[freescale-fslc:pr/639 3281/24603] drivers/input/touchscreen/max11801_ts.c:148:5: warning: no previous prototype for function 'max11801_read_adc'

[kernel test robot <lkp@intel.com>]

Hi Robin,

FYI, the error/warning still remains.

tree:   https://github.com/Freescale/linux-fslc pr/639
head:   857fbf7cebaba3b1ffccc558deee1d13ac0e11d7
commit: a414ba2296620d52817e64d747124b9f8efd2507 [3281/24603] MLK-11703-1: input: touchscreen: max11801_ts: Add DCM mode for max11801 ADC
config: riscv-randconfig-r015-20230831 (https://download.01.org/0day-ci/archive/20230831/202308311331.OoFDdmJW-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project.git f28c006a5895fc0e329fe15fead81e37457cb1d1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230831/202308311331.OoFDdmJW-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202308311331.OoFDdmJW-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/input/touchscreen/max11801_ts.c:148:5: warning: no previous prototype for function 'max11801_read_adc' [-Wmissing-prototypes]
   u32 max11801_read_adc(void)
       ^
   drivers/input/touchscreen/max11801_ts.c:148:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   u32 max11801_read_adc(void)
   ^
   static 
   1 warning generated.


vim +/max11801_read_adc +148 drivers/input/touchscreen/max11801_ts.c

   147	
 > 148	u32 max11801_read_adc(void)
   149	{
   150		u32 adc_data;
   151	
   152		if (!max11801_client) {
   153			pr_err("FAIL  max11801_client not initialize\n");
   154			return -1;
   155		}
   156		adc_data = max11801_dcm_sample_aux(max11801_client);
   157	
   158		return adc_data;
   159	}
   160	EXPORT_SYMBOL_GPL(max11801_read_adc);
   161	

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