NPCM_I2CCTL2
bus->reg + NPCM_I2CCTL2);
i2cctl2 = ioread8(bus->reg + NPCM_I2CCTL2);
iowrite8(i2cctl2, bus->reg + NPCM_I2CCTL2);
u8 i2cctl2 = ioread8(bus->reg + NPCM_I2CCTL2);
iowrite8(i2cctl2, bus->reg + NPCM_I2CCTL2);