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 v6.9-rc1 next-20240328] [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/wefu-redhat-com/drivers-iio-adc-Add-XuanTie-TH1520-ADC-driver/20240330-041029 base: https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg patch link: https://lore.kernel.org/r/20240329200241.4122000-4-wefu%40redhat.com patch subject: [PATCH 3/3] dt-bindings: adc: Document XuanTie TH1520 ADC compiler: loongarch64-linux-gcc (GCC) 13.2.0 reproduce: (https://download.01.org/0day-ci/archive/20240330/202403301900.9wSnTE6y-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/202403301900.9wSnTE6y-lkp@xxxxxxxxx/ dtcheck warnings: (new ones prefixed by >>) >> Documentation/devicetree/bindings/iio/adc/thead,th1520.yaml:45:1: [error] syntax error: found character '\t' that cannot start any token (syntax) -- >> Documentation/devicetree/bindings/iio/adc/thead,th1520.yaml:45:1: found a tab character where an indentation space is expected -- >> Documentation/devicetree/bindings/iio/adc/thead,th1520.yaml: ignoring, error parsing file vim +45 Documentation/devicetree/bindings/iio/adc/thead,th1520.yaml 41 42 examples: 43 - | 44 adc: adc@0xfffff51000 { > 45 compatible = "thead,th1520-adc"; -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki