Hi Alejandro, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: dd81e1c7d5fb126e5fbc5c9e334d7b3ec29a16a0 commit: 4d67dc1998f1890a9d22d03208037075ea9f2562 ASoC: max98927: Handle reset gpio when probing i2c date: 4 months ago config: alpha-randconfig-r034-20220123 (https://download.01.org/0day-ci/archive/20220124/202201241652.HcxYQUSR-lk...) compiler: alpha-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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 4d67dc1998f1890a9d22d03208037075ea9f2562 # 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=alpha SHELL=/bin/bash sound/soc/codecs/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): sound/soc/codecs/max98927.c: In function 'max98927_i2c_probe': 902 | = devm_gpiod_get_optional(&i2c->dev, "reset", GPIOD_OUT_HIGH); | ^~~~~~~~~~~~~~~~~~~~~~~ | devm_regulator_get_optional 902 | = devm_gpiod_get_optional(&i2c->dev, "reset", GPIOD_OUT_HIGH); | ^~~~~~~~~~~~~~ | GPIOF_INIT_HIGH sound/soc/codecs/max98927.c:902:63: note: each undeclared identifier is reported only once for each function it appears in 909 | gpiod_set_value_cansleep(max98927->reset_gpio, 0); | ^~~~~~~~~~~~~~~~~~~~~~~~ | gpio_set_value_cansleep cc1: some warnings being treated as errors vim +902 sound/soc/codecs/max98927.c 867 868 int ret = 0, value; 869 int reg = 0; 870 struct max98927_priv *max98927 = NULL; 871 872 max98927 = devm_kzalloc(&i2c->dev, 873 sizeof(*max98927), GFP_KERNEL); 874 875 if (!max98927) { 876 ret = -ENOMEM; 877 return ret; 878 } 879 i2c_set_clientdata(i2c, max98927); 880 881 /* update interleave mode info */ 882 if (!of_property_read_u32(i2c->dev.of_node, 883 "interleave_mode", &value)) { 884 if (value > 0) 885 max98927->interleave_mode = true; 886 else 887 max98927->interleave_mode = false; 888 } else 889 max98927->interleave_mode = false; 890 891 /* regmap initialization */ 892 max98927->regmap 893 = devm_regmap_init_i2c(i2c, &max98927_regmap); 894 if (IS_ERR(max98927->regmap)) { 895 ret = PTR_ERR(max98927->regmap); 896 dev_err(&i2c->dev, 897 "Failed to allocate regmap: %d\n", ret); 898 return ret; 899 } 900 901 max98927->reset_gpio 903 if (IS_ERR(max98927->reset_gpio)) { 904 ret = PTR_ERR(max98927->reset_gpio); 905 return dev_err_probe(&i2c->dev, ret, "failed to request GPIO reset pin"); 906 } 907 908 if (max98927->reset_gpio) { 910 /* Wait for i2c port to be ready */ 911 usleep_range(5000, 6000); 912 } 913 914 /* Check Revision ID */ 915 ret = regmap_read(max98927->regmap, 916 MAX98927_R01FF_REV_ID, &reg); 917 if (ret < 0) { 918 dev_err(&i2c->dev, 919 "Failed to read: 0x%02X\n", MAX98927_R01FF_REV_ID); 920 return ret; 921 } 922 dev_info(&i2c->dev, "MAX98927 revisionID: 0x%02X\n", reg); 923 924 /* voltage/current slot configuration */ 925 max98927_slot_config(i2c, max98927); 926 927 /* codec registeration */ 928 ret = devm_snd_soc_register_component(&i2c->dev, 929 &soc_component_dev_max98927, 930 max98927_dai, ARRAY_SIZE(max98927_dai)); 931 if (ret < 0) 932 dev_err(&i2c->dev, "Failed to register component: %d\n", ret); 933 934 return ret; 935 } 936 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org