Re: [PATCH] iio: light: al3010: read both ALS ADC registers again

[kernel test robot <lkp@intel.com>]

Hi Alexander,

kernel test robot noticed the following build warnings:

[auto build test WARNING on jic23-iio/togreg]
[also build test WARNING on linus/master v7.1-rc4 next-20260520]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Alexander-A-Klimov/iio-light-al3010-read-both-ALS-ADC-registers-again/20260521-024036
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg
patch link:    https://lore.kernel.org/r/20260520175855.538098-1-grandmaster%40al2klimov.de
patch subject: [PATCH] iio: light: al3010: read both ALS ADC registers again
config: sh-randconfig-r111-20260521 (https://download.01.org/0day-ci/archive/20260521/202605211105.cR7k7vyR-lkp@intel.com/config)
compiler: sh4-linux-gcc (GCC) 13.4.0
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260521/202605211105.cR7k7vyR-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202605211105.cR7k7vyR-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/iio/light/al3010.c:129:24: sparse: sparse: cast to restricted __le16

vim +129 drivers/iio/light/al3010.c

   108	
   109	static int al3010_read_raw(struct iio_dev *indio_dev,
   110				   struct iio_chan_spec const *chan, int *val,
   111				   int *val2, long mask)
   112	{
   113		struct al3010_data *data = iio_priv(indio_dev);
   114		int ret, gain;
   115		uint16_t raw;
   116	
   117		switch (mask) {
   118		case IIO_CHAN_INFO_RAW:
   119			/*
   120			 * ALS ADC value is stored in two adjacent registers:
   121			 * - low byte of output is stored at AL3010_REG_DATA_LOW
   122			 * - high byte of output is stored at AL3010_REG_DATA_LOW + 1
   123			 */
   124			ret = regmap_bulk_read(data->regmap, AL3010_REG_DATA_LOW,
   125					       &raw, sizeof(raw));
   126			if (ret)
   127				return ret;
   128	
 > 129			*val = le16_to_cpu(raw);
   130	
   131			return IIO_VAL_INT;
   132		case IIO_CHAN_INFO_SCALE:
   133			ret = regmap_read(data->regmap, AL3010_REG_CONFIG, &gain);
   134			if (ret)
   135				return ret;
   136	
   137			gain = FIELD_GET(AL3010_GAIN_MASK, gain);
   138			*val = al3010_scales[gain][0];
   139			*val2 = al3010_scales[gain][1];
   140	
   141			return IIO_VAL_INT_PLUS_MICRO;
   142		}
   143		return -EINVAL;
   144	}
   145	

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