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Message-Id: <20251112-nor-v4-3-e4637be82a0a@nxp.com>
Date: Wed, 12 Nov 2025 19:05:11 +0800
From: Haibo Chen <haibo.chen@....com>
To: Tudor Ambarus <tudor.ambarus@...aro.org>,
Pratyush Yadav <pratyush@...nel.org>, Michael Walle <mwalle@...nel.org>,
Miquel Raynal <miquel.raynal@...tlin.com>,
Richard Weinberger <richard@....at>, Vignesh Raghavendra <vigneshr@...com>
Cc: linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
Haibo Chen <haibo.chen@....com>, imx@...ts.linux.dev
Subject: [PATCH v4 3/5] mtd: spi-nor: micron-st: use SFDP of mt35xu512aba
mt35xu512aba has SFDP, already contain the necessary
information, so remove size and some flags here.
Reviewed-by: Tudor Ambarus <tudor.ambarus@...aro.org>
Signed-off-by: Haibo Chen <haibo.chen@....com>
---
1) This mt35xu512aba is populated on the imx943-evk board, was
tested at 200MHz using nxp,imx94-xspi SPI controller.
2) root@...943evk:~# cat /sys/bus/spi/devices/spi8.0/spi-nor/jedec_id
2c5b1a
root@...943evk:~# cat /sys/bus/spi/devices/spi8.0/spi-nor/manufacturer
micron
root@...943evk:~# hexdump -Cv /sys/bus/spi/devices/spi8.0/spi-nor/sfdp
00000000 53 46 44 50 0a 01 03 ff 00 08 01 17 30 00 00 ff |SFDP........0...|
00000010 84 00 01 02 90 00 00 ff 05 01 01 06 a0 00 00 ff |................|
00000020 0a 00 01 08 b0 00 00 ff ff ff ff ff ff ff ff ff |................|
00000030 e5 20 8a ff ff ff ff 1f 00 00 00 00 00 00 00 00 |. ..............|
00000040 ee ff ff ff ff ff 00 00 ff ff 00 00 0c 20 11 d8 |............. ..|
00000050 0f 52 00 00 39 61 99 00 87 8e 03 d3 ac a1 27 3d |.R..9a........'=|
00000060 7a 75 7a 75 fb bd d5 5c 00 00 70 ff 81 50 f8 a1 |zuzu...\..p..P..|
00000070 2f cb 27 8b 00 00 04 01 00 06 01 00 ff ff ff 8e |/.'.............|
00000080 00 00 00 00 00 00 00 00 00 00 00 00 ff ff ff ff |................|
00000090 43 0e ff ff 21 dc 5c ff ff ff ff ff ff ff ff ff |C...!.\.........|
000000a0 00 0b 80 9e b1 81 b5 85 00 f0 ff 9f 00 0a 00 00 |................|
000000b0 00 0a 1a 88 10 00 00 00 ff ff ff ff ff ff ff ff |................|
000000c0 00 00 06 01 00 00 00 00 14 01 81 03 00 00 00 00 |................|
000000d0
root@...943evk:~# sha256sum /sys/bus/spi/devices/spi8.0/spi-nor/sfdp
809cbdfc57ae56771e017ff7bfdae7122afcbcbb238f2502420cfe3b2fe20d11 /sys/bus/spi/devices/spi8.0/spi-nor/sfdp
3) root@...943evk:~# cat /sys/kernel/debug/spi-nor/spi8.0/capabilities
Supported read modes by the flash
1S-1S-1S
opcode 0x13
mode cycles 0
dummy cycles 0
1S-1S-8S
opcode 0x7c
mode cycles 1
dummy cycles 7
1S-8S-8S
opcode 0xcc
mode cycles 1
dummy cycles 15
8D-8D-8D
opcode 0xfd
mode cycles 0
dummy cycles 20
Supported page program modes by the flash
1S-1S-1S
opcode 0x12
8D-8D-8D
opcode 0x12
root@...943evk:~# cat /sys/kernel/debug/spi-nor/spi8.0/params
name (null)
id 2c 5b 1a 10 41 00
size 64.0 MiB
write size 1
page size 256
address nbytes 4
flags 4B_OPCODES | HAS_4BAIT | HAS_16BIT_SR | IO_MODE_EN_VOLATILE | SOFT_RESET
opcodes
read 0xfd
dummy cycles 20
erase 0xdc
program 0x12
8D extension repeat
protocols
read 8D-8D-8D
write 8D-8D-8D
register 8D-8D-8D
erase commands
21 (4.00 KiB) [1]
5c (32.0 KiB) [2]
dc (128 KiB) [3]
c7 (64.0 MiB)
sector map
region (in hex) | erase mask | overlaid
------------------+------------+----------
00000000-03ffffff | [ 3] | no
4) root@...943evk:~# dd if=/dev/urandom of=./spi_test bs=1M count=2
2+0 records in
2+0 records out
2097152 bytes (2.1 MB, 2.0 MiB) copied, 0.0213893 s, 98.0 MB/s
root@...943evk:~# mtd_debug erase /dev/mtd0 0 2097152
Erased 2097152 bytes from address 0x00000000 in flash
root@...943evk:~# mtd_debug read /dev/mtd0 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
root@...943evk:~# hexdump spi_read
0000000 ffff ffff ffff ffff ffff ffff ffff ffff
*
0200000
root@...943evk:~# sha256sum spi_read
4bda3a28f4ffe603c0ec1258c0034d65a1a0d35ab7bd523a834608adabf03cc5 spi_read
root@...943evk:~# mtd_debug write /dev/mtd0 0 2097152 spi_test
Copied 2097152 bytes from spi_test to address 0x00000000 in flash
root@...943evk:~# mtd_debug read /dev/mtd0 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
root@...943evk:~# sha256sum spi*
f7d59270621c04aac29df9fc1742d0a0882047c618833ecf1577a57d109060ab spi_read
f7d59270621c04aac29df9fc1742d0a0882047c618833ecf1577a57d109060ab spi_test
root@...943evk:~# mtd_debug erase /dev/mtd0 0 2097152
Erased 2097152 bytes from address 0x00000000 in flash
root@...943evk:~# mtd_debug read /dev/mtd0 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
root@...943evk:~# sha256sum spi*
4bda3a28f4ffe603c0ec1258c0034d65a1a0d35ab7bd523a834608adabf03cc5 spi_read
f7d59270621c04aac29df9fc1742d0a0882047c618833ecf1577a57d109060ab spi_test
root@...943evk:~# hexdump spi_read
0000000 ffff ffff ffff ffff ffff ffff ffff ffff
*
0200000
root@...943evk:~# mtd_debug info /dev/mtd0
mtd.type = MTD_NORFLASH
mtd.flags = MTD_CAP_NORFLASH
mtd.size = 67108864 (64M)
mtd.erasesize = 131072 (128K)
mtd.writesize = 1
mtd.oobsize = 0
regions = 0
root@...943evk:~# mtd_debug write /dev/mtd0 0 2097152 spi_test
Copied 2097152 bytes from spi_test to address 0x00000000 in flash
root@...943evk:~# mtd_debug read /dev/mtd0 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
root@...943evk:~# hexdump spi_read -n 20
0000000 f3af 8ec6 388f 56a7 4b69 0859 7bde 910b
0000010 ea09 0762
0000014
root@...943evk:~# flash_erase /dev/mtd0 0 0
Erasing 65536 Kibyte @ 0 -- 100 % complete
root@...943evk:~# mtd_debug read /dev/mtd0 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
root@...943evk:~# hexdump spi_read
0000000 ffff ffff ffff ffff ffff ffff ffff ffff
*
0200000
---
drivers/mtd/spi-nor/micron-st.c | 8 ++------
1 file changed, 2 insertions(+), 6 deletions(-)
diff --git a/drivers/mtd/spi-nor/micron-st.c b/drivers/mtd/spi-nor/micron-st.c
index 81a9bead1434056cce0893c97bd35ea248c15894..9a8f82045e4d89f94d005086eb012cc0b3f11cfd 100644
--- a/drivers/mtd/spi-nor/micron-st.c
+++ b/drivers/mtd/spi-nor/micron-st.c
@@ -187,14 +187,10 @@ static const struct spi_nor_fixups mt35xu512aba_fixups = {
static const struct flash_info micron_nor_parts[] = {
{
+ /* MT35XU512ABA */
.id = SNOR_ID(0x2c, 0x5b, 0x1a),
- .name = "mt35xu512aba",
- .sector_size = SZ_128K,
- .size = SZ_64M,
- .no_sfdp_flags = SECT_4K | SPI_NOR_OCTAL_READ |
- SPI_NOR_OCTAL_DTR_READ | SPI_NOR_OCTAL_DTR_PP,
.mfr_flags = USE_FSR,
- .fixup_flags = SPI_NOR_4B_OPCODES | SPI_NOR_IO_MODE_EN_VOLATILE,
+ .fixup_flags = SPI_NOR_IO_MODE_EN_VOLATILE,
.fixups = &mt35xu512aba_fixups,
}, {
.id = SNOR_ID(0x2c, 0x5b, 0x1c),
--
2.34.1
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