Hi ChiaEn,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on sre-power-supply/for-next]
[also build test ERROR on robh/for-next linus/master v6.0-rc7 next-20220928]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/ChiaEn-Wu/Add-Richtek-RT9467-5A-Battery-Charger-support/20220929-183906
base:   https://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply.git for-next
config: sh-allmodconfig
compiler: sh4-linux-gcc (GCC) 12.1.0
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/intel-lab-lkp/linux/commit/042b1a763ec2948a412ff2a7fa500b98aace9923
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review ChiaEn-Wu/Add-Richtek-RT9467-5A-Battery-Charger-support/20220929-183906
        git checkout 042b1a763ec2948a412ff2a7fa500b98aace9923
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=sh SHELL=/bin/bash drivers/power/

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

All errors (new ones prefixed by >>):

   drivers/power/supply/rt9467-charger.c: In function 'rt9467_get_adc_raw_data':
>> drivers/power/supply/rt9467-charger.c:436:43: error: implicit declaration of function 'FIELD_PREP' [-Werror=implicit-function-declaration]
     436 |         reg_val = RT9467_MASK_ADC_START | FIELD_PREP(RT9467_MASK_ADC_IN_SEL, adc_sel);
         |                                           ^~~~~~~~~~
   drivers/power/supply/rt9467-charger.c: At top level:
   drivers/power/supply/rt9467-charger.c:256:26: warning: 'rt9467_port_stat_names' defined but not used [-Wunused-const-variable=]
     256 | static const char *const rt9467_port_stat_names[RT9467_CHG_TYPE_MAX] = {
         |                          ^~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/FIELD_PREP +436 drivers/power/supply/rt9467-charger.c

   416	
   417	static int rt9467_get_adc_raw_data(struct rt9467_chg_data *data,
   418					   enum rt9467_adc_chan chan, int *val)
   419	{
   420		unsigned int adc_stat, reg_val, adc_sel;
   421		__be16 chan_raw_data;
   422		int ret;
   423	
   424		mutex_lock(&data->adc_lock);
   425	
   426		ret = rt9467_get_adc_sel(chan, &adc_sel);
   427		if (ret)
   428			goto adc_unlock;
   429	
   430		ret = regmap_write(data->regmap, RT9467_REG_CHG_ADC, 0);
   431		if (ret) {
   432			dev_err(data->dev, "Failed to clear ADC enable\n");
   433			goto adc_unlock;
   434		}
   435	
 > 436		reg_val = RT9467_MASK_ADC_START | FIELD_PREP(RT9467_MASK_ADC_IN_SEL, adc_sel);
   437		ret = regmap_write(data->regmap, RT9467_REG_CHG_ADC, reg_val);
   438		if (ret)
   439			goto adc_unlock;
   440	
   441		/* Minimum wait time for one channel processing */
   442		msleep(RT9467_ADCCONV_TIME_MS);
   443	
   444		ret = regmap_read_poll_timeout(data->regmap, RT9467_REG_CHG_ADC,
   445					       adc_stat,
   446					       !(adc_stat & RT9467_MASK_ADC_START),
   447					       MILLI, RT9467_ADCCONV_TIME_MS * MILLI);
   448		if (ret) {
   449			dev_err(data->dev, "Failed to wait ADC conversion, chan = %d\n", chan);
   450			goto adc_unlock;
   451		}
   452	
   453		ret = regmap_raw_read(data->regmap, RT9467_REG_ADC_DATA_H,
   454				      &chan_raw_data, sizeof(chan_raw_data));
   455		if (ret)
   456			goto adc_unlock;
   457	
   458		*val = be16_to_cpu(chan_raw_data);
   459	
   460	adc_unlock:
   461		mutex_unlock(&data->adc_lock);
   462		return ret;
   463	}
   464	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp