[PATCH 12/30] mtd: spi-nor: winbond: W25Q64JV-Q/N: Fill locking information
From: Miquel Raynal
Date: Fri May 29 2026 - 11:37:13 EST
The SFDP table does not advertize the locking capabilities of the
device, flag these capabilities.
Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
---
+ dd 'if=/dev/urandom' 'of=./spi_test' 'bs=1M' 'count=2'
2+0 records in
2+0 records out
+ 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
a4ad2c0352f71d61f64ed9cabb705edc84ac1f1be079619550cd18c70db707ce spi_read
a4ad2c0352f71d61f64ed9cabb705edc84ac1f1be079619550cd18c70db707ce 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
a4ad2c0352f71d61f64ed9cabb705edc84ac1f1be079619550cd18c70db707ce spi_read
a4ad2c0352f71d61f64ed9cabb705edc84ac1f1be079619550cd18c70db707ce 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
a4ad2c0352f71d61f64ed9cabb705edc84ac1f1be079619550cd18c70db707ce spi_read
a4ad2c0352f71d61f64ed9cabb705edc84ac1f1be079619550cd18c70db707ce spi_read2
a4ad2c0352f71d61f64ed9cabb705edc84ac1f1be079619550cd18c70db707ce spi_test
b12f8258bf0374eb5c55e659fc430df7a6016d3c0dca2dc04ef1fe82f61d7f67 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 -8388608 256
flash_lock: invalid option -- '8'
Utility to lock, unlock, or check the lock status of the flash.
Default action: lock
Usage: flash_lock [options] [--] <mtd device> [offset [block count]]
Options:
-h --help Display this help and exit
-V --version Display version information and exit
-i --islocked Check if flash region is locked
-l --lock Lock a region of flash
-u --unlock Unlock a region of flash
<mtd device> MTD device node or 'mtd:<name>'
If offset is not specified, it defaults to 0.
If block count is not specified, it defaults to all blocks.
A block count of -1 means all blocks.
+ 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
+ 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 e6dca2493357..979ad8bacae2 100644
--- a/drivers/mtd/spi-nor/winbond.c
+++ b/drivers/mtd/spi-nor/winbond.c
@@ -204,7 +204,7 @@ static const struct flash_info winbond_nor_parts[] = {
}, {
/* W25Q64JV-Q/N */
.id = SNOR_ID(0xef, 0x40, 0x17),
- .flags = SPI_NOR_QUAD_PP,
+ .flags = SPI_NOR_QUAD_PP | SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB | SPI_NOR_HAS_CMP,
}, {
/* W25Q128JV-Q/N */
.id = SNOR_ID(0xef, 0x40, 0x18),
--
2.53.0