Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755328AbbGUKIV (ORCPT ); Tue, 21 Jul 2015 06:08:21 -0400 Received: from foss.arm.com ([217.140.101.70]:59039 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753373AbbGUKIS (ORCPT ); Tue, 21 Jul 2015 06:08:18 -0400 From: Marc Zyngier To: Thomas Gleixner , Jiang Liu , Jason Cooper Cc: , , , Lorenzo Pieralisi , Tomasz Nowicki , Hanjun Guo , "Rafael J. Wysocki" , Suravee Suthikulpanit Subject: [PATCH 4/5] acpi: gsi: Use acpi_gsi_descriptor to allocate interrupts Date: Tue, 21 Jul 2015 11:07:59 +0100 Message-Id: <1437473280-11431-5-git-send-email-marc.zyngier@arm.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1437473280-11431-1-git-send-email-marc.zyngier@arm.com> References: <1437473280-11431-1-git-send-email-marc.zyngier@arm.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3419 Lines: 110 Now that the irqdomain layer is a bit more ACPI friendly, add the mapping code that allows irq_create_acpi_mapping to be called. As we only support the GIC so far, support is pretty limited. Signed-off-by: Marc Zyngier --- drivers/acpi/gsi.c | 54 ++++++++++++++++++++++++++++++++++++------------------ 1 file changed, 36 insertions(+), 18 deletions(-) diff --git a/drivers/acpi/gsi.c b/drivers/acpi/gsi.c index 38208f2..005d843 100644 --- a/drivers/acpi/gsi.c +++ b/drivers/acpi/gsi.c @@ -33,6 +33,12 @@ static unsigned int acpi_gsi_get_irq_type(int trigger, int polarity) } } +static struct irq_domain *irq_find_acpi_domain(enum acpi_irq_model_id id, + enum irq_domain_bus_token bus_token) +{ + return irq_find_matching_host((void *)id, bus_token); +} + /** * acpi_gsi_to_irq() - Retrieve the linux irq number for a given GSI * @gsi: GSI IRQ number to map @@ -45,12 +51,10 @@ static unsigned int acpi_gsi_get_irq_type(int trigger, int polarity) */ int acpi_gsi_to_irq(u32 gsi, unsigned int *irq) { - /* - * Only default domain is supported at present, always find - * the mapping corresponding to default domain by passing NULL - * as irq_domain parameter - */ - *irq = irq_find_mapping(NULL, gsi); + struct irq_domain *d = irq_find_acpi_domain(acpi_irq_model, + DOMAIN_BUS_ANY); + + *irq = irq_find_mapping(d, gsi); /* * *irq == 0 means no mapping, that should * be reported as a failure @@ -72,23 +76,35 @@ EXPORT_SYMBOL_GPL(acpi_gsi_to_irq); int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity) { - unsigned int irq; + struct acpi_gsi_descriptor data; unsigned int irq_type = acpi_gsi_get_irq_type(trigger, polarity); + struct irq_domain *d = irq_find_acpi_domain(acpi_irq_model, + DOMAIN_BUS_ANY); /* - * There is no way at present to look-up the IRQ domain on ACPI, - * hence always create mapping referring to the default domain - * by passing NULL as irq_domain parameter + * Populate the GSI descriptor in a way that matches the way + * the driver expects its of_phandle_args. */ - irq = irq_create_mapping(NULL, gsi); - if (!irq) + switch (acpi_irq_model) { + case ACPI_IRQ_MODEL_GIC: + if (gsi >= 32) { + data.param[0] = 0; + data.param[1] = gsi - 32; + data.param[2] = irq_type; + } else { + data.param[0] = 1; + data.param[1] = gsi - 16; + data.param[2] = 0xff << 4 | irq_type; + } + + data.param_count = 3; + break; + default: + pr_warn("Unknown acpi_irq_model = %d\n", acpi_irq_model); return -EINVAL; + } - /* Set irq type if specified and different than the current one */ - if (irq_type != IRQ_TYPE_NONE && - irq_type != irq_get_trigger_type(irq)) - irq_set_irq_type(irq, irq_type); - return irq; + return irq_create_acpi_mapping(d, &data); } EXPORT_SYMBOL_GPL(acpi_register_gsi); @@ -98,7 +114,9 @@ EXPORT_SYMBOL_GPL(acpi_register_gsi); */ void acpi_unregister_gsi(u32 gsi) { - int irq = irq_find_mapping(NULL, gsi); + struct irq_domain *d = irq_find_acpi_domain(acpi_irq_model, + DOMAIN_BUS_ANY); + int irq = irq_find_mapping(d, gsi); irq_dispose_mapping(irq); } -- 2.1.4 -- 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/