Re: [PATCH v2 1/4] drivers: phy: add support for Armada CP110 UTMI PHY

Hi,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on robh/for-next]
[also build test ERROR on arm/for-next keystone/next soc/for-next rockchip/for-next arm64/for-next/core shawnguo/for-next kvmarm/next linus/master v5.11]
[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/kostap-marvell-com/Add-support-for-CP110-UTMI-PHY/20210215-000633
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
config: parisc-randconfig-r034-20210221 (attached as .config)
compiler: hppa-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/dcbc3ab68fea9223d2fe44c3348da8a11c9d5ce3
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review kostap-marvell-com/Add-support-for-CP110-UTMI-PHY/20210215-000633
        git checkout dcbc3ab68fea9223d2fe44c3348da8a11c9d5ce3
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=parisc 

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

All errors (new ones prefixed by >>):

   hppa-linux-ld: drivers/phy/marvell/phy-mvebu-cp110-utmi.o: in function `mvebu_cp110_utmi_phy_probe':

quoted

(.text+0x230): undefined reference to `of_usb_get_dr_mode_by_phy'

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