Hciattach is used to attach a serial UART to the Bluetooth stack as HCI transport interface.
Supported IDs are (manufacturer id, product id)
9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600
Supported vendor devices are automatically initialised to their respective best settings.
Note: This option will only be valid for hardware which support hardware specific power management enable option from host.
Manual page by Nils Faerber <nils@kernelconcepts.de>