[PATCH v2 2/6] mtd: spi-nor: add erase die (chip) capability

[Tudor Ambarus]

On 11/2/23 18:33, Fabio Estevam wrote:
> On 02/11/2023 15:21, Tudor Ambarus wrote:
> 
>> Let's see what gets to the SPI controller. Which SPI controller do you
>> use?
> 
> I am using i.MX8MP, which has drivers/spi/spi-nxp-fspi.c.
> 
> Here is the result:
> 
> root at mcde3000a:~# flash_erase /dev/mtd0 0 0
> Erasing 131072 Kibyte @ 0 --  0 [   26.040903] spi-nor spi0.0: *****
> nor->reg_proto = 0x00010101
> % complete [   26.049570] spi-nor spi0.0: *****
> [   26.053849] spi-nor spi0.0: ***** op.cmd.nbytes = 0x01
> [   26.059118] spi-nor spi0.0: ***** op.cmd.buswidth = 0x01
> [   26.064539] spi-nor spi0.0: ***** op.cmd.opcode = 0xc4
> [   26.069787] spi-nor spi0.0: *****
> [   26.073118] spi-nor spi0.0: ***** op.addr.nbytes = 0x04
> [   26.078451] spi-nor spi0.0: ***** op.addr.buswidth = 0x01
> [   26.083949] spi-nor spi0.0: ***** op.addr.buswidth = 0x0
> [   26.089368] spi-nor spi0.0: *****
> [   26.092699] spi-nor spi0.0: ***** op.dummy.nbytes = 0x00
> [   26.098123] spi-nor spi0.0: ***** op.dummy.buswidth = 0x00
> [   26.103713] spi-nor spi0.0: *****
> [   26.107045] spi-nor spi0.0: ***** op.data.buswidth = 0x00
> [   26.112549] spi-nor spi0.0: ***** op.data.nbytes = 0
> [   26.117727] spi-nor spi0.0: ***** nor->reg_proto = 0x00010101
> [   26.123589] spi-nor spi0.0: *****
> [   26.127012] spi-nor spi0.0: ***** op.cmd.nbytes = 0x01
> [   26.132274] spi-nor spi0.0: ***** op.cmd.buswidth = 0x01
> [   26.137706] spi-nor spi0.0: ***** op.cmd.opcode = 0xc4
> [   26.142956] spi-nor spi0.0: *****
> [   26.146290] spi-nor spi0.0: ***** op.addr.nbytes = 0x04
> [   26.151625] spi-nor spi0.0: ***** op.addr.buswidth = 0x01
> [   26.157132] spi-nor spi0.0: ***** op.addr.buswidth = 0x4000000
> [   26.163065] spi-nor spi0.0: *****
> [   26.166402] spi-nor spi0.0: ***** op.dummy.nbytes = 0x00
> [   26.171815] spi-nor spi0.0: ***** op.dummy.buswidth = 0x00
> [   26.177405] spi-nor spi0.0: *****
> [   26.180737] spi-nor spi0.0: ***** op.data.buswidth = 0x00
> [   26.186241] spi-nor spi0.0: ***** op.data.nbytes = 0
> Erasing 131072 Kibyte @ 0 -- 100 % complete
> 

It looks good ...

> root at mcde3000a:~# hexdump /dev/mtd0
> 0000000 a1d4 168c 4dad dfb2 2a3d c2af 0aae c18a
> 0000010 2d5f 177a c39f 46a4 f9cd b880 331e 2543

but the patient is dead :). Would be good if Takahiro can test on IFX
too. In the meantime I'll try to find a n25q00, I remember I had one in
the past.