *ops = params->otp.ops;
 	const size_t rlen = spi_nor_otp_region_len(nor);
 	loff_t rstart, rofs;
 	unsigned int region;
@@ -414,7 +422,8 @@ static int spi_nor_mtd_otp_write(struct mtd_info *mtd, loff_t to, size_t len,
 static int spi_nor_mtd_otp_erase(struct mtd_info *mtd, loff_t from, size_t len)
 {
 	struct spi_nor *nor = mtd_to_spi_nor(mtd);
-	const struct spi_nor_otp_ops *ops = nor->params->otp.ops;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+	const struct spi_nor_otp_ops *ops = params->otp.ops;
 	const size_t rlen = spi_nor_otp_region_len(nor);
 	unsigned int region;
 	loff_t rstart;
@@ -467,7 +476,8 @@ static int spi_nor_mtd_otp_erase(struct mtd_info *mtd, loff_t from, size_t len)
 static int spi_nor_mtd_otp_lock(struct mtd_info *mtd, loff_t from, size_t len)
 {
 	struct spi_nor *nor = mtd_to_spi_nor(mtd);
-	const struct spi_nor_otp_ops *ops = nor->params->otp.ops;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+	const struct spi_nor_otp_ops *ops = params->otp.ops;
 	const size_t rlen = spi_nor_otp_region_len(nor);
 	unsigned int region;
 	int ret;
@@ -501,9 +511,10 @@ static int spi_nor_mtd_otp_lock(struct mtd_info *mtd, loff_t from, size_t len)
 
 void spi_nor_set_mtd_otp_ops(struct spi_nor *nor)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	struct mtd_info *mtd = &nor->mtd;
 
-	if (!nor->params->otp.ops)
+	if (!params->otp.ops)
 		return;
 
 	if (WARN_ON(!is_power_of_2(spi_nor_otp_region_len(nor))))
diff --git a/drivers/mtd/spi-nor/sfdp.c b/drivers/mtd/spi-nor/sfdp.c
index 298ab5e53a8c..da96d3d27cb4 100644
--- a/drivers/mtd/spi-nor/sfdp.c
+++ b/drivers/mtd/spi-nor/sfdp.c
@@ -431,7 +431,7 @@ static void spi_nor_regions_sort_erase_types(struct spi_nor_erase_map *map)
 static int spi_nor_parse_bfpt(struct spi_nor *nor,
 			      const struct sfdp_parameter_header *bfpt_header)
 {
-	struct spi_nor_flash_parameter *params = nor->params;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	struct spi_nor_erase_map *map = &params->erase_map;
 	struct spi_nor_erase_type *erase_type = map->erase_type;
 	struct sfdp_bfpt bfpt;
@@ -645,6 +645,8 @@ static int spi_nor_parse_bfpt(struct spi_nor *nor,
  */
 static u8 spi_nor_smpt_addr_nbytes(const struct spi_nor *nor, const u32 settings)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
 	switch (settings & SMPT_CMD_ADDRESS_LEN_MASK) {
 	case SMPT_CMD_ADDRESS_LEN_0:
 		return 0;
@@ -654,7 +656,7 @@ static u8 spi_nor_smpt_addr_nbytes(const struct spi_nor *nor, const u32 settings
 		return 4;
 	case SMPT_CMD_ADDRESS_LEN_USE_CURRENT:
 	default:
-		return nor->params->addr_mode_nbytes;
+		return params->addr_mode_nbytes;
 	}
 }
 
@@ -806,7 +808,8 @@ spi_nor_region_check_overlay(struct spi_nor_erase_region *region,
 static int spi_nor_init_non_uniform_erase_map(struct spi_nor *nor,
 					      const u32 *smpt)
 {
-	struct spi_nor_erase_map *map = &nor->params->erase_map;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+	struct spi_nor_erase_map *map = &params->erase_map;
 	struct spi_nor_erase_type *erase = map->erase_type;
 	struct spi_nor_erase_region *region;
 	u64 offset;
@@ -894,6 +897,7 @@ static int spi_nor_init_non_uniform_erase_map(struct spi_nor *nor,
 static int spi_nor_parse_smpt(struct spi_nor *nor,
 			      const struct sfdp_parameter_header *smpt_header)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	const u32 *sector_map;
 	u32 *smpt;
 	size_t len;
@@ -924,7 +928,7 @@ static int spi_nor_parse_smpt(struct spi_nor *nor,
 	if (ret)
 		goto out;
 
-	spi_nor_regions_sort_erase_types(&nor->params->erase_map);
+	spi_nor_regions_sort_erase_types(&params->erase_map);
 	/* fall through */
 out:
 	kfree(smpt);
@@ -964,7 +968,7 @@ static int spi_nor_parse_4bait(struct spi_nor *nor,
 		{ 0u /* not used */,		BIT(11) },
 		{ 0u /* not used */,		BIT(12) },
 	};
-	struct spi_nor_flash_parameter *params = nor->params;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	struct spi_nor_pp_command *params_pp = params->page_programs;
 	struct spi_nor_erase_map *map = &params->erase_map;
 	struct spi_nor_erase_type *erase_type = map->erase_type;
@@ -1127,6 +1131,7 @@ static int spi_nor_parse_4bait(struct spi_nor *nor,
 static int spi_nor_parse_profile1(struct spi_nor *nor,
 				  const struct sfdp_parameter_header *profile1_header)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	u32 *dwords, addr;
 	size_t len;
 	int ret;
@@ -1149,14 +1154,14 @@ static int spi_nor_parse_profile1(struct spi_nor *nor,
 
 	 /* Set the Read Status Register dummy cycles and dummy address bytes. */
 	if (dwords[SFDP_DWORD(1)] & PROFILE1_DWORD1_RDSR_DUMMY)
-		nor->params->rdsr_dummy = 8;
+		params->rdsr_dummy = 8;
 	else
-		nor->params->rdsr_dummy = 4;
+		params->rdsr_dummy = 4;
 
 	if (dwords[SFDP_DWORD(1)] & PROFILE1_DWORD1_RDSR_ADDR_BYTES)
-		nor->params->rdsr_addr_nbytes = 4;
+		params->rdsr_addr_nbytes = 4;
 	else
-		nor->params->rdsr_addr_nbytes = 0;
+		params->rdsr_addr_nbytes = 0;
 
 	/*
 	 * We don't know what speed the controller is running at. Find the
@@ -1185,8 +1190,8 @@ static int spi_nor_parse_profile1(struct spi_nor *nor,
 	dummy = round_up(dummy, 2);
 
 	/* Update the fast read settings. */
-	nor->params->hwcaps.mask |= SNOR_HWCAPS_READ_8_8_8_DTR;
-	spi_nor_set_read_settings(&nor->params->reads[SNOR_CMD_READ_8_8_8_DTR],
+	params->hwcaps.mask |= SNOR_HWCAPS_READ_8_8_8_DTR;
+	spi_nor_set_read_settings(&params->reads[SNOR_CMD_READ_8_8_8_DTR],
 				  0, dummy, opcode,
 				  SNOR_PROTO_8_8_8_DTR);
 
@@ -1194,7 +1199,7 @@ static int spi_nor_parse_profile1(struct spi_nor *nor,
 	 * Page Program is "Required Command" in the xSPI Profile 1.0. Update
 	 * the params->hwcaps.mask here.
 	 */
-	nor->params->hwcaps.mask |= SNOR_HWCAPS_PP_8_8_8_DTR;
+	params->hwcaps.mask |= SNOR_HWCAPS_PP_8_8_8_DTR;
 
 out:
 	kfree(dwords);
diff --git a/drivers/mtd/spi-nor/spansion.c b/drivers/mtd/spi-nor/spansion.c
index 12a256c0ef4c..fe3293c597c9 100644
--- a/drivers/mtd/spi-nor/spansion.c
+++ b/drivers/mtd/spi-nor/spansion.c
@@ -51,10 +51,11 @@
 
 static int cypress_nor_octal_dtr_en(struct spi_nor *nor)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	struct spi_mem_op op;
 	u8 *buf = nor->bouncebuf;
 	int ret;
-	u8 addr_mode_nbytes = nor->params->addr_mode_nbytes;
+	u8 addr_mode_nbytes = params->addr_mode_nbytes;
 
 	/* Use 24 dummy cycles for memory array reads. */
 	*buf = SPINOR_REG_CYPRESS_CFR2_MEMLAT_11_24;
@@ -141,8 +142,9 @@ static int cypress_nor_octal_dtr_dis(struct spi_nor *nor)
  */
 static int cypress_nor_quad_enable_volatile(struct spi_nor *nor)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	struct spi_mem_op op;
-	u8 addr_mode_nbytes = nor->params->addr_mode_nbytes;
+	u8 addr_mode_nbytes = params->addr_mode_nbytes;
 	u8 cfr1v_written;
 	int ret;
 
@@ -200,8 +202,9 @@ static int cypress_nor_quad_enable_volatile(struct spi_nor *nor)
  */
 static int cypress_nor_set_page_size(struct spi_nor *nor)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	struct spi_mem_op op =
-		CYPRESS_NOR_RD_ANY_REG_OP(nor->params->addr_mode_nbytes,
+		CYPRESS_NOR_RD_ANY_REG_OP(params->addr_mode_nbytes,
 					  SPINOR_REG_CYPRESS_CFR3V,
 					  nor->bouncebuf);
 	int ret;
@@ -211,9 +214,9 @@ static int cypress_nor_set_page_size(struct spi_nor *nor)
 		return ret;
 
 	if (nor->bouncebuf[0] & SPINOR_REG_CYPRESS_CFR3_PGSZ)
-		nor->params->page_size = 512;
+		params->page_size = 512;
 	else
-		nor->params->page_size = 256;
+		params->page_size = 256;
 
 	return 0;
 }
@@ -223,16 +226,19 @@ s25hx_t_post_bfpt_fixup(struct spi_nor *nor,
 			const struct sfdp_parameter_header *bfpt_header,
 			const struct sfdp_bfpt *bfpt)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
 	/* Replace Quad Enable with volatile version */
-	nor->params->quad_enable = cypress_nor_quad_enable_volatile;
+	params->quad_enable = cypress_nor_quad_enable_volatile;
 
 	return cypress_nor_set_page_size(nor);
 }
 
 static void s25hx_t_post_sfdp_fixup(struct spi_nor *nor)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	struct spi_nor_erase_type *erase_type =
-					nor->params->erase_map.erase_type;
+					params->erase_map.erase_type;
 	unsigned int i;
 
 	/*
@@ -255,7 +261,7 @@ static void s25hx_t_post_sfdp_fixup(struct spi_nor *nor)
 
 static void s25hx_t_late_init(struct spi_nor *nor)
 {
-	struct spi_nor_flash_parameter *params = nor->params;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 
 	/* Fast Read 4B requires mode cycles */
 	params->reads[SNOR_CMD_READ_FAST].num_mode_clocks = 8;
@@ -288,22 +294,24 @@ static int cypress_nor_octal_dtr_enable(struct spi_nor *nor, bool enable)
 
 static void s28hx_t_post_sfdp_fixup(struct spi_nor *nor)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
 	/*
 	 * On older versions of the flash the xSPI Profile 1.0 table has the
 	 * 8D-8D-8D Fast Read opcode as 0x00. But it actually should be 0xEE.
 	 */
-	if (nor->params->reads[SNOR_CMD_READ_8_8_8_DTR].opcode == 0)
-		nor->params->reads[SNOR_CMD_READ_8_8_8_DTR].opcode =
+	if (params->reads[SNOR_CMD_READ_8_8_8_DTR].opcode == 0)
+		params->reads[SNOR_CMD_READ_8_8_8_DTR].opcode =
 			SPINOR_OP_CYPRESS_RD_FAST;
 
 	/* This flash is also missing the 4-byte Page Program opcode bit. */
-	spi_nor_set_pp_settings(&nor->params->page_programs[SNOR_CMD_PP],
+	spi_nor_set_pp_settings(&params->page_programs[SNOR_CMD_PP],
 				SPINOR_OP_PP_4B, SNOR_PROTO_1_1_1);
 	/*
 	 * Since xSPI Page Program opcode is backward compatible with
 	 * Legacy SPI, use Legacy SPI opcode there as well.
 	 */
-	spi_nor_set_pp_settings(&nor->params->page_programs[SNOR_CMD_PP_8_8_8_DTR],
+	spi_nor_set_pp_settings(&params->page_programs[SNOR_CMD_PP_8_8_8_DTR],
 				SPINOR_OP_PP_4B, SNOR_PROTO_8_8_8_DTR);
 
 	/*
@@ -311,7 +319,7 @@ static void s28hx_t_post_sfdp_fixup(struct spi_nor *nor)
 	 * address bytes needed for Read Status Register command as 0 but the
 	 * actual value for that is 4.
 	 */
-	nor->params->rdsr_addr_nbytes = 4;
+	params->rdsr_addr_nbytes = 4;
 }
 
 static int s28hx_t_post_bfpt_fixup(struct spi_nor *nor,
@@ -323,8 +331,10 @@ static int s28hx_t_post_bfpt_fixup(struct spi_nor *nor,
 
 static void s28hx_t_late_init(struct spi_nor *nor)
 {
-	nor->params->octal_dtr_enable = cypress_nor_octal_dtr_enable;
-	nor->params->writesize = 16;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
+	params->octal_dtr_enable = cypress_nor_octal_dtr_enable;
+	params->writesize = 16;
 }
 
 static const struct spi_nor_fixups s28hx_t_fixups = {
@@ -338,13 +348,15 @@ s25fs_s_nor_post_bfpt_fixups(struct spi_nor *nor,
 			     const struct sfdp_parameter_header *bfpt_header,
 			     const struct sfdp_bfpt *bfpt)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
 	/*
 	 * The S25FS-S chip family reports 512-byte pages in BFPT but
 	 * in reality the write buffer still wraps at the safe default
 	 * of 256 bytes.  Overwrite the page size advertised by BFPT
 	 * to get the writes working.
 	 */
-	nor->params->page_size = 256;
+	params->page_size = 256;
 
 	return 0;
 }
@@ -546,7 +558,9 @@ static int spansion_nor_sr_ready_and_clear(struct spi_nor *nor)
 
 static void spansion_nor_late_init(struct spi_nor *nor)
 {
-	if (nor->params->size > SZ_16M) {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
+	if (params->size > SZ_16M) {
 		nor->flags |= SNOR_F_4B_OPCODES;
 		/* No small sector erase for 4-byte command set */
 		nor->erase_opcode = SPINOR_OP_SE;
@@ -554,7 +568,7 @@ static void spansion_nor_late_init(struct spi_nor *nor)
 	}
 
 	if (nor->info->mfr_flags & USE_CLSR)
-		nor->params->ready = spansion_nor_sr_ready_and_clear;
+		params->ready = spansion_nor_sr_ready_and_clear;
 }
 
 static const struct spi_nor_fixups spansion_nor_fixups = {
diff --git a/drivers/mtd/spi-nor/sst.c b/drivers/mtd/spi-nor/sst.c
index 63bcc97bf978..6b91a32804ad 100644
--- a/drivers/mtd/spi-nor/sst.c
+++ b/drivers/mtd/spi-nor/sst.c
@@ -20,10 +20,11 @@ static int sst26vf_nor_lock(struct spi_nor *nor, loff_t ofs, uint64_t len)
 
 static int sst26vf_nor_unlock(struct spi_nor *nor, loff_t ofs, uint64_t len)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	int ret;
 
 	/* We only support unlocking the entire flash array. */
-	if (ofs != 0 || len != nor->params->size)
+	if (ofs != 0 || len != params->size)
 		return -EINVAL;
 
 	ret = spi_nor_read_cr(nor, nor->bouncebuf);
@@ -51,7 +52,9 @@ static const struct spi_nor_locking_ops sst26vf_nor_locking_ops = {
 
 static void sst26vf_nor_late_init(struct spi_nor *nor)
 {
-	nor->params->locking_ops = &sst26vf_nor_locking_ops;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
+	params->locking_ops = &sst26vf_nor_locking_ops;
 }
 
 static const struct spi_nor_fixups sst26vf_nor_fixups = {
diff --git a/drivers/mtd/spi-nor/swp.c b/drivers/mtd/spi-nor/swp.c
index 1f178313ba8f..88eaed2c40fe 100644
--- a/drivers/mtd/spi-nor/swp.c
+++ b/drivers/mtd/spi-nor/swp.c
@@ -340,11 +340,14 @@ static const struct spi_nor_locking_ops spi_nor_sr_locking_ops = {
 
 void spi_nor_init_default_locking_ops(struct spi_nor *nor)
 {
-	nor->params->locking_ops = &spi_nor_sr_locking_ops;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
+	params->locking_ops = &spi_nor_sr_locking_ops;
 }
 
 static int spi_nor_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
 {
+	struct spi_nor_flash_parameter *params;
 	struct spi_nor *nor = mtd_to_spi_nor(mtd);
 	int ret;
 
@@ -352,7 +355,8 @@ static int spi_nor_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
 	if (ret)
 		return ret;
 
-	ret = nor->params->locking_ops->lock(nor, ofs, len);
+	params = spi_nor_get_params(nor, 0);
+	ret = params->locking_ops->lock(nor, ofs, len);
 
 	spi_nor_unlock_and_unprep(nor);
 	return ret;
@@ -360,6 +364,7 @@ static int spi_nor_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
 
 static int spi_nor_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
 {
+	struct spi_nor_flash_parameter *params;
 	struct spi_nor *nor = mtd_to_spi_nor(mtd);
 	int ret;
 
@@ -367,7 +372,8 @@ static int spi_nor_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
 	if (ret)
 		return ret;
 
-	ret = nor->params->locking_ops->unlock(nor, ofs, len);
+	params = spi_nor_get_params(nor, 0);
+	ret = params->locking_ops->unlock(nor, ofs, len);
 
 	spi_nor_unlock_and_unprep(nor);
 	return ret;
@@ -375,6 +381,7 @@ static int spi_nor_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
 
 static int spi_nor_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len)
 {
+	struct spi_nor_flash_parameter *params;
 	struct spi_nor *nor = mtd_to_spi_nor(mtd);
 	int ret;
 
@@ -382,7 +389,8 @@ static int spi_nor_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len)
 	if (ret)
 		return ret;
 
-	ret = nor->params->locking_ops->is_locked(nor, ofs, len);
+	params = spi_nor_get_params(nor, 0);
+	ret = params->locking_ops->is_locked(nor, ofs, len);
 
 	spi_nor_unlock_and_unprep(nor);
 	return ret;
@@ -402,6 +410,7 @@ static int spi_nor_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len)
  */
 void spi_nor_try_unlock_all(struct spi_nor *nor)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	int ret;
 
 	if (!(nor->flags & SNOR_F_HAS_LOCK))
@@ -409,16 +418,17 @@ void spi_nor_try_unlock_all(struct spi_nor *nor)
 
 	dev_dbg(nor->dev, "Unprotecting entire flash array\n");
 
-	ret = spi_nor_unlock(&nor->mtd, 0, nor->params->size);
+	ret = spi_nor_unlock(&nor->mtd, 0, params->size);
 	if (ret)
 		dev_dbg(nor->dev, "Failed to unlock the entire flash memory array\n");
 }
 
 void spi_nor_set_mtd_locking_ops(struct spi_nor *nor)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	struct mtd_info *mtd = &nor->mtd;
 
-	if (!nor->params->locking_ops)
+	if (!params->locking_ops)
 		return;
 
 	mtd->_lock = spi_nor_lock;
diff --git a/drivers/mtd/spi-nor/winbond.c b/drivers/mtd/spi-nor/winbond.c
index ca39acf4112c..ce321e40d2f4 100644
--- a/drivers/mtd/spi-nor/winbond.c
+++ b/drivers/mtd/spi-nor/winbond.c
@@ -218,13 +218,17 @@ static const struct spi_nor_otp_ops winbond_nor_otp_ops = {
 
 static void winbond_nor_default_init(struct spi_nor *nor)
 {
-	nor->params->set_4byte_addr_mode = winbond_nor_set_4byte_addr_mode;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
+	params->set_4byte_addr_mode = winbond_nor_set_4byte_addr_mode;
 }
 
 static void winbond_nor_late_init(struct spi_nor *nor)
 {
-	if (nor->params->otp.org->n_regions)
-		nor->params->otp.ops = &winbond_nor_otp_ops;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
+	if (params->otp.org->n_regions)
+		params->otp.ops = &winbond_nor_otp_ops;
 }
 
 static const struct spi_nor_fixups winbond_nor_fixups = {
diff --git a/drivers/mtd/spi-nor/xilinx.c b/drivers/mtd/spi-nor/xilinx.c
index 5723157739fc..6c5da0e0f9a4 100644
--- a/drivers/mtd/spi-nor/xilinx.c
+++ b/drivers/mtd/spi-nor/xilinx.c
@@ -55,7 +55,8 @@ static const struct flash_info xilinx_nor_parts[] = {
  */
 static u32 s3an_nor_convert_addr(struct spi_nor *nor, u32 addr)
 {
-	u32 page_size = nor->params->page_size;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+	u32 page_size = params->page_size;
 	u32 offset, page;
 
 	offset = addr % page_size;
@@ -115,6 +116,7 @@ static int xilinx_nor_sr_ready(struct spi_nor *nor)
 static int xilinx_nor_setup(struct spi_nor *nor,
 			    const struct spi_nor_hwcaps *hwcaps)
 {
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
 	u32 page_size;
 	int ret;
 
@@ -140,14 +142,14 @@ static int xilinx_nor_setup(struct spi_nor *nor,
 	 */
 	if (nor->bouncebuf[0] & XSR_PAGESIZE) {
 		/* Flash in Power of 2 mode */
-		page_size = (nor->params->page_size == 264) ? 256 : 512;
-		nor->params->page_size = page_size;
+		page_size = (params->page_size == 264) ? 256 : 512;
+		params->page_size = page_size;
 		nor->mtd.writebufsize = page_size;
-		nor->params->size = 8 * page_size * nor->info->n_sectors;
+		params->size = 8 * page_size * nor->info->n_sectors;
 		nor->mtd.erasesize = 8 * page_size;
 	} else {
 		/* Flash in Default addressing mode */
-		nor->params->convert_addr = s3an_nor_convert_addr;
+		params->convert_addr = s3an_nor_convert_addr;
 		nor->mtd.erasesize = nor->info->sector_size;
 	}
 
@@ -156,8 +158,10 @@ static int xilinx_nor_setup(struct spi_nor *nor,
 
 static void xilinx_nor_late_init(struct spi_nor *nor)
 {
-	nor->params->setup = xilinx_nor_setup;
-	nor->params->ready = xilinx_nor_sr_ready;
+	struct spi_nor_flash_parameter *params = spi_nor_get_params(nor, 0);
+
+	params->setup = xilinx_nor_setup;
+	params->ready = xilinx_nor_sr_ready;
 }
 
 static const struct spi_nor_fixups xilinx_nor_fixups = {
diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h
index a3f8cdca90c8..338b73125131 100644
--- a/include/linux/mtd/spi-nor.h
+++ b/include/linux/mtd/spi-nor.h
@@ -420,6 +420,16 @@ static inline struct device_node *spi_nor_get_flash_node(struct spi_nor *nor)
 	return mtd_get_of_node(&nor->mtd);
 }
 
+static inline struct spi_nor_flash_parameter *spi_nor_get_params(const struct spi_nor *nor, u8 idx)
+{
+	return nor->params;
+}
+
+static inline void spi_nor_set_params(struct spi_nor *nor, u8 idx,
+				      struct spi_nor_flash_parameter *params)
+{
+	nor->params = params;
+}
 /**
  * spi_nor_scan() - scan the SPI NOR
  * @nor:	the spi_nor structure
-- 
2.25.1

--- End Message ---