From patchwork Fri Aug 14 12:20:30 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Grygorii Strashko X-Patchwork-Id: 7014711 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id B28F0C05AC for ; Fri, 14 Aug 2015 12:48:09 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C8B00203B5 for ; Fri, 14 Aug 2015 12:48:08 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id EC6182039C for ; Fri, 14 Aug 2015 12:48:07 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZQENC-0002ab-LP; Fri, 14 Aug 2015 12:46:14 +0000 Received: from merlin.infradead.org ([2001:4978:20e::2]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZQENA-0002Zt-8Q for linux-arm-kernel@bombadil.infradead.org; Fri, 14 Aug 2015 12:46:12 +0000 Received: from bear.ext.ti.com ([192.94.94.41]) by merlin.infradead.org with esmtps (Exim 4.85 #2 (Red Hat Linux)) id 1ZQDzE-0004DW-NP for linux-arm-kernel@lists.infradead.org; Fri, 14 Aug 2015 12:21:29 +0000 Received: from dflxv15.itg.ti.com ([128.247.5.124]) by bear.ext.ti.com (8.13.7/8.13.7) with ESMTP id t7ECKhPO004377; Fri, 14 Aug 2015 07:20:43 -0500 Received: from DFLE73.ent.ti.com (dfle73.ent.ti.com [128.247.5.110]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id t7ECKh0q031124; Fri, 14 Aug 2015 07:20:43 -0500 Received: from dlep32.itg.ti.com (157.170.170.100) by DFLE73.ent.ti.com (128.247.5.110) with Microsoft SMTP Server id 14.3.224.2; Fri, 14 Aug 2015 07:20:43 -0500 Received: from localhost (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep32.itg.ti.com (8.14.3/8.13.8) with ESMTP id t7ECKgAV004246; Fri, 14 Aug 2015 07:20:43 -0500 From: Grygorii Strashko To: , , Subject: [PATCH v3 6/6] irqchip: crossbar: fix set_wake functionality Date: Fri, 14 Aug 2015 15:20:30 +0300 Message-ID: <1439554830-19502-7-git-send-email-grygorii.strashko@ti.com> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1439554830-19502-1-git-send-email-grygorii.strashko@ti.com> References: <1439554830-19502-1-git-send-email-grygorii.strashko@ti.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150814_082128_848342_5FB437A0 X-CRM114-Status: GOOD ( 11.68 ) X-Spam-Score: -7.9 (-------) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Grygorii Strashko , linux@arm.linux.org.uk, jason@lakedaemon.net, nsekhar@ti.com, linux-kernel@vger.kernel.org, balbi@ti.com, Sudeep Holla , linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-5.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The TI crossbar doesn't provides any facility to configure the wakeup sources, but it implements .irq_set_wake() callback: .irq_set_wake = irq_chip_set_wake_parent As result, the irq_chip_set_wake_parent() will try to execute .irq_set_wake() callback for parent IRQ domain, which is TI OMAP wakeupgen, but TI OMAP wakeupgen has IRQCHIP_SKIP_SET_WAKE flag set and do not implement .irq_set_wake() callback. Thus, irq_chip_set_wake_parent() will fail with -ENOSYS. In case of TI OMAP DRA7 the issue reproduced with following configuration: ARM GIC<-OMAP wakeupgen<-TI CBAR<-GPIO<-GPIO pcf857x<-gpio_key gpio_key is wakeup source Failure is reproduced during suspend/resume to RAM: suspend: - gpio_keys_suspend + enable_irq_wake + pcf857x_irq_set_wake + omap_gpio_wake_enable + TI CBAR irq_chip_set_wake_parent + OMAP wakeupgen has no .irq_set_wake() and -ENOSYS will be returned resume: - gpio_keys_resume + disable_irq_wake + irq_set_irq_wake + WARN(1, "Unbalanced IRQ %d wake disable\n", irq); Hence, fix it by adding IRQCHIP_SKIP_SET_WAKE flag to TI Crossbar and drop .irq_set_wake() at the same time. Cc: Sudeep Holla Signed-off-by: Grygorii Strashko --- drivers/irqchip/irq-crossbar.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/irqchip/irq-crossbar.c b/drivers/irqchip/irq-crossbar.c index f5a72cc..c12bb93 100644 --- a/drivers/irqchip/irq-crossbar.c +++ b/drivers/irqchip/irq-crossbar.c @@ -68,9 +68,9 @@ static struct irq_chip crossbar_chip = { .irq_mask = irq_chip_mask_parent, .irq_unmask = irq_chip_unmask_parent, .irq_retrigger = irq_chip_retrigger_hierarchy, - .irq_set_wake = irq_chip_set_wake_parent, .irq_set_type = irq_chip_set_type_parent, - .flags = IRQCHIP_MASK_ON_SUSPEND, + .flags = IRQCHIP_MASK_ON_SUSPEND | + IRQCHIP_SKIP_SET_WAKE, #ifdef CONFIG_SMP .irq_set_affinity = irq_chip_set_affinity_parent, #endif