linux-kernel - Re: How do I choose an arbitrary minor number for my tty device?

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Message-ID: <20101118205647.677404ec@lxorguk.ukuu.org.uk>
Date:	Thu, 18 Nov 2010 20:56:47 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Timur Tabi <timur@...escale.com>
Cc:	Greg KH <gregkh@...e.de>, Arnd Bergmann <arnd@...db.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Scott Wood <scottwood@...escale.com>,
	Stuart Yoder <stuart.yoder@...escale.com>
Subject: Re: How do I choose an arbitrary minor number for my tty device?

On Thu, 18 Nov 2010 14:43:17 -0600
Timur Tabi <timur@...escale.com> wrote:

> Greg KH wrote:
> >> > One last question.  If I create multiple TTY devices, how do I tell the kernel
> >> > which one should be used for the console?
> 
> > On the command line.
> 
> Is there a way to do it in the driver itself?  Getting the boot loader to
> identify the specific byte channel for stdout isn't trivial.  It'd be nice if
> the driver could tell the tty layer, "BTW, this use this for the default console".

You can - provide the required method in your console driver and it'll
get used by /dev/console. Funnily enough a lot of other platform and
consoles need that too.

Alan
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