From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tony Lindgren Subject: Re: [PATCH v3 13/21] ARM: omap: convert wakeupgen to stacked domains Date: Wed, 14 Jan 2015 14:28:14 -0800 Message-ID: <20150114222814.GU2419@atomide.com> References: <1421087187-26988-1-git-send-email-marc.zyngier@arm.com> <1421087187-26988-14-git-send-email-marc.zyngier@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mho-02-ewr.mailhop.org ([204.13.248.72]:40091 "EHLO mho-02-ewr.mailhop.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750826AbbANWcT (ORCPT ); Wed, 14 Jan 2015 17:32:19 -0500 Content-Disposition: inline In-Reply-To: <1421087187-26988-14-git-send-email-marc.zyngier@arm.com> Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: Marc Zyngier Cc: Stephen Warren , Thierry Reding , Alexandre Courbot , Benoit Cousson , Nishanth Menon , Santosh Shilimkar , Shawn Guo , Sascha Hauer , Kukjin Kim , Simon Horman , Magnus Damm , Linus Walleij , Michal Simek , Rob Herring , Mark Rutland , Jason Cooper , Thomas Gleixner , Stefan Agner , linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-omap@vger.kernel.org * Marc Zyngier [150112 10:30]: > OMAP4/5 has been (ab)using the gic_arch_extn to provide > wakeup from suspend, and it makes a lot of sense to convert > this code to use stacked domains instead. > > This patch does just this, updating the DT files to actually > reflect what the HW provides. > > BIG FAT WARNING: because the DTs were so far lying by not > exposing the WUGEN HW block, kernels with this patch applied > won't have any suspend-resume facility when booted with old DTs, > and old kernels with updated DTs won't even boot. > > On a platform with this patch applied, the system looks like > this: > > root@bacon-fat:~# cat /proc/interrupts > CPU0 CPU1 > 16: 0 0 WUGEN 37 gp_timer > 19: 233799 155916 GIC 27 arch_timer > 23: 0 0 WUGEN 9 l3-dbg-irq > 24: 1 0 WUGEN 10 l3-app-irq > 27: 282 0 WUGEN 13 omap-dma-engine > 44: 0 0 4ae10000.gpio 13 DMA FYI, the legacy irq numbers are now all wrong since commit 9a1091ef0017 ("irqchip: gic: Support hierarchy irq domain."). Started a separate thread "Regression with legacy IRQ numbers caused by 9a1091ef0017" on it, will give these a try once that's sorted out. Regards, Tony From mboxrd@z Thu Jan 1 00:00:00 1970 From: tony@atomide.com (Tony Lindgren) Date: Wed, 14 Jan 2015 14:28:14 -0800 Subject: [PATCH v3 13/21] ARM: omap: convert wakeupgen to stacked domains In-Reply-To: <1421087187-26988-14-git-send-email-marc.zyngier@arm.com> References: <1421087187-26988-1-git-send-email-marc.zyngier@arm.com> <1421087187-26988-14-git-send-email-marc.zyngier@arm.com> Message-ID: <20150114222814.GU2419@atomide.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org * Marc Zyngier [150112 10:30]: > OMAP4/5 has been (ab)using the gic_arch_extn to provide > wakeup from suspend, and it makes a lot of sense to convert > this code to use stacked domains instead. > > This patch does just this, updating the DT files to actually > reflect what the HW provides. > > BIG FAT WARNING: because the DTs were so far lying by not > exposing the WUGEN HW block, kernels with this patch applied > won't have any suspend-resume facility when booted with old DTs, > and old kernels with updated DTs won't even boot. > > On a platform with this patch applied, the system looks like > this: > > root at bacon-fat:~# cat /proc/interrupts > CPU0 CPU1 > 16: 0 0 WUGEN 37 gp_timer > 19: 233799 155916 GIC 27 arch_timer > 23: 0 0 WUGEN 9 l3-dbg-irq > 24: 1 0 WUGEN 10 l3-app-irq > 27: 282 0 WUGEN 13 omap-dma-engine > 44: 0 0 4ae10000.gpio 13 DMA FYI, the legacy irq numbers are now all wrong since commit 9a1091ef0017 ("irqchip: gic: Support hierarchy irq domain."). Started a separate thread "Regression with legacy IRQ numbers caused by 9a1091ef0017" on it, will give these a try once that's sorted out. Regards, Tony