[PATCH] clk: bcm2835: Round UART input clock up

[kernel test robot]

Hi "Ivan,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on clk/clk-next]
[also build test WARNING on v5.18-rc1 next-20220404]
[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/intel-lab-lkp/linux/commits/Ivan-T-Ivanov/clk-bcm2835-Round-UART-input-clock-up/20220404-170105
base:   https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git clk-next
config: riscv-randconfig-r042-20220404 (https://download.01.org/0day-ci/archive/20220404/202204041850.zEjvoN6Y-lkp@intel.com/config)
compiler: riscv64-linux-gcc (GCC) 11.2.0
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/79c34b5361c9ab155da3175cfc964b67b9a06eab
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Ivan-T-Ivanov/clk-bcm2835-Round-UART-input-clock-up/20220404-170105
        git checkout 79c34b5361c9ab155da3175cfc964b67b9a06eab
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=riscv SHELL=/bin/bash drivers/clk/bcm/

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

All warnings (new ones prefixed by >>):

>> drivers/clk/bcm/clk-bcm2835.c:997:15: warning: no previous prototype for 'bcm2835_clock_round' [-Wmissing-prototypes]
     997 | unsigned long bcm2835_clock_round(unsigned long clk)
         |               ^~~~~~~~~~~~~~~~~~~


vim +/bcm2835_clock_round +997 drivers/clk/bcm/clk-bcm2835.c

   996	
 > 997	unsigned long bcm2835_clock_round(unsigned long clk)
   998	{
   999		unsigned long scaler;
  1000	
  1001		/*
  1002		 * If increasing a clock by less than 0.1% changes it
  1003		 * from ..999.. to ..000.., round up.
  1004		 */
  1005		scaler = 1;
  1006		while (scaler * 100000 < clk)
  1007			scaler *= 10;
  1008		if ((clk + scaler - 1) / scaler % 1000 == 0)
  1009			clk = (clk / scaler + 1) * scaler;
  1010	
  1011		return clk;
  1012	}
  1013	

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