Hi Liam, kernel test robot noticed the following build warnings: [auto build test WARNING on a5e505a99ca748583dbe558b691be1b26f05d678] url: https://github.com/intel-lab-lkp/linux/commits/Liam-Beguin/iio-adc-add-ltc2309-support/20230825-005720 base: a5e505a99ca748583dbe558b691be1b26f05d678 patch link: https://lore.kernel.org/r/20230824-ltc2309-v1-2-b87b4eb8030c%40gmail.com patch subject: [PATCH 2/3] iio: adc: ltc2309: switch to new .probe() config: i386-randconfig-061-20230906 (https://download.01.org/0day-ci/archive/20230906/202309060456.UYGqTIBd-lkp@xxxxxxxxx/config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230906/202309060456.UYGqTIBd-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/202309060456.UYGqTIBd-lkp@xxxxxxxxx/ sparse warnings: (new ones prefixed by >>) >> drivers/iio/adc/ltc2309.c:138:24: sparse: sparse: cast to restricted __be16 vim +138 drivers/iio/adc/ltc2309.c a967828958b014 Liam Beguin 2023-08-24 106 a967828958b014 Liam Beguin 2023-08-24 107 static int ltc2309_read_raw(struct iio_dev *indio_dev, a967828958b014 Liam Beguin 2023-08-24 108 struct iio_chan_spec const *chan, int *val, a967828958b014 Liam Beguin 2023-08-24 109 int *val2, long mask) a967828958b014 Liam Beguin 2023-08-24 110 { a967828958b014 Liam Beguin 2023-08-24 111 struct ltc2309 *ltc2309 = iio_priv(indio_dev); a967828958b014 Liam Beguin 2023-08-24 112 u16 buf; a967828958b014 Liam Beguin 2023-08-24 113 int ret; a967828958b014 Liam Beguin 2023-08-24 114 u8 din; a967828958b014 Liam Beguin 2023-08-24 115 a967828958b014 Liam Beguin 2023-08-24 116 mutex_lock(<c2309->lock); a967828958b014 Liam Beguin 2023-08-24 117 a967828958b014 Liam Beguin 2023-08-24 118 switch (mask) { a967828958b014 Liam Beguin 2023-08-24 119 case IIO_CHAN_INFO_RAW: a967828958b014 Liam Beguin 2023-08-24 120 din = FIELD_PREP(LTC2309_DIN_CH_MASK, chan->address & 0x0f) | a967828958b014 Liam Beguin 2023-08-24 121 FIELD_PREP(LTC2309_DIN_UNI, 1) | a967828958b014 Liam Beguin 2023-08-24 122 FIELD_PREP(LTC2309_DIN_SLEEP, 0); a967828958b014 Liam Beguin 2023-08-24 123 a967828958b014 Liam Beguin 2023-08-24 124 ret = i2c_smbus_write_byte(ltc2309->client, din); a967828958b014 Liam Beguin 2023-08-24 125 if (ret < 0) { a967828958b014 Liam Beguin 2023-08-24 126 dev_err(ltc2309->dev, "i2c command failed: %pe\n", a967828958b014 Liam Beguin 2023-08-24 127 ERR_PTR(ret)); a967828958b014 Liam Beguin 2023-08-24 128 goto out; a967828958b014 Liam Beguin 2023-08-24 129 } a967828958b014 Liam Beguin 2023-08-24 130 a967828958b014 Liam Beguin 2023-08-24 131 ret = i2c_master_recv(ltc2309->client, (char *)&buf, 2); a967828958b014 Liam Beguin 2023-08-24 132 if (ret < 0) { a967828958b014 Liam Beguin 2023-08-24 133 dev_err(ltc2309->dev, "i2c read failed: %pe\n", a967828958b014 Liam Beguin 2023-08-24 134 ERR_PTR(ret)); a967828958b014 Liam Beguin 2023-08-24 135 goto out; a967828958b014 Liam Beguin 2023-08-24 136 } a967828958b014 Liam Beguin 2023-08-24 137 a967828958b014 Liam Beguin 2023-08-24 @138 *val = be16_to_cpu(buf) >> 4; a967828958b014 Liam Beguin 2023-08-24 139 a967828958b014 Liam Beguin 2023-08-24 140 ret = IIO_VAL_INT; a967828958b014 Liam Beguin 2023-08-24 141 break; a967828958b014 Liam Beguin 2023-08-24 142 case IIO_CHAN_INFO_SCALE: a967828958b014 Liam Beguin 2023-08-24 143 *val = ltc2309->vref_mv; a967828958b014 Liam Beguin 2023-08-24 144 *val2 = LTC2309_ADC_RESOLUTION; a967828958b014 Liam Beguin 2023-08-24 145 ret = IIO_VAL_FRACTIONAL_LOG2; a967828958b014 Liam Beguin 2023-08-24 146 break; a967828958b014 Liam Beguin 2023-08-24 147 default: a967828958b014 Liam Beguin 2023-08-24 148 ret = -EINVAL; a967828958b014 Liam Beguin 2023-08-24 149 break; a967828958b014 Liam Beguin 2023-08-24 150 } a967828958b014 Liam Beguin 2023-08-24 151 a967828958b014 Liam Beguin 2023-08-24 152 out: a967828958b014 Liam Beguin 2023-08-24 153 mutex_unlock(<c2309->lock); a967828958b014 Liam Beguin 2023-08-24 154 return ret; a967828958b014 Liam Beguin 2023-08-24 155 } a967828958b014 Liam Beguin 2023-08-24 156 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
