TEST_TSEL_100
ret = iio_gts_find_gain_sel_for_scale_using_time(>s, TEST_TSEL_100,
ret = iio_gts_find_gain_sel_for_scale_using_time(>s, TEST_TSEL_100, 0,
GAIN_SCALE_ITIME_US(100 * 1000, TEST_TSEL_100, 2),