Hi frank, Thank you for the patch! Yet something to improve: [auto build test ERROR on lee-mfd/for-mfd-next] [also build test ERROR on brgl/gpio/for-next wsa/i2c/for-next linus/master v5.19-rc2 next-20220616] [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/frank-zago/add-driver-for-the-WCH-CH341-in-I2C-GPIO-mode/20220616-094113 base: https://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git for-mfd-next config: arc-buildonly-randconfig-r004-20220616 (https://download.01.org/0day-ci/archive/20220616/202206161938.BiOHSAOi-lkp@xxxxxxxxx/config) compiler: arc-elf-gcc (GCC) 11.3.0 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/intel-lab-lkp/linux/commit/46c68aee86d34ee630272146a73ad7c3147bb094 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review frank-zago/add-driver-for-the-WCH-CH341-in-I2C-GPIO-mode/20220616-094113 git checkout 46c68aee86d34ee630272146a73ad7c3147bb094 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=arc SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>, old ones prefixed by <<): >> ERROR: modpost: "usb_bulk_msg" [drivers/i2c/busses/i2c-ch341.ko] undefined! >> ERROR: modpost: "usb_deregister" [drivers/mfd/ch341-core.ko] undefined! >> ERROR: modpost: "usb_register_driver" [drivers/mfd/ch341-core.ko] undefined! >> ERROR: modpost: "usb_find_common_endpoints" [drivers/mfd/ch341-core.ko] undefined! Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for MFD_CH341 Depends on HAS_IOMEM && USB Selected by - I2C_CH341 && I2C && HAS_IOMEM -- 0-DAY CI Kernel Test Service https://01.org/lkp
