Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935020AbbEPJqo (ORCPT ); Sat, 16 May 2015 05:46:44 -0400 Received: from mail.kmu-office.ch ([178.209.48.109]:46547 "EHLO mail.kmu-office.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754890AbbEPJob (ORCPT ); Sat, 16 May 2015 05:44:31 -0400 From: Stefan Agner To: shawn.guo@linaro.org, kernel@pengutronix.de, jason@lakedaemon.net Cc: marc.zyngier@arm.com, linux@arm.linux.org.uk, u.kleine-koenig@pengutronix.de, olof@lixom.net, arnd@arndb.de, daniel.lezcano@linaro.org, tglx@linutronix.de, mark.rutland@arm.com, pawel.moll@arm.com, robh+dt@kernel.org, ijc+devicetree@hellion.org.uk, galak@codeaurora.org, mcoquelin.stm32@gmail.com, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Stefan Agner Subject: [PATCH v7 04/13] irqchip: nvic: support hierarchy irq domain Date: Sat, 16 May 2015 11:44:16 +0200 Message-Id: <1431769465-26867-5-git-send-email-stefan@agner.ch> X-Mailer: git-send-email 2.4.1 In-Reply-To: <1431769465-26867-1-git-send-email-stefan@agner.ch> References: <1431769465-26867-1-git-send-email-stefan@agner.ch> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2289 Lines: 76 Add support for hierarchy irq domains. This is required to stack the MSCM interrupt router and the NVIC controller found in Vybrid SoC. Signed-off-by: Stefan Agner --- drivers/irqchip/Kconfig | 1 + drivers/irqchip/irq-nvic.c | 28 +++++++++++++++++++++++++++- 2 files changed, 28 insertions(+), 1 deletion(-) diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig index 6de62a9..99b9a97 100644 --- a/drivers/irqchip/Kconfig +++ b/drivers/irqchip/Kconfig @@ -30,6 +30,7 @@ config ARM_GIC_V3_ITS config ARM_NVIC bool select IRQ_DOMAIN + select IRQ_DOMAIN_HIERARCHY select GENERIC_IRQ_CHIP config ARM_VIC diff --git a/drivers/irqchip/irq-nvic.c b/drivers/irqchip/irq-nvic.c index 4ff0805..5fac910 100644 --- a/drivers/irqchip/irq-nvic.c +++ b/drivers/irqchip/irq-nvic.c @@ -49,6 +49,31 @@ nvic_handle_irq(irq_hw_number_t hwirq, struct pt_regs *regs) handle_IRQ(irq, regs); } +static int nvic_irq_domain_alloc(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs, void *arg) +{ + int i, ret; + irq_hw_number_t hwirq; + unsigned int type = IRQ_TYPE_NONE; + struct of_phandle_args *irq_data = arg; + + ret = irq_domain_xlate_onecell(domain, irq_data->np, irq_data->args, + irq_data->args_count, &hwirq, &type); + if (ret) + return ret; + + for (i = 0; i < nr_irqs; i++) + irq_map_generic_chip(domain, virq + i, hwirq + i); + + return 0; +} + +static const struct irq_domain_ops nvic_irq_domain_ops = { + .xlate = irq_domain_xlate_onecell, + .alloc = nvic_irq_domain_alloc, + .free = irq_domain_free_irqs_top, +}; + static int __init nvic_of_init(struct device_node *node, struct device_node *parent) { @@ -70,7 +95,8 @@ static int __init nvic_of_init(struct device_node *node, irqs = NVIC_MAX_IRQ; nvic_irq_domain = - irq_domain_add_linear(node, irqs, &irq_generic_chip_ops, NULL); + irq_domain_add_linear(node, irqs, &nvic_irq_domain_ops, NULL); + if (!nvic_irq_domain) { pr_warn("Failed to allocate irq domain\n"); return -ENOMEM; -- 2.4.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/