Hi Liam, kernel test robot noticed the following build warnings: [auto build test WARNING on a5e505a99ca748583dbe558b691be1b26f05d678] url: https://github.com/intel-lab-lkp/linux/commits/Liam-Beguin/dt-bindings-iio-adc-add-lltc-ltc2309-bindings/20230829-104615 base: a5e505a99ca748583dbe558b691be1b26f05d678 patch link: https://lore.kernel.org/r/20230828-ltc2309-v3-2-338b3a8fab8b%40gmail.com patch subject: [PATCH v3 2/2] iio: adc: add ltc2309 support config: sparc-allyesconfig (https://download.01.org/0day-ci/archive/20230829/202308291144.r2JZxP9a-lkp@xxxxxxxxx/config) compiler: sparc64-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230829/202308291144.r2JZxP9a-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/202308291144.r2JZxP9a-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> drivers/iio/adc/ltc2309.c:42: warning: Function parameter or member 'vref_mv' not described in 'ltc2309' vim +42 drivers/iio/adc/ltc2309.c 27 28 /** 29 * struct ltc2309 - internal device data structure 30 * @dev: Device reference 31 * @client: I2C reference 32 * @vref: External reference source 33 * @lock: Lock to serialize data access 34 * @vref_mv Internal voltage reference 35 */ 36 struct ltc2309 { 37 struct device *dev; 38 struct i2c_client *client; 39 struct regulator *vref; 40 struct mutex lock; /* serialize data access */ 41 int vref_mv; > 42 }; 43 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki