[PATCH 7/8] ASoC: codecs: Add RK3308 internal audio codec driver

[kernel test robot]

Hi,

I love your patch! Perhaps something to improve:

[auto build test WARNING on broonie-sound/for-next]
[also build test WARNING on rockchip/for-next tiwai-sound/for-next linus/master v6.0-rc4 next-20220909]
[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/luca-ceresoli-bootlin-com/Add-support-for-the-internal-RK3308-audio-codec/20220907-222555
base:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next
config: hexagon-randconfig-r033-20220907 (https://download.01.org/0day-ci/archive/20220910/202209100733.bM1xaUdC-lkp@intel.com/config)
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 1546df49f5a6d09df78f569e4137ddb365a3e827)
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/786c160ad64ae5a6c5266184b12ecf2674db2fbe
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review luca-ceresoli-bootlin-com/Add-support-for-the-internal-RK3308-audio-codec/20220907-222555
        git checkout 786c160ad64ae5a6c5266184b12ecf2674db2fbe
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash sound/soc/codecs/

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

All warnings (new ones prefixed by >>):

   sound/soc/codecs/rk3308_codec.c:2007:6: warning: variable 'err' set but not used [-Wunused-but-set-variable]
           int err;
               ^
>> sound/soc/codecs/rk3308_codec.c:2104:34: warning: unused variable 'rk3308codec_of_match' [-Wunused-const-variable]
   static const struct of_device_id rk3308codec_of_match[] = {
                                    ^
   2 warnings generated.


vim +/rk3308codec_of_match +2104 sound/soc/codecs/rk3308_codec.c

  2103	
> 2104	static const struct of_device_id rk3308codec_of_match[] = {
  2105		{ .compatible = "rockchip,rk3308-codec", },
  2106		{},
  2107	};
  2108	MODULE_DEVICE_TABLE(of, rk3308codec_of_match);
  2109	

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