linux-kernel - Re: tty/powerpc: introduce the ePAPR embedded hypervisor byte channel driver

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Date:	Fri, 8 Jul 2011 15:06:54 -0700
From:	Greg KH <greg@...ah.com>
To:	Timur Tabi <timur@...escale.com>
Cc:	kumar.gala@...escale.com, benh@...nel.crashing.org,
	akpm@...nel.org, linuxppc-dev@...ts.ozlabs.org,
	linux-kernel@...r.kernel.org, linux-console@...r.kernel.org,
	alan@...rguk.ukuu.org.uk, arnd@...db.de
Subject: Re: tty/powerpc: introduce the ePAPR embedded hypervisor byte
 channel driver

On Thu, May 19, 2011 at 08:34:52AM -0000, Timur Tabi wrote:
> The ePAPR embedded hypervisor specification provides an API for "byte
> channels", which are serial-like virtual devices for sending and receiving
> streams of bytes.  This driver provides Linux kernel support for byte
> channels via three distinct interfaces:
> 
> 1) An early-console (udbg) driver.  This provides early console output
> through a byte channel.  The byte channel handle must be specified in a
> Kconfig option.
> 
> 2) A normal console driver.  Output is sent to the byte channel designated
> for stdout in the device tree.  The console driver is for handling kernel
> printk calls.
> 
> 3) A tty driver, which is used to handle user-space input and output.  The
> byte channel used for the console is designated as the default tty.
> 
> Signed-off-by: Timur Tabi <timur@...escale.com>

Doesn't apply at all to the tty-next tree, so I can't apply it here :(

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