From patchwork Thu Jul 5 12:40:03 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Miquel Raynal X-Patchwork-Id: 10508903 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id BFAF2603D7 for ; Thu, 5 Jul 2018 12:53:50 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AE34F28E58 for ; Thu, 5 Jul 2018 12:53:50 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A23C128F68; Thu, 5 Jul 2018 12:53:50 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 0A11B28E5C for ; Thu, 5 Jul 2018 12:53:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=ONhwCfqu3UbLRg5zHUfmK1UI0mg75S0A/140WFMfh1s=; b=qBgRUfl2naTXrzfHPlMQns8Hxu VSGZSMUJx7iz+S8E0jPTsHnctVWSe95jPl/5dB/3fD96Be1T/bjrKgrnkZ+nf9LdxjE/K6aTJmY7J 7t33mSM18OHI2hmcsUSooWfEE+f5MRGv4q8ghmO8cTySayF1pCzdvU3IBy0VGsDCZ0DjcY+uwhqBM zPFtBedSBKLKjOv2PW7x7ixkMGW2/+Yve2yNywzfkCus1y0DJ5u2e6+8z+pdmaDDBeTUFhV0yDhUH Mmkc/+Olj1EfjAYTPjAB4G/1/P42DuC4ZDZta+iKFeZdhkqIz7xojbZQ0wNky31Pjx5ENgIWjGaY4 cCAfNW2w==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fb3lZ-0003UN-JQ; Thu, 05 Jul 2018 12:53:45 +0000 Received: from mail.bootlin.com ([62.4.15.54]) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fb3Z6-0002lp-Dc for linux-arm-kernel@lists.infradead.org; Thu, 05 Jul 2018 12:41:48 +0000 Received: by mail.bootlin.com (Postfix, from userid 110) id 92F54207F4; Thu, 5 Jul 2018 14:40:33 +0200 (CEST) Received: from localhost.localdomain (AAubervilliers-681-1-39-106.w90-88.abo.wanadoo.fr [90.88.158.106]) by mail.bootlin.com (Postfix) with ESMTPSA id C7F082084E; Thu, 5 Jul 2018 14:40:14 +0200 (CEST) From: Miquel Raynal To: Thomas Gleixner , Jason Cooper , Marc Zyngier , Catalin Marinas , Will Deacon , Andrew Lunn , Gregory Clement , Sebastian Hesselbarth Subject: [PATCH v4 06/14] irqchip/irq-mvebu-icu: support ICU subnodes Date: Thu, 5 Jul 2018 14:40:03 +0200 Message-Id: <20180705124011.7661-7-miquel.raynal@bootlin.com> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20180705124011.7661-1-miquel.raynal@bootlin.com> References: <20180705124011.7661-1-miquel.raynal@bootlin.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180705_054053_640301_55C17B3F X-CRM114-Status: GOOD ( 20.27 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, Haim Boot , Antoine Tenart , Hanna Hawa , Maxime Chevallier , Nadav Haklai , Rob Herring , Thomas Petazzoni , Miquel Raynal , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP The ICU can handle several type of interrupt, each of them being handled differently on AP side. On CP side, the ICU should be able to make the distinction between each interrupt group by pointing to the right parent. This is done through the introduction of new bindings, presenting the ICU node as the parent of multiple ICU sub-nodes, each of them being an interrupt type with a different interrupt parent. ICU interrupt 'clients' now directly point to the right sub-node, avoiding the need for the extra ICU_GRP_* parameter. ICU subnodes are probed automatically with devm_platform_populate(). If the node as no child, the probe function for NSRs will still be called 'manually' in order to preserve backward compatibility with DT using the old binding. Signed-off-by: Miquel Raynal --- drivers/irqchip/irq-mvebu-icu.c | 70 +++++++++++++++++++++++++++++++++-------- 1 file changed, 57 insertions(+), 13 deletions(-) diff --git a/drivers/irqchip/irq-mvebu-icu.c b/drivers/irqchip/irq-mvebu-icu.c index d09f220a2701..bb4f06833d17 100644 --- a/drivers/irqchip/irq-mvebu-icu.c +++ b/drivers/irqchip/irq-mvebu-icu.c @@ -40,6 +40,7 @@ struct mvebu_icu { struct irq_chip irq_chip; void __iomem *base; struct device *dev; + bool is_legacy; atomic_t initialized; }; @@ -105,24 +106,28 @@ mvebu_icu_irq_domain_translate(struct irq_domain *d, struct irq_fwspec *fwspec, unsigned long *hwirq, unsigned int *type) { struct mvebu_icu *icu = platform_msi_get_host_data(d); - unsigned int icu_group; + unsigned int param_count = icu->is_legacy ? 3 : 2; /* Check the count of the parameters in dt */ - if (WARN_ON(fwspec->param_count < 3)) { + if (WARN_ON(fwspec->param_count != param_count)) { dev_err(icu->dev, "wrong ICU parameter count %d\n", fwspec->param_count); return -EINVAL; } - /* Only ICU group type is handled */ - icu_group = fwspec->param[0]; - if (icu_group != ICU_GRP_NSR && icu_group != ICU_GRP_SR && - icu_group != ICU_GRP_SEI && icu_group != ICU_GRP_REI) { - dev_err(icu->dev, "wrong ICU group type %x\n", icu_group); - return -EINVAL; + if (icu->is_legacy) { + *hwirq = fwspec->param[1]; + *type = fwspec->param[2]; + if (fwspec->param[0] != ICU_GRP_NSR) { + dev_err(icu->dev, "wrong ICU group type %x\n", + fwspec->param[0]); + return -EINVAL; + } + } else { + *hwirq = fwspec->param[0]; + *type = fwspec->param[1]; } - *hwirq = fwspec->param[1]; if (*hwirq >= ICU_MAX_IRQS) { dev_err(icu->dev, "invalid interrupt number %ld\n", *hwirq); return -EINVAL; @@ -155,7 +160,10 @@ mvebu_icu_irq_domain_alloc(struct irq_domain *domain, unsigned int virq, goto free_irqd; } - icu_irqd->icu_group = fwspec->param[0]; + if (icu->is_legacy) + icu_irqd->icu_group = fwspec->param[0]; + else + icu_irqd->icu_group = ICU_GRP_NSR; icu_irqd->icu = icu; err = platform_msi_domain_alloc(domain, virq, nr_irqs); @@ -203,6 +211,13 @@ static const struct irq_domain_ops mvebu_icu_domain_ops = { .free = mvebu_icu_irq_domain_free, }; +static const struct of_device_id mvebu_icu_subset_of_match[] = { + { + .compatible = "marvell,cp110-icu-nsr", + }, + {}, +}; + static int mvebu_icu_subset_probe(struct platform_device *pdev) { struct device_node *msi_parent_dn; @@ -210,7 +225,14 @@ static int mvebu_icu_subset_probe(struct platform_device *pdev) struct irq_domain *irq_domain; struct mvebu_icu *icu; - icu = dev_get_drvdata(dev); + /* + * Device data being populated means we are using the legacy bindings. + * Using the parent device data means we are using the new bindings. + */ + if (dev_get_drvdata(dev)) + icu = dev_get_drvdata(dev); + else + icu = dev_get_drvdata(dev->parent); dev->msi_domain = of_msi_get_domain(dev, dev->of_node, DOMAIN_BUS_PLATFORM_MSI); @@ -233,6 +255,15 @@ static int mvebu_icu_subset_probe(struct platform_device *pdev) return 0; } +static struct platform_driver mvebu_icu_subset_driver = { + .probe = mvebu_icu_subset_probe, + .driver = { + .name = "mvebu-icu-subset", + .of_match_table = mvebu_icu_subset_of_match, + }, +}; +builtin_platform_driver(mvebu_icu_subset_driver); + static int mvebu_icu_probe(struct platform_device *pdev) { struct mvebu_icu *icu; @@ -259,6 +290,15 @@ static int mvebu_icu_probe(struct platform_device *pdev) if (!icu->irq_chip.name) return -ENOMEM; + /* + * Legacy bindings: ICU is one node with one MSI parent: force manually + * the probe of the NSR interrupts side. + * New bindings: ICU node has children, one per interrupt controller + * having its own MSI parent: call platform_populate(). + */ + if (!of_get_child_count(pdev->dev.of_node)) + icu->is_legacy = true; + icu->irq_chip.irq_mask = irq_chip_mask_parent; icu->irq_chip.irq_unmask = irq_chip_unmask_parent; icu->irq_chip.irq_eoi = irq_chip_eoi_parent; @@ -277,13 +317,17 @@ static int mvebu_icu_probe(struct platform_device *pdev) icu_int = readl_relaxed(icu->base + ICU_INT_CFG(i)); icu_grp = icu_int >> ICU_GROUP_SHIFT; - if (icu_grp == ICU_GRP_NSR) + if (icu_grp == ICU_GRP_NSR || + (icu_grp == ICU_GRP_SEI && !icu->is_legacy)) writel_relaxed(0x0, icu->base + ICU_INT_CFG(i)); } platform_set_drvdata(pdev, icu); - return mvebu_icu_subset_probe(pdev); + if (icu->is_legacy) + return mvebu_icu_subset_probe(pdev); + else + return devm_of_platform_populate(&pdev->dev); } static const struct of_device_id mvebu_icu_of_match[] = {