Hi Amelie,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on next-20210114]
[cannot apply to robh/for-next stm32/stm32-next phy/next v5.11-rc3 v5.11-rc2 v5.11-rc1 v5.11-rc3]
[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/Amelie-Delaunay/STM32-USBPHYC-ck_usbo_48m-clock-provider/20210114-182345
base:    9152a993930d53e94f4857d79681152b9b58636b
config: sh-allmodconfig (attached as .config)
compiler: sh4-linux-gcc (GCC) 9.3.0
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/0day-ci/linux/commit/5b62444ba617c6c32873c5aefba8979b36aa9337
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Amelie-Delaunay/STM32-USBPHYC-ck_usbo_48m-clock-provider/20210114-182345
        git checkout 5b62444ba617c6c32873c5aefba8979b36aa9337
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=sh 

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 >>, old ones prefixed by <<):

ERROR: modpost: "__delay" [drivers/net/mdio/mdio-cavium.ko] undefined!
>> ERROR: modpost: "of_clk_add_hw_provider" [drivers/phy/st/phy-stm32-usbphyc.ko] undefined!
>> ERROR: modpost: "of_clk_hw_simple_get" [drivers/phy/st/phy-stm32-usbphyc.ko] undefined!
>> ERROR: modpost: "clk_hw_register" [drivers/phy/st/phy-stm32-usbphyc.ko] undefined!
>> ERROR: modpost: "of_clk_del_provider" [drivers/phy/st/phy-stm32-usbphyc.ko] undefined!
>> ERROR: modpost: "clk_hw_unregister" [drivers/phy/st/phy-stm32-usbphyc.ko] undefined!
ERROR: modpost: "__udivdi3" [fs/btrfs/btrfs.ko] undefined!
ERROR: modpost: "__umoddi3" [fs/btrfs/btrfs.ko] undefined!

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for SND_ATMEL_SOC_PDC
   Depends on SOUND && !UML && SND && SND_SOC && SND_ATMEL_SOC && HAS_DMA
   Selected by
   - SND_ATMEL_SOC_SSC && SOUND && !UML && SND && SND_SOC && SND_ATMEL_SOC
   - SND_ATMEL_SOC_SSC_PDC && SOUND && !UML && SND && SND_SOC && SND_ATMEL_SOC && ATMEL_SSC

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