NPCM_I2CCST3
i2ccst3 = ioread8(bus->reg + NPCM_I2CCST3);
ioread8(bus->reg + NPCM_I2CCST3)))) {
val = ioread8(bus->reg + NPCM_I2CCST3);
iowrite8(val, bus->reg + NPCM_I2CCST3);