[PATCH v2 29/35] mtd: spi-nor: winbond: w25q256jvm: Use SPI_NOR_PARSE_SFDP

Tudor Ambarus
2021-07-27T06:40:42Z

Get rid of the static initialization of the flash parameters and
init them when parsing SFDP.
Generated a 256 Kbyte random data and did an erase, write, read back
and compare test. The flash uses for reads SPINOR_OP_READ_1_4_4 0xeb,
for erases SPINOR_OP_BE_4K 0x20, and for writes SPINOR_OP_PP 0x02.

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
---
root@sama5d2-xplained:~# find / -iname spi-nor
find: '/proc/383': No such file or directory
/sys/devices/platform/ahb/ahb:apb/f0020000.spi/spi_master/spi1/spi1.0/spi-nor
/sys/devices/platform/ahb/ahb:apb/f8000000.spi/spi_master/spi0/spi0.0/spi-nor
/sys/bus/spi/drivers/spi-nor
root@sama5d2-xplained:~# ls -al /sys/devices/platform/ahb/ahb:apb/f0020000.spi/spi_master/spi1/spi1.0/spi-nor
total 0
drwxr-xr-x 2 root root 0 Mar 9 14:16 .
drwxr-xr-x 6 root root 0 Mar 9 14:15 ..
-r--r--r-- 1 root root 4096 Mar 9 14:17 jedec_id
-r--r--r-- 1 root root 4096 Mar 9 14:17 manufacturer
-r--r--r-- 1 root root 4096 Mar 9 14:17 partname
-r--r--r-- 1 root root 0 Mar 9 14:17 sfdp
root@sama5d2-xplained:~# cat /sys/devices/platform/ahb/ahb:apb/f0020000.spi/spi_master/spi1/spi1.0/spi-nor/jedec_id
ef7019
root@sama5d2-xplained:~# cat /sys/devices/platform/ahb/ahb:apb/f0020000.spi/spi_master/spi1/spi1.0/spi-nor/manufacturer
winbond
root@sama5d2-xplained:~# cat /sys/devices/platform/ahb/ahb:apb/f0020000.spi/spi_master/spi1/spi1.0/spi-nor/partname
w25q256jvm
root@sama5d2-xplained:~# cat /sys/devices/platform/ahb/ahb:apb/f0020000.spi/spi_master/spi1/spi1.0/spi-nor/sfdp > sfdp-w25q256jvm
root@sama5d2-xplained:~# hexdump sfdp-w25q256jvm
0000000 4653 5044 0105 ff00 0500 1001 0080 ff00
0000010 ffff ffff ffff ffff ffff ffff ffff ffff
*
0000080 20e5 fffb ffff 0fff eb44 6b08 3b08 bb42
0000090 fffe ffff ffff 0000 ffff eb40 200c 520f
00000a0 d810 0000 0236 00a6 ea82 d314 63e9 3376
00000b0 757a 757a a2f7 5cd5 f719 ff4d 70e9 a5f9
00000c0

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 6be45d2291c6..cbfc41b261d7 100644
--- a/drivers/mtd/spi-nor/winbond.c
+++ b/drivers/mtd/spi-nor/winbond.c
@@ -95,7 +95,7 @@ static const struct flash_info winbond_parts[] = {
SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ)
.fixups = &w25q256_fixups },
{ "w25q256jvm", INFO(0xef7019, 0, 64 * 1024, 512,
- SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
+ SPI_NOR_PARSE_SFDP) },
{ "w25q256jw", INFO(0xef6019, 0, 64 * 1024, 512,
SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
{ "w25m512jv", INFO(0xef7119, 0, 64 * 1024, 1024,
--
2.25.1