ICMIER
rcar_i2c_write(priv, ICMIER, 0);
rcar_i2c_write(priv, ICMIER, read ? RCAR_IRQ_RECV : RCAR_IRQ_SEND);
rcar_i2c_write(priv, ICMIER, RCAR_IRQ_STOP);
rcar_i2c_write(priv, ICMIER, 0);
msr &= rcar_i2c_read(priv, ICMIER);
msr &= rcar_i2c_read(priv, ICMIER);