Hi Tianling, Thank you for the patch! Yet something to improve: [auto build test ERROR on robh/for-next] [also build test ERROR on rockchip/for-next soc/for-next clk/clk-next v5.12-rc2 next-20210312] [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] url: https://github.com/0day-ci/linux/commits/Tianling-Shen/dt-bindings-Add-do... base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next config: arm64-randconfig-r034-20210312 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 7b153b43d3a14d76975039408c4b922beb576735) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://github.com/0day-ci/linux/commit/3876085b2fc26f04fbdf04041d3465724... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Tianling-Shen/dt-bindings-Add-doc-for-FriendlyARM-NanoPi-R4S/20210313-023029 git checkout 3876085b2fc26f04fbdf04041d3465724a6be425 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org