AXI_DAC_2_PI_MEGA
phase = DIV_ROUND_CLOSEST_ULL((u64)raw * AXI_DAC_2_PI_MEGA, U16_MAX);
if (phase < 0 || phase > AXI_DAC_2_PI_MEGA)
raw = DIV_ROUND_CLOSEST_ULL((u64)phase * U16_MAX, AXI_DAC_2_PI_MEGA);