NPCM_I2CADDR_SAEN
iowrite8(bus->slave->addr | NPCM_I2CADDR_SAEN,
iowrite8((bus->slave->addr & 0x7F) | NPCM_I2CADDR_SAEN,
sa_reg = (addr & 0x7F) | FIELD_PREP(NPCM_I2CADDR_SAEN, enable);