Hi Matti,

kernel test robot noticed the following build errors:

[auto build test ERROR on d1487b0b78720b86ec2a2ac7acc683ec90627e5b]

url:    https://github.com/intel-lab-lkp/linux/commits/Matti-Vaittinen/dt-bindings-iio-adc-ROHM-BD79112-ADC-GPIO/20250905-144454
base:   d1487b0b78720b86ec2a2ac7acc683ec90627e5b
patch link:    https://lore.kernel.org/r/3cc1faffcb4f71f0755b6192f193acecd36bea67.1757053456.git.mazziesaccount%40gmail.com
patch subject: [PATCH v3 2/3] iio: adc: Support ROHM BD79112 ADC/GPIO
config: i386-randconfig-r133-20250908 (https://download.01.org/0day-ci/archive/20250909/202509090302.DzgxdNbE-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250909/202509090302.DzgxdNbE-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot [off-list ref]
| Closes: https://lore.kernel.org/oe-kbuild-all/202509090302.DzgxdNbE-lkp@intel.com/ (local)

All errors (new ones prefixed by >>, old ones prefixed by <<):

quoted

ERROR: modpost: "spi_sync" [drivers/base/regmap/regmap-spi.ko] undefined!
ERROR: modpost: "spi_async" [drivers/base/regmap/regmap-spi.ko] undefined!
ERROR: modpost: "spi_write_then_read" [drivers/base/regmap/regmap-spi.ko] undefined!
ERROR: modpost: "__spi_register_driver" [drivers/iio/adc/rohm-bd79112.ko] undefined!
ERROR: modpost: "spi_sync" [drivers/iio/adc/rohm-bd79112.ko] undefined!

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for REGMAP_SPI
   Depends on [n]: SPI [=n]
   Selected by [m]:
   - ROHM_BD79112 [=m] && IIO [=m] && I2C [=y] && GPIOLIB [=y]

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki