fnoop
commented
4 years ago https://github.com/raspberrypi/linux/tree/rpi-4.19.y/arch/arm/boot/dts/overlays
Name: pi3-disable-bt
Info: This overlay has been renamed disable-bt, keeping pi3-disable-bt as an
alias for backwards compatibility.
Load: <Deprecated>
Name: disable-bt
Info: Disable onboard Bluetooth on Pi 3B, 3B+, 3A+, 4B and Zero W, restoring
UART0/ttyAMA0 over GPIOs 14 & 15.
N.B. To disable the systemd service that initialises the modem so it
doesn't use the UART, use 'sudo systemctl disable hciuart'.
Load: dtoverlay=disable-bt
Params: <None>
https://github.com/goodrobots/maverick/blob/stable/manifests/maverick-modules/maverick_hardware/manifests/raspberry.pp#L160 https://github.com/raspberrypi/firmware/issues/643