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Message-ID: <20110708220654.GA19146@kroah.com>
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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