tree: https://git.kernel.org/pub/scm/linux/kernel/git/kbingham/rcar.git gmsl/dev head: d9d527273f201551a32925e292c996a8792e5a22 commit: 1ae4906559ab006ec29c3b53e899a03831216b13 [22/25] DNI: Regulator: Debug config: um-allmodconfig (attached as .config) compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0 reproduce: git checkout 1ae4906559ab006ec29c3b53e899a03831216b13 # save the attached .config to linux build tree make ARCH=um If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): In file included from include/linux/device.h:15:0, from include/linux/platform_device.h:13, from drivers/regulator/gpio-regulator.c:24: drivers/regulator/gpio-regulator.c: In function 'gpio_regulator_probe': dev_err(dev, "OF_GET_GPIO_REGULATOR_CONFIG %dn", PTR_ERR(config)); ^ include/linux/dev_printk.h:19:22: note: in definition of macro 'dev_fmt' #define dev_fmt(fmt) fmt ^~~ dev_err(dev, "OF_GET_GPIO_REGULATOR_CONFIG %dn", PTR_ERR(config)); ^~~~~~~ vim +245 drivers/regulator/gpio-regulator.c 223 224 static int gpio_regulator_probe(struct platform_device *pdev) 225 { 226 struct device *dev = &pdev->dev; 227 struct gpio_regulator_config *config = dev_get_platdata(dev); 228 struct device_node *np = dev->of_node; 229 struct gpio_regulator_data *drvdata; 230 struct regulator_config cfg = { }; 231 struct regulator_dev *rdev; 232 enum gpiod_flags gflags; 233 int ptr, ret, state, i; 234 235 drvdata = devm_kzalloc(dev, sizeof(struct gpio_regulator_data), 236 GFP_KERNEL); 237 if (drvdata == NULL) 238 return -ENOMEM; 239 240 if (np) { 241 config = of_get_gpio_regulator_config(dev, np, 242 &drvdata->desc); 243 244 if (IS_ERR(config)) { 246 return PTR_ERR(config); 247 } 248 } 249 250 dev_err(dev, "Probing GPIO Regulator\n"); 251 252 drvdata->desc.name = devm_kstrdup(dev, config->supply_name, GFP_KERNEL); 253 if (drvdata->desc.name == NULL) { 254 dev_err(dev, "Failed to allocate supply name\n"); 255 return -ENOMEM; 256 } 257 258 drvdata->gpiods = devm_kzalloc(dev, sizeof(struct gpio_desc *), 259 GFP_KERNEL); 260 if (!drvdata->gpiods) 261 return -ENOMEM; 262 263 for (i = 0; i < config->ngpios; i++) { 264 drvdata->gpiods[i] = devm_gpiod_get_index(dev, 265 NULL, 266 i, 267 config->gflags[i]); 268 if (IS_ERR(drvdata->gpiods[i])) 269 return PTR_ERR(drvdata->gpiods[i]); 270 /* This is good to know */ 271 gpiod_set_consumer_name(drvdata->gpiods[i], drvdata->desc.name); 272 } 273 drvdata->nr_gpios = config->ngpios; 274 275 drvdata->states = devm_kmemdup(dev, 276 config->states, 277 config->nr_states * 278 sizeof(struct gpio_regulator_state), 279 GFP_KERNEL); 280 if (drvdata->states == NULL) { 281 dev_err(dev, "Failed to allocate state data\n"); 282 return -ENOMEM; 283 } 284 drvdata->nr_states = config->nr_states; 285 286 drvdata->desc.owner = THIS_MODULE; 287 drvdata->desc.enable_time = config->startup_delay; 288 289 /* handle regulator type*/ 290 switch (config->type) { 291 case REGULATOR_VOLTAGE: 292 drvdata->desc.type = REGULATOR_VOLTAGE; 293 drvdata->desc.ops = &gpio_regulator_voltage_ops; 294 drvdata->desc.n_voltages = config->nr_states; 295 break; 296 case REGULATOR_CURRENT: 297 drvdata->desc.type = REGULATOR_CURRENT; 298 drvdata->desc.ops = &gpio_regulator_current_ops; 299 break; 300 default: 301 dev_err(dev, "No regulator type set\n"); 302 return -EINVAL; 303 } 304 305 /* build initial state from gpio init data. */ 306 state = 0; 307 for (ptr = 0; ptr < drvdata->nr_gpios; ptr++) { 308 if (config->gflags[ptr] == GPIOD_OUT_HIGH) 309 state |= (1 << ptr); 310 } 311 drvdata->state = state; 312 313 cfg.dev = dev; 314 cfg.init_data = config->init_data; 315 cfg.driver_data = drvdata; 316 cfg.of_node = np; 317 318 /* 319 * The signal will be inverted by the GPIO core if flagged so in the 320 * decriptor. 321 */ 322 if (config->enabled_at_boot) 323 gflags = GPIOD_OUT_HIGH | GPIOD_FLAGS_BIT_NONEXCLUSIVE; 324 else 325 gflags = GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE; 326 327 cfg.ena_gpiod = gpiod_get_optional(dev, "enable", gflags); 328 if (IS_ERR(cfg.ena_gpiod)) 329 return PTR_ERR(cfg.ena_gpiod); 330 331 rdev = devm_regulator_register(dev, &drvdata->desc, &cfg); 332 if (IS_ERR(rdev)) { 333 ret = PTR_ERR(rdev); 334 dev_err(dev, "Failed to register regulator: %d\n", ret); 335 return ret; 336 } 337 338 platform_set_drvdata(pdev, drvdata); 339 340 return 0; 341 } 342 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org