AW: (EXT) Re: [PATCH 2/2] mtd: spi-nor: micron-st: Add support for output-driver-strength

[Tudor.Ambarus at microchip.com]

On 10/4/21 3:10 PM, Alexander Stein wrote:
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> 
> Hello,

Hi,

> 
>> Does the micron flash define the SCCR SFDP map?
> 
> As far as I can tell, it only defines the Basis SPI protocol and the 4-byte Adress Instruction Table.
> Dunno when the SCCR SFDP map was added, but this flash only announces JESD216B (SFDP 1.6)
> 
> Is there some tool for dumping/decoding the SFDP available?
> 

you can access dump the SFDP tables via sysfs. Here's an example:

root at sama5d2-xplained:~# find / -iname spi-nor
/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 at 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 14:51 .
drwxr-xr-x 6 root root    0 Mar  9 14:50 ..
-r--r--r-- 1 root root 4096 Mar  9 14:51 jedec_id
-r--r--r-- 1 root root 4096 Mar  9 14:51 manufacturer
-r--r--r-- 1 root root 4096 Mar  9 14:51 partname
-r--r--r-- 1 root root    0 Mar  9 14:51 sfdp
root at sama5d2-xplained:~# cat /sys/devices/platform/ahb/ahb:apb/f0020000.spi/spi_master/spi1/spi1.0/spi-nor/jedec_id
c22016
root at sama5d2-xplained:~# cat /sys/devices/platform/ahb/ahb:apb/f0020000.spi/spi_master/spi1/spi1.0/spi-nor/manufacturer
macronix
root at sama5d2-xplained:~# cat /sys/devices/platform/ahb/ahb:apb/f0020000.spi/spi_master/spi1/spi1.0/spi-nor/partname
mx25l3233f
root at sama5d2-xplained:~# cat /sys/devices/platform/ahb/ahb:apb/f0020000.spi/spi_master/spi1/spi1.0/spi-nor/sfdp > mx25l3233f-sfdp
root at sama5d2-xplained:~# hexdump mx25l3233f-sfdp
0000000 4653 5044 0100 ff01 0000 0901 0030 ff00
0000010 00c2 0401 0060 ff00 ffff ffff ffff ffff
0000020 ffff ffff ffff ffff ffff ffff ffff ffff
0000030 20e5 fff1 ffff 01ff eb44 6b08 3b08 bb04
0000040 ffee ffff ffff ff00 ffff ff00 200c 520f
0000050 d810 ff00 ffff ffff ffff ffff ffff ffff
0000060 3600 2650 f99c 6477 cffe ffff ffff ffff
0000070