Hi Roan, I love your patch! Perhaps something to improve: [auto build test WARNING on robh/for-next] [also build test WARNING on linux/master linus/master v5.14] [cannot apply to iio/togreg next-20210831] [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/Roan-van-Dijk/iio-chemical-Add-support-for-Sensirion-SCD4x-CO2-sensor/20210831-202025 base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next config: hexagon-randconfig-r036-20210901 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 4b1fde8a2b681dad2ce0c082a5d6422caa06b0bc) 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/605896bbee687d465d4ae58d910878e9b85f0035 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Roan-van-Dijk/iio-chemical-Add-support-for-Sensirion-SCD4x-CO2-sensor/20210831-202025 git checkout 605896bbee687d465d4ae58d910878e9b85f0035 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=hexagon If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/iio/chemical/scd4x.c:503:20: warning: no previous prototype for function 'scd4x_suspend' [-Wmissing-prototypes] int __maybe_unused scd4x_suspend(struct device *dev) ^ drivers/iio/chemical/scd4x.c:503:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int __maybe_unused scd4x_suspend(struct device *dev) ^ static >> drivers/iio/chemical/scd4x.c:517:20: warning: no previous prototype for function 'scd4x_resume' [-Wmissing-prototypes] int __maybe_unused scd4x_resume(struct device *dev) ^ drivers/iio/chemical/scd4x.c:517:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int __maybe_unused scd4x_resume(struct device *dev) ^ static >> drivers/iio/chemical/scd4x.c:613:5: warning: no previous prototype for function 'scd4x_probe' [-Wmissing-prototypes] int scd4x_probe(struct i2c_client *client, const struct i2c_device_id *id) ^ drivers/iio/chemical/scd4x.c:613:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int scd4x_probe(struct i2c_client *client, const struct i2c_device_id *id) ^ static 3 warnings generated. vim +/scd4x_suspend +503 drivers/iio/chemical/scd4x.c 502 > 503 int __maybe_unused scd4x_suspend(struct device *dev) 504 { 505 struct iio_dev *indio_dev = dev_get_drvdata(dev); 506 struct scd4x_state *state = iio_priv(indio_dev); 507 int ret; 508 509 ret = scd4x_send_command(state, CMD_STOP_MEAS); 510 if (ret) 511 return ret; 512 513 return regulator_disable(state->vdd); 514 } 515 EXPORT_SYMBOL(scd4x_suspend); 516 > 517 int __maybe_unused scd4x_resume(struct device *dev) 518 { 519 struct iio_dev *indio_dev = dev_get_drvdata(dev); 520 struct scd4x_state *state = iio_priv(indio_dev); 521 int ret; 522 523 ret = regulator_enable(state->vdd); 524 if (ret) 525 return ret; 526 527 return scd4x_send_command(state, CMD_START_MEAS); 528 } 529 EXPORT_SYMBOL(scd4x_resume); 530 531 static void scd4x_stop_meas(void *data) 532 { 533 struct scd4x_state *state = data; 534 535 scd4x_send_command(state, CMD_STOP_MEAS); 536 } 537 538 static void scd4x_disable_regulator(void *data) 539 { 540 struct scd4x_state *state = data; 541 542 regulator_disable(state->vdd); 543 } 544 545 static irqreturn_t scd4x_trigger_handler(int irq, void *p) 546 { 547 struct iio_poll_func *pf = p; 548 struct iio_dev *indio_dev = pf->indio_dev; 549 struct scd4x_state *state = iio_priv(indio_dev); 550 struct { 551 int data[3]; 552 int64_t ts __aligned(8); 553 } scan; 554 int ret; 555 556 mutex_lock(&state->lock); 557 ret = scd4x_read_poll(state); 558 memset(&scan, 0, sizeof(scan)); 559 memcpy(scan.data, state->meas, sizeof(state->meas)); 560 mutex_unlock(&state->lock); 561 if (ret) 562 goto out; 563 564 iio_push_to_buffers_with_timestamp(indio_dev, &scan, iio_get_time_ns(indio_dev)); 565 out: 566 iio_trigger_notify_done(indio_dev->trig); 567 return IRQ_HANDLED; 568 } 569 570 static int scd4x_set_trigger_state(struct iio_trigger *trig, bool state) 571 { 572 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); 573 struct scd4x_state *st = iio_priv(indio_dev); 574 575 if (state) 576 enable_irq(st->irq); 577 else 578 disable_irq(st->irq); 579 580 return 0; 581 } 582 583 static const struct iio_trigger_ops scd4x_trigger_ops = { 584 .set_trigger_state = scd4x_set_trigger_state, 585 .validate_device = iio_trigger_validate_own_device, 586 }; 587 588 static int scd4x_setup_trigger(struct iio_dev *indio_dev) 589 { 590 struct device *dev = indio_dev->dev.parent; 591 struct iio_trigger *trig; 592 int ret; 593 594 trig = devm_iio_trigger_alloc(dev, "%s-dev%d", indio_dev->name, 595 iio_device_id(indio_dev)); 596 if (!trig) { 597 dev_err(dev, "failed to allocate trigger\n"); 598 return -ENOMEM; 599 } 600 601 trig->ops = &scd4x_trigger_ops; 602 iio_trigger_set_drvdata(trig, indio_dev); 603 604 ret = devm_iio_trigger_register(dev, trig); 605 if (ret) 606 return ret; 607 608 indio_dev->trig = iio_trigger_get(trig); 609 610 return ret; 611 } 612 > 613 int scd4x_probe(struct i2c_client *client, const struct i2c_device_id *id) 614 { 615 static const unsigned long scd4x_scan_masks[] = { 0x07, 0x00 }; 616 struct device *dev = &client->dev; 617 struct iio_dev *indio_dev; 618 struct scd4x_state *state; 619 int ret; 620 621 indio_dev = devm_iio_device_alloc(dev, sizeof(*state)); 622 if (!indio_dev) 623 return -ENOMEM; 624 625 state = iio_priv(indio_dev); 626 mutex_init(&state->lock); 627 state->dev = dev; 628 crc8_populate_msb(scd4x_crc8_table, SCD4X_CRC8_POLYNOMIAL); 629 630 indio_dev->info = &scd4x_info; 631 indio_dev->name = client->name; 632 indio_dev->channels = scd4x_channels; 633 indio_dev->num_channels = ARRAY_SIZE(scd4x_channels); 634 indio_dev->modes = INDIO_DIRECT_MODE | INDIO_BUFFER_TRIGGERED; 635 indio_dev->available_scan_masks = scd4x_scan_masks; 636 637 state->vdd = devm_regulator_get(dev, "vdd"); 638 if (IS_ERR(state->vdd)) 639 return dev_err_probe(dev, PTR_ERR(state->vdd), "failed to get regulator\n"); 640 641 ret = regulator_enable(state->vdd); 642 if (ret) 643 return ret; 644 645 ret = devm_add_action_or_reset(dev, scd4x_disable_regulator, state); 646 if (ret) 647 return ret; 648 649 ret = scd4x_send_command(state, CMD_STOP_MEAS); 650 if (ret) { 651 dev_err(dev, "failed to stop measurement: %d\n", ret); 652 return ret; 653 } 654 655 /* execution time */ 656 msleep_interruptible(500); 657 658 if (state->irq > 0) { 659 ret = scd4x_setup_trigger(indio_dev); 660 if (ret) { 661 dev_err(dev, "failed to setup trigger: %d\n", ret); 662 return ret; 663 } 664 } 665 666 ret = devm_iio_triggered_buffer_setup(dev, indio_dev, NULL, scd4x_trigger_handler, NULL); 667 if (ret) 668 return ret; 669 670 ret = devm_iio_device_register(dev, indio_dev); 671 if (ret) { 672 dev_err(dev, "failed to register iio device\n"); 673 return ret; 674 } 675 676 ret = scd4x_send_command(state, CMD_START_MEAS); 677 if (ret) { 678 dev_err(dev, "failed to start measurement: %d\n", ret); 679 return ret; 680 } 681 682 ret = devm_add_action_or_reset(dev, scd4x_stop_meas, state); 683 if (ret) 684 return ret; 685 686 return 0; 687 } 688 EXPORT_SYMBOL(scd4x_probe); 689 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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