iopiic_wait
error = iopiic_wait(sc, IIC_ISR_ITE, flags);
if ((error = iopiic_wait(sc, IIC_ISR_IRF | IIC_ISR_ALD, flags)) == 0)
error = iopiic_wait(sc, IIC_ISR_ITE | IIC_ISR_ALD, flags);