Hi Thomas,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on lee-mfd/for-mfd-next]
[also build test WARNING on sre-power-supply/for-next linux/master linus/master v5.15 next-20211108]
[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/Thomas-Marangoni/PM-Added-functionality-to-the-axp20x_battery-driver/20211025-225315
base:   https://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git for-mfd-next
config: x86_64-randconfig-s021-20211027 (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/246898bd0bf3718e9ef41526e6d2aa6a3fbb34f7
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Thomas-Marangoni/PM-Added-functionality-to-the-axp20x_battery-driver/20211025-225315
        git checkout 246898bd0bf3718e9ef41526e6d2aa6a3fbb34f7
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/power/supply/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <redacted>


sparse warnings: (new ones prefixed by >>)

quoted

drivers/power/supply/axp20x_battery.c:105:11: sparse: sparse: symbol 'axp20x_ocv_values_uV' was not declared. Should it be static?
drivers/power/supply/axp20x_battery.c:1004:1: sparse: sparse: symbol 'dev_attr_voltage_low_alert_level1' 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