From mboxrd@z Thu Jan  1 00:00:00 1970
From: greg@kroah.com (Greg KH)
Date: Wed, 4 May 2011 08:32:51 -0700
Subject: how to see the minor numbers allocated to a driver?
In-Reply-To: <alpine.DEB.2.00.1105040922390.10333@localhost6.localdomain6>
References: <alpine.DEB.2.00.1105040922390.10333@localhost6.localdomain6>
Message-ID: <20110504153251.GA17160@kroah.com>
To: kernelnewbies@lists.kernelnewbies.org
List-Id: kernelnewbies.lists.kernelnewbies.org

On Wed, May 04, 2011 at 09:40:52AM -0400, Robert P. J. Day wrote:
> 
>   something i was curious about way back when -- given that
> register_chrdev_region() and alloc_chrdev_region() allow one to
> specify a range of minor numbers desired that doesn't necessarily have
> to start at zero, is there a way from user space to see what those
> numbers are after the device registration is complete?

/sys/dev/char/ after the driver has registered those minor numbers with
the driver core is your best bet.

hope this helps,

greg k-h