RZ_MTU3_TIORH
[RZ_MTU3_TIORH] = _tiorh, \
[RZ_MTU3_TIORH] = _tiorh, \
[RZ_MTU3_TIORH] = _tiorh, \
val = rz_mtu3_8bit_ch_read(priv->mtu, RZ_MTU3_TIORH);
rz_mtu3_8bit_ch_write(priv->mtu, RZ_MTU3_TIORH, val);
rz_mtu3_8bit_ch_write(priv->mtu, RZ_MTU3_TIORH, RZ_MTU3_TIOR_OC_RETAIN);