[PATCH 04/25] mtd: spi-nor: winbond: W25Q64xW-Q/N: Fill locking information
From: Miquel Raynal
Date: Wed Sep 09 2026 - 12:13:53 EST
The SFDP table does not advertize the locking capabilities of the
device, flag the missing capabilities.
This feature is identical across the various datasheets exposing the
same ID, however I could only test it on the JW-Q variant.
Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
---
+ 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
5571f5b1deca4414397a96746a87a77ddbe37381cdfc8b104638763d72fa04f1 spi_read
5571f5b1deca4414397a96746a87a77ddbe37381cdfc8b104638763d72fa04f1 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
5571f5b1deca4414397a96746a87a77ddbe37381cdfc8b104638763d72fa04f1 spi_read
5571f5b1deca4414397a96746a87a77ddbe37381cdfc8b104638763d72fa04f1 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
5571f5b1deca4414397a96746a87a77ddbe37381cdfc8b104638763d72fa04f1 spi_read
5571f5b1deca4414397a96746a87a77ddbe37381cdfc8b104638763d72fa04f1 spi_read2
5571f5b1deca4414397a96746a87a77ddbe37381cdfc8b104638763d72fa04f1 spi_test
896f1008afff470b95ada9696d79308125a86a6e72fe6f0106b1df93a874aca4 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
+ 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
+ all_but_one=126
+ flash_lock -u /dev/mtd0
+ flash_lock -l /dev/mtd0 131072 126
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-0001ffff | unlocked | 1
00020000-007fffff | locked | 63
+ 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
------------------+----------+---------
00000000-0003ffff | unlocked | 2
00040000-007fffff | locked | 62
+ flash_lock -u /dev/mtd0
+ flash_lock -l /dev/mtd0 0 126
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-007dffff | locked | 63
007e0000-007fffff | unlocked | 1
+ 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
------------------+----------+---------
00000000-007bffff | locked | 62
007c0000-007fffff | unlocked | 2
---
drivers/mtd/spi-nor/winbond.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/mtd/spi-nor/winbond.c b/drivers/mtd/spi-nor/winbond.c
index fe541c6fd939..7097948e7dba 100644
--- a/drivers/mtd/spi-nor/winbond.c
+++ b/drivers/mtd/spi-nor/winbond.c
@@ -334,7 +334,7 @@ static const struct flash_info winbond_nor_parts[] = {
.id = SNOR_ID(0xef, 0x60, 0x17),
.name = "w25q64dw",
.size = SZ_8M,
- .flags = SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB,
+ .flags = SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB | SPI_NOR_HAS_CMP,
.no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ,
}, {
/* W25Q128FW-G/Q, W25Q128JW-Q/N */
--
2.54.0