Hi Charles,

I love your patch! Yet something to improve:

[auto build test ERROR on ljones-mfd/for-mfd-next]
[also build test ERROR on v4.19-rc2 next-20180906]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Charles-Keepax/mfd-lochnagar-Add-support-for-the-Cirrus-Logic-Lochnagar/20180907-010308
base:   https://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git for-mfd-next
config: alpha-allmodconfig (attached as .config)
compiler: alpha-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
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=7.2.0 make.cross ARCH=alpha 

All errors (new ones prefixed by >>):

   drivers/mfd/lochnagar-i2c.o: In function `lochnagar_i2c_probe':
>> (.text+0x4ec): undefined reference to `__devm_regmap_init_i2c'
   (.text+0x500): undefined reference to `__devm_regmap_init_i2c'
   drivers/mfd/lochnagar-i2c.o: In function `lochnagar_i2c_init':
>> (.init.text+0x10): undefined reference to `i2c_register_driver'
   (.init.text+0x24): undefined reference to `i2c_register_driver'

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