From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752488AbbJKVCC (ORCPT ); Sun, 11 Oct 2015 17:02:02 -0400 Received: from www.linutronix.de ([62.245.132.108]:42186 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751266AbbJKVCA (ORCPT ); Sun, 11 Oct 2015 17:02:00 -0400 Date: Sun, 11 Oct 2015 23:01:17 +0200 (CEST) From: Thomas Gleixner To: Marc Zyngier cc: Jiang Liu , Jason Cooper , "Rafael J. Wysocki" , linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Lorenzo Pieralisi , Tomasz Nowicki , Hanjun Guo , Suravee Suthikulpanit , Graeme Gregory , Jake Oshins Subject: Re: [PATCH 00/16] Divorcing irqdomain and device_node In-Reply-To: <1444152989-31726-1-git-send-email-marc.zyngier@arm.com> Message-ID: References: <1444152989-31726-1-git-send-email-marc.zyngier@arm.com> User-Agent: Alpine 2.11 (DEB 23 2013-08-11) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 6 Oct 2015, Marc Zyngier wrote: > [This patch series used to be called "Making the generic ACPI GSI > layer irqdomain aware", but as I've radically changed my approach to > this problem, I've decided to reset the counters...] > > The irqdomain code is not entierely ACPI friendly, as it has some > built-in knowledge of the device-tree. Nothing too harmful, but enough > to scare the ARM ACPI developpers which end up with their own version > of the square wheel. And some of the ramifications actually run deeper > than initially expected. > > This series adapts the irqdomain code to use 'struct fwnode_handle' > instead of 'struct device_node' as the identifier for a domain > (compatibility interfaces are of course added). It also introduces a > generic IRQ specifier that firmware interfaces (DT or ACPI) can > directly use to configure interrupts, and allow the ACPI GSI code to > be plugged into this. > > As examples, we convert the ARM GIC ACPI support to use irqdomains as > originally intended, and rework the MSI code to also move away from > using device nodes when using irqdomains. > > Overall, this gives us a way to use irqdomains on both DT and ACPI > enabled platforms, having very little changes made to the actual > drivers (other than the probing infrastructure). Because we keep the > flow of information between the various layers identical between ACPI > and DT, we immediately benefit from the existing infrastructure. > > This has been test-booted on Juno, is based on 4.3-rc4, and available at: > > git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git irq/irq-domain-fwnode-v1 > > Marc Zyngier (16): > irqdomain: Use an accessor for the of_node field > irqdomain: Convert irqdomain->of_node to fwnode > irqdomain: Allow irq domain lookup by fwnode > irqdomain: Introduce a firmware-specific IRQ specifier structure > irqchip: Convert all alloc/xlate users from of_node to fwnode > irqdomain: Introduce irq_create_fwspec_mapping > irqdomain: Introduce irq_domain_create_{linear,tree} > irqdomain: Add a fwnode_handle allocator > acpi/gsi: Always perform an irq domain lookup > acpi/gsi: Add acpi_set_irq_model to initialize the GSI layer > irqchip/gic: Get rid of gic_init_bases() > irqchip/gic: Switch ACPI support to stacked domains > irqchip/gic: Kill the xlate method > acpi/gsi: Cleanup acpi_register_gsi > irqdomain: Introduce irq_domain_create_hierarchy > irqdomain/msi: Use fwnode instead of of_node I really like this one way better than the previous attempts and I couldn't find any real issue when going through them with a fine comb. I'd like to get that into 4.4, so I have to ask for the opinion of ACPI folks. Having an ack on those patches would be nice. Thanks, tglx