MICROHZ_PER_HZ
freq_uhz = msa311_odr_table[odr].integral * MICROHZ_PER_HZ +
wait_ms = (MICROHZ_PER_HZ / freq_uhz) * MSEC_PER_SEC;
(DIV_ROUND_UP((x) * MICROHZ_PER_HZ, ADS1298_CLK_RATE_HZ))
uHz = val * MICROHZ_PER_HZ + val2;
do_div(sf, MICROHZ_PER_HZ);
sec = int_pow(10, mult) * MICROHZ_PER_HZ;