From: Teng Wu <gigadevice2025@gmail.com>
To: Miquel Raynal <miquel.raynal@bootlin.com>,
Michael Walle <mwalle@kernel.org>
Cc: Tudor Ambarus <tudor.ambarus@linaro.org>,
Pratyush Yadav <pratyush@kernel.org>,
Richard Weinberger <richard@nod.at>,
Vignesh Raghavendra <vigneshr@ti.com>,
linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org,
teng.wu@gigadevice.com
Subject: [PATCH] mtd: spi-nor: Add support for GD25/GD55 series flashes
Date: Tue, 5 May 2026 21:50:05 +0800 [thread overview]
Message-ID: <afn1jToCHwRmNXjK@Fantast-WT.localdomain> (raw)
From 2918d966442e91ff85d493363ff2e7fee92b05de Mon Sep 17 00:00:00 2001
From: Teng Wu <gigadevice2025@gmail.com>
Date: Wed, 22 Apr 2026 16:17:22 +0800
Subject: [PATCH] mtd: spi-nor: Add support for GD25/GD55 series flashes
Add support for following Gigadevice SPI NOR flashes:
- gd25(b/lb)512mf (64MB)
- gd55(b/lb)01gf (128MB)
- gd55(b/lb)02gf (256MB)
Link: https://github.com/WT-886/DATASHEET
Signed-off-by: Teng Wu <gigadevice2025@gmail.com>
---
Test logs:
test1-> gd25b512mf
root@ast2700-default:~# cat /sys/bus/spi/devices/spi0.1/spi-nor/partname
gd25b512mf
root@ast2700-default:~# cat /sys/bus/spi/devices/spi0.1/spi-nor/jedec_id
c8401a
root@ast2700-default:~# cat /sys/bus/spi/devices/spi0.1/spi-nor/manufacturer
gigadevice
root@ast2700-default:~# hexdump -Cv /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
00000000 53 46 44 50 06 01 02 ff 00 06 01 10 30 00 00 ff |SFDP........0...|
00000010 c8 00 01 03 90 00 00 ff 84 00 01 02 c0 00 00 ff |................|
00000020 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
00000030 e5 20 f3 ff ff ff ff 7f 44 eb 08 6b 08 3b 42 bb |. ......D..k.;B.|
00000040 fe ff ff ff ff ff 00 ff ff ff 44 eb 0c 20 0f 52 |..........D.. .R|
00000050 10 d8 00 ff d6 39 a5 fe 82 d6 14 62 ec 62 16 33 |.....9.....b.b.3|
00000060 7a 75 7a 75 04 bd d5 5c 29 06 04 00 08 50 00 01 |zuzu...\)....P..|
00000070 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
00000080 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
00000090 00 36 00 27 9d f9 77 64 8f cb ff ff ff ff ff ff |.6.'..wd........|
000000a0 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
000000b0 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
000000c0 ff 0e ff ff 21 5c dc ff |....!\..|
000000c8
root@ast2700-default:~# sha256sum /sys/bus/spi/devices/spi0.1/spi-nor/sfdp
2fc728b7dbdb15daf3e685ca7f42c4894fbaa44cbbf7324910578b683744727a /sys/bus/spi/devices/spi0.1/spi-nor/sfdp
root@ast2700-default:~#
root@ast2700-default:~# cat /sys/kernel/debug/spi-nor/spi0.1/capabilities
Supported read modes by the flash
1S-1S-1S
opcode 0x13
mode cycles 0
dummy cycles 0
1S-1S-1S (fast read)
opcode 0x0c
mode cycles 0
dummy cycles 8
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 4
Supported page program modes by the flash
1S-1S-1S
opcode 0x12
1S-1S-4S
opcode 0x34
root@ast2700-default:~#
root@ast2700-default:~# cat /sys/kernel/debug/spi-nor/spi0.1/params
name gd25b512mf
id c8 40 1a c8 40 1a
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 | SOFT_RESET
opcodes
read 0x6c
dummy cycles 8
erase 0xdc
program 0x34
8D extension none
protocols
read 1S-1S-4S
write 1S-1S-4S
register 1S-1S-1S
erase commands
21 (4.00 KiB) [1]
5c (32.0 KiB) [2]
dc (64.0 KiB) [3]
c7 (64.0 MiB)
sector map
region (in hex) | erase mask | overlaid
------------------+------------+----------
00000000-03ffffff | [ 3] | no
root@ast2700-default:~# dd if=/dev/urandom of=./spi_test bs=1M count=2
2+0 records in
2+0 records out
2097152 bytes (2.0MB) copied, 5.688872 seconds, 360.0KB/s
root@ast2700-default:~# ./mtd_debug erase /dev/mtd6 0 2097152
Erased 2097152 bytes from address 0x00000000 in flash
root@ast2700-default:~# ./mtd_debug read /dev/mtd6 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
root@ast2700-default:~# hexdump spi_read
0000000 ffff ffff ffff ffff ffff ffff ffff ffff
*
0200000
root@ast2700-default:~# sha256sum spi_read
4bda3a28f4ffe603c0ec1258c0034d65a1a0d35ab7bd523a834608adabf03cc5 spi_read
root@ast2700-default:~# ./mtd_debug write /dev/mtd6 0 2097152 spi_test
Copied 2097152 bytes from spi_test to address 0x00000000 in flash
root@ast2700-default:~# ./mtd_debug read /dev/mtd6 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
root@ast2700-default:~# sha256sum spi*
3a4031c0260d6d4b5c3491a8c481318cb42f36f5a67ce260c6f7206067eaf8eb spi_read
3a4031c0260d6d4b5c3491a8c481318cb42f36f5a67ce260c6f7206067eaf8eb spi_test
root@ast2700-default:~# ./mtd_debug info /dev/mtd6
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
test2-> gd25lb512mf
root@ast2700-default:/tmp# cat /sys/bus/spi/devices/spi1.0/spi-nor/partname
gd25lb512mf
root@ast2700-default:/tmp# cat /sys/bus/spi/devices/spi1.0/spi-nor/jedec_id
c8601a
root@ast2700-default:/tmp# cat /sys/bus/spi/devices/spi1.0/spi-nor/manufacturer
gigadevice
root@ast2700-default:/tmp# hexdump -Cv /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
00000000 53 46 44 50 06 01 02 ff 00 06 01 10 30 00 00 ff |SFDP........0...|
00000010 c8 00 01 03 90 00 00 ff 84 00 01 02 c0 00 00 ff |................|
00000020 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
00000030 e5 20 f3 ff ff ff ff 7f 44 eb 08 6b 08 3b 42 bb |. ......D..k.;B.|
00000040 fe ff ff ff ff ff 00 ff ff ff 44 eb 0c 20 0f 52 |..........D.. .R|
00000050 10 d8 00 ff d6 39 a5 fe 82 d6 14 62 ec 62 16 33 |.....9.....b.b.3|
00000060 7a 75 7a 75 04 bd d5 5c 29 06 04 00 08 50 00 01 |zuzu...\)....P..|
00000070 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
00000080 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
00000090 00 36 00 27 9d f9 77 64 8f cb ff ff ff ff ff ff |.6.'..wd........|
000000a0 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
000000b0 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
000000c0 ff 0e ff ff 21 5c dc ff |....!\..|
000000c8
root@ast2700-default:/tmp# sha256sum /sys/bus/spi/devices/spi1.0/spi-nor/sfdp
8fa8a248e0aabc3648138c46c5445826c4a2e7ffdb8808d5e9a86332c2b9662e /sys/bus/spi/devices/spi1.0/spi-nor/sfdp
root@ast2700-default:/tmp#
root@ast2700-default:/tmp# cat /sys/kernel/debug/spi-nor/spi1.0/capabilities
Supported read modes by the flash
1S-1S-1S
opcode 0x13
mode cycles 0
dummy cycles 0
1S-1S-1S (fast read)
opcode 0x0c
mode cycles 0
dummy cycles 8
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 4
Supported page program modes by the flash
1S-1S-1S
opcode 0x12
1S-1S-4S
opcode 0x34
root@ast2700-default:/tmp# cat /sys/kernel/debug/spi-nor/spi1.0/params
name gd25lb512mf
id c8 60 1a c8 60 1a
size 64.0 MiB
write size 1
page size 256
address nbytes 4
flags 4B_OPCODES | HAS_4BAIT | HAS_16BIT_SR | NO_READ_CR | SOFT_RESET
opcodes
read 0x3c
dummy cycles 8
erase 0xdc
program 0x12
8D extension repeat
protocols
read 1S-1S-2S
write 1S-1S-1S
register 1S-1S-1S
erase commands
21 (4.00 KiB) [1]
5c (32.0 KiB) [2]
dc (64.0 KiB) [3]
c7 (64.0 MiB)
sector map
region (in hex) | erase mask | overlaid
------------------+------------+----------
00000000-03ffffff | [ 3] | no
root@ast2700-default:/tmp# dd if=/dev/urandom of=./spi_test bs=1M count=2
2+0 records in
2+0 records out
2097152 bytes (2.0MB) copied, 0.034673 seconds, 57.7MB/s
root@ast2700-default:/tmp# ./mtd_debug erase /dev/mtd8 0 2097152
Erased 2097152 bytes from address 0x00000000 in flash
root@ast2700-default:/tmp# ./mtd_debug read /dev/mtd8 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
root@ast2700-default:/tmp# hexdump spi_read
0000000 ffff ffff ffff ffff ffff ffff ffff ffff
*
0200000
root@ast2700-default:/tmp# sha256sum spi_read
4bda3a28f4ffe603c0ec1258c0034d65a1a0d35ab7bd523a834608adabf03cc5 spi_read
root@ast2700-default:/tmp# ./mtd_debug write /dev/mtd8 0 2097152 spi_test
Copied 2097152 bytes from spi_test to address 0x00000000 in flash
root@ast2700-default:/tmp# ./mtd_debug read /dev/mtd8 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
root@ast2700-default:/tmp# sha256sum spi*
fd231c1af2c378eb4f114c4d0cb1988540eb05c6f8fd90c46633441248f037a3 spi_read
fd231c1af2c378eb4f114c4d0cb1988540eb05c6f8fd90c46633441248f037a3 spi_test
root@ast2700-default:/tmp# ./mtd_debug info /dev/mtd8
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
test3-> gd55b01gf
root@ast2700-default:/tmp# dd if=/dev/urandom of=./spi_test bs=1M count=2
2+0 records in
2+0 records out
2097152 bytes (2.0MB) copied, 0.034361 seconds, 58.2MB/s
root@ast2700-default:/tmp# cat /sys/bus/spi/devices/spi0.0/spi-nor/partname
gd55b01gf
root@ast2700-default:/tmp# cat /sys/bus/spi/devices/spi0.0/spi-nor/jedec_id
c8401b
root@ast2700-default:/tmp# cat /sys/bus/spi/devices/spi0.0/spi-nor/manufacturer
gigadevice
root@ast2700-default:/tmp# hexdump -Cv /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
00000000 53 46 44 50 06 01 02 ff 00 06 01 10 30 00 00 ff |SFDP........0...|
00000010 c8 00 01 03 90 00 00 ff 84 00 01 02 c0 00 00 ff |................|
00000020 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
00000030 e5 20 f3 ff ff ff ff 3f 44 eb 08 6b 08 3b 42 bb |. .....?D..k.;B.|
00000040 fe ff ff ff ff ff 00 ff ff ff 44 eb 0c 20 0f 52 |..........D.. .R|
00000050 10 d8 00 ff d6 39 a5 fe 82 d6 14 62 ec 62 16 33 |.....9.....b.b.3|
00000060 7a 75 7a 75 04 bd d5 5c 29 06 74 00 08 50 00 01 |zuzu...\).t..P..|
00000070 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
00000080 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
00000090 00 36 00 27 9d f9 77 64 8f cb ff ff ff ff ff ff |.6.'..wd........|
000000a0 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
000000b0 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
000000c0 ff 0e ff ff 21 5c dc ff |....!\..|
000000c8
root@ast2700-default:/tmp# sha256sum /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
154e574f72e35c9c959f12b2af9db45fdfc6a6c4fa8a18e708f338fab5fd2e43 /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
root@ast2700-default:/tmp#
root@ast2700-default:/tmp# 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-1S (fast read)
opcode 0x0c
mode cycles 0
dummy cycles 8
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 4
Supported page program modes by the flash
1S-1S-1S
opcode 0x12
1S-1S-4S
opcode 0x34
root@ast2700-default:/tmp# cat /sys/kernel/debug/spi-nor/spi0.0/params
name gd55b01gf
id c8 40 1b c8 40 1b
size 128 MiB
write size 1
page size 256
address nbytes 4
flags 4B_OPCODES | HAS_4BAIT | HAS_16BIT_SR | SOFT_RESET
opcodes
read 0x6c
dummy cycles 8
erase 0xdc
program 0x34
8D extension none
protocols
read 1S-1S-4S
write 1S-1S-4S
register 1S-1S-1S
erase commands
21 (4.00 KiB) [1]
5c (32.0 KiB) [2]
dc (64.0 KiB) [3]
c7 (128 MiB)
sector map
region (in hex) | erase mask | overlaid
------------------+------------+----------
00000000-07ffffff | [ 3] | no
root@ast2700-default:/tmp# dd if=/dev/urandom of=./spi_test bs=1M count=2
2+0 records in
2+0 records out
2097152 bytes (2.0MB) copied, 0.035863 seconds, 55.8MB/s
root@ast2700-default:/tmp# ./mtd_debug erase /dev/mtd0 0 2097152
Erased 2097152 bytes from address 0x00000000 in flash
root@ast2700-default:/tmp# ./mtd_debug read /dev/mtd0 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
root@ast2700-default:/tmp# hexdump spi_read
0000000 ffff ffff ffff ffff ffff ffff ffff ffff
*
0200000
root@ast2700-default:/tmp# sha256sum spi_read
4bda3a28f4ffe603c0ec1258c0034d65a1a0d35ab7bd523a834608adabf03cc5 spi_read
root@ast2700-default:/tmp# ./mtd_debug write /dev/mtd0 0 2097152 spi_test
Copied 2097152 bytes from spi_test to address 0x00000000 in flash
root@ast2700-default:/tmp# ./mtd_debug read /dev/mtd0 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
root@ast2700-default:/tmp# sha256sum spi*
0c10262e00676c994a3e341447a44e12411a3a9e92700b4aa22f0d1e11817486 spi_read
0c10262e00676c994a3e341447a44e12411a3a9e92700b4aa22f0d1e11817486 spi_test
root@ast2700-default:/tmp# ./mtd_debug info /dev/mtd0
mtd.type = MTD_NORFLASH
mtd.flags = MTD_CAP_NORFLASH
mtd.size = 134217728 (128M)
mtd.erasesize = 65536 (64K)
mtd.writesize = 1
mtd.oobsize = 0
regions = 0
test4-> gd55lb01gf
root@ast2700-default:/tmp# cat /sys/bus/spi/devices/spi1.0/spi-nor/partname
gd55lb01gf
root@ast2700-default:/tmp# cat /sys/bus/spi/devices/spi1.0/spi-nor/jedec_id
c8601b
root@ast2700-default:/tmp# cat /sys/bus/spi/devices/spi1.0/spi-nor/manufacturer
gigadevice
root@ast2700-default:/tmp# hexdump -Cv /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
00000000 53 46 44 50 06 01 02 ff 00 06 01 10 30 00 00 ff |SFDP........0...|
00000010 c8 00 01 03 90 00 00 ff 84 00 01 02 c0 00 00 ff |................|
00000020 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
00000030 e5 20 f3 ff ff ff ff 7f 44 eb 08 6b 08 3b 42 bb |. ......D..k.;B.|
00000040 fe ff ff ff ff ff 00 ff ff ff 44 eb 0c 20 0f 52 |..........D.. .R|
00000050 10 d8 00 ff d6 39 a5 fe 82 d6 14 62 ec 62 16 33 |.....9.....b.b.3|
00000060 7a 75 7a 75 04 bd d5 5c 29 06 04 00 08 50 00 01 |zuzu...\)....P..|
00000070 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
00000080 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
00000090 00 36 00 27 9d f9 77 64 8f cb ff ff ff ff ff ff |.6.'..wd........|
000000a0 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
000000b0 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
000000c0 ff 0e ff ff 21 5c dc ff |....!\..|
000000c8
root@ast2700-default:/tmp# sha256sum /sys/bus/spi/devices/spi1.0/spi-nor/sfdp
efb1f201a7c3e24390e177446b89c94106201c11cca24fe27472635053f695d9 /sys/bus/spi/devices/spi1.0/spi-nor/sfdp
root@ast2700-default:/tmp#
root@ast2700-default:/tmp# cat /sys/kernel/debug/spi-nor/spi1.0/capabilities
Supported read modes by the flash
1S-1S-1S
opcode 0x13
mode cycles 0
dummy cycles 0
1S-1S-1S (fast read)
opcode 0x0c
mode cycles 0
dummy cycles 8
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 4
Supported page program modes by the flash
1S-1S-1S
opcode 0x12
1S-1S-4S
opcode 0x34
root@ast2700-default:/tmp# cat /sys/kernel/debug/spi-nor/spi1.0/params
name gd55lb01gf
id c8 60 1b c8 60 1b
size 128 MiB
write size 1
page size 256
address nbytes 4
flags HAS_SR_TB | 4B_OPCODES | HAS_4BAIT | HAS_LOCK | HAS_16BIT_SR | NO_READ_CR | SOFT_RESET
opcodes
read 0x3c
dummy cycles 8
erase 0xdc
program 0x12
8D extension repeat
protocols
read 1S-1S-2S
write 1S-1S-1S
register 1S-1S-1S
erase commands
21 (4.00 KiB) [1]
5c (32.0 KiB) [2]
dc (64.0 KiB) [3]
c7 (128 MiB)
sector map
region (in hex) | erase mask | overlaid
------------------+------------+----------
00000000-07ffffff | [ 3] | no
root@ast2700-default:/tmp#
root@ast2700-default:/tmp# dd if=/dev/urandom of=./spi_test bs=1M count=2
2+0 records in
2+0 records out
2097152 bytes (2.0MB) copied, 0.034935 seconds, 57.2MB/s
root@ast2700-default:/tmp# ./mtd_debug erase /dev/mtd8 0 2097152
Erased 2097152 bytes from address 0x00000000 in flash
root@ast2700-default:/tmp# ./mtd_debug read /dev/mtd8 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
root@ast2700-default:/tmp# hexdump spi_read
0000000 ffff ffff ffff ffff ffff ffff ffff ffff
*
0200000
root@ast2700-default:/tmp# sha256sum spi_read
4bda3a28f4ffe603c0ec1258c0034d65a1a0d35ab7bd523a834608adabf03cc5 spi_read
root@ast2700-default:/tmp# ./mtd_debug write /dev/mtd8 0 2097152 spi_test
Copied 2097152 bytes from spi_test to address 0x00000000 in flash
root@ast2700-default:/tmp# ./mtd_debug read /dev/mtd8 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
root@ast2700-default:/tmp# sha256sum spi*
9426559bd5db4978c41d08a81d950b0cdc258dc8890bc63b66e9343da2860650 spi_read
9426559bd5db4978c41d08a81d950b0cdc258dc8890bc63b66e9343da2860650 spi_test
root@ast2700-default:/tmp# ./mtd_debug info /dev/mtd8
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
test5-> gd55b02gf
root@ast2700-default:/work# cat /sys/bus/spi/devices/spi0.0/spi-nor/partname
gd55b02gf
root@ast2700-default:/work# cat /sys/bus/spi/devices/spi0.0/spi-nor/jedec_id
c8401c
root@ast2700-default:/work# cat /sys/bus/spi/devices/spi0.0/spi-nor/manufacturer
gigadevice
root@ast2700-default:/work# hexdump -Cv /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
00000000 53 46 44 50 06 01 02 ff 00 06 01 10 30 00 00 ff |SFDP........0...|
00000010 c8 00 01 03 90 00 00 ff 84 00 01 02 c0 00 00 ff |................|
00000020 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
00000030 e5 20 f3 ff ff ff ff 7f 44 eb 08 6b 08 3b 42 bb |. ......D..k.;B.|
00000040 fe ff ff ff ff ff 00 ff ff ff 44 eb 0c 20 0f 52 |..........D.. .R|
00000050 10 d8 00 ff d6 39 a5 fe 82 d6 14 62 ec 62 16 33 |.....9.....b.b.3|
00000060 7a 75 7a 75 04 bd d5 5c 29 06 04 00 08 50 00 01 |zuzu...\)....P..|
00000070 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
00000080 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
00000090 00 36 00 27 9d f9 77 64 8f cb ff ff ff ff ff ff |.6.'..wd........|
000000a0 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
000000b0 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
000000c0 ff 0e ff ff 21 5c dc ff |....!\..|
000000c8
root@ast2700-default:/work# sha256sum /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
450bcdb73ecde4913e7893a0390f052843080c2e5d252258f193dfad840be139 /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
root@ast2700-default:/work#
root@ast2700-default:/work# 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-1S (fast read)
opcode 0x0c
mode cycles 0
dummy cycles 8
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 4
Supported page program modes by the flash
1S-1S-1S
opcode 0x12
1S-1S-4S
opcode 0x34
root@ast2700-default:/work# cat /sys/kernel/debug/spi-nor/spi0.0/params
name gd55b02gf
id c8 40 1c c8 40 1c
size 256 MiB
write size 1
page size 256
address nbytes 4
flags HAS_SR_TB | 4B_OPCODES | HAS_4BAIT | HAS_LOCK | HAS_16BIT_SR | SOFT_RESET
opcodes
read 0x6c
dummy cycles 8
erase 0xdc
program 0x34
8D extension none
protocols
read 1S-1S-4S
write 1S-1S-4S
register 1S-1S-1S
erase commands
21 (4.00 KiB) [1]
5c (32.0 KiB) [2]
dc (64.0 KiB) [3]
c7 (256 MiB)
sector map
region (in hex) | erase mask | flags
------------------+------------+----------
00000000-0fffffff | [ 123] |
root@ast2700-default:/work#
root@ast2700-default:/work# dd if=/dev/urandom of=./spi_test bs=1M count=2
2+0 records in
2+0 records out
2097152 bytes (2.0MB) copied, 5.420572 seconds, 377.8KB/s
root@ast2700-default:/work# ./mtd_debug erase /dev/mtd0 0 2097152
Erased 2097152 bytes from address 0x00000000 in flash
root@ast2700-default:/work# ./mtd_debug read /dev/mtd0 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
root@ast2700-default:/work# hexdump spi_read
0000000 ffff ffff ffff ffff ffff ffff ffff ffff
*
0200000
root@ast2700-default:/work# sha256sum spi_read
4bda3a28f4ffe603c0ec1258c0034d65a1a0d35ab7bd523a834608adabf03cc5 spi_read
root@ast2700-default:/work# ./mtd_debug write /dev/mtd0 0 2097152 spi_test
Copied 2097152 bytes from spi_test to address 0x00000000 in flash
root@ast2700-default:/work# ./mtd_debug read /dev/mtd0 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
root@ast2700-default:/work# sha256sum spi*
9a4bd863407df7dceaa1ad45845fe6c19d862b72edea8ebeb69a7b0d1cf35a6a spi_read
9a4bd863407df7dceaa1ad45845fe6c19d862b72edea8ebeb69a7b0d1cf35a6a spi_test
root@ast2700-default:/work# ./mtd_debug info /dev/mtd0
mtd.type = MTD_NORFLASH
mtd.flags = MTD_CAP_NORFLASH
mtd.size = 268435456 (256M)
mtd.erasesize = 65536 (64K)
mtd.writesize = 1
mtd.oobsize = 0
regions = 0
test6-> gd55lb02gf
root@ast2700-default:~# cat /sys/bus/spi/devices/spi1.0/spi-nor/partname
gd55lb02gf
root@ast2700-default:~# cat /sys/bus/spi/devices/spi1.0/spi-nor/jedec_id
c8601c
root@ast2700-default:~# cat /sys/bus/spi/devices/spi1.0/spi-nor/manufacturer
gigadevice
root@ast2700-default:~# hexdump -Cv /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
00000000 53 46 44 50 06 01 02 ff 00 06 01 10 30 00 00 ff |SFDP........0...|
00000010 c8 00 01 03 90 00 00 ff 84 00 01 02 c0 00 00 ff |................|
00000020 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
00000030 e5 20 f3 ff ff ff ff 7f 44 eb 08 6b 08 3b 42 bb |. ......D..k.;B.|
00000040 fe ff ff ff ff ff 00 ff ff ff 44 eb 0c 20 0f 52 |..........D.. .R|
00000050 10 d8 00 ff d6 39 a5 fe 82 d6 14 62 ec 62 16 33 |.....9.....b.b.3|
00000060 7a 75 7a 75 04 bd d5 5c 29 06 04 00 08 50 00 01 |zuzu...\)....P..|
00000070 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
00000080 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
00000090 00 36 00 27 9d f9 77 64 8f cb ff ff ff ff ff ff |.6.'..wd........|
000000a0 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
000000b0 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
000000c0 ff 0e ff ff 21 5c dc ff |....!\..|
000000c8
root@ast2700-default:~# sha256sum /sys/bus/spi/devices/spi1.0/spi-nor/sfdp
8cad1f887c45925f160e70013e605c0467cef85ae2f923627b928b9f79c607b0 /sys/bus/spi/devices/spi1.0/spi-nor/sfdp
root@ast2700-default:~#
root@ast2700-default:~# cat /sys/kernel/debug/spi-nor/spi1.0/capabilities
Supported read modes by the flash
1S-1S-1S
opcode 0x13
mode cycles 0
dummy cycles 0
1S-1S-1S (fast read)
opcode 0x0c
mode cycles 0
dummy cycles 8
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 4
Supported page program modes by the flash
1S-1S-1S
opcode 0x12
1S-1S-4S
opcode 0x34
root@ast2700-default:~# cat /sys/kernel/debug/spi-nor/spi1.0/params
name gd55lb02gf
id c8 60 1c c8 60 1c
size 256 MiB
write size 1
page size 256
address nbytes 4
flags HAS_SR_TB | 4B_OPCODES | HAS_4BAIT | HAS_LOCK | HAS_16BIT_SR | NO_READ_CR | SOFT_RESET
opcodes
read 0x3c
dummy cycles 8
erase 0xdc
program 0x12
8D extension repeat
protocols
read 1S-1S-2S
write 1S-1S-1S
register 1S-1S-1S
erase commands
21 (4.00 KiB) [1]
5c (32.0 KiB) [2]
dc (64.0 KiB) [3]
c7 (256 MiB)
sector map
region (in hex) | erase mask | overlaid
------------------+------------+----------
00000000-0fffffff | [ 3] | no
root@ast2700-default:~#
root@ast2700-default:~# dd if=/dev/urandom of=./spi_test bs=1M count=2
2+0 records in
2+0 records out
2097152 bytes (2.0MB) copied, 6.810931 seconds, 300.7KB/s
root@ast2700-default:~# ./mtd_debug erase /dev/mtd7 0 2097152
Erased 2097152 bytes from address 0x00000000 in flash
root@ast2700-default:~# ./mtd_debug read /dev/mtd7 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
root@ast2700-default:~# hexdump spi_read
0000000 ffff ffff ffff ffff ffff ffff ffff ffff
*
0200000
root@ast2700-default:~# sha256sum spi_read
4bda3a28f4ffe603c0ec1258c0034d65a1a0d35ab7bd523a834608adabf03cc5 spi_read
root@ast2700-default:~# ./mtd_debug write /dev/mtd7 0 2097152 spi_test
Copied 2097152 bytes from spi_test to address 0x00000000 in flash
root@ast2700-default:~# ./mtd_debug read /dev/mtd7 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
root@ast2700-default:~# sha256sum spi*
b27ca6e0442b035d15659d44bed55389ca3283995c71186c5da3fe8f72597d3d spi_read
b27ca6e0442b035d15659d44bed55389ca3283995c71186c5da3fe8f72597d3d spi_test
root@ast2700-default:~# ./mtd_debug info /dev/mtd7
mtd.type = MTD_NORFLASH
mtd.flags = MTD_CAP_NORFLASH
mtd.size = 268435456 (256M)
mtd.erasesize = 65536 (64K)
mtd.writesize = 1
mtd.oobsize = 0
regions = 0
---
drivers/mtd/spi-nor/gigadevice.c | 36 ++++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/drivers/mtd/spi-nor/gigadevice.c b/drivers/mtd/spi-nor/gigadevice.c
index 317065490e32..47c2306e3fb0 100644
--- a/drivers/mtd/spi-nor/gigadevice.c
+++ b/drivers/mtd/spi-nor/gigadevice.c
@@ -81,6 +81,42 @@ static const struct flash_info gigadevice_nor_parts[] = {
.size = SZ_16M,
.flags = SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB,
.no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ,
+ }, {
+ .id = SNOR_ID(0xc8, 0x40, 0x1a),
+ .name = "gd25b512mf",
+ .size = SZ_64M,
+ .flags = SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB,
+ .no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ,
+ }, {
+ .id = SNOR_ID(0xc8, 0x60, 0x1a),
+ .name = "gd25lb512mf",
+ .size = SZ_64M,
+ .flags = SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB,
+ .no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ,
+ }, {
+ .id = SNOR_ID(0xc8, 0x40, 0x1b),
+ .name = "gd55b01gf",
+ .size = SZ_128M,
+ .flags = SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB,
+ .no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ,
+ }, {
+ .id = SNOR_ID(0xc8, 0x60, 0x1b),
+ .name = "gd55lb01gf",
+ .size = SZ_128M,
+ .flags = SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB,
+ .no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ,
+ }, {
+ .id = SNOR_ID(0xc8, 0x40, 0x1c),
+ .name = "gd55b02gf",
+ .size = SZ_256M,
+ .flags = SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB,
+ .no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ,
+ }, {
+ .id = SNOR_ID(0xc8, 0x60, 0x1c),
+ .name = "gd55lb02gf",
+ .size = SZ_256M,
+ .flags = SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB,
+ .no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ,
},
};
--
2.43.0
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