Hi Florian, url: https://github.com/0day-ci/linux/commits/Florian-Eckert/leds-Add-KTD20xx-RGB-LEDs-driver-from-Kinetic/20211109-181728 base: git://git.kernel.org/pub/scm/linux/kernel/git/pavel/linux-leds.git for-next config: i386-randconfig-m031-20211115 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> smatch warnings: drivers/leds/leds-ktd20xx.c:304 ktd20xx_probe_dt() warn: missing error code 'ret' drivers/leds/leds-ktd20xx.c:492 current_color0_store() warn: unsigned 'value[i]' is never less than zero. drivers/leds/leds-ktd20xx.c:566 current_color1_store() warn: unsigned 'value[i]' is never less than zero. drivers/leds/leds-ktd20xx.c:661 faderate_store() warn: unsigned 'faderate' is never less than zero. vim +/ret +304 drivers/leds/leds-ktd20xx.c 004e74105bb360 Florian Eckert 2021-11-09 281 static int ktd20xx_probe_dt(struct ktd20xx *chip) 004e74105bb360 Florian Eckert 2021-11-09 282 { 004e74105bb360 Florian Eckert 2021-11-09 283 struct fwnode_handle *child = NULL; 004e74105bb360 Florian Eckert 2021-11-09 284 struct led_init_data init_data = {}; 004e74105bb360 Florian Eckert 2021-11-09 285 struct led_classdev *led_cdev; 004e74105bb360 Florian Eckert 2021-11-09 286 struct ktd20xx_led *led; 004e74105bb360 Florian Eckert 2021-11-09 287 struct device *dev = &chip->client->dev; 004e74105bb360 Florian Eckert 2021-11-09 288 u8 value[3] = { 0, 0, 0 }; 004e74105bb360 Florian Eckert 2021-11-09 289 int i = 0; 004e74105bb360 Florian Eckert 2021-11-09 290 int ret = -EINVAL; 004e74105bb360 Florian Eckert 2021-11-09 291 int color; 004e74105bb360 Florian Eckert 2021-11-09 292 004e74105bb360 Florian Eckert 2021-11-09 293 device_for_each_child_node(chip->dev, child) { 004e74105bb360 Florian Eckert 2021-11-09 294 led = &chip->leds[i]; 004e74105bb360 Florian Eckert 2021-11-09 295 004e74105bb360 Florian Eckert 2021-11-09 296 ret = fwnode_property_read_u32(child, "reg", &led->index); 004e74105bb360 Florian Eckert 2021-11-09 297 if (ret) { 004e74105bb360 Florian Eckert 2021-11-09 298 dev_err(dev, "missing property: reg\n"); 004e74105bb360 Florian Eckert 2021-11-09 299 goto child_out; 004e74105bb360 Florian Eckert 2021-11-09 300 } 004e74105bb360 Florian Eckert 2021-11-09 301 if (led->index >= KTD20XX_MAX_LEDS) { 004e74105bb360 Florian Eckert 2021-11-09 302 dev_warn(dev, "property 'reg' must contain value between '0' and '%i'\n", 004e74105bb360 Florian Eckert 2021-11-09 303 KTD20XX_MAX_LEDS); ret = -EINVAL; 004e74105bb360 Florian Eckert 2021-11-09 @304 goto child_out; 004e74105bb360 Florian Eckert 2021-11-09 305 } 004e74105bb360 Florian Eckert 2021-11-09 306 004e74105bb360 Florian Eckert 2021-11-09 307 ret = fwnode_property_read_u32(child, "color", &color); 004e74105bb360 Florian Eckert 2021-11-09 308 if (ret) { 004e74105bb360 Florian Eckert 2021-11-09 309 dev_err(dev, "missing property: color\n"); 004e74105bb360 Florian Eckert 2021-11-09 310 goto child_out; 004e74105bb360 Florian Eckert 2021-11-09 311 } 004e74105bb360 Florian Eckert 2021-11-09 312 if (color != LED_COLOR_ID_RGB) { 004e74105bb360 Florian Eckert 2021-11-09 313 dev_warn(dev, "property 'color' must contain value 'LED_COLOR_ID_RGB'\n"); ret = -EINVAL; 004e74105bb360 Florian Eckert 2021-11-09 314 goto child_out; 004e74105bb360 Florian Eckert 2021-11-09 315 } 004e74105bb360 Florian Eckert 2021-11-09 316 004e74105bb360 Florian Eckert 2021-11-09 317 /* Get default color register selection */ 004e74105bb360 Florian Eckert 2021-11-09 318 if (fwnode_property_read_u8_array(child, "kinetic,color-selection", value, 3)) 004e74105bb360 Florian Eckert 2021-11-09 319 dev_warn(dev, "no kinetic,color-selection property found, use default rgbt color selection from register 0.\n"); 004e74105bb360 Florian Eckert 2021-11-09 320 004e74105bb360 Florian Eckert 2021-11-09 321 led->subled_info[0].color_index = LED_COLOR_ID_RED; 004e74105bb360 Florian Eckert 2021-11-09 322 led->subled_info[0].channel = 0; 004e74105bb360 Florian Eckert 2021-11-09 323 led->subled_info[0].intensity = value[0]; 004e74105bb360 Florian Eckert 2021-11-09 324 led->subled_info[1].color_index = LED_COLOR_ID_GREEN; 004e74105bb360 Florian Eckert 2021-11-09 325 led->subled_info[1].channel = 1; 004e74105bb360 Florian Eckert 2021-11-09 326 led->subled_info[1].intensity = value[1]; 004e74105bb360 Florian Eckert 2021-11-09 327 led->subled_info[2].color_index = LED_COLOR_ID_BLUE; 004e74105bb360 Florian Eckert 2021-11-09 328 led->subled_info[2].channel = 2; 004e74105bb360 Florian Eckert 2021-11-09 329 led->subled_info[2].intensity = value[2]; 004e74105bb360 Florian Eckert 2021-11-09 330 004e74105bb360 Florian Eckert 2021-11-09 331 led->mc_cdev.subled_info = led->subled_info; 004e74105bb360 Florian Eckert 2021-11-09 332 led->mc_cdev.num_colors = KTD20XX_LED_CHANNELS; 004e74105bb360 Florian Eckert 2021-11-09 333 004e74105bb360 Florian Eckert 2021-11-09 334 init_data.fwnode = child; 004e74105bb360 Florian Eckert 2021-11-09 335 004e74105bb360 Florian Eckert 2021-11-09 336 led->chip = chip; 004e74105bb360 Florian Eckert 2021-11-09 337 led_cdev = &led->mc_cdev.led_cdev; 004e74105bb360 Florian Eckert 2021-11-09 338 led_cdev->brightness_set_blocking = ktd20xx_brightness_set; 004e74105bb360 Florian Eckert 2021-11-09 339 004e74105bb360 Florian Eckert 2021-11-09 340 switch (led->index) { 004e74105bb360 Florian Eckert 2021-11-09 341 case RGB_A1: 004e74105bb360 Florian Eckert 2021-11-09 342 led->select = devm_regmap_field_alloc(chip->dev, 004e74105bb360 Florian Eckert 2021-11-09 343 chip->regmap, kt20xx_a1_select); 004e74105bb360 Florian Eckert 2021-11-09 344 led->enable = devm_regmap_field_alloc(chip->dev, 004e74105bb360 Florian Eckert 2021-11-09 345 chip->regmap, kt20xx_a1_enable); 004e74105bb360 Florian Eckert 2021-11-09 346 break; 004e74105bb360 Florian Eckert 2021-11-09 347 case RGB_A2: 004e74105bb360 Florian Eckert 2021-11-09 348 led->select = devm_regmap_field_alloc(chip->dev, 004e74105bb360 Florian Eckert 2021-11-09 349 chip->regmap, kt20xx_a2_select); 004e74105bb360 Florian Eckert 2021-11-09 350 led->enable = devm_regmap_field_alloc(chip->dev, 004e74105bb360 Florian Eckert 2021-11-09 351 chip->regmap, kt20xx_a2_enable); 004e74105bb360 Florian Eckert 2021-11-09 352 break; 004e74105bb360 Florian Eckert 2021-11-09 353 case RGB_A3: 004e74105bb360 Florian Eckert 2021-11-09 354 led->select = devm_regmap_field_alloc(chip->dev, 004e74105bb360 Florian Eckert 2021-11-09 355 chip->regmap, kt20xx_a3_select); 004e74105bb360 Florian Eckert 2021-11-09 356 led->enable = devm_regmap_field_alloc(chip->dev, 004e74105bb360 Florian Eckert 2021-11-09 357 chip->regmap, kt20xx_a3_enable); 004e74105bb360 Florian Eckert 2021-11-09 358 break; 004e74105bb360 Florian Eckert 2021-11-09 359 case RGB_A4: 004e74105bb360 Florian Eckert 2021-11-09 360 led->select = devm_regmap_field_alloc(chip->dev, 004e74105bb360 Florian Eckert 2021-11-09 361 chip->regmap, kt20xx_a4_select); 004e74105bb360 Florian Eckert 2021-11-09 362 led->enable = devm_regmap_field_alloc(chip->dev, 004e74105bb360 Florian Eckert 2021-11-09 363 chip->regmap, kt20xx_a4_enable); 004e74105bb360 Florian Eckert 2021-11-09 364 break; 004e74105bb360 Florian Eckert 2021-11-09 365 case RGB_B1: 004e74105bb360 Florian Eckert 2021-11-09 366 led->select = devm_regmap_field_alloc(chip->dev, 004e74105bb360 Florian Eckert 2021-11-09 367 chip->regmap, kt20xx_b1_select); 004e74105bb360 Florian Eckert 2021-11-09 368 led->enable = devm_regmap_field_alloc(chip->dev, 004e74105bb360 Florian Eckert 2021-11-09 369 chip->regmap, kt20xx_b1_enable); 004e74105bb360 Florian Eckert 2021-11-09 370 break; 004e74105bb360 Florian Eckert 2021-11-09 371 case RGB_B2: 004e74105bb360 Florian Eckert 2021-11-09 372 led->select = devm_regmap_field_alloc(chip->dev, 004e74105bb360 Florian Eckert 2021-11-09 373 chip->regmap, kt20xx_b2_select); 004e74105bb360 Florian Eckert 2021-11-09 374 led->enable = devm_regmap_field_alloc(chip->dev, 004e74105bb360 Florian Eckert 2021-11-09 375 chip->regmap, kt20xx_b2_enable); 004e74105bb360 Florian Eckert 2021-11-09 376 break; 004e74105bb360 Florian Eckert 2021-11-09 377 case RGB_B3: 004e74105bb360 Florian Eckert 2021-11-09 378 led->select = devm_regmap_field_alloc(chip->dev, 004e74105bb360 Florian Eckert 2021-11-09 379 chip->regmap, kt20xx_b3_select); 004e74105bb360 Florian Eckert 2021-11-09 380 led->enable = devm_regmap_field_alloc(chip->dev, 004e74105bb360 Florian Eckert 2021-11-09 381 chip->regmap, kt20xx_b3_enable); 004e74105bb360 Florian Eckert 2021-11-09 382 break; 004e74105bb360 Florian Eckert 2021-11-09 383 case RGB_B4: 004e74105bb360 Florian Eckert 2021-11-09 384 led->select = devm_regmap_field_alloc(chip->dev, 004e74105bb360 Florian Eckert 2021-11-09 385 chip->regmap, kt20xx_b4_select); 004e74105bb360 Florian Eckert 2021-11-09 386 led->enable = devm_regmap_field_alloc(chip->dev, 004e74105bb360 Florian Eckert 2021-11-09 387 chip->regmap, kt20xx_b4_enable); 004e74105bb360 Florian Eckert 2021-11-09 388 break; 004e74105bb360 Florian Eckert 2021-11-09 389 case RGB_C1: 004e74105bb360 Florian Eckert 2021-11-09 390 led->select = devm_regmap_field_alloc(chip->dev, 004e74105bb360 Florian Eckert 2021-11-09 391 chip->regmap, kt20xx_c1_select); 004e74105bb360 Florian Eckert 2021-11-09 392 led->enable = devm_regmap_field_alloc(chip->dev, 004e74105bb360 Florian Eckert 2021-11-09 393 chip->regmap, kt20xx_c1_enable); 004e74105bb360 Florian Eckert 2021-11-09 394 break; 004e74105bb360 Florian Eckert 2021-11-09 395 case RGB_C2: 004e74105bb360 Florian Eckert 2021-11-09 396 led->select = devm_regmap_field_alloc(chip->dev, 004e74105bb360 Florian Eckert 2021-11-09 397 chip->regmap, kt20xx_c2_select); 004e74105bb360 Florian Eckert 2021-11-09 398 led->enable = devm_regmap_field_alloc(chip->dev, 004e74105bb360 Florian Eckert 2021-11-09 399 chip->regmap, kt20xx_c2_enable); 004e74105bb360 Florian Eckert 2021-11-09 400 break; 004e74105bb360 Florian Eckert 2021-11-09 401 case RGB_C3: 004e74105bb360 Florian Eckert 2021-11-09 402 led->select = devm_regmap_field_alloc(chip->dev, 004e74105bb360 Florian Eckert 2021-11-09 403 chip->regmap, kt20xx_c3_select); 004e74105bb360 Florian Eckert 2021-11-09 404 led->enable = devm_regmap_field_alloc(chip->dev, 004e74105bb360 Florian Eckert 2021-11-09 405 chip->regmap, kt20xx_c3_enable); 004e74105bb360 Florian Eckert 2021-11-09 406 break; 004e74105bb360 Florian Eckert 2021-11-09 407 case RGB_C4: 004e74105bb360 Florian Eckert 2021-11-09 408 led->select = devm_regmap_field_alloc(chip->dev, 004e74105bb360 Florian Eckert 2021-11-09 409 chip->regmap, kt20xx_c4_select); 004e74105bb360 Florian Eckert 2021-11-09 410 led->enable = devm_regmap_field_alloc(chip->dev, 004e74105bb360 Florian Eckert 2021-11-09 411 chip->regmap, kt20xx_c4_enable); 004e74105bb360 Florian Eckert 2021-11-09 412 break; 004e74105bb360 Florian Eckert 2021-11-09 413 } 004e74105bb360 Florian Eckert 2021-11-09 414 004e74105bb360 Florian Eckert 2021-11-09 415 ret = devm_led_classdev_multicolor_register_ext(&chip->client->dev, 004e74105bb360 Florian Eckert 2021-11-09 416 &led->mc_cdev, 004e74105bb360 Florian Eckert 2021-11-09 417 &init_data); 004e74105bb360 Florian Eckert 2021-11-09 418 004e74105bb360 Florian Eckert 2021-11-09 419 if (ret) { 004e74105bb360 Florian Eckert 2021-11-09 420 dev_err(&chip->client->dev, "led register err: %d\n", ret); 004e74105bb360 Florian Eckert 2021-11-09 421 goto child_out; 004e74105bb360 Florian Eckert 2021-11-09 422 } 004e74105bb360 Florian Eckert 2021-11-09 423 004e74105bb360 Florian Eckert 2021-11-09 424 i++; 004e74105bb360 Florian Eckert 2021-11-09 425 fwnode_handle_put(child); 004e74105bb360 Florian Eckert 2021-11-09 426 } 004e74105bb360 Florian Eckert 2021-11-09 427 004e74105bb360 Florian Eckert 2021-11-09 428 return 0; 004e74105bb360 Florian Eckert 2021-11-09 429 004e74105bb360 Florian Eckert 2021-11-09 430 child_out: 004e74105bb360 Florian Eckert 2021-11-09 431 fwnode_handle_put(child); 004e74105bb360 Florian Eckert 2021-11-09 432 return ret; 004e74105bb360 Florian Eckert 2021-11-09 433 } 004e74105bb360 Florian Eckert 2021-11-09 434 004e74105bb360 Florian Eckert 2021-11-09 435 /* Device attribute for color0 register 004e74105bb360 Florian Eckert 2021-11-09 436 * 004e74105bb360 Florian Eckert 2021-11-09 437 * The device attribute colour1 is intended to adjust the colour space. 004e74105bb360 Florian Eckert 2021-11-09 438 * The colour strength can be controlled via the current in 125uA steps. 004e74105bb360 Florian Eckert 2021-11-09 439 * The maximum current for the individual channels is limited to 24mA. 004e74105bb360 Florian Eckert 2021-11-09 440 * To set a new RGB value, 3 values must be passed. This value may not be 004e74105bb360 Florian Eckert 2021-11-09 441 * less than 0 and also not greater than 194. The chip can only process the 004e74105bb360 Florian Eckert 2021-11-09 442 * maximum current of 24mA. This means that any value greater than 194 004e74105bb360 Florian Eckert 2021-11-09 443 * cannot be set. 004e74105bb360 Florian Eckert 2021-11-09 444 */ 004e74105bb360 Florian Eckert 2021-11-09 445 static ssize_t current_color0_show(struct device *dev, 004e74105bb360 Florian Eckert 2021-11-09 446 struct device_attribute *a, 004e74105bb360 Florian Eckert 2021-11-09 447 char *buf) 004e74105bb360 Florian Eckert 2021-11-09 448 { 004e74105bb360 Florian Eckert 2021-11-09 449 struct i2c_client *client = to_i2c_client(dev); 004e74105bb360 Florian Eckert 2021-11-09 450 struct ktd20xx *chip = i2c_get_clientdata(client); 004e74105bb360 Florian Eckert 2021-11-09 451 unsigned int value; 004e74105bb360 Florian Eckert 2021-11-09 452 int len = 0; 004e74105bb360 Florian Eckert 2021-11-09 453 004e74105bb360 Florian Eckert 2021-11-09 454 mutex_lock(&chip->lock); 004e74105bb360 Florian Eckert 2021-11-09 455 regmap_read(chip->regmap, KTD20XX_IRED0, &value); 004e74105bb360 Florian Eckert 2021-11-09 456 len += sprintf(buf + len, "%d", value); 004e74105bb360 Florian Eckert 2021-11-09 457 len += sprintf(buf + len, " "); 004e74105bb360 Florian Eckert 2021-11-09 458 004e74105bb360 Florian Eckert 2021-11-09 459 regmap_read(chip->regmap, KTD20XX_IGRN0, &value); 004e74105bb360 Florian Eckert 2021-11-09 460 len += sprintf(buf + len, "%d", value); 004e74105bb360 Florian Eckert 2021-11-09 461 len += sprintf(buf + len, " "); 004e74105bb360 Florian Eckert 2021-11-09 462 004e74105bb360 Florian Eckert 2021-11-09 463 regmap_read(chip->regmap, KTD20XX_IBLU0, &value); 004e74105bb360 Florian Eckert 2021-11-09 464 len += sprintf(buf + len, "%d", value); 004e74105bb360 Florian Eckert 2021-11-09 465 mutex_unlock(&chip->lock); 004e74105bb360 Florian Eckert 2021-11-09 466 004e74105bb360 Florian Eckert 2021-11-09 467 buf[len++] = '\n'; 004e74105bb360 Florian Eckert 2021-11-09 468 return len; 004e74105bb360 Florian Eckert 2021-11-09 469 } 004e74105bb360 Florian Eckert 2021-11-09 470 004e74105bb360 Florian Eckert 2021-11-09 471 static ssize_t current_color0_store(struct device *dev, 004e74105bb360 Florian Eckert 2021-11-09 472 struct device_attribute *a, 004e74105bb360 Florian Eckert 2021-11-09 473 const char *buf, size_t size) 004e74105bb360 Florian Eckert 2021-11-09 474 { 004e74105bb360 Florian Eckert 2021-11-09 475 struct i2c_client *client = to_i2c_client(dev); 004e74105bb360 Florian Eckert 2021-11-09 476 struct ktd20xx *chip = i2c_get_clientdata(client); 004e74105bb360 Florian Eckert 2021-11-09 477 unsigned int value[3]; 004e74105bb360 Florian Eckert 2021-11-09 478 int i; 004e74105bb360 Florian Eckert 2021-11-09 479 ssize_t ret; 004e74105bb360 Florian Eckert 2021-11-09 480 004e74105bb360 Florian Eckert 2021-11-09 481 ret = sscanf(buf, "%u %u %u", &value[0], &value[1], &value[2]); 004e74105bb360 Florian Eckert 2021-11-09 482 if (ret < 3) { 004e74105bb360 Florian Eckert 2021-11-09 483 ret = -EINVAL; 004e74105bb360 Florian Eckert 2021-11-09 484 goto err_out; 004e74105bb360 Florian Eckert 2021-11-09 485 } 004e74105bb360 Florian Eckert 2021-11-09 486 004e74105bb360 Florian Eckert 2021-11-09 487 for (i = 0; i < 3; i++) { 004e74105bb360 Florian Eckert 2021-11-09 488 if (value[i] > 194) { 004e74105bb360 Florian Eckert 2021-11-09 489 ret = -EINVAL; 004e74105bb360 Florian Eckert 2021-11-09 490 goto err_out; 004e74105bb360 Florian Eckert 2021-11-09 491 } 004e74105bb360 Florian Eckert 2021-11-09 @492 if (value[i] < 0) { ^^^^^^^^^^^^ Impossible 004e74105bb360 Florian Eckert 2021-11-09 493 ret = -EINVAL; 004e74105bb360 Florian Eckert 2021-11-09 494 goto err_out; 004e74105bb360 Florian Eckert 2021-11-09 495 } 004e74105bb360 Florian Eckert 2021-11-09 496 } 004e74105bb360 Florian Eckert 2021-11-09 497 004e74105bb360 Florian Eckert 2021-11-09 498 mutex_lock(&chip->lock); 004e74105bb360 Florian Eckert 2021-11-09 499 regmap_write(chip->regmap, KTD20XX_IRED0, value[0]); 004e74105bb360 Florian Eckert 2021-11-09 500 regmap_write(chip->regmap, KTD20XX_IGRN0, value[1]); 004e74105bb360 Florian Eckert 2021-11-09 501 regmap_write(chip->regmap, KTD20XX_IBLU0, value[2]); 004e74105bb360 Florian Eckert 2021-11-09 502 mutex_unlock(&chip->lock); 004e74105bb360 Florian Eckert 2021-11-09 503 return size; 004e74105bb360 Florian Eckert 2021-11-09 504 004e74105bb360 Florian Eckert 2021-11-09 505 err_out: 004e74105bb360 Florian Eckert 2021-11-09 506 return ret; 004e74105bb360 Florian Eckert 2021-11-09 507 } --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
