Re: [PATCH v2 2/3] iio: adc: sophgo-saradc: Add driver for Sophgo SARADC

[kernel test robot <lkp@xxxxxxxxx>]

Hi Thomas,

kernel test robot noticed the following build warnings:

[auto build test WARNING on d20f6b3d747c36889b7ce75ee369182af3decb6b]

url:    https://github.com/intel-lab-lkp/linux/commits/Thomas-Bonnefille/dt-bindings-iio-adc-sophgo-cv18xx-saradc-yaml-Add-Sophgo-SARADC-binding-documentation/20240706-040736
base:   d20f6b3d747c36889b7ce75ee369182af3decb6b
patch link:    https://lore.kernel.org/r/20240705-sg2002-adc-v2-2-83428c20a9b2%40bootlin.com
patch subject: [PATCH v2 2/3] iio: adc: sophgo-saradc: Add driver for Sophgo SARADC
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20240706/202407061311.ZEmwMY8m-lkp@xxxxxxxxx/config)
compiler: clang version 18.1.5 (https://github.com/llvm/llvm-project 617a15a9eac96088ae5e9134248d8236e34b91b1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240706/202407061311.ZEmwMY8m-lkp@xxxxxxxxx/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202407061311.ZEmwMY8m-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

>> drivers/iio/adc/sophgo-cv18xx-adc.c:85:3: warning: label followed by a declaration is a C23 extension [-Wc23-extensions]
      85 |                 struct cv18xx_adc *saradc = iio_priv(indio_dev);
         |                 ^
   1 warning generated.


vim +85 drivers/iio/adc/sophgo-cv18xx-adc.c

    78	
    79	static int cv18xx_adc_read_raw(struct iio_dev *indio_dev,
    80					  struct iio_chan_spec const *chan,
    81					  int *val, int *val2, long mask)
    82	{
    83		switch (mask) {
    84		case IIO_CHAN_INFO_RAW:
  > 85			struct cv18xx_adc *saradc = iio_priv(indio_dev);
    86			u32 sample;
    87			int ret;
    88	
    89			scoped_guard(mutex, &saradc->lock) {
    90				cv18xx_adc_start_measurement(saradc, chan->scan_index);
    91				ret = cv18xx_adc_wait(saradc);
    92				if (ret < 0)
    93					return ret;
    94	
    95				sample = readl(saradc->regs + CV18XX_ADC_CH_RESULT_REG(chan->scan_index));
    96			}
    97			if (!(sample & CV18XX_ADC_CH_VALID))
    98				return -ENODATA;
    99	
   100			*val = sample & CV18XX_ADC_CH_RESULT;
   101			return IIO_VAL_INT;
   102		case IIO_CHAN_INFO_SCALE:
   103			*val = 3300;
   104			*val2 = 12;
   105			return IIO_VAL_FRACTIONAL_LOG2;
   106		default:
   107			return -EINVAL;
   108		}
   109	}
   110	

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