Re: [PATCH v4 3/6] iio: adc: ad4030: add averaging support

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

Hi Esteban,

kernel test robot noticed the following build warnings:

[auto build test WARNING on a64dcfb451e254085a7daee5fe51bf22959d52d3]

url:    https://github.com/intel-lab-lkp/linux/commits/Esteban-Blanc/dt-bindings-iio-adc-add-ADI-ad4030-ad4630-and-ad4632/20250214-202727
base:   a64dcfb451e254085a7daee5fe51bf22959d52d3
patch link:    https://lore.kernel.org/r/20250214-eblanc-ad4630_v1-v4-3-135dd66cab6a%40baylibre.com
patch subject: [PATCH v4 3/6] iio: adc: ad4030: add averaging support
config: alpha-allyesconfig (https://download.01.org/0day-ci/archive/20250216/202502160240.IoVS8Klu-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250216/202502160240.IoVS8Klu-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/202502160240.IoVS8Klu-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/iio/adc/ad4030.c: In function 'ad4030_get_chan_scale':
>> drivers/iio/adc/ad4030.c:375:27: warning: assignment discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
     375 |                 scan_type = iio_get_current_scan_type(indio_dev,
         |                           ^


vim +/const +375 drivers/iio/adc/ad4030.c

   365	
   366	static int ad4030_get_chan_scale(struct iio_dev *indio_dev,
   367					 struct iio_chan_spec const *chan,
   368					 int *val,
   369					 int *val2)
   370	{
   371		struct ad4030_state *st = iio_priv(indio_dev);
   372		struct iio_scan_type *scan_type;
   373	
   374		if (chan->differential) {
 > 375			scan_type = iio_get_current_scan_type(indio_dev,
   376							      st->chip->channels);
   377			*val = (st->vref_uv * 2) / MILLI;
   378			*val2 = scan_type->realbits;
   379			return IIO_VAL_FRACTIONAL_LOG2;
   380		}
   381	
   382		*val = st->vref_uv / MILLI;
   383		*val2 = chan->scan_type.realbits;
   384		return IIO_VAL_FRACTIONAL_LOG2;
   385	}
   386	

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