From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261294AbUKNM0m (ORCPT ); Sun, 14 Nov 2004 07:26:42 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261295AbUKNM0l (ORCPT ); Sun, 14 Nov 2004 07:26:41 -0500 Received: from mail.gmx.de ([213.165.64.20]:48063 "HELO mail.gmx.net") by vger.kernel.org with SMTP id S261294AbUKNM0k (ORCPT ); Sun, 14 Nov 2004 07:26:40 -0500 X-Authenticated: #4399952 Date: Sun, 14 Nov 2004 13:27:10 +0100 From: Florian Schmidt To: linux-os@analogic.com Cc: linux-os@chaos.analogic.com, Linux kernel Subject: Re: RTC Chip and IRQ8 on 2.6.9 Message-ID: <20041114132710.09533649@mango.fruits.de> In-Reply-To: References: X-Mailer: Sylpheed-Claws 0.9.12b (GTK+ 1.2.10; i386-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 12 Nov 2004 11:47:10 -0500 (EST) linux-os wrote: > > I must use the RTC and IRQ8 in a driver being ported from > 2.4.20 to 2.6.9. When I attempt request_irq(8,...), it > returns -EBUSY. I have disabled everything in .config > that has "RTC" in it. > > The RTC interrupt is used to precisely time the sequencing > of a precision A/D converter. It is mandatory that I use > it because the precise interval is essential for its > IIR filter that produces 20 bits of resolution from a > 16 bit A/D. > > 8: 1 IO-APIC-edge rtc maybe it's the HPET timer providing rtc emulation? flo