From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933935AbcDMOio (ORCPT ); Wed, 13 Apr 2016 10:38:44 -0400 Received: from mail-wm0-f65.google.com ([74.125.82.65]:34823 "EHLO mail-wm0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932463AbcDMOim (ORCPT ); Wed, 13 Apr 2016 10:38:42 -0400 Date: Wed, 13 Apr 2016 16:38:38 +0200 From: Ingo Molnar To: William Breathitt Gray Cc: tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, gregkh@linuxfoundation.org, x86@kernel.org, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, alsa-devel@alsa-project.org Subject: Re: [PATCH 0/4] Decouple X86_32 dependency from the ISA Kconfig option Message-ID: <20160413143838.GD5867@gmail.com> References: <20160413072602.GA7629@gmail.com> <20160413121515.GA23870@sophia> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160413121515.GA23870@sophia> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * William Breathitt Gray wrote: > On Wed, Apr 13, 2016 at 09:26:02AM +0200, Ingo Molnar wrote: > >What's the practical motivation of this? What exact hardware is this for? > > > >Thanks, > > > > Ingo > > The PC/104 bus is equivalent to the ISA bus regarding software > communication. Many small form factor systems have a PC/104 bus where > PC/104 cards may be stacked. Nowadays, these systems are commonly > running 64-bit processors such as the Intel Atom. > > I would like to utilize the ISA bus driver to support these PC/104 > devices (see http://lkml.org/lkml/2016/4/7/418), but the ISA > configuration option has an arbitrary X86_32 dependency. Decoupling the > X86_32 dependency from the ISA configuration option will allow these > PC/104 drivers to build for 64-bit architectures. > > The existing kernel drivers which I intend to utilize the ISA bus driver > in a X86_64 architecture for PC/104 support are the ACCES 104-DIO-48E > GPIO driver, the ACCES 104-IDI-48 GPIO driver, the ACCES 104-IDIO-16 > GPIO driver, and the Apex Embedded Systems STX104 DAC driver. I have > several more PC/104 devices for which I wish to write drivers, but I > would like to resolve this ISA bus driver situation before submitting > new code. Ah, ok, so it's for enabling real hardware, not just a cleanup, right? You might want to put that info into the boilerplate mail or so. I'm perfectly fine with all the patches that touch x86 code: Acked-by: Ingo Molnar I suppose you'd like to have these in the driver tree, all in one place? Thanks, Ingo From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ingo Molnar Subject: Re: [PATCH 0/4] Decouple X86_32 dependency from the ISA Kconfig option Date: Wed, 13 Apr 2016 16:38:38 +0200 Message-ID: <20160413143838.GD5867@gmail.com> References: <20160413072602.GA7629@gmail.com> <20160413121515.GA23870@sophia> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <20160413121515.GA23870@sophia> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: William Breathitt Gray Cc: alsa-devel@alsa-project.org, linux-scsi@vger.kernel.org, gregkh@linuxfoundation.org, x86@kernel.org, linux-kernel@vger.kernel.org, mingo@redhat.com, hpa@zytor.com, tglx@linutronix.de List-Id: linux-scsi@vger.kernel.org * William Breathitt Gray wrote: > On Wed, Apr 13, 2016 at 09:26:02AM +0200, Ingo Molnar wrote: > >What's the practical motivation of this? What exact hardware is this for? > > > >Thanks, > > > > Ingo > > The PC/104 bus is equivalent to the ISA bus regarding software > communication. Many small form factor systems have a PC/104 bus where > PC/104 cards may be stacked. Nowadays, these systems are commonly > running 64-bit processors such as the Intel Atom. > > I would like to utilize the ISA bus driver to support these PC/104 > devices (see http://lkml.org/lkml/2016/4/7/418), but the ISA > configuration option has an arbitrary X86_32 dependency. Decoupling the > X86_32 dependency from the ISA configuration option will allow these > PC/104 drivers to build for 64-bit architectures. > > The existing kernel drivers which I intend to utilize the ISA bus driver > in a X86_64 architecture for PC/104 support are the ACCES 104-DIO-48E > GPIO driver, the ACCES 104-IDI-48 GPIO driver, the ACCES 104-IDIO-16 > GPIO driver, and the Apex Embedded Systems STX104 DAC driver. I have > several more PC/104 devices for which I wish to write drivers, but I > would like to resolve this ISA bus driver situation before submitting > new code. Ah, ok, so it's for enabling real hardware, not just a cleanup, right? You might want to put that info into the boilerplate mail or so. I'm perfectly fine with all the patches that touch x86 code: Acked-by: Ingo Molnar I suppose you'd like to have these in the driver tree, all in one place? Thanks, Ingo