[PATCH] mtd: spi-nor: XTX: Add support for XTX XT25F128B

[Alex Bee]

Am 02.07.21 um 15:21 schrieb Tudor.Ambarus at microchip.com:
> On 7/2/21 3:49 PM, Alex Bee wrote:
>> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
>>
>> Hi Chris, guys
> 
> Hi,
> 
>>
>>
>> Am 02.04.21 um 22:15 schrieb Chris Morgan:
>>> Add support for a new vendor (XTX) along with a new chip from the
>>> vendor (XT25F128B). This chip is used in the Odroid Go Advance,
>>> and has been tested extensively using the spi-gpio driver, as it
>>> is connected to a serial flash controller that is not currently
>>> supported (but the pins can be repurposed to GPIO). Read, write, and
>>> erase all work as expected.
>> Once you've figured out how vendor id stuff is read out correctly, would
>> you mind also adding the the XT25F32B variant?
> 
> I've started working on this, here's the work in progress:
> https://github.com/ambarus/linux-0day/commits/spi-nor/next-id-collisions
> 
>>  From what I've checked it has all things in common with XT25F128B -
>> just has a 64 instead of 256 sectors.
>>
>> Datasheet can be found at:
>> https://datasheet.lcsc.com/szlcsc/2005251035_XTX-XT25F32BSOIGU-S_C558851.pdf
>>
>>>
>>> Datasheet can be found here:
>>> https://datasheet.lcsc.com/szlcsc/2005251034_XTX-XT25F128BSSIGT_C558844.pdf
>>>
> 
> we'll add just flashes that we can test. Do you have the flash at hand?

I do, yes. I'm currently adding devicetree support for the upcoming Rock 
Pi 4 plus revisions, which will have these flashes onboard.

After adding support for this variant ontop these patches (the wrong(?) 
flashid is 0x0b4016, btw.) everything is working as expected.

Since it has been requested - the sfpd table and other sysfs entries 
look like that:

~ # hexdump 
/sys/devices/platform/ff1d0000.spi/spi_master/spi0/spi0.0/spi-nor/sfdp

0000000 4653 5044 0100 ff01 0000 0901 0030 ff00
0000010 000b 0301 0060 ff00 ffff ffff ffff ffff
0000020 ffff ffff ffff ffff ffff ffff ffff ffff
0000030 20e5 fff1 ffff 01ff eb44 6b08 3b08 bb42
0000040 ffee ffff ffff ff00 ffff ff00 200c 520f
0000050 d810 ff00 ffff ffff ffff ffff ffff ffff
0000060 3600 2700 7994 64ff e3fc ffff
000006c

~ # cat 
/sys/devices/platform/ff1d0000.spi/spi_master/spi0/spi0.0/spi-nor/jedec_id
0b4016

~ # cat 
/sys/devices/platform/ff1d0000.spi/spi_master/spi0/spi0.0/spi-nor/manufacturer 

xtx

~ # cat 
/sys/devices/platform/ff1d0000.spi/spi_master/spi0/spi0.0/spi-nor/partname
XT25F32B

Alex.
> 
> Cheers,
> ta
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