Hi Pavel,
Thank you for the response.

>> Git bisect has told me the first bad commit is
>> 31fb632b5d43 spi: Move cadence-quadspi driver to drivers/spi/
> 
> That's strange.
> 
>> Does this change requires device tree modification?
>> Any suggestions or comments would be appreciated.
> 
> ...because that particular change does not change any C code. But it
> touches Kconfig bits; can you check that CONFIG_SPI_CADENCE_QUADSPI is
> enabled in the "bad" configuration?
> 
> Do you have any local changes in
> drivers/mtd/spi-nor/controllers/cadence-quadspi.c or
> drivers/spi/spi-cadence-quadspi.c ?
I have no local changes to those files.
Maybe I lost CONFIG_SPI_CADENCE_QUADSPI accidentally while bisecting.
I will try bisect and post the result again.

Regards,

Takuo Koguchi

> 2021/03/13 8:07、Pavel Machek <pavel@denx.de>のメール:
> 
> Hi!
> 
>> Git bisect has told me the first bad commit is
>> 31fb632b5d43 spi: Move cadence-quadspi driver to drivers/spi/
> 
> That's strange.
> 
>> Does this change requires device tree modification?
>> Any suggestions or comments would be appreciated.
> 
> ...because that particular change does not change any C code. But it
> touches Kconfig bits; can you check that CONFIG_SPI_CADENCE_QUADSPI is
> enabled in the "bad" configuration?
> 
> Do you have any local changes in
> drivers/mtd/spi-nor/controllers/cadence-quadspi.c or
> drivers/spi/spi-cadence-quadspi.c ?
> 
> Best regards,
>                                Pavel
> -- 
> DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
> 
> 
>