Re: [PATCH 2/4] iio: adc: Add support for the Renesas RZ/N1 ADC

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

Hi Herve,

kernel test robot noticed the following build warnings:

[auto build test WARNING on jic23-iio/togreg]
[also build test WARNING on geert-renesas-devel/next linus/master v6.18-rc1 next-20251015]
[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/Herve-Codina-Schneider-Electric/dt-bindings-iio-adc-Add-the-Renesas-RZ-N1-ADC/20251015-223254
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg
patch link:    https://lore.kernel.org/r/20251015142816.1274605-3-herve.codina%40bootlin.com
patch subject: [PATCH 2/4] iio: adc: Add support for the Renesas RZ/N1 ADC
config: alpha-allyesconfig (https://download.01.org/0day-ci/archive/20251016/202510162035.gngVSgxu-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251016/202510162035.gngVSgxu-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/202510162035.gngVSgxu-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/iio/adc/rzn1-adc.c: In function 'rzn1_adc_vc_setup_conversion':
   drivers/iio/adc/rzn1-adc.c:53:49: error: implicit declaration of function 'FIELD_PREP' [-Wimplicit-function-declaration]
      53 | #define RZN1_ADC_VC_ADC1_CHANNEL_SEL(_c)        FIELD_PREP(RZN1_ADC_VC_ADC1_CHANNEL_SEL_MASK, _c)
         |                                                 ^~~~~~~~~~
   drivers/iio/adc/rzn1-adc.c:243:49: note: in expansion of macro 'RZN1_ADC_VC_ADC1_CHANNEL_SEL'
     243 |                 vc |= RZN1_ADC_VC_ADC1_ENABLE | RZN1_ADC_VC_ADC1_CHANNEL_SEL(adc1_ch);
         |                                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/iio/adc/rzn1-adc.c: In function 'rzn1_adc_vc_wait_conversion':
   drivers/iio/adc/rzn1-adc.c:58:41: error: implicit declaration of function 'FIELD_GET' [-Wimplicit-function-declaration]
      58 | #define RZN1_ADC_ADCX_GET_DATA(_reg)    FIELD_GET(RZN1_ADC_ADCX_DATA_DATA_MASK, _reg)
         |                                         ^~~~~~~~~
   drivers/iio/adc/rzn1-adc.c:304:30: note: in expansion of macro 'RZN1_ADC_ADCX_GET_DATA'
     304 |                 *adc1_data = RZN1_ADC_ADCX_GET_DATA(data_reg);
         |                              ^~~~~~~~~~~~~~~~~~~~~~
   drivers/iio/adc/rzn1-adc.c: At top level:
>> drivers/iio/adc/rzn1-adc.c:592:12: warning: 'rzn1_adc_pm_runtime_resume' defined but not used [-Wunused-function]
     592 | static int rzn1_adc_pm_runtime_resume(struct device *dev)
         |            ^~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/iio/adc/rzn1-adc.c:582:12: warning: 'rzn1_adc_pm_runtime_suspend' defined but not used [-Wunused-function]
     582 | static int rzn1_adc_pm_runtime_suspend(struct device *dev)
         |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/rzn1_adc_pm_runtime_resume +592 drivers/iio/adc/rzn1-adc.c

   581	
 > 582	static int rzn1_adc_pm_runtime_suspend(struct device *dev)
   583	{
   584		struct iio_dev *indio_dev = dev_get_drvdata(dev);
   585		struct rzn1_adc *rzn1_adc = iio_priv(indio_dev);
   586	
   587		rzn1_adc_disable(rzn1_adc);
   588	
   589		return 0;
   590	}
   591	
 > 592	static int rzn1_adc_pm_runtime_resume(struct device *dev)
   593	{
   594		struct iio_dev *indio_dev = dev_get_drvdata(dev);
   595		struct rzn1_adc *rzn1_adc = iio_priv(indio_dev);
   596	
   597		return rzn1_adc_enable(rzn1_adc);
   598	}
   599	

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