[jic23-iio:testing 23/47] drivers/iio/dac/adi-axi-dac.c:731 axi_dac_bus_set_io_mode() warn: always true condition '(mode >= 0) => (0-u32max >= 0)'

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git testing
head:   315198c0a370da031f5c3d504b99f771a0c545ab
commit: 493122c53af1915b4b5b5f47a8c446973ebff052 [23/47] iio: dac: adi-axi-dac: add bus mode setup
config: m68k-randconfig-r071-20250204 (https://download.01.org/0day-ci/archive/20250204/202502040758.DJqHqhLO-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 14.2.0

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/202502040758.DJqHqhLO-lkp@intel.com/

smatch warnings:
drivers/iio/dac/adi-axi-dac.c:731 axi_dac_bus_set_io_mode() warn: always true condition '(mode >= 0) => (0-u32max >= 0)'

vim +731 drivers/iio/dac/adi-axi-dac.c

   724	
   725	static int axi_dac_bus_set_io_mode(struct iio_backend *back,
   726					   enum ad3552r_io_mode mode)
   727	{
   728		struct axi_dac_state *st = iio_backend_get_priv(back);
   729		int ival, ret;
   730	
 > 731		if (!(mode >= AD3552R_IO_MODE_SPI && mode <= AD3552R_IO_MODE_QSPI))
   732			return -EINVAL;
   733	
   734		guard(mutex)(&st->lock);
   735	
   736		ret = regmap_update_bits(st->regmap, AXI_DAC_CUSTOM_CTRL_REG,
   737				AXI_DAC_CUSTOM_CTRL_MULTI_IO_MODE,
   738				FIELD_PREP(AXI_DAC_CUSTOM_CTRL_MULTI_IO_MODE, mode));
   739		if (ret)
   740			return ret;
   741	
   742		return regmap_read_poll_timeout(st->regmap, AXI_DAC_UI_STATUS_REG, ival,
   743				FIELD_GET(AXI_DAC_UI_STATUS_IF_BUSY, ival) == 0, 10,
   744				100 * KILO);
   745	}
   746	

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