just got my hands on the new CM3, flashed a fresh raspbian image on it and noticed ttyAMA0 is not there (it has been used for bluetooth since raspberry pi 3). the only way to get it back is to change
/boot/config.txt and append the option
dtoverlay=pi3-disable-bt and run
systemctl disable hciuart. this will get you ttyAMA0 on rpi3 but it just doesn't work on the CM3.
is there something more i need to do ? can it be because the CM3 doesn't have Bluetooth and somehow needs some patch or something ?
PS: i really need that serial port and the mini-uart doesn't work for me.