linux-kernel - Re: [PATCH 1/2] iio: adc: ad9467: include two's complement in default mode

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Message-ID: <202512201254.2FFxkibV-lkp@intel.com>
Date: Sat, 20 Dec 2025 13:13:08 +0800
From: kernel test robot <lkp@...el.com>
To: Tomas Melin <tomas.melin@...sala.com>,
	Michael Hennerich <Michael.Hennerich@...log.com>,
	Nuno Sa <nuno.sa@...log.com>, Lars-Peter Clausen <lars@...afoo.de>,
	Jonathan Cameron <jic23@...nel.org>,
	David Lechner <dlechner@...libre.com>,
	Andy Shevchenko <andy@...nel.org>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
	Tomas Melin <tomas.melin@...sala.com>
Subject: Re: [PATCH 1/2] iio: adc: ad9467: include two's complement in
 default mode

Hi Tomas,

kernel test robot noticed the following build errors:

[auto build test ERROR on a7b10f0963c651a6406d958a5f64b9c5594f84da]

url:    https://github.com/intel-lab-lkp/linux/commits/Tomas-Melin/iio-adc-ad9467-include-two-s-complement-in-default-mode/20251216-233841
base:   a7b10f0963c651a6406d958a5f64b9c5594f84da
patch link:    https://lore.kernel.org/r/20251216-b4-ad9467-optional-backend-v1-1-83e61531ef4d%40vaisala.com
patch subject: [PATCH 1/2] iio: adc: ad9467: include two's complement in default mode
config: hexagon-allmodconfig (https://download.01.org/0day-ci/archive/20251220/202512201254.2FFxkibV-lkp@intel.com/config)
compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251220/202512201254.2FFxkibV-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/202512201254.2FFxkibV-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/iio/adc/ad9467.c:686:3: error: call to undeclared function 'FIELD_PREP'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     686 |                 FIELD_PREP(AN877_ADC_OUTPUT_MODE_MASK,
         |                 ^
   drivers/iio/adc/ad9467.c:1197:4: error: call to undeclared function 'FIELD_PREP'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    1197 |                         FIELD_PREP(AN877_ADC_OUTPUT_MODE_MASK,
         |                         ^
   2 errors generated.


vim +/FIELD_PREP +686 drivers/iio/adc/ad9467.c

   678	
   679	static int ad9647_calibrate_prepare(struct ad9467_state *st)
   680	{
   681		unsigned int cmode;
   682		unsigned int c;
   683		int ret;
   684	
   685		cmode = (st->info->default_output_mode & ~AN877_ADC_OUTPUT_MODE_MASK) |
 > 686			FIELD_PREP(AN877_ADC_OUTPUT_MODE_MASK,
   687				   AN877_ADC_OUTPUT_MODE_OFFSET_BINARY);
   688		ret = ad9467_outputmode_set(st, cmode);
   689		if (ret)
   690			return ret;
   691	
   692		for (c = 0; c < st->info->num_channels; c++) {
   693			ret = ad9467_testmode_set(st, c, AN877_ADC_TESTMODE_PN9_SEQ);
   694			if (ret)
   695				return ret;
   696	
   697			ret = ad9467_backend_testmode_on(st, c,
   698							 IIO_BACKEND_ADI_PRBS_9A);
   699			if (ret)
   700				return ret;
   701		}
   702	
   703		return 0;
   704	}
   705	

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