Re: [PATCH v4 6/9] iio: imu: inv_icm45600: add I2C driver for inv_icm45600 driver

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

Hi Remi,

kernel test robot noticed the following build warnings:

[auto build test WARNING on f8f559752d573a051a984adda8d2d1464f92f954]

url:    https://github.com/intel-lab-lkp/linux/commits/Remi-Buisson-via-B4-Relay/dt-bindings-iio-imu-Add-inv_icm45600/20250814-170722
base:   f8f559752d573a051a984adda8d2d1464f92f954
patch link:    https://lore.kernel.org/r/20250814-add_newport_driver-v4-6-4464b6600972%40tdk.com
patch subject: [PATCH v4 6/9] iio: imu: inv_icm45600: add I2C driver for inv_icm45600 driver
config: s390-allmodconfig (https://download.01.org/0day-ci/archive/20250815/202508151941.BweGaEVT-lkp@intel.com/config)
compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250815/202508151941.BweGaEVT-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/202508151941.BweGaEVT-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/iio/imu/inv_icm45600/inv_icm45600_core.c:908:12: warning: result of comparison of constant 32768 with expression of type 's16' (aka 'short') is always false [-Wtautological-constant-out-of-range-compare]
     908 |         if (*temp == INV_ICM45600_DATA_INVALID)
         |             ~~~~~ ^  ~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/iio/imu/inv_icm45600/inv_icm45600_core.c:785:12: warning: unused function 'inv_icm45600_suspend' [-Wunused-function]
     785 | static int inv_icm45600_suspend(struct device *dev)
         |            ^~~~~~~~~~~~~~~~~~~~
   drivers/iio/imu/inv_icm45600/inv_icm45600_core.c:820:12: warning: unused function 'inv_icm45600_resume' [-Wunused-function]
     820 | static int inv_icm45600_resume(struct device *dev)
         |            ^~~~~~~~~~~~~~~~~~~
   drivers/iio/imu/inv_icm45600/inv_icm45600_core.c:860:12: warning: unused function 'inv_icm45600_runtime_suspend' [-Wunused-function]
     860 | static int inv_icm45600_runtime_suspend(struct device *dev)
         |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/iio/imu/inv_icm45600/inv_icm45600_core.c:879:12: warning: unused function 'inv_icm45600_runtime_resume' [-Wunused-function]
     879 | static int inv_icm45600_runtime_resume(struct device *dev)
         |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~
   5 warnings generated.


vim +908 drivers/iio/imu/inv_icm45600/inv_icm45600_core.c

8891b99381240f Remi Buisson 2025-08-14  887  
2570c7e48ace35 Remi Buisson 2025-08-14  888  static int _inv_icm45600_temp_read(struct inv_icm45600_state *st, s16 *temp)
2570c7e48ace35 Remi Buisson 2025-08-14  889  {
2570c7e48ace35 Remi Buisson 2025-08-14  890  	struct inv_icm45600_sensor_conf conf = INV_ICM45600_SENSOR_CONF_KEEP_VALUES;
2570c7e48ace35 Remi Buisson 2025-08-14  891  	int ret;
2570c7e48ace35 Remi Buisson 2025-08-14  892  
2570c7e48ace35 Remi Buisson 2025-08-14  893  	/* Make sure a sensor is on. */
2570c7e48ace35 Remi Buisson 2025-08-14  894  	if (st->conf.gyro.mode == INV_ICM45600_SENSOR_MODE_OFF &&
2570c7e48ace35 Remi Buisson 2025-08-14  895  	    st->conf.accel.mode == INV_ICM45600_SENSOR_MODE_OFF) {
2570c7e48ace35 Remi Buisson 2025-08-14  896  		conf.mode = INV_ICM45600_SENSOR_MODE_LOW_POWER;
2570c7e48ace35 Remi Buisson 2025-08-14  897  		ret = inv_icm45600_set_accel_conf(st, &conf, NULL);
2570c7e48ace35 Remi Buisson 2025-08-14  898  		if (ret)
2570c7e48ace35 Remi Buisson 2025-08-14  899  			return ret;
2570c7e48ace35 Remi Buisson 2025-08-14  900  	}
2570c7e48ace35 Remi Buisson 2025-08-14  901  
2570c7e48ace35 Remi Buisson 2025-08-14  902  	ret = regmap_bulk_read(st->map, INV_ICM45600_REG_TEMP_DATA,
2570c7e48ace35 Remi Buisson 2025-08-14  903  				&st->buffer.u16, sizeof(st->buffer.u16));
2570c7e48ace35 Remi Buisson 2025-08-14  904  	if (ret)
2570c7e48ace35 Remi Buisson 2025-08-14  905  		return ret;
2570c7e48ace35 Remi Buisson 2025-08-14  906  
2570c7e48ace35 Remi Buisson 2025-08-14  907  	*temp = (s16)le16_to_cpup(&st->buffer.u16);
2570c7e48ace35 Remi Buisson 2025-08-14 @908  	if (*temp == INV_ICM45600_DATA_INVALID)
2570c7e48ace35 Remi Buisson 2025-08-14  909  		return -EINVAL;
2570c7e48ace35 Remi Buisson 2025-08-14  910  
2570c7e48ace35 Remi Buisson 2025-08-14  911  	return 0;
2570c7e48ace35 Remi Buisson 2025-08-14  912  }
2570c7e48ace35 Remi Buisson 2025-08-14  913  

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