From patchwork Thu Sep 5 14:43:06 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiaxun Yang X-Patchwork-Id: 11133255 X-Patchwork-Delegate: paulburton@kernel.org Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8474E13B1 for ; Thu, 5 Sep 2019 14:46:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A84A220820 for ; Thu, 5 Sep 2019 14:46:06 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=flygoat.com header.i=@flygoat.com header.b="JyKKDs9U" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389368AbfIEOqG (ORCPT ); Thu, 5 Sep 2019 10:46:06 -0400 Received: from forward100j.mail.yandex.net ([5.45.198.240]:44622 "EHLO forward100j.mail.yandex.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389424AbfIEOqF (ORCPT ); Thu, 5 Sep 2019 10:46:05 -0400 Received: from mxback20o.mail.yandex.net (mxback20o.mail.yandex.net [IPv6:2a02:6b8:0:1a2d::71]) by forward100j.mail.yandex.net (Yandex) with ESMTP id 13D4C50E0D67; Thu, 5 Sep 2019 17:46:01 +0300 (MSK) Received: from smtp2o.mail.yandex.net (smtp2o.mail.yandex.net [2a02:6b8:0:1a2d::26]) by mxback20o.mail.yandex.net (nwsmtp/Yandex) with ESMTP id Ew6bU6hMB0-k0Z0frFu; Thu, 05 Sep 2019 17:46:01 +0300 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=flygoat.com; s=mail; t=1567694761; bh=GDPLbh2Za9If16kngBr0Vy91wenOeOyR+BDWVi+j/l8=; h=In-Reply-To:Subject:To:From:Cc:References:Date:Message-Id; b=JyKKDs9U5ZKs2JQfu4IkzVIq6AmaokuKzZhOc3wYlG5UlORdlcw3UpIAH6vPmbC8F 4MB69anqrCl9nRSGoU/3oLLjhaxHlLtAcErri0oVnsW2pqShkEBZ0ZAldNsJgfNyDz j99KtC/MZvFYGLSyDBzp7QuT7rTV95By1crzfntE= Authentication-Results: mxback20o.mail.yandex.net; dkim=pass header.i=@flygoat.com Received: by smtp2o.mail.yandex.net (nwsmtp/Yandex) with ESMTPSA id zkoybIaMjG-jlxW4ZjN; Thu, 05 Sep 2019 17:45:58 +0300 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (Client certificate not present) From: Jiaxun Yang To: linux-mips@vger.kernel.org Cc: chenhc@lemote.com, paul.burton@mips.com, tglx@linutronix.de, jason@lakedaemon.net, maz@kernel.org, linux-kernel@vger.kernel.org, robh+dt@kernel.org, mark.rutland@arm.co, devicetree@vger.kernel.org, Jiaxun Yang Subject: [PATCH v2 09/19] irqchip: i8259: Add plat-poll support Date: Thu, 5 Sep 2019 22:43:06 +0800 Message-Id: <20190905144316.12527-10-jiaxun.yang@flygoat.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190905144316.12527-1-jiaxun.yang@flygoat.com> References: <20190905144316.12527-1-jiaxun.yang@flygoat.com> MIME-Version: 1.0 Sender: linux-mips-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org For some platforms (e.g. Loongson-3), platfrom interrupt controller supports polling interrupt vector from i8259 automaticly and generating sepreated interrupt. Thus we add plat-poll OF property for these platforms and setup sepreated chained interrupt handler. Signed-off-by: Jiaxun Yang --- drivers/irqchip/irq-i8259.c | 47 ++++++++++++++++++++++++++++++++----- 1 file changed, 41 insertions(+), 6 deletions(-) diff --git a/drivers/irqchip/irq-i8259.c b/drivers/irqchip/irq-i8259.c index d000870d9b6b..e7a9895f3b2d 100644 --- a/drivers/irqchip/irq-i8259.c +++ b/drivers/irqchip/irq-i8259.c @@ -40,6 +40,12 @@ static void mask_and_ack_8259A(struct irq_data *d); static void init_8259A(int auto_eoi); static int (*i8259_poll)(void) = i8259_irq; +struct plat_poll_priv { + struct irq_domain *domain; + int hwirq; +}; +static struct plat_poll_priv plat_poll_priv[16]; + static struct irq_chip i8259A_chip = { .name = "XT-PIC", .irq_mask = disable_8259A_irq, @@ -346,22 +352,51 @@ static void i8259_irq_dispatch(struct irq_desc *desc) generic_handle_irq(irq); } +static void plat_poll_irq_dispatch(struct irq_desc *desc) +{ + struct plat_poll_priv *priv = irq_desc_get_handler_data(desc); + unsigned int irq; + + irq = irq_linear_revmap(priv->domain, priv->hwirq); + generic_handle_irq(irq); +} + int __init i8259_of_init(struct device_node *node, struct device_node *parent) { struct irq_domain *domain; - unsigned int parent_irq; domain = __init_i8259_irqs(node); - parent_irq = irq_of_parse_and_map(node, 0); - if (!parent_irq) { - pr_err("Failed to map i8259 parent IRQ\n"); - irq_domain_remove(domain); - return -ENODEV; + if (of_find_property(node, "plat-poll", NULL)) { + int i; + + for (i = 0; i < 16; i++) { + int parent_irq = irq_of_parse_and_map(node, i); + + if (!parent_irq) { + pr_err("Failed to map %d plat-poll i8259 parent IRQ\n", i); + irq_domain_remove(domain); + return -ENODEV; + } + plat_poll_priv[i].domain = domain; + plat_poll_priv[i].hwirq = i; + irq_set_chained_handler_and_data(parent_irq, + plat_poll_irq_dispatch, + &plat_poll_priv[i]); + } + } else { + unsigned int parent_irq; + + parent_irq = irq_of_parse_and_map(node, 0); + if (!parent_irq) { + pr_err("Failed to map i8259 parent IRQ\n"); + irq_domain_remove(domain); + return -ENODEV; } irq_set_chained_handler_and_data(parent_irq, i8259_irq_dispatch, domain); + } return 0; } IRQCHIP_DECLARE(i8259, "intel,i8259", i8259_of_init);