[PATCH 26/30] mtd: spi-nor: winbond: W25Q512JV-M: New chip

From: Miquel Raynal

Date: Fri May 29 2026 - 12:15:47 EST

Add support for W25Q512JV-M. It is a 3.3V chip with usual dual/quad
capabilities.

The SFDP table is pretty complete except for the locking capabilities
which must be filled manually.

Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
---
+ cat /sys/bus/spi/devices/spi0.0/spi-nor/partname
cat: can't open '/sys/bus/spi/devices/spi0.0/spi-nor/partname': No such file or directory
+ cat /sys/bus/spi/devices/spi0.0/spi-nor/jedec_id
ef7020
+ cat /sys/bus/spi/devices/spi0.0/spi-nor/manufacturer
winbond
+ xxd -p /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
53464450060101ff00060110800000ff84000102d00000ff03000102f000
00ffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
ffffffffffffffffe520fbffffffff1f44eb086b083b42bbfeffffffffff
0000ffff40eb0c200f5210d800003602a60082ea14e2e96376337a757a75
f7a2d55c19f74dffe970f9a5ffffffffffffffffffffffffffffffffff0a
f0ff21ffdcff
+ sha256sum /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
f41674a6c3742a42d31d3007d4d4b725c166ddb4e4566d1c347d29ed29855ef0 /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-2S
opcode 0x3c
mode cycles 0
dummy cycles 8
1S-2S-2S
opcode 0xbc
mode cycles 2
dummy cycles 2
1S-1S-4S
opcode 0x6c
mode cycles 0
dummy cycles 8
1S-4S-4S
opcode 0xec
mode cycles 2
dummy cycles 4
4S-4S-4S
opcode 0xec
mode cycles 2
dummy cycles 0

Supported page program modes by the flash
1S-1S-1S
opcode 0x12
1S-1S-4S
opcode 0x34
+ cat /sys/kernel/debug/spi-nor/spi0.0/params
name (null)
id ef 70 20 00 00 00
size 64.0 MiB
write size 1
page size 256
address nbytes 4
flags HAS_SR_TB | 4B_OPCODES | HAS_4BAIT | HAS_LOCK | HAS_16BIT_SR | HAS_SR_TB_BIT6 | HAS_4BIT_BP | SOFT_RESET | NO_WP | HAS_SR2_CMP_BIT6

opcodes
read 0xec
dummy cycles 6
erase 0xdc
program 0x34
8D extension none

protocols
read 1S-4S-4S
write 1S-1S-4S
register 1S-1S-1S

erase commands
21 (4.00 KiB) [1]
dc (64.0 KiB) [3]
c7 (64.0 MiB)

sector map
region (in hex) | erase mask | overlaid
------------------+------------+---------
00000000-03ffffff | [ 3] | no

locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-03ffffff | unlocked | 1024
+ dd 'if=/dev/urandom' 'of=./spi_test' 'bs=1M' 'count=2'
[ 53.198369] 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
f27c6b54ce92a46104f2fd43fc2d6d1353099a6a125591b47a615d3d61171a86 spi_read
f27c6b54ce92a46104f2fd43fc2d6d1353099a6a125591b47a615d3d61171a86 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
f27c6b54ce92a46104f2fd43fc2d6d1353099a6a125591b47a615d3d61171a86 spi_test
+ mtd_debug info /dev/mtd0
mtd.type = MTD_NORFLASH
mtd.flags = MTD_CAP_NORFLASH
mtd.size = 67108864 (64M)
mtd.erasesize = 65536 (64K)
mtd.writesize = 1
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: 0x4000000
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
f27c6b54ce92a46104f2fd43fc2d6d1353099a6a125591b47a615d3d61171a86 spi_read
f27c6b54ce92a46104f2fd43fc2d6d1353099a6a125591b47a615d3d61171a86 spi_test
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-03ffffff | unlocked | 1024
+ flash_lock -l /dev/mtd0
+ flash_lock -i /dev/mtd0
Device: /dev/mtd0
Start: 0
Len: 0x4000000
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
f27c6b54ce92a46104f2fd43fc2d6d1353099a6a125591b47a615d3d61171a86 spi_read
f27c6b54ce92a46104f2fd43fc2d6d1353099a6a125591b47a615d3d61171a86 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
f27c6b54ce92a46104f2fd43fc2d6d1353099a6a125591b47a615d3d61171a86 spi_read
f27c6b54ce92a46104f2fd43fc2d6d1353099a6a125591b47a615d3d61171a86 spi_read2
f27c6b54ce92a46104f2fd43fc2d6d1353099a6a125591b47a615d3d61171a86 spi_test
44db7586d798437868d29ea31ac1fa1e64d1b81337721d0d811776dad47110f3 spi_test2
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-03ffffff | locked | 1024
+ flash_lock -u /dev/mtd0
+ cat /sys/class/mtd/mtd0/size
+ size=67108864
+ cat /sys/class/mtd/mtd0/erasesize
+ bs=65536
+ grep unlocked /sys/kernel/debug/spi-nor/spi0.0/params
+ sed -e 's/.*unlocked | //'
+ nsectors=1024
+ ss=65536
+ bps=1
+ flash_lock -u /dev/mtd0
+ flash_lock -l /dev/mtd0 66977792 2
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-03fdffff | unlocked | 1022
03fe0000-03ffffff | locked | 2
+ flash_lock -u /dev/mtd0 66977792 1
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-03feffff | unlocked | 1023
03ff0000-03ffffff | locked | 1
+ flash_lock -u /dev/mtd0
+ flash_lock -l /dev/mtd0 58720256 128
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-037fffff | unlocked | 896
03800000-03ffffff | locked | 128
+ flash_lock -u /dev/mtd0
+ flash_lock -l /dev/mtd0 0 2
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-0001ffff | locked | 2
00020000-03ffffff | unlocked | 1022
+ flash_lock -u /dev/mtd0 65536 1
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-0000ffff | locked | 1
00010000-03ffffff | unlocked | 1023
+ all_but_one=1023
+ flash_lock -u /dev/mtd0
+ flash_lock -l /dev/mtd0 65536 1023
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-0000ffff | unlocked | 1
00010000-03ffffff | locked | 1023
+ flash_lock -u /dev/mtd0 65536 1
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-0001ffff | unlocked | 2
00020000-03ffffff | locked | 1022
+ flash_lock -u /dev/mtd0
+ flash_lock -l /dev/mtd0 0 1023
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-03feffff | locked | 1023
03ff0000-03ffffff | unlocked | 1
+ flash_lock -u /dev/mtd0 66977792 1
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-03fdffff | locked | 1022
03fe0000-03ffffff | unlocked | 2
+ flash_speed /dev/mtd0 -dc10
not NAND flash, assume page size is 512 bytes.
scanning for bad eraseblocks
scanned 10 eraseblocks, 0 are bad
testing eraseblock write speed
eraseblock write speed is 437 KiB/s
testing eraseblock read speed
eraseblock read speed is 1560 KiB/s
testing page write speed
page write speed is 434 KiB/s
testing page read speed
page read speed is 1457 KiB/s
testing 2 page write speed
2 page write speed is 435 KiB/s
testing 2 page read speed
2 page read speed is 1498 KiB/s
Testing erase speed
erase speed is 257 KiB/s
Testing 2x multi-block erase speed
2x multi-block erase speed is 257 KiB/s
Testing 4x multi-block erase speed
4x multi-block erase speed is 257 KiB/s
Testing 8x multi-block erase speed
8x multi-block erase speed is 254 KiB/s
Testing 16x multi-block erase speed
16x multi-block erase speed is 255 KiB/s
Testing 32x multi-block erase speed
32x multi-block erase speed is 255 KiB/s
Testing 64x multi-block erase speed
64x multi-block erase speed is 253 KiB/s
finished
---
drivers/mtd/spi-nor/winbond.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/drivers/mtd/spi-nor/winbond.c b/drivers/mtd/spi-nor/winbond.c
index ff409fbc2d38..fa842e841804 100644
--- a/drivers/mtd/spi-nor/winbond.c
+++ b/drivers/mtd/spi-nor/winbond.c
@@ -306,6 +306,11 @@ static const struct flash_info winbond_nor_parts[] = {
}, {
/* W25Q256JV-M */
.id = SNOR_ID(0xef, 0x70, 0x19),
+ }, {
+ /* W25Q512JV-M */
+ .id = SNOR_ID(0xef, 0x70, 0x20),
+ .flags = SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB | SPI_NOR_TB_SR_BIT6 |
+ SPI_NOR_4BIT_BP | SPI_NOR_HAS_CMP,
}, {
/* W25Q02JV-M */
.id = SNOR_ID(0xef, 0x70, 0x22),

--
2.53.0