[PATCH 10/15] mtd: spi-nor: winbond: Add support for W35T64NW-C
Miquel Raynal
miquel.raynal at bootlin.com
Fri Oct 2 05:21:23 PDT 2026
W35T devices are Winbond new octal DTR capable SPI-NORs.
16 bytes chunks are protected against single errors. In case a
non-aligned write happens, ECC is locally disabled until the next erase.
These chips may leverage lock CMP support, by using a Winbond specific
register instead of SR2 which is gone. This feature is therefore not
supported nor flagged.
Signed-off-by: Miquel Raynal <miquel.raynal at bootlin.com>
---
+ cat /sys/bus/spi/devices/spi0.0/spi-nor/jedec_id
ef5b17
+ cat /sys/bus/spi/devices/spi0.0/spi-nor/manufacturer
winbond
+ xxd -p /sys/bus/spi/devices/spi0.0/spi-nor/sfdp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+ sha256sum /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
30be7c3bf1f6a00ea4e56585dc9c929026555f2e2c16ab5f6fdfbc3819fc0d21 /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
+ cat /sys/kernel/debug/spi-nor/spi0.0/capabilities
Supported read modes by the flash
1S-1S-1S
opcode 0x13
mode cycles 0
dummy cycles 0
1S-1S-8S
opcode 0x7c
mode cycles 0
dummy cycles 8
1S-8S-8S
opcode 0xcc
mode cycles 0
dummy cycles 16
8D-8D-8D
opcode 0x0b
mode cycles 0
dummy cycles 22
Supported page program modes by the flash
1S-1S-1S
opcode 0x12
8D-8D-8D
opcode 0x12
+ cat /sys/kernel/debug/spi-nor/spi0.0/params
name (null)
id ef 5b 17 02 00 00
size 8.00 MiB
write size 16
page size 256
address nbytes 4
flags HAS_SR_TB | 4B_OPCODES | HAS_4BAIT | HAS_LOCK | HAS_SR_TB_BIT6 | IO_MODE_EN_VOLATILE | SOFT_RESET | ECC | NO_WP
opcodes
read 0x0b
dummy cycles 22
erase 0xdc
program 0x12
SR1 read 0x05
SR1 write 0x01
8D extension repeat
protocols
read 8D-8D-8D
write 8D-8D-8D
register 8D-8D-8D
erase commands
21 (4.00 KiB) [1]
5c (32.0 KiB) [2]
dc (64.0 KiB) [3]
c7 (8.00 MiB)
sector map
region (in hex) | erase mask | overlaid
------------------+------------+---------
00000000-007fffff | [ 3] | no
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-007fffff | unlocked | 64
+ dd 'if=/dev/urandom' 'of=./spi_test' 'bs=1M' 'count=2'
[ 24.901260] random: crng init done
2+0 records in
2+0 records out
+ mtd_debug erase /dev/mtd0 0 2097152
Erased 2097152 bytes from address 0x00000000 in flash
+ mtd_debug read /dev/mtd0 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
+ hexdump spi_read
0000000 ffff ffff ffff ffff ffff ffff ffff ffff
*
0200000
+ sha256sum spi_read
4bda3a28f4ffe603c0ec1258c0034d65a1a0d35ab7bd523a834608adabf03cc5 spi_read
+ mtd_debug write /dev/mtd0 0 2097152 spi_test
Copied 2097152 bytes from spi_test to address 0x00000000 in flash
+ mtd_debug read /dev/mtd0 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
+ sha256sum spi_read spi_test
1f43b7c8eba44e56b616e12b515ff61c3d31307e3f9cedab13d3de08c15fb0b8 spi_read
1f43b7c8eba44e56b616e12b515ff61c3d31307e3f9cedab13d3de08c15fb0b8 spi_test
+ mtd_debug erase /dev/mtd0 0 2097152
Erased 2097152 bytes from address 0x00000000 in flash
+ mtd_debug read /dev/mtd0 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
+ sha256sum spi_read spi_test
4bda3a28f4ffe603c0ec1258c0034d65a1a0d35ab7bd523a834608adabf03cc5 spi_read
1f43b7c8eba44e56b616e12b515ff61c3d31307e3f9cedab13d3de08c15fb0b8 spi_test
+ mtd_debug info /dev/mtd0
mtd.type = MTD_NORFLASH
mtd.flags = MTD_CAP_NANDFLASH
mtd.size = 8388608 (8M)
mtd.erasesize = 65536 (64K)
mtd.writesize = 16
mtd.oobsize = 0
regions = 0
+ alias 'show_sectors=grep -A4 "locked sectors" /sys/kernel/debug/spi-nor/spi0.0/params'
+ flash_lock -u /dev/mtd0
+ flash_lock -i /dev/mtd0
Device: /dev/mtd0
Start: 0
Len: 0x800000
Lock status: unlocked
Return code: 0
+ mtd_debug erase /dev/mtd0 0 2097152
Erased 2097152 bytes from address 0x00000000 in flash
+ mtd_debug write /dev/mtd0 0 2097152 spi_test
Copied 2097152 bytes from spi_test to address 0x00000000 in flash
+ mtd_debug read /dev/mtd0 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
+ sha256sum spi_read spi_test
1f43b7c8eba44e56b616e12b515ff61c3d31307e3f9cedab13d3de08c15fb0b8 spi_read
1f43b7c8eba44e56b616e12b515ff61c3d31307e3f9cedab13d3de08c15fb0b8 spi_test
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-007fffff | unlocked | 64
+ flash_lock -l /dev/mtd0
+ flash_lock -i /dev/mtd0
Device: /dev/mtd0
Start: 0
Len: 0x800000
Lock status: locked
Return code: 1
+ mtd_debug erase /dev/mtd0 0 2097152
Erased 2097152 bytes from address 0x00000000 in flash
+ mtd_debug read /dev/mtd0 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
+ sha256sum spi_read spi_test
1f43b7c8eba44e56b616e12b515ff61c3d31307e3f9cedab13d3de08c15fb0b8 spi_read
1f43b7c8eba44e56b616e12b515ff61c3d31307e3f9cedab13d3de08c15fb0b8 spi_test
+ dd 'if=/dev/urandom' 'of=./spi_test2' 'bs=1M' 'count=2'
2+0 records in
2+0 records out
+ mtd_debug write /dev/mtd0 0 2097152 spi_test2
Copied 2097152 bytes from spi_test2 to address 0x00000000 in flash
+ mtd_debug read /dev/mtd0 0 2097152 spi_read2
Copied 2097152 bytes from address 0x00000000 in flash to spi_read2
+ sha256sum spi_read spi_read2 spi_test spi_test2
1f43b7c8eba44e56b616e12b515ff61c3d31307e3f9cedab13d3de08c15fb0b8 spi_read
1f43b7c8eba44e56b616e12b515ff61c3d31307e3f9cedab13d3de08c15fb0b8 spi_read2
1f43b7c8eba44e56b616e12b515ff61c3d31307e3f9cedab13d3de08c15fb0b8 spi_test
731475d3e8b53d9a8c4e86ef609a765a590ac6a325ed450eeec725531ce6734a spi_test2
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-007fffff | locked | 64
+ flash_lock -u /dev/mtd0
+ cat /sys/class/mtd/mtd0/size
+ size=8388608
+ cat /sys/class/mtd/mtd0/erasesize
+ bs=65536
+ grep unlocked /sys/kernel/debug/spi-nor/spi0.0/params
+ sed -e 's/.*unlocked | //'
+ nsectors=64
+ ss=131072
+ bps=2
+ flash_lock -u /dev/mtd0
+ flash_lock -l /dev/mtd0 8126464 4
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-007bffff | unlocked | 62
007c0000-007fffff | locked | 2
+ flash_lock -u /dev/mtd0 8126464 2
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-007dffff | unlocked | 63
007e0000-007fffff | locked | 1
+ flash_lock -u /dev/mtd0
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-007fffff | unlocked | 64
+ flash_lock -u /dev/mtd0
+ flash_lock -l /dev/mtd0 0 4
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-0003ffff | locked | 2
00040000-007fffff | unlocked | 62
+ flash_lock -u /dev/mtd0 131072 2
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-0001ffff | locked | 1
00020000-007fffff | unlocked | 63
---
drivers/mtd/spi-nor/winbond.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/mtd/spi-nor/winbond.c b/drivers/mtd/spi-nor/winbond.c
index d33e693ed711..e1a93f27f24c 100644
--- a/drivers/mtd/spi-nor/winbond.c
+++ b/drivers/mtd/spi-nor/winbond.c
@@ -620,6 +620,10 @@ static const struct flash_info winbond_nor_parts[] = {
.id = SNOR_ID(0xef, 0xa0, 0x22),
.flags = SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB | SPI_NOR_TB_SR_BIT6 |
SPI_NOR_4BIT_BP | SPI_NOR_HAS_CMP,
+ }, {
+ /* W35T64NW-C */
+ .id = SNOR_ID(0xef, 0x5b, 0x17),
+ .flags = SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB | SPI_NOR_TB_SR_BIT6,
}, {
/*
* Catch all entry to make sure all chips solely relying
--
2.55.0
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