RNG_v1_CTL_VCO_SHIFT
val |= (1 << RNG_v1_CTL_VCO_SHIFT) | RNG_CTL_ES1;
val |= (2 << RNG_v1_CTL_VCO_SHIFT) | RNG_CTL_ES2;
val |= (3 << RNG_v1_CTL_VCO_SHIFT) | RNG_CTL_ES3;
shift = RNG_v1_CTL_VCO_SHIFT;