Re: [RFC v2 07/11] iio: adc: stm32-dfsdm: add scaling support to dfsdm

[kernel test robot <lkp@intel.com>]

Hi Olivier,

[This is a private test report for your RFC patch.]
kernel test robot noticed the following build errors:

[auto build test ERROR on jic23-iio/togreg]
[also build test ERROR on atorgue-stm32/stm32-next robh/for-next linus/master v6.5-rc3 next-20230727]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Olivier-Moysan/iio-introduce-iio-backend-device/20230727-231112
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg
patch link:    https://lore.kernel.org/r/20230727150324.1157933-8-olivier.moysan%40foss.st.com
patch subject: [RFC v2 07/11] iio: adc: stm32-dfsdm: add scaling support to dfsdm
config: loongarch-randconfig-r003-20230727 (https://download.01.org/0day-ci/archive/20230728/202307280647.YJVidOPD-lkp@intel.com/config)
compiler: loongarch64-linux-gcc (GCC) 12.3.0
reproduce: (https://download.01.org/0day-ci/archive/20230728/202307280647.YJVidOPD-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 <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202307280647.YJVidOPD-lkp@intel.com/

All errors (new ones prefixed by >>):

   loongarch64-linux-ld: drivers/iio/adc/stm32-dfsdm-adc.o: in function `stm32_dfsdm_channel_parse_of':
>> stm32-dfsdm-adc.c:(.text+0x1d60): undefined reference to `fwnode_iio_backend_get'

-- 
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https://github.com/intel/lkp-tests/wiki