Messages in this thread | | | From | <> | Subject | Re: [PATCH v3] tty: serial: don't do termios for BTIF | Date | Wed, 17 Jun 2020 11:50:59 +0800 |
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From: Sean Wang <sean.wang@mediatek.com>
>On Thu, Apr 23, 2020 at 02:02:08AM +0800, sean.wang@mediatek.com wrote: >> From: Sean Wang <sean.wang@mediatek.com> >> >> 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?
The bluetooth driver would use BTIF device as a serdev.
The termios function would be called in kernelspace from ttyport_open and then to tty_set_termios defined in drivers/tty/serdev/serdev-ttyport.c.
> >thanks, > >greg k-h
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