Hi Laurent, Thank you for the patch! Yet something to improve: [auto build test ERROR on iio/togreg] [also build test ERROR on robh/for-next v5.14-rc2 next-20210723] [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/0day-ci/linux/commits/Laurent-Pinchart/iio-ti-dac5571-... base: https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg config: arc-randconfig-r012-20210723 (attached as .config) compiler: arceb-elf-gcc (GCC) 10.3.0 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/0day-ci/linux/commit/aea544dbbcecf5d723ede9b42a2da945a... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Laurent-Pinchart/iio-ti-dac5571-Add-TI-DAC081C081-support/20210724-023333 git checkout aea544dbbcecf5d723ede9b42a2da945ac5038f9 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross ARCH=arc 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 >>): drivers/iio/dac/ti-dac5571.c: In function 'dac5571_probe': 331 | chip_id = (uintptr_t)of_device_get_match_data(dev); | ^~~~~~~~~~~~~~~~~~~~~~~~ | device_get_match_data cc1: some warnings being treated as errors vim +331 drivers/iio/dac/ti-dac5571.c 306 307 static int dac5571_probe(struct i2c_client *client, 308 const struct i2c_device_id *id) 309 { 310 struct device *dev = &client->dev; 311 const struct dac5571_spec *spec; 312 struct dac5571_data *data; 313 struct iio_dev *indio_dev; 314 enum chip_id chip_id; 315 int ret, i; 316 317 indio_dev = devm_iio_device_alloc(dev, sizeof(*data)); 318 if (!indio_dev) 319 return -ENOMEM; 320 321 data = iio_priv(indio_dev); 322 i2c_set_clientdata(client, indio_dev); 323 data->client = client; 324 325 indio_dev->info = &dac5571_info; 326 indio_dev->name = id->name; 327 indio_dev->modes = INDIO_DIRECT_MODE; 328 indio_dev->channels = dac5571_channels; 329 330 if (dev->of_node) 332 else 333 chip_id = id->driver_data; 334 335 spec = &dac5571_spec[chip_id]; 336 337 indio_dev->num_channels = spec->num_channels; 338 data->spec = spec; 339 340 data->vref = devm_regulator_get(dev, "vref"); 341 if (IS_ERR(data->vref)) 342 return PTR_ERR(data->vref); 343 344 ret = regulator_enable(data->vref); 345 if (ret < 0) 346 return ret; 347 348 mutex_init(&data->lock); 349 350 switch (spec->num_channels) { 351 case 1: 352 data->dac5571_cmd = dac5571_cmd_single; 353 data->dac5571_pwrdwn = dac5571_pwrdwn_single; 354 break; 355 case 4: 356 data->dac5571_cmd = dac5571_cmd_quad; 357 data->dac5571_pwrdwn = dac5571_pwrdwn_quad; 358 break; 359 default: 360 goto err; 361 } 362 363 for (i = 0; i < spec->num_channels; i++) { 364 ret = data->dac5571_cmd(data, i, 0); 365 if (ret) { 366 dev_err(dev, "failed to initialize channel %d to 0\n", i); 367 goto err; 368 } 369 } 370 371 ret = iio_device_register(indio_dev); 372 if (ret) 373 goto err; 374 375 return 0; 376 377 err: 378 regulator_disable(data->vref); 379 return ret; 380 } 381 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org