From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965123AbaCUOuj (ORCPT ); Fri, 21 Mar 2014 10:50:39 -0400 Received: from mail-wg0-f45.google.com ([74.125.82.45]:64626 "EHLO mail-wg0-f45.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757638AbaCUOt5 (ORCPT ); Fri, 21 Mar 2014 10:49:57 -0400 From: Jean-Jacques Hiblot To: grant.likely@secretlab.ca Cc: devicetree@vger.kernel.org, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, robh+dt@kernel.org, gregory.clement@free-electrons.com, linux-arm-kernel@lists.infradead.org, Jean-Jacques Hiblot Subject: [PATCH v3 1/2] of: irq: Added of_find_irq_domain() to get the domain of an irq Date: Fri, 21 Mar 2014 15:46:24 +0100 Message-Id: <1395413185-29763-2-git-send-email-jjhiblot@traphandler.com> X-Mailer: git-send-email 1.9.0 In-Reply-To: <1395413185-29763-1-git-send-email-jjhiblot@traphandler.com> References: <20140320161118.B7075C4067A@trevor.secretlab.ca> <1395413185-29763-1-git-send-email-jjhiblot@traphandler.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This functions does the same parsing as irq_of_parse_and_map but instead of doing the mapping, it returns a pointer to the irq domain Signed-off-by: Jean-Jacques Hiblot --- drivers/of/irq.c | 20 ++++++++++++++++++++ include/linux/of_irq.h | 2 ++ 2 files changed, 22 insertions(+) diff --git a/drivers/of/irq.c b/drivers/of/irq.c index 9bcf2cf..7d3184f 100644 --- a/drivers/of/irq.c +++ b/drivers/of/irq.c @@ -46,6 +46,26 @@ unsigned int irq_of_parse_and_map(struct device_node *dev, int index) EXPORT_SYMBOL_GPL(irq_of_parse_and_map); /** + * of_find_irq_domain - Parse the DT and returns a pointer to the irq domain + * @dev: Device node of the device whose interrupt is concerned + * @index: Index of the interrupt to get the domain for + * + * This function is a wrapper that chains of_irq_parse_one() and + * irq_find_host() to make things easier to callers + */ +struct irq_domain *of_find_irq_domain(struct device_node *dev, int index) +{ + int rc; + struct of_phandle_args oirq; + + rc = of_irq_parse_one(dev, index, &oirq); + if (rc) + return ERR_PTR(rc); + + return irq_find_host(oirq.np); +} + +/** * of_irq_find_parent - Given a device node, find its interrupt parent node * @child: pointer to device node * diff --git a/include/linux/of_irq.h b/include/linux/of_irq.h index 3f23b44..600ff0a 100644 --- a/include/linux/of_irq.h +++ b/include/linux/of_irq.h @@ -58,6 +58,8 @@ static inline int of_irq_count(struct device_node *dev) * so declare it here regardless of the CONFIG_OF_IRQ setting. */ extern unsigned int irq_of_parse_and_map(struct device_node *node, int index); +extern struct irq_domain *of_find_irq_domain(struct device_node *dev, + int index); extern struct device_node *of_irq_find_parent(struct device_node *child); #else /* !CONFIG_OF */ -- 1.9.0