Hi Saravanan,

I love your patch! Yet something to improve:

[auto build test ERROR on next-20200320]
[also build test ERROR on v5.6-rc7]
[cannot apply to ljones-mfd/for-mfd-next iio/togreg power-supply/for-next v5.6-rc6 v5.6-rc5 v5.6-rc4]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Saravanan-Sekar/Add-battery-charger-driver-support-for-MP2629/20200323-064940
base:    d8f289c16fbb72e17b783175c1fb0942816264fd
config: s390-allmodconfig (attached as .config)
compiler: s390-linux-gcc (GCC) 9.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        GCC_VERSION=9.2.0 make.cross ARCH=s390 

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

All errors (new ones prefixed by >>):

   s390-linux-ld: drivers/mfd/mp2629.o: in function `mp2629_probe':
   mp2629.c:(.text+0x86): undefined reference to `__devm_regmap_init_i2c'
   s390-linux-ld: drivers/mfd/mp2629.o: in function `mp2629_driver_init':
   mp2629.c:(.init.text+0x64): undefined reference to `i2c_register_driver'
   s390-linux-ld: drivers/mfd/mp2629.o: in function `mp2629_driver_exit':
   mp2629.c:(.exit.text+0x2a): undefined reference to `i2c_del_driver'
   s390-linux-ld: drivers/power/supply/mp2629_charger.o: in function `mp2629_charger_remove':
   mp2629_charger.c:(.text+0x154): undefined reference to `iio_channel_release'
   s390-linux-ld: drivers/power/supply/mp2629_charger.o: in function `mp2629_charger_usb_get_prop':
   mp2629_charger.c:(.text+0x810): undefined reference to `iio_read_channel_processed'
   s390-linux-ld: drivers/power/supply/mp2629_charger.o: in function `mp2629_charger_probe':
   mp2629_charger.c:(.text+0xee4): undefined reference to `iio_channel_get'
>> s390-linux-ld: mp2629_charger.c:(.text+0x1270): undefined reference to `iio_channel_release'
   s390-linux-ld: drivers/power/supply/mp2629_charger.o: in function `mp2629_charger_battery_get_prop':
   mp2629_charger.c:(.text+0x179e): undefined reference to `iio_read_channel_processed'
>> s390-linux-ld: mp2629_charger.c:(.text+0x1844): undefined reference to `iio_read_channel_processed'

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