[PATCH v2 30/35] mtd: spi-nor: issi: is25lp256: Use SPI_NOR_PARSE_SFDP

Tudor Ambarus
2021-07-27T06:46:47Z

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_4B 0xec,
for erases SPINOR_OP_BE_4K_4B 0x21, and for writes SPINOR_OP_PP_4B 0x12.

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
---
root@sama5d2-xplained:~# cat /sys/devices/platform/ahb/ahb:apb/f0020000.spi/spi_master/spi1/spi1.0/spi-nor/jedec_id
9d6019
root@sama5d2-xplained:~# cat /sys/devices/platform/ahb/ahb:apb/f0020000.spi/spi_master/spi1/spi1.0/spi-nor/manufacturer
issi
root@sama5d2-xplained:~# cat /sys/devices/platform/ahb/ahb:apb/f0020000.spi/spi_master/spi1/spi1.0/spi-nor/partname
is25lp256
root@sama5d2-xplained:~# cat /sys/devices/platform/ahb/ahb:apb/f0020000.spi/spi_master/spi1/spi1.0/spi-nor/sfdp > sfdp-issi
root@sama5d2-xplained:~# hexdump sfdp-issi
0000000 4653 5044 0106 ff01 0600 1001 0030 ff00
0000010 059d 0301 0080 0200 ffff ffff ffff ffff
0000020 ffff ffff ffff ffff ffff ffff ffff ffff
0000030 20e5 fff9 ffff 0fff eb44 6b08 3b08 bb80
0000040 fffe ffff ffff ff00 ffff eb44 200c 520f
0000050 d810 ff00 4a23 00c9 d882 ce11 cdcc 4668
0000060 757a 757a aef7 5cd5 424a ff2c 30f0 a9f2
0000070 ffff ffff ffff ffff ffff ffff ffff ffff
0000080 3600 2300 f99e 64c0 ef8f ffff
000008c

drivers/mtd/spi-nor/issi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/spi-nor/issi.c b/drivers/mtd/spi-nor/issi.c
index aeff8f60cbae..4f778f5d6adb 100644
--- a/drivers/mtd/spi-nor/issi.c
+++ b/drivers/mtd/spi-nor/issi.c
@@ -45,7 +45,7 @@ static const struct flash_info issi_parts[] = {
{ "is25lp128", INFO(0x9d6018, 0, 64 * 1024, 256,
SECT_4K | SPI_NOR_DUAL_READ) },
{ "is25lp256", INFO(0x9d6019, 0, 64 * 1024, 512,
- SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ)
+ SPI_NOR_PARSE_SFDP)
.fixups = &is25lp256_fixups,
.late_init = snor_f_4b_opcodes, },
{ "is25wp032", INFO(0x9d7016, 0, 64 * 1024, 64,
--
2.25.1