From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934471AbbI1Qpz (ORCPT ); Mon, 28 Sep 2015 12:45:55 -0400 Received: from foss.arm.com ([217.140.101.70]:51686 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934399AbbI1Qn1 (ORCPT ); Mon, 28 Sep 2015 12:43:27 -0400 From: Marc Zyngier To: Thomas Gleixner , Jiang Liu , Jason Cooper , "Rafael J. Wysocki" , Mark Rutland , Rob Herring , Frank Rowand Cc: , , , devicetree@vger.kernel.org, Lorenzo Pieralisi , Tomasz Nowicki , Hanjun Guo , Suravee Suthikulpanit , Graeme Gregory , Jake Oshins Subject: [PATCH v4 3/9] genirq/irqdomain: Add a fwnode_handle allocator Date: Mon, 28 Sep 2015 17:42:56 +0100 Message-Id: <1443458582-7497-4-git-send-email-marc.zyngier@arm.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1443458582-7497-1-git-send-email-marc.zyngier@arm.com> References: <1443458582-7497-1-git-send-email-marc.zyngier@arm.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In order to be able to reference an irqdomain from ACPI, we need to be able to create an identifier, which is a struct device_node. This device node does't really fit the ACPI infrastructure, so we cunningly hide it by returning the contained fwnode_handle. This will help a (still hypothetical) further migration of irqdomain from device_node to fwnode_handle. Signed-off-by: Marc Zyngier --- include/linux/irqdomain.h | 2 ++ kernel/irq/irqdomain.c | 30 ++++++++++++++++++++++++++++++ 2 files changed, 32 insertions(+) diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h index d3ca792..3193c61 100644 --- a/include/linux/irqdomain.h +++ b/include/linux/irqdomain.h @@ -162,6 +162,8 @@ enum { }; #ifdef CONFIG_IRQ_DOMAIN +struct fwnode_handle *irq_domain_alloc_fwnode(void *data); +void irq_domain_free_fwnode(struct fwnode_handle *fwnode); struct irq_domain *__irq_domain_add(struct device_node *of_node, int size, irq_hw_number_t hwirq_max, int direct_max, const struct irq_domain_ops *ops, diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c index e5c1e4c..5e7214a 100644 --- a/kernel/irq/irqdomain.c +++ b/kernel/irq/irqdomain.c @@ -29,6 +29,36 @@ static int irq_domain_alloc_descs(int virq, unsigned int nr_irqs, static void irq_domain_check_hierarchy(struct irq_domain *domain); /** + * irq_domain_alloc_fwnode - Allocate a OF-backed fwnode_handle suitable for + * identifying an irq domain + * @data: optional user-provided data + * + * Allocate a struct device_node, and return a poiner to the embedded + * fwnode_handle (or NULL on failure). + */ +struct fwnode_handle *irq_domain_alloc_fwnode(void *data) +{ + struct device_node *of_node; + + of_node = of_node_alloc("irqdomain@%p", data); + if (!of_node) + return NULL; + + of_node->data = data; + return &of_node->fwnode; +} + +/** + * irq_domain_free_fwnode - Free a OF-backed fwnode_handle + * + * Free a fwnode_handle allocated with irq_domain_alloc_fwnode. + */ +void irq_domain_free_fwnode(struct fwnode_handle *fwnode) +{ + of_node_put(to_of_node(fwnode)); +} + +/** * __irq_domain_add() - Allocate a new irq_domain data structure * @of_node: optional device-tree node of the interrupt controller * @size: Size of linear map; 0 for radix mapping only -- 2.1.4