Re: is there a struct uart_driver like struct i2c_driver

[Greg KH <greg@kroah.com>]

On Mon, Aug 18, 2014 at 04:56:24PM +0200, Cestonaro Thilo wrote:
> On 18.08.2014 15:50, Greg KH wrote:
> >On Mon, Aug 18, 2014 at 03:43:27PM +0200, Cestonaro Thilo wrote:
> >>Hey,
> >>
> >>do I need to do something like:
> >>----
> >>f = filp_open("/dev/ttyS0", O_RDWR | O_NOCTTY | O_NDELAY, 0600);
> >>fs=get_fs();
> >>set_fs(KERNEL_DS);
> >>---
> >>Is there really no API for a uart attached device to communicate with it?
> >>
> >>That would be the last thing I thought of :(.
> >Wait, you want to talk to a serial port from within the kernel?  No,
> >don't open the device node, just talk directly to the tty layer.  An
> >example of code that does this is some of the bluetooth layer.
> >
> >good luck,
> >
> >greg k-h
> >
> 
> From the hci_uart stuff I got to the conclusion that I need to implement
> a tty line discipline driver and change the corresponding tty's line
> discipline
> to my own one.
> 
> Is this the best way or did I miss something? I ask again, cause writing a
> tty line discipline
> looks rather complicate then straight forward and before I start doing it,
> I want to be sure to not run against a wall :).

You might want to step back and describe what you are wanting to do in
the first place before wanting to add a new line discipline.

thanks,

greg k-h