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

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Date:	Thu, 18 Nov 2010 11:38:07 -0600
From:	Timur Tabi <timur@...escale.com>
To:	Greg KH <gregkh@...e.de>
CC:	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?

Greg KH wrote:

> No, you can use the /dev/serial/ links to determine exactly which is
> which depending on the pci id, and other unique identifiers (serial
> numbers, etc.)

I just booted a Linux kernel with the driver I just emailed you, and there's no
/dev/serial/ directory.  The only directories under /dev/ are 'shm' and 'pts',
both of which are empty.

I'm also running a Fedora 13 x86 system, just to see if I need a full modern OS
to see these files.  Again, there is no /dev/serial/, even though I have serial
ports.

Also not that since I'm not registering the byte channels as serial devices, I
wouldn't expect anything in /dev/serial/ to reference them.

What does my driver need to do in order for these /dev/xxxx/ entries to contain
that information?

> Is this somehow not public code?  What just changed in the past 15
> minutes?

Sorry, when I said "not public", I didn't mean it in a legal sense.  Now that I
think about it, I guess that doesn't make much sense.

-- 
Timur Tabi
Linux kernel developer at Freescale

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