Hi Krzysztof,

I love your patch! Perhaps something to improve:

[auto build test WARNING on hwmon/hwmon-next]
[also build test WARNING on robh/for-next v5.14 next-20210909]
[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/Krzysztof-Adamski/Add-per-channel-properies-support-in-tmp421/20210907-214724
base:   https://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git hwmon-next
config: i386-randconfig-s001-20210908 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.4-dirty
        # https://github.com/0day-ci/linux/commit/56fe3c49ca67e9ea9c4f8a40438b5adc58c417f1
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Krzysztof-Adamski/Add-per-channel-properies-support-in-tmp421/20210907-214724
        git checkout 56fe3c49ca67e9ea9c4f8a40438b5adc58c417f1
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash drivers/hwmon/

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


sparse warnings: (new ones prefixed by >>)
   drivers/hwmon/tmp421.c:301:6: sparse: sparse: symbol 'tmp421_probe_child_from_dt' was not declared. Should it be static?
   drivers/hwmon/tmp421.c:345:6: sparse: sparse: symbol 'tmp421_probe_from_dt' was not declared. Should it be static?
>> drivers/hwmon/tmp421.c:356:6: sparse: sparse: symbol 'tmp421_disable_channels' was not declared. Should it be static?

Please review and possibly fold the followup patch.

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