reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/dtor/input.git/commit/?id=a995f3ca3bd51c348bd4c8d1833d318bef1a5001
        git remote add dtor-input https://git.kernel.org/pub/scm/linux/kernel/git/dtor/input.git
        git fetch --no-tags dtor-input next
        git checkout a995f3ca3bd51c348bd4c8d1833d318bef1a5001

        # install riscv cross compiling tool for clang build
        # apt-get install binutils-riscv64-linux-gnu
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests

        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-20 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=riscv olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-20 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash drivers/input/touchscreen/