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@xxxxxxxxx> Closes: https://lore.kernel.org/oe-kbuild-all/202406152104.FxakP1MB-lkp@xxxxxxxxx/ Signed-off-by: Alexey Makhalov <alexey.makhalov@xxxxxxxxxxxx> --- 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 -- 2.39.4