From patchwork Mon Mar 8 06:05:38 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?TWFyay1QSyBUc2FpICjolKHmspvliZsp?= X-Patchwork-Id: 12121511 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-14.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY, UNWANTED_LANGUAGE_BODY,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1B16AC433E0 for ; Mon, 8 Mar 2021 06:08:20 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 8A08665139 for ; Mon, 8 Mar 2021 06:08:19 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8A08665139 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:CC:To:From: Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender :Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=GdmFSRQvF0UFyhlAMZYR3x4hfOWLdrVPx/JIAFtpccM=; b=reumVNZu4rqD7OF0G7fqo8Q9QL QTPydrdxEt2s5LqnysKGaS1u0GQPKBfHiaTikGwQPv2zZ1BI6V9phMV7Su6CLt9ZemfNTONNxRsMh IUWcV3vwQnpG+0ZyQkFjoSjy0UiB7avL8ZFVRIbU3BIf42SVVKRDGhBholWFVB+VtB6xUlkvVPGIY oecBjn412Bg064EM/ZFoBeEMNn4/hieZxbSjbf5tM3NBZBidlkoQMBWBAVXg/Mu5/rIv3j1gRS4ER vzZrNMyrqlmj4H7hJggbT/6moK8PQNKeJWtlr42YWa1d7qi2zAidVxUrIOcPpfmuVNIUP7UD4RFZI 5wqkXdQQ==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lJ920-00FPiC-JV; Mon, 08 Mar 2021 06:06:16 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lJ91h-00FPbr-4m; Mon, 08 Mar 2021 06:06:04 +0000 X-UUID: 91f40729d6064f6eb107f9f42db975f9-20210307 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Transfer-Encoding:Content-Type:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=NshLRlFPPFyRJlJSwhAFYQ/LjwGkPLgFTaF0zNhyl78=; b=rNHiURTN1kIlXgyQutWb0lHvGNCowuvXkdw7y/29m6cXX81c2UGR2QU787p0LK4QESq2i1ftKBOFzxjoPrGRTo5Epc2ZTfLJWLivwnzUZPdUc2GMDRlfoqFp6TZJtgUU6beSXtjOP9VJJf7k7xwdv8plXi94WLnQqP5IvD9M69w=; X-UUID: 91f40729d6064f6eb107f9f42db975f9-20210307 Received: from mtkcas67.mediatek.inc [(172.29.193.45)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1578522733; Sun, 07 Mar 2021 22:05:49 -0800 Received: from mtkmbs08n1.mediatek.inc (172.21.101.55) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Sun, 7 Mar 2021 22:05:48 -0800 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs08n1.mediatek.inc (172.21.101.55) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 8 Mar 2021 14:05:40 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Mon, 8 Mar 2021 14:05:40 +0800 From: Mark-PK Tsai To: Marc Zyngier CC: , Mark-PK Tsai , "Daniel Palmer" , Thomas Gleixner , "Matthias Brugger" , , , Subject: [PATCH v2] irqchip/irq-mst: Support polarity configuration Date: Mon, 8 Mar 2021 14:05:38 +0800 Message-ID: <20210308060538.11164-1-mark-pk.tsai@mediatek.com> X-Mailer: git-send-email 2.18.0 MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210308_060558_194562_209190F6 X-CRM114-Status: GOOD ( 17.77 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Support irq polarity configuration and save and restore the config when system suspend and resume. Signed-off-by: Mark-PK Tsai --- drivers/irqchip/irq-mst-intc.c | 90 ++++++++++++++++++++++++++++++++-- 1 file changed, 87 insertions(+), 3 deletions(-) diff --git a/drivers/irqchip/irq-mst-intc.c b/drivers/irqchip/irq-mst-intc.c index 143657b0cf28..841b9b1c2699 100644 --- a/drivers/irqchip/irq-mst-intc.c +++ b/drivers/irqchip/irq-mst-intc.c @@ -13,15 +13,25 @@ #include #include #include +#include -#define INTC_MASK 0x0 -#define INTC_EOI 0x20 +#define INTC_MASK 0x0 +#define INTC_REV_POLARITY 0x10 +#define INTC_EOI 0x20 + +#ifdef CONFIG_PM_SLEEP +static LIST_HEAD(mst_intc_list); +#endif struct mst_intc_chip_data { raw_spinlock_t lock; unsigned int irq_start, nr_irqs; void __iomem *base; bool no_eoi; +#ifdef CONFIG_PM_SLEEP + struct list_head entry; + u16 saved_polarity_conf[DIV_ROUND_UP(64, 16)]; +#endif }; static void mst_set_irq(struct irq_data *d, u32 offset) @@ -78,6 +88,19 @@ static void mst_intc_eoi_irq(struct irq_data *d) irq_chip_eoi_parent(d); } +static int mst_irq_chip_set_type(struct irq_data *data, unsigned int type) +{ + if (type != IRQ_TYPE_LEVEL_LOW && type != IRQ_TYPE_LEVEL_HIGH) + return -EINVAL; + + if (type == IRQ_TYPE_LEVEL_LOW) { + mst_set_irq(data, INTC_REV_POLARITY); + type = IRQ_TYPE_LEVEL_HIGH; + } + + return irq_chip_set_type_parent(data, type); +} + static struct irq_chip mst_intc_chip = { .name = "mst-intc", .irq_mask = mst_intc_mask_irq, @@ -87,13 +110,62 @@ static struct irq_chip mst_intc_chip = { .irq_set_irqchip_state = irq_chip_set_parent_state, .irq_set_affinity = irq_chip_set_affinity_parent, .irq_set_vcpu_affinity = irq_chip_set_vcpu_affinity_parent, - .irq_set_type = irq_chip_set_type_parent, + .irq_set_type = mst_irq_chip_set_type, .irq_retrigger = irq_chip_retrigger_hierarchy, .flags = IRQCHIP_SET_TYPE_MASKED | IRQCHIP_SKIP_SET_WAKE | IRQCHIP_MASK_ON_SUSPEND, }; +#ifdef CONFIG_PM_SLEEP +static void mst_intc_polarity_save(struct mst_intc_chip_data *cd) +{ + int i; + void __iomem *addr = cd->base + INTC_REV_POLARITY; + + for (i = 0; i < DIV_ROUND_UP(cd->nr_irqs, 16); i++) + cd->saved_polarity_conf[i] = readw_relaxed(addr + i * 4); +} + +static void mst_intc_polarity_restore(struct mst_intc_chip_data *cd) +{ + int i; + void __iomem *addr = cd->base + INTC_REV_POLARITY; + + for (i = 0; i < DIV_ROUND_UP(cd->nr_irqs, 16); i++) + writew_relaxed(cd->saved_polarity_conf[i], addr + i * 4); +} + +static void mst_irq_resume(void) +{ + struct mst_intc_chip_data *cd; + + list_for_each_entry(cd, &mst_intc_list, entry) + mst_intc_polarity_restore(cd); +} + +static int mst_irq_suspend(void) +{ + struct mst_intc_chip_data *cd; + + list_for_each_entry(cd, &mst_intc_list, entry) + mst_intc_polarity_save(cd); + return 0; +} + +static struct syscore_ops mst_irq_syscore_ops = { + .suspend = mst_irq_suspend, + .resume = mst_irq_resume, +}; + +static int __init mst_irq_pm_init(void) +{ + register_syscore_ops(&mst_irq_syscore_ops); + return 0; +} +late_initcall(mst_irq_pm_init); +#endif + static int mst_intc_domain_translate(struct irq_domain *d, struct irq_fwspec *fwspec, unsigned long *hwirq, @@ -145,6 +217,14 @@ static int mst_intc_domain_alloc(struct irq_domain *domain, unsigned int virq, parent_fwspec = *fwspec; parent_fwspec.fwnode = domain->parent->fwnode; parent_fwspec.param[1] = cd->irq_start + hwirq; + + /* + * If the irq signal is active low, configure it to active high + * to meet GIC SPI spec in mst_irq_chip_set_type via REV_POLARITY bit + */ + if (fwspec->param[2] == IRQ_TYPE_LEVEL_LOW) + parent_fwspec.param[2] = IRQ_TYPE_LEVEL_HIGH; + return irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, &parent_fwspec); } @@ -193,6 +273,10 @@ static int __init mst_intc_of_init(struct device_node *dn, return -ENOMEM; } +#ifdef CONFIG_PM_SLEEP + INIT_LIST_HEAD(&cd->entry); + list_add_tail(&cd->entry, &mst_intc_list); +#endif return 0; }