Re: [PATCH v1 2/2] iio: imu: st_lsm6dsx: Remove useless dev_fwnode() calls

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

Hi Andy,

kernel test robot noticed the following build warnings:

[auto build test WARNING on jic23-iio/togreg]
[also build test WARNING on linus/master v6.11-rc5 next-20240827]
[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/Andy-Shevchenko/iio-imu-st_lsm6dsx-Use-iio_read_acpi_mount_matrix-helper/20240827-052617
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg
patch link:    https://lore.kernel.org/r/20240826212344.866928-3-andy.shevchenko%40gmail.com
patch subject: [PATCH v1 2/2] iio: imu: st_lsm6dsx: Remove useless dev_fwnode() calls
config: arc-randconfig-001-20240827 (https://download.01.org/0day-ci/archive/20240827/202408272259.MsdckhWn-lkp@intel.com/config)
compiler: arc-elf-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240827/202408272259.MsdckhWn-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/202408272259.MsdckhWn-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c: In function 'st_lsm6dsx_get_drdy_reg':
>> drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c:2137:62: warning: passing argument 3 of 'device_property_read_u32' makes pointer from integer without a cast [-Wint-conversion]
    2137 |         if (device_property_read_u32(dev, "st,drdy-int-pin", drdy_pin) < 0) {
         |                                                              ^~~~~~~~
         |                                                              |
         |                                                              int
   In file included from include/linux/acpi.h:16,
                    from drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c:76:
   include/linux/property.h:229:71: note: expected 'u32 *' {aka 'unsigned int *'} but argument is of type 'int'
     229 |                                            const char *propname, u32 *val)
         |                                                                  ~~~~~^~~
   drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c:2137:13: warning: 'drdy_pin' is used uninitialized [-Wuninitialized]
    2137 |         if (device_property_read_u32(dev, "st,drdy-int-pin", drdy_pin) < 0) {
         |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c:2135:22: note: 'drdy_pin' was declared here
    2135 |         int err = 0, drdy_pin;
         |                      ^~~~~~~~


vim +/device_property_read_u32 +2137 drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c

  2129	
  2130	static int
  2131	st_lsm6dsx_get_drdy_reg(struct st_lsm6dsx_hw *hw,
  2132				const struct st_lsm6dsx_reg **drdy_reg)
  2133	{
  2134		struct device *dev = hw->dev;
  2135		int err = 0, drdy_pin;
  2136	
> 2137		if (device_property_read_u32(dev, "st,drdy-int-pin", drdy_pin) < 0) {
  2138			struct st_sensors_platform_data *pdata;
  2139	
  2140			pdata = (struct st_sensors_platform_data *)dev->platform_data;
  2141			drdy_pin = pdata ? pdata->drdy_int_pin : 1;
  2142		}
  2143	
  2144		switch (drdy_pin) {
  2145		case 1:
  2146			hw->irq_routing = &hw->settings->irq_config.irq1_func;
  2147			*drdy_reg = &hw->settings->irq_config.irq1;
  2148			break;
  2149		case 2:
  2150			hw->irq_routing = &hw->settings->irq_config.irq2_func;
  2151			*drdy_reg = &hw->settings->irq_config.irq2;
  2152			break;
  2153		default:
  2154			dev_err(hw->dev, "unsupported data ready pin\n");
  2155			err = -EINVAL;
  2156			break;
  2157		}
  2158	
  2159		return err;
  2160	}
  2161	

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