Hi Paul, I love your patch! Yet something to improve: [auto build test ERROR on abelloni/rtc-next] [also build test ERROR on v5.18-rc3 next-20220414] [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/intel-lab-lkp/linux/commits/Paul-Cercueil/rtc-ingenic-various-updates/20220419-025341 base: https://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux.git rtc-next config: hexagon-randconfig-r041-20220419 (https://download.01.org/0day-ci/archive/20220419/202204191348.uUoPjD9I-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 429cbac0390654f90bba18a41799464adf31a5ec) 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/intel-lab-lkp/linux/commit/a8eada718214bc34ea29f8ff353228abacc0bfb9 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Paul-Cercueil/rtc-ingenic-various-updates/20220419-025341 git checkout a8eada718214bc34ea29f8ff353228abacc0bfb9 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): >> ld.lld: error: undefined symbol: devm_clk_hw_register >>> referenced by rtc-jz4740.c >>> rtc/rtc-jz4740.o:(jz4740_rtc_probe) in archive drivers/built-in.a >>> referenced by rtc-jz4740.c >>> rtc/rtc-jz4740.o:(jz4740_rtc_probe) in archive drivers/built-in.a -- >> ld.lld: error: undefined symbol: of_clk_hw_simple_get >>> referenced by rtc-jz4740.c >>> rtc/rtc-jz4740.o:(jz4740_rtc_probe) in archive drivers/built-in.a >>> referenced by rtc-jz4740.c >>> rtc/rtc-jz4740.o:(jz4740_rtc_probe) in archive drivers/built-in.a -- >> ld.lld: error: undefined symbol: of_clk_add_hw_provider >>> referenced by rtc-jz4740.c >>> rtc/rtc-jz4740.o:(jz4740_rtc_probe) in archive drivers/built-in.a >>> referenced by rtc-jz4740.c >>> rtc/rtc-jz4740.o:(jz4740_rtc_probe) in archive drivers/built-in.a -- 0-DAY CI Kernel Test Service https://01.org/lkp