[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-20220907]
[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: riscv-randconfig-r042-20220907 (https://download.01.org/0day-ci/archive/20220908/202209080340.RFBeIVm2-lkp@intel.com/config)
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project c55b41d5199d2394dd6cdb8f52180d8b81d809d4)
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
        # install riscv cross compiling tool for clang build
        # apt-get install binutils-riscv64-linux-gnu
        # 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=riscv 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;
               ^
   1 warning generated.


vim +/err +2007 sound/soc/codecs/rk3308_codec.c

  2003	
  2004	static int rk3308_codec_parse_dt(struct rk3308_codec_priv *rk3308)
  2005	{
  2006		struct device_node *np = rk3308->dev->of_node;
> 2007		int err;
  2008	
  2009		/* Default value is 0 */
  2010		err = of_property_read_u32(np, "rockchip,micbias-avdd-multiplier",
  2011					   &rk3308->micbias_avdd_mult);
  2012		if (rk3308->micbias_avdd_mult >= RK3308_CODEC_MICBIAS_NUM)
  2013			return dev_err_probe(rk3308->dev, -EINVAL,
  2014					     "Invalid value for 'rockchip,micbias-avdd-multiplier'\n");
  2015	
  2016		return 0;
  2017	}
  2018	

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