[PATCH 2/2] iio: dac: Fix dependencies of AD9739A

[Borislav Petkov]

On Sat, Jun 15, 2024 at 06:25:11PM -0700, Alexey Makhalov wrote:
> 0-DAY CI Kernel Test automation reported an issue:
> 
>    ld: drivers/base/regmap/regmap-spi.o: in function `regmap_spi_read':
>    regmap-spi.c:(.text+0xf): undefined reference to `spi_write_then_read'
>    ld: drivers/base/regmap/regmap-spi.o: in function `regmap_spi_gather_write':
>    regmap-spi.c:(.text+0x2b4): undefined reference to `spi_sync'
>    ld: drivers/base/regmap/regmap-spi.o: in function `spi_sync_transfer.constprop.0':
>    regmap-spi.c:(.text+0x337): undefined reference to `spi_sync'
>    ld: drivers/base/regmap/regmap-spi.o: in function `regmap_spi_async_write':
>    regmap-spi.c:(.text+0x445): undefined reference to `spi_async'
>    ld: drivers/iio/dac/ad9739a.o: in function `ad9739a_driver_init':
>    ad9739a.c:(.init.text+0x10): undefined reference to `__spi_register_driver'
> 
> Kconfig warnings: (for reference only)
>    WARNING: unmet direct dependencies detected for REGMAP_SPI
>    Depends on [n]: SPI [=n]
>    Selected by [y]:
>    - AD9739A [=y] && IIO [=y] && (SPI [=n] || COMPILE_TEST [=y])
> 
> The issue is caused by CONFIG_AD9739A=y when CONFIG_SPI is not set.
> 
> Add explicit dependency on SPI and conditional selection of REGMAP_SPI.
> 
> Fixes: e77603d5468b ("iio: dac: support the ad9739a RF DAC")
> Reported-by: kernel test robot <lkp at intel.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202406152104.FxakP1MB-lkp@intel.com/
> Signed-off-by: Alexey Makhalov <alexey.makhalov at broadcom.com>
> ---
>  drivers/iio/dac/Kconfig | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/iio/dac/Kconfig b/drivers/iio/dac/Kconfig
> index 3c2bf620f00f..d095f4d26e49 100644
> --- a/drivers/iio/dac/Kconfig
> +++ b/drivers/iio/dac/Kconfig
> @@ -133,8 +133,8 @@ config AD5624R_SPI
>  
>  config AD9739A
>  	tristate "Analog Devices AD9739A RF DAC spi driver"
> -	depends on SPI || COMPILE_TEST
> -	select REGMAP_SPI
> +	depends on SPI
> +	select REGMAP_SPI if SPI_MASTER
>  	select IIO_BACKEND
>  	help
>  	  Say yes here to build support for Analog Devices AD9739A Digital-to
> -- 

FWIW, I appreciate it you fixing other breakages. However, there's a patch for
that already, on its way:

https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git/commit/?h=fixes-togreg&id=75183e461ce033605c3e85518a9f3d4e4ef848a3

Don't get discouraged, though, when fixing something that is not in our
immediate area of interest!

:-)

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette