From owner-freebsd-arm@FreeBSD.ORG  Fri Apr 17 08:08:42 2015
Return-Path: <owner-freebsd-arm@FreeBSD.ORG>
Delivered-To: arm@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115])
 (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTPS id 50F1650E
 for <arm@freebsd.org>; Fri, 17 Apr 2015 08:08:42 +0000 (UTC)
Received: from home.opsec.eu (home.opsec.eu [IPv6:2001:14f8:200::1])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id 1373F6E9
 for <arm@freebsd.org>; Fri, 17 Apr 2015 08:08:41 +0000 (UTC)
Received: from pi by home.opsec.eu with local (Exim 4.85 (FreeBSD))
 (envelope-from <lists@opsec.eu>)
 id 1Yj1KJ-0006QQ-Jq; Fri, 17 Apr 2015 10:08:39 +0200
Date: Fri, 17 Apr 2015 10:08:39 +0200
From: Kurt Jaeger <lists@opsec.eu>
To: Daniel Braniss <danny@cs.huji.ac.il>
Cc: arm@freebsd.org
Subject: Re: help with coding a loadable kernel module
Message-ID: <20150417080839.GO2743@home.opsec.eu>
References: <EDB591F5-E056-4E53-9ED2-2A2E571F319C@cs.huji.ac.il>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <EDB591F5-E056-4E53-9ED2-2A2E571F319C@cs.huji.ac.il>
X-BeenThere: freebsd-arm@freebsd.org
X-Mailman-Version: 2.1.20
Precedence: list
List-Id: "Porting FreeBSD to ARM processors." <freebsd-arm.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-arm>,
 <mailto:freebsd-arm-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-arm/>
List-Post: <mailto:freebsd-arm@freebsd.org>
List-Help: <mailto:freebsd-arm-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-arm>,
 <mailto:freebsd-arm-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 17 Apr 2015 08:08:42 -0000

Hi!

> I know I'm embarking on a dangerous trip, but I want to use a Raspberry Pi
> and or a BeagleBone to read (and write) RFID cards.
> Since a driver is needed to use the spibus, I have 2 options while
> developing:
[...]
> So before I give up on option 2, is there some examples/help?

Are you aware of this book ?

http://www.nostarch.com/bsddrivers.htm

-- 
pi@opsec.eu            +49 171 3101372                         5 years to go !