PCH_DREF_CONTROL
uint32 clkRef = read32(PCH_DREF_CONTROL);
write32(PCH_DREF_CONTROL, newRef);
read32(PCH_DREF_CONTROL);
__func__, read32(PCH_DREF_CONTROL));
write32(PCH_DREF_CONTROL, newRef);
read32(PCH_DREF_CONTROL);
__func__, read32(PCH_DREF_CONTROL));
write32(PCH_DREF_CONTROL, newRef);
read32(PCH_DREF_CONTROL);
__func__, read32(PCH_DREF_CONTROL));
write32(PCH_DREF_CONTROL, newRef);
read32(PCH_DREF_CONTROL);
__func__, read32(PCH_DREF_CONTROL));