IIO_DEVICE_ATTR_RO
static IIO_DEVICE_ATTR_RO(hwfifo_watermark_min, 0);
static IIO_DEVICE_ATTR_RO(hwfifo_watermark_max, 0);
static IIO_DEVICE_ATTR_RO(hwfifo_enabled, 0);
static IIO_DEVICE_ATTR_RO(hwfifo_watermark, 0);
static IIO_DEVICE_ATTR_RO(sampling_frequency_available, 0);
static IIO_DEVICE_ATTR_RO(hwfifo_watermark_min, 0);
static IIO_DEVICE_ATTR_RO(hwfifo_watermark_max, 0);
static IIO_DEVICE_ATTR_RO(hwfifo_watermark, 0);
static IIO_DEVICE_ATTR_RO(hwfifo_enabled, 0);
static IIO_DEVICE_ATTR_RO(in_voltage_scale_available, 0);
static IIO_DEVICE_ATTR_RO(in_voltage_filter2_notch_center, 2);
static IIO_DEVICE_ATTR_RO(sampling_frequency_available, 0);
static IIO_DEVICE_ATTR_RO(cleaning_period_available, 0);
static IIO_DEVICE_ATTR_RO(hwfifo_watermark_max, 0);
static IIO_DEVICE_ATTR_RO(hwfifo_watermark_min, 0);
static IIO_DEVICE_ATTR_RO(hwfifo_watermark_max, 0);
static IIO_DEVICE_ATTR_RO(in_accel_value_available, 0);
static IIO_DEVICE_ATTR_RO(hwfifo_watermark, 0);
static IIO_DEVICE_ATTR_RO(hwfifo_enabled, 0);
static IIO_DEVICE_ATTR_RO(in_accel_range_raw_available, 0);
static IIO_DEVICE_ATTR_RO(sys_calibration_auto_status, 0);
static IIO_DEVICE_ATTR_RO(in_accel_calibration_auto_status, 0);
static IIO_DEVICE_ATTR_RO(in_gyro_calibration_auto_status, 0);
static IIO_DEVICE_ATTR_RO(in_magn_calibration_auto_status, 0);
static IIO_DEVICE_ATTR_RO(serialnumber, 0);
static IIO_DEVICE_ATTR_RO(in_illuminance_integration_time_available, 0);
static IIO_DEVICE_ATTR_RO(in_illuminance_scale_available, 0);
static IIO_DEVICE_ATTR_RO(tsl2591_in_illuminance_period_available, 0);
static IIO_DEVICE_ATTR_RO(in_illuminance_period_available, 0);
static IIO_DEVICE_ATTR_RO(in_angl1_thresh_rising_value_available, 0);
static IIO_DEVICE_ATTR_RO(in_angl1_thresh_rising_hysteresis_available, 0);