Re: Writing a console/tty driver -- how to use tty_port?

[Alan Cox]

On Thu, 28 Oct 2010 22:57:33 +0200
Arnd Bergmann <arnd@xxxxxxxx> wrote:

> On Wednesday 27 October 2010 23:04:13 Timur Tabi wrote:
> > Do you have an updated version of Tiny TTY that uses tty_port structures?  I'm
> > trying to write a new TTY driver for a device that is not a UART, and I'm having
> > a hard time finding a good example.  I suspect I need to understand the tty_port
> > structure, but I can't find any documentation for it.
> 
> If the device is not a UART, the best option may be to make the driver
> a backend to the hvc driver, like e.g. drivers/char/hvc_tile.c.
> 
> This works for all devices with or without interrupts that don't need
> to set up the communication parameters but simply provide a read/write
> character interface.

I really don't understand the love of hvc when the hvc drivers seem to be
bigger than native tty_port code and haul a whole blob of extra midlayer
glue into the system.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/