[PATCH 0/2] mtd: spi-nor: spansion: Cleanup S25FS256S

[PATCH 0/2] mtd: spi-nor: spansion: Cleanup S25FS256S

[Takahiro Kuwano via B4 Relay]

This series cleans up the S25FS256S entries in the Spansion ID table.
Remove the invalid s25fs256s0 entry and assign the existing S25FS-S
fixups to s25fs256s1.

Signed-off-by: Takahiro Kuwano <takahiro.kuwano@infineon.com>
---
Takahiro Kuwano (2):
      mtd: spi-nor: spansion: Remove s25fs256s0
      mtd: spi-nor: spansion: Assign .fixups to s25fs256s1

 drivers/mtd/spi-nor/spansion.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)
---
base-commit: eb652d33da1b99c58a1465028b1336af5a3367c5
change-id: 20260911-s25fs256s-fixup-d97a584b1f69

Best regards,
--  
Takahiro Kuwano <takahiro.kuwano@infineon.com>

[PATCH 1/2] mtd: spi-nor: spansion: Remove s25fs256s0

[Takahiro Kuwano via B4 Relay]

From: Takahiro Kuwano <takahiro.kuwano@infineon.com>

The Spansion ID table lists s25fs256s0 and s25fs256s1 as variants
distinguished by id[4] (0x00 for 256 KB sectors and 0x01 for 64 KB
sectors), following an incorrect statement in the datasheet.

The sector size of s25fs256s is configurable between 256 KB and 64 KB.
The factory default is 64 KB, and id[4] is always 0x01 regardless of the
configured sector size. Remove the invalid s25fs256s0 entry from the ID
table.

Fixes: 075fd6dff24a ("mtd: spi-nor: spansion: Differentiate between s25fl256s and s25fs256s")
Signed-off-by: Takahiro Kuwano <takahiro.kuwano@infineon.com>
---
 drivers/mtd/spi-nor/spansion.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/drivers/mtd/spi-nor/spansion.c b/drivers/mtd/spi-nor/spansion.c
index 6938fe26969c..6a62ca6f6451 100644
--- a/drivers/mtd/spi-nor/spansion.c
+++ b/drivers/mtd/spi-nor/spansion.c
@@ -873,13 +873,6 @@ static const struct flash_info spansion_nor_parts[] = {
 		.sector_size = SZ_256K,
 		.no_sfdp_flags = SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ,
 		.mfr_flags = USE_CLSR,
-	}, {
-		.id = SNOR_ID(0x01, 0x02, 0x19, 0x4d, 0x00, 0x81),
-		.name = "s25fs256s0",
-		.size = SZ_32M,
-		.sector_size = SZ_256K,
-		.no_sfdp_flags = SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ,
-		.mfr_flags = USE_CLSR,
 	}, {
 		.id = SNOR_ID(0x01, 0x02, 0x19, 0x4d, 0x01, 0x80),
 		.name = "s25fl256s1",

-- 
2.43.0

[PATCH 2/2] mtd: spi-nor: spansion: Assign .fixups to s25fs256s1

[Takahiro Kuwano via B4 Relay]

From: Takahiro Kuwano <takahiro.kuwano@infineon.com>

s25fs256s1 has incorrect SFDP entries, like s25fs512s and s25fs128s1.
Assign the common s25fs_s_nor_fixups to s25fs256s1 to fix its page size
and sector map.

Signed-off-by: Takahiro Kuwano <takahiro.kuwano@infineon.com>
---
 drivers/mtd/spi-nor/spansion.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mtd/spi-nor/spansion.c b/drivers/mtd/spi-nor/spansion.c
index 6a62ca6f6451..bc50881d5648 100644
--- a/drivers/mtd/spi-nor/spansion.c
+++ b/drivers/mtd/spi-nor/spansion.c
@@ -1148,6 +1148,7 @@ static const struct spi_nor_fixups spansion_nor_fixups = {
 static const struct spi_nor_fixup spansion_fixups[] = {
 	{ .fixups = &spansion_nor_fixups },
 	{ .id = SNOR_ID(0x01, 0x02, 0x20, 0x4d, 0x00, 0x81), .fixups = &s25fs_s_nor_fixups },
+	{ .id = SNOR_ID(0x01, 0x02, 0x19, 0x4d, 0x01, 0x81), .fixups = &s25fs_s_nor_fixups },
 	{ .id = SNOR_ID(0x01, 0x20, 0x18, 0x4d, 0x01, 0x81), .fixups = &s25fs_s_nor_fixups },
 	{ .id = SNOR_ID(0x01, 0x60, 0x17), .fixup_flags = SPI_NOR_4B_OPCODES },
 	{ .id = SNOR_ID(0x01, 0x60, 0x18), .fixup_flags = SPI_NOR_4B_OPCODES },

-- 
2.43.0

Re: [PATCH 2/2] mtd: spi-nor: spansion: Assign .fixups to s25fs256s1

[Michael Walle]

On Mon Sep 14, 2026 at 6:50 AM CEST, Takahiro Kuwano via B4 Relay wrote:
> From: Takahiro Kuwano <takahiro.kuwano@infineon.com>
>
> s25fs256s1 has incorrect SFDP entries, like s25fs512s and s25fs128s1.
> Assign the common s25fs_s_nor_fixups to s25fs256s1 to fix its page size
> and sector map.

Do you have an SFDP dump by chance? I haven't found one on the list
for this flash.

-michael

RE: [PATCH 2/2] mtd: spi-nor: spansion: Assign .fixups to s25fs256s1

[Takahiro.Kuwano]

Hi Michael,

> On Mon Sep 14, 2026 at 6:50 AM CEST, Takahiro Kuwano via B4 Relay wrote:
> > From: Takahiro Kuwano <takahiro.kuwano@infineon.com>
> >
> > s25fs256s1 has incorrect SFDP entries, like s25fs512s and s25fs128s1.
> > Assign the common s25fs_s_nor_fixups to s25fs256s1 to fix its page size
> > and sector map.
> 
> Do you have an SFDP dump by chance? I haven't found one on the list
> for this flash.
> 

Yes, but param tables are located beyond PAGE_SIZE(1000h)...

zynq> cat /sys/bus/spi/devices/spi0.0/spi-nor/partname
s25fs256s1

zynq> cat /sys/bus/spi/devices/spi0.0/spi-nor/jedec_id
0102194d0181

zynq> cat /sys/bus/spi/devices/spi0.0/spi-nor/manufacturer
spansion

zynq> hexdump /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
0000000 4653 5044 0106 ff05 0000 0901 1090 ff00
0000010 0500 1001 1090 ff00 0600 1001 1090 ff00
0000020 0081 1a01 10d8 ff00 0084 0201 10d0 ff00
0000030 0101 5001 1000 0100 ffff ffff ffff ffff
0000040 ffff ffff ffff ffff ffff ffff ffff ffff
*
0001000

Thanks,
Takahiro

Re: [PATCH 2/2] mtd: spi-nor: spansion: Assign .fixups to s25fs256s1

[Michael Walle]

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Hi Takahiro,

On Mon Sep 14, 2026 at 9:11 AM CEST, Takahiro.Kuwano wrote:
> Hi Michael,
>
>> On Mon Sep 14, 2026 at 6:50 AM CEST, Takahiro Kuwano via B4 Relay wrote:
>> > From: Takahiro Kuwano <takahiro.kuwano@infineon.com>
>> >
>> > s25fs256s1 has incorrect SFDP entries, like s25fs512s and s25fs128s1.
>> > Assign the common s25fs_s_nor_fixups to s25fs256s1 to fix its page size
>> > and sector map.
>> 
>> Do you have an SFDP dump by chance? I haven't found one on the list
>> for this flash.
>> 
>
> Yes, but param tables are located beyond PAGE_SIZE(1000h)...

Could you test the following patch if that helps?

--- a/drivers/mtd/spi-nor/sysfs.c
+++ b/drivers/mtd/spi-nor/sysfs.c
@@ -99,10 +99,26 @@ static umode_t spi_nor_sysfs_is_bin_visible(struct kobject *kobj,
 	return 0;
 }

+static size_t spi_nor_sysfs_bin_size(struct kobject *kobj, const struct bin_attribute *attr, int n)
+{
+	struct spi_device *spi = to_spi_device(kobj_to_dev(kobj));
+	struct spi_mem *spimem = spi_get_drvdata(spi);
+	struct spi_nor *nor = spi_mem_get_drvdata(spimem);
+	struct sfdp *sfdp = nor->sfdp;
+	size_t sfdp_size = sfdp->num_dwords * sizeof(*sfdp->dwords);
+
+	if (attr == &bin_attr_sfdp)
+		return sfdp_size;
+
+	return 0;
+}
+
+
 static const struct attribute_group spi_nor_sysfs_group = {
 	.name		= "spi-nor",
 	.is_visible	= spi_nor_sysfs_is_visible,
 	.is_bin_visible	= spi_nor_sysfs_is_bin_visible,
+	.bin_size	= spi_nor_sysfs_bin_size,
 	.attrs		= spi_nor_sysfs_entries,
 	.bin_attrs	= spi_nor_sysfs_bin_entries,
 };

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