Hi Matti,

I love your patch! Perhaps something to improve:

[auto build test WARNING on lee-mfd/for-mfd-next]
[also build test WARNING on regulator/for-next abelloni/rtc-next v5.11-rc2 next-20210108]
[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/Matti-Vaittinen/Support-ROHM-BD71815-PMIC/20210108-215230
base:   https://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git for-mfd-next
config: powerpc64-allyesconfig (attached as .config)
compiler: powerpc64-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/67af8e83e681acc78ab2552025592e881252e470
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Matti-Vaittinen/Support-ROHM-BD71815-PMIC/20210108-215230
        git checkout 67af8e83e681acc78ab2552025592e881252e470
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc64 

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

All warnings (new ones prefixed by >>):

>> drivers/gpio/gpio-bd71815.c:5: warning: "DEBUG" redefined
       5 | #define DEBUG
         | 
   <command-line>: note: this is the location of the previous definition


vim +/DEBUG +5 drivers/gpio/gpio-bd71815.c

   > 5	#define DEBUG
     6	#include <linux/module.h>
     7	#include <linux/init.h>
     8	#include <linux/kthread.h>
     9	#include <linux/irq.h>
    10	#include <linux/gpio/driver.h>
    11	#include <linux/platform_device.h>
    12	#include <linux/of.h>
    13	#include <linux/mfd/rohm-bd71815.h>
    14	#include <linux/mfd/rohm-generic.h>
    15	

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