Hi Jiaxun,

I love your patch! Yet something to improve:

[auto build test ERROR on robh/for-next]
[also build test ERROR on clk/clk-next linus/master v5.13 next-20210707]
[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/Jiaxun-Yang/MIPS-Migrate-pistachio-to-generic-kernel/20210707-111744
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
config: ia64-randconfig-s031-20210707 (attached as .config)
compiler: ia64-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.3-341-g8af24329-dirty
        # https://github.com/0day-ci/linux/commit/802097a6e909770f8e62039373f82b62a478e25b
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Jiaxun-Yang/MIPS-Migrate-pistachio-to-generic-kernel/20210707-111744
        git checkout 802097a6e909770f8e62039373f82b62a478e25b
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=ia64 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   ia64-linux-ld: drivers/pinctrl/pinctrl-pistachio.o: in function `pinconf_generic_dt_node_to_map_pin':
>> pinctrl-pistachio.c:(.text+0x16d2): undefined reference to `pinconf_generic_dt_node_to_map'

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for OF_GPIO
   Depends on GPIOLIB && OF && HAS_IOMEM
   Selected by
   - PINCTRL_PISTACHIO && PINCTRL && (MIPS || COMPILE_TEST && GPIOLIB
   WARNING: unmet direct dependencies detected for GPIO_SYSCON
   Depends on GPIOLIB && HAS_IOMEM && MFD_SYSCON && OF
   Selected by
   - GPIO_SAMA5D2_PIOBU && GPIOLIB && HAS_IOMEM && MFD_SYSCON && OF_GPIO

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org