On Thu, Apr 23, 2020 at 02:02:08AM +0800, sean.wang@xxxxxxxxxxxx wrote: > From: Sean Wang <sean.wang@xxxxxxxxxxxx> > > Bluetooth Interface (BTIF) is designed dedicatedly for MediaTek SOC with > BT in order to be instead of the UART interface between BT module and Host > CPU, and not exported to user space to access. > > As the UART design, BTIF will be an APB slave and can transmit or receive > data by MCU access, but doesn't provide termios function like baudrate and > flow control setup. Why does it matter? If the connection isn't exported to userspace, who would run those termios functions on the port? thanks, greg k-h