linux-kernel - Re: Writing a console/tty driver -- how to use tty

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Message-Id: <201010282257.33898.arnd@arndb.de>
Date:	Thu, 28 Oct 2010 22:57:33 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Timur Tabi <timur@...escale.com>
Cc:	gregkh <gregkh@...e.de>, lkml <linux-kernel@...r.kernel.org>
Subject: Re: Writing a console/tty driver -- how to use tty_port?

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.

	Arnd
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