Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757209Ab2HUMCy (ORCPT ); Tue, 21 Aug 2012 08:02:54 -0400 Received: from mail-ee0-f46.google.com ([74.125.83.46]:52444 "EHLO mail-ee0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756936Ab2HUMCv (ORCPT ); Tue, 21 Aug 2012 08:02:51 -0400 Date: Tue, 21 Aug 2012 13:02:46 +0100 From: Lee Jones To: Mark Brown Cc: Linus Walleij , Arnd Bergmann , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, STEricsson_nomadik_linux@list.st.com, linus.walleij@stericsson.com, Samuel Ortiz Subject: Re: [PATCH 5/8] mfd: Provide the PRCMU with its own IRQ domain Message-ID: <20120821120243.GF26899@gmail.com> References: <20120820083640.GH8450@gmail.com> <20120820121055.GA26991@opensource.wolfsonmicro.com> <20120820125531.GA20242@gmail.com> <20120820162923.GF26991@opensource.wolfsonmicro.com> <20120820164949.GB22749@gmail.com> <20120820175155.GH26991@opensource.wolfsonmicro.com> <20120821085618.GA26899@gmail.com> <20120821095026.GU26991@opensource.wolfsonmicro.com> <20120821105413.GD26899@gmail.com> <20120821110329.GA7995@opensource.wolfsonmicro.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20120821110329.GA7995@opensource.wolfsonmicro.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2318 Lines: 58 On Tue, Aug 21, 2012 at 12:03:29PM +0100, Mark Brown wrote: > On Tue, Aug 21, 2012 at 11:54:14AM +0100, Lee Jones wrote: > > On Tue, Aug 21, 2012 at 10:50:27AM +0100, Mark Brown wrote: > > > > What makes you say this? This is just a convenience for finding a > > > domain, irqdomains are *completely* indepentant of device tree. > > > How can you say that? I think you mean _can_ be independent of DT. If > > that's what you mean then yes, that's true. All I'm saying is we need > > No, I really mean what I'm saying. Device tree builds on irqdomains, > not the other way around. This is just semantics. > > another way to get hold of the domain, because the only way to obtain > > it without having direct access is via a device node. > > This doesn't actually hold. Okay, besides irq_find_host(struct device_node *np), how else can you fetch a domain from the irqdomain? > > > > - I know that you have interest in pushing the functionality into the > > > > IRQ domain subsystem, but I'm struggling to see how. It's calling into > > > > the IRQ domain where we're seeing issues in the first place, specifically > > > > irq_create_mapping(). How about if we passed 'irq_domain' as a parameter > > > > when requesting the IRQ? That way we can pass the correct IRQ without > > > > worry of conversion. If 'irq_domain' is !NULL the IRQ management subsystem > > > > can do the necessary conversions. If 'irq_domain' is NULL it continues to > > > > use the requested IRQ as a virq. > > > > This is totally orthogonal to doing the mapping in the MFD subsystem > > > which is the issue here. > > > Again, I only mentioned this because you said you wanted it to be handled > > by the irqdomain. > > The *mapping* should be being handled in irqdomain. > > > I'll code up the second suggestion now. > > I've already done this. What have you done already? Why make suggestions if you're just going to do the work yourself? -- Lee Jones Linaro ST-Ericsson Landing Team Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/