Hi Hsin-Hsiung, Thank you for the patch! Yet something to improve: [auto build test ERROR on lee-mfd/for-mfd-next] [also build test ERROR on regulator/for-next robh/for-next v5.12-rc5 next-20210331] [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/Hsin-Hsiung-Wang/Add-Support-for... base: https://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git for-mfd-next config: arm64-randconfig-r005-20210330 (attached as .config) compiler: aarch64-linux-gcc (GCC) 9.3.0 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 # https://github.com/0day-ci/linux/commit/c1af528b872dfcb9fc5c2f0ff204baff3... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Hsin-Hsiung-Wang/Add-Support-for-MediaTek-PMIC-MT6359/20210331-190741 git checkout c1af528b872dfcb9fc5c2f0ff204baff330e796d # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 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