From mboxrd@z Thu Jan 1 00:00:00 1970 From: Guenter Roeck Subject: Re: ACPI vs Device Tree - moving forward Date: Fri, 23 Aug 2013 21:45:10 -0700 Message-ID: <52183A56.5020707@roeck-us.net> References: <1810269.JOHnJ0H7P9@vostro.rjw.lan> <20130822000306.GA21785@srcf.ucam.org> <1377300343.5259.84.camel@dvhart-mobl4.amr.corp.intel.com> <20130823233805.GA1801@srcf.ucam.org> <1377301548.5259.91.camel@dvhart-mobl4.amr.corp.intel.com> <20130824001345.GD14810@roeck-us.net> <20130824011036.GA2827@srcf.ucam.org> <20130824014723.GA17488@roeck-us.net> <20130824023806.GA3388@srcf.ucam.org> <521820A3.2010501@roeck-us.net> <20130824030628.GA3668@srcf.ucam.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail.active-venture.com ([67.228.131.205]:56073 "EHLO mail.active-venture.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754579Ab3HXEpR (ORCPT ); Sat, 24 Aug 2013 00:45:17 -0400 In-Reply-To: <20130824030628.GA3668@srcf.ucam.org> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Matthew Garrett Cc: Darren Hart , "Rafael J. Wysocki" , Linus Walleij , "linux-kernel@vger.kernel.org" , ACPI Devel Maling List , "H. Peter Anvin" On 08/23/2013 08:06 PM, Matthew Garrett wrote: > On Fri, Aug 23, 2013 at 07:55:31PM -0700, Guenter Roeck wrote: > >> Question is: Does this work _today_ with any existing driver, where >> one interrupt is served through ACPI and another as 'standard' Linux >> interrupt ? If yes, it must be working, and using fdt to describe >> the interrupt mapping for the non-ACPI interrupt should not make >> a difference. If no, the problem does not really have anything >> to do with fdt. > > There's no such thing as an ACPI interrupt, it's just a data source in > the same way that PnP used to be. _CRS refers to platform interrupts. > Ah, you are catching my lack of ACPI knowledge. Rephrasing the question: "What happens when you have an ACPI device that contains an interrupt in _CRS and contains a different interrupt in an embedded FDT block?" Does the situation occur today, ie does it ever happen that one interrupt for a device is specified (if that is the correct term) in _CRS and another by some other means ? Guenter