Hi Robert,

I love your patch! Yet something to improve:

[auto build test ERROR on lee-mfd/for-mfd-next]
[also build test ERROR on hwmon/hwmon-next gpio/for-next v5.12 next-20210506]
[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/Robert-Marko/mfd-Add-Delta-TN48M-CPLD-driver/20210430-203709
base:   https://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git for-mfd-next
config: x86_64-allyesconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/4a3a37836c56a383a726a52892d69bfdd1cf5d4c
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Robert-Marko/mfd-Add-Delta-TN48M-CPLD-driver/20210430-203709
        git checkout 4a3a37836c56a383a726a52892d69bfdd1cf5d4c
        # save the attached .config to linux build tree
        make W=1 W=1 ARCH=x86_64 

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 >>):

   drivers/mfd/tn48m-cpld.c: In function 'hardware_version_show':
>> drivers/mfd/tn48m-cpld.c:36:10: error: implicit declaration of function 'FIELD_GET' [-Werror=implicit-function-declaration]
      36 |  switch (FIELD_GET(HARDWARE_VERSION_MASK, regval)) {
         |          ^~~~~~~~~
   cc1: some warnings being treated as errors


vim +/FIELD_GET +36 drivers/mfd/tn48m-cpld.c

    27	
    28	static int hardware_version_show(struct seq_file *s, void *data)
    29	{
    30		struct tn48m_data *priv = s->private;
    31		unsigned int regval;
    32		char *buf;
    33	
    34		regmap_read(priv->regmap, HARDWARE_VERSION_ID, &regval);
    35	
  > 36		switch (FIELD_GET(HARDWARE_VERSION_MASK, regval)) {
    37		case HARDWARE_VERSION_EVT1:
    38			buf = "EVT1";
    39			break;
    40		case HARDWARE_VERSION_EVT2:
    41			buf = "EVT2";
    42			break;
    43		case HARDWARE_VERSION_DVT:
    44			buf = "DVT";
    45			break;
    46		case HARDWARE_VERSION_PVT:
    47			buf = "PVT";
    48			break;
    49		default:
    50			buf = "Unknown";
    51			break;
    52		}
    53	
    54		seq_printf(s, "%s\n", buf);
    55	
    56		return 0;
    57	}
    58	

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