linux-kernel - Re: [PATCH 4/4] iio: adc: ad7768-1: add support for ADAQ776x-1 ADC Family

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Message-ID: <202508140742.AhFMglnF-lkp@intel.com>
Date: Thu, 14 Aug 2025 07:21:18 +0800
From: kernel test robot <lkp@...el.com>
To: Jonathan Santos <Jonathan.Santos@...log.com>, linux-iio@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	Jonathan Santos <Jonathan.Santos@...log.com>,
	Michael.Hennerich@...log.com, jic23@...nel.org,
	dlechner@...libre.com, nuno.sa@...log.com, andy@...nel.org,
	robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org,
	jonath4nns@...il.com
Subject: Re: [PATCH 4/4] iio: adc: ad7768-1: add support for ADAQ776x-1 ADC
 Family

Hi Jonathan,

kernel test robot noticed the following build errors:

[auto build test ERROR on 0a686b9c4f847dc21346df8e56d5b119918fefef]

url:    https://github.com/intel-lab-lkp/linux/commits/Jonathan-Santos/dt-bindings-iio-adc-ad7768-1-add-new-supported-parts/20250813-145315
base:   0a686b9c4f847dc21346df8e56d5b119918fefef
patch link:    https://lore.kernel.org/r/f0c1cbc9c2994a90113788cad57df1f32f9db45e.1754617360.git.Jonathan.Santos%40analog.com
patch subject: [PATCH 4/4] iio: adc: ad7768-1: add support for ADAQ776x-1 ADC Family
config: hexagon-randconfig-002-20250814 (https://download.01.org/0day-ci/archive/20250814/202508140742.AhFMglnF-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 3769ce013be2879bf0b329c14a16f5cb766f26ce)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250814/202508140742.AhFMglnF-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202508140742.AhFMglnF-lkp@intel.com/

All errors (new ones prefixed by >>):

>> ld.lld: error: undefined symbol: rational_best_approximation
   >>> referenced by ad7768-1.c:554 (drivers/iio/adc/ad7768-1.c:554)
   >>>               drivers/iio/adc/ad7768-1.o:(ad7768_configure_dig_fil) in archive vmlinux.a
   >>> referenced by ad7768-1.c:554 (drivers/iio/adc/ad7768-1.c:554)
   >>>               drivers/iio/adc/ad7768-1.o:(ad7768_configure_dig_fil) in archive vmlinux.a

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