[PATCH 06/30] mtd: spi-nor: winbond: W25Q64JV-Q/N: Drop redundant data
From: Miquel Raynal
Date: Fri May 29 2026 - 11:55:20 EST
This chip has correct SFDP support, all fields are correctly filled so
we can drop them from the table:
$ cat /sys/kernel/debug/spi-nor/spi0.0/params
name (null)
id ef 40 17 00 00 00
size 8.00 MiB
write size 1
page size 256
address nbytes 3
flags HAS_16BIT_SR | SOFT_RESET | NO_WP
opcodes
read 0xeb
dummy cycles 6
erase 0xd8
program 0x02
8D extension none
protocols
read 1S-4S-4S
write 1S-1S-1S
register 1S-1S-1S
erase commands
20 (4.00 KiB) [1]
52 (32.0 KiB) [2]
d8 (64.0 KiB) [3]
c7 (8.00 MiB)
sector map
region (in hex) | erase mask | overlaid
------------------+------------+---------
00000000-007fffff | [ 3] | no
$ cat /sys/kernel/debug/spi-nor/spi0.0/capabilities
Supported read modes by the flash
1S-1S-1S
opcode 0x03
mode cycles 0
dummy cycles 0
1S-1S-2S
opcode 0x3b
mode cycles 0
dummy cycles 8
1S-2S-2S
opcode 0xbb
mode cycles 2
dummy cycles 2
1S-1S-4S
opcode 0x6b
mode cycles 0
dummy cycles 8
1S-4S-4S
opcode 0xeb
mode cycles 2
dummy cycles 4
4S-4S-4S
opcode 0xeb
mode cycles 2
dummy cycles 0
Supported page program modes by the flash
1S-1S-1S
opcode 0x02
Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
---
$ cat /sys/bus/spi/devices/spi0.0/spi-nor/jedec_id
ef4017
$ cat /sys/bus/spi/devices/spi0.0/spi-nor/manufacturer
winbond
$ xxd -p /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
53464450050100ff00050110800000ffffffffffffffffffffffffffffff
ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
ffffffffffffffffe520f9ffffffff0344eb086b083b42bbfeffffffffff
0000ffff40eb0c200f5210d800003602a60082ea14c4e96376337a757a75
f7a2d55c19f74dffe930f880
$ sha256sum /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
ad4c59a94e6205cf237f8734d01ca45d67d34ed35404b364595ff420b6259d32 /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
$ cat /sys/kernel/debug/spi-nor/spi0.0/params
name (null)
id ef 40 17 00 00 00
size 8.00 MiB
write size 1
page size 256
address nbytes 3
flags HAS_16BIT_SR | SOFT_RESET | NO_WP
opcodes
read 0xeb
dummy cycles 6
erase 0xd8
program 0x02
8D extension none
protocols
read 1S-4S-4S
write 1S-1S-1S
register 1S-1S-1S
erase commands
20 (4.00 KiB) [1]
52 (32.0 KiB) [2]
d8 (64.0 KiB) [3]
c7 (8.00 MiB)
sector map
region (in hex) | erase mask | overlaid
------------------+------------+---------
00000000-007fffff | [ 3] | no
$ cat /sys/kernel/debug/spi-nor/spi0.0/capabilities
Supported read modes by the flash
1S-1S-1S
opcode 0x03
mode cycles 0
dummy cycles 0
1S-1S-2S
opcode 0x3b
mode cycles 0
dummy cycles 8
1S-2S-2S
opcode 0xbb
mode cycles 2
dummy cycles 2
1S-1S-4S
opcode 0x6b
mode cycles 0
dummy cycles 8
1S-4S-4S
opcode 0xeb
mode cycles 2
dummy cycles 4
4S-4S-4S
opcode 0xeb
mode cycles 2
dummy cycles 0
Supported page program modes by the flash
1S-1S-1S
opcode 0x02
---
drivers/mtd/spi-nor/winbond.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/drivers/mtd/spi-nor/winbond.c b/drivers/mtd/spi-nor/winbond.c
index 524c4ae565c2..738303821857 100644
--- a/drivers/mtd/spi-nor/winbond.c
+++ b/drivers/mtd/spi-nor/winbond.c
@@ -203,8 +203,6 @@ static const struct flash_info winbond_nor_parts[] = {
}, {
/* W25Q64JV-Q/N */
.id = SNOR_ID(0xef, 0x40, 0x17),
- .size = SZ_8M,
- .no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ,
}, {
/* W25Q128JV-Q/N */
.id = SNOR_ID(0xef, 0x40, 0x18),
--
2.53.0