Hi, kernel test robot noticed the following build warnings: [auto build test WARNING on jic23-iio/togreg] [also build test WARNING on robh/for-next linus/master v6.6-rc4 next-20231004] [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/werneazc-gmail-com/iio-adc-ads7038-Add-driver-support-for-12bit-ADC/20231004-182531 base: https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg patch link: https://lore.kernel.org/r/20231004102330.3713-2-andre.werner%40systec-electronic.com patch subject: [PATCH 2/2] iio: adc: ads7038: Add driver support for 12bit ADC config: powerpc64-allyesconfig (https://download.01.org/0day-ci/archive/20231005/202310050917.qrpQA2nb-lkp@xxxxxxxxx/config) compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231005/202310050917.qrpQA2nb-lkp@xxxxxxxxx/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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202310050917.qrpQA2nb-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> drivers/iio/adc/ti-ads7038-core.c:46:5: warning: no previous prototype for function 'ads7038_read_raw' [-Wmissing-prototypes] 46 | int ads7038_read_raw(struct iio_dev *indio_dev, | ^ drivers/iio/adc/ti-ads7038-core.c:46:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 46 | int ads7038_read_raw(struct iio_dev *indio_dev, | ^ | static 1 warning generated. vim +/ads7038_read_raw +46 drivers/iio/adc/ti-ads7038-core.c 45 > 46 int ads7038_read_raw(struct iio_dev *indio_dev, 47 struct iio_chan_spec const *chan, 48 int *val, int *val2, 49 long mask) 50 { 51 unsigned int ret; 52 struct ads7038_ch_meas_result tmp_val; 53 struct ads7038_data *const data = (struct ads7038_data *)iio_priv(indio_dev); 54 struct ads7038_info *const info = (struct ads7038_info *)data->info; 55 56 ret = info->read_channel(indio_dev, chan->channel, &tmp_val); 57 58 if (ret < 0) { 59 dev_err(&indio_dev->dev, "Read channel returned with error %d", ret); 60 return ret; 61 } 62 63 switch (mask) { 64 case IIO_CHAN_INFO_RAW: 65 *val = tmp_val.raw; 66 67 ret = IIO_VAL_INT; 68 break; 69 case IIO_CHAN_INFO_SCALE: 70 ret = regulator_get_voltage(data->reg); 71 if (ret < 0) 72 break; 73 74 *val = ret / 1000; /* uV -> mV */ 75 *val2 = (1 << chan->scan_type.realbits) - 1; 76 77 ret = IIO_VAL_FRACTIONAL; 78 break; 79 default: 80 ret = -EINVAL; 81 break; 82 } 83 84 return ret; 85 } 86 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
