[PATCH v3 23/25] mtd: spi-nor: gigadevice: gd25q256: Init flash based on SFDP

[Tudor.Ambarus at microchip.com]

On 10/29/21 8:26 PM, Tudor Ambarus wrote:
> 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_1_1_4_4B
> 0x34.
> 
> Signed-off-by: Tudor Ambarus <tudor.ambarus at microchip.com>
> ---

root at sama5d2-xplained:~# cat /sys/devices/platform/ahb/ahb:apb/f0020000.spi/spi_master/spi1/spi1.0/spi-nor/jedec_id
c84019
root at sama5d2-xplained:~# cat /sys/devices/platform/ahb/ahb:apb/f0020000.spi/spi_master/spi1/spi1.0/spi-nor/manufacturer
gigadevice
root at sama5d2-xplained:~# cat /sys/devices/platform/ahb/ahb:apb/f0020000.spi/spi_master/spi1/spi1.0/spi-nor/partname    
gd25q256
root at sama5d2-xplained:~# cat /sys/devices/platform/ahb/ahb:apb/f0020000.spi/spi_master/spi1/spi1.0/spi-nor/sfdp > gd25q256-sfdp
root at sama5d2-xplained:~# hexdump gd25q256-sfdp 
0000000 4653 5044 0106 ff02 0600 1001 0030 ff00
0000010 00c8 0301 0090 ff00 0084 0201 00c0 ff00
0000020 ffff ffff ffff ffff ffff ffff ffff ffff
0000030 20e5 fff3 ffff 0fff eb44 6b08 3b08 bb42
0000040 ffee ffff ffff ff00 ffff ff00 200c 520f
0000050 d810 ff00 6242 fec9 e982 5814 60ec 3306
0000060 757a 757a bd04 5cd5 0600 0044 5008 0100
0000070 ffff ffff ffff ffff ffff ffff ffff ffff
*
0000090 3600 2700 f99e 6477 cbfc ffff ffff ffff
00000a0 ffff ffff ffff ffff ffff ffff ffff ffff
*
00000c0 0eff fff0 5c21 ffdc                    
00000c8

>  drivers/mtd/spi-nor/gigadevice.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)