From patchwork Thu Mar 21 17:30:11 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Petazzoni X-Patchwork-Id: 2315961 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork1.kernel.org (Postfix) with ESMTP id 5070C40213 for ; Thu, 21 Mar 2013 17:35:39 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1UIjLP-0004WJ-GL; Thu, 21 Mar 2013 17:32:03 +0000 Received: from mail.free-electrons.com ([94.23.35.102]) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1UIjK2-00048U-Ks for linux-arm-kernel@lists.infradead.org; Thu, 21 Mar 2013 17:30:42 +0000 Received: by mail.free-electrons.com (Postfix, from userid 106) id 207C411A7; Thu, 21 Mar 2013 18:30:37 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on mail.free-electrons.com X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=ALL_TRUSTED,SHORTCIRCUIT, URIBL_BLOCKED shortcircuit=ham autolearn=disabled version=3.3.2 Received: from localhost (unknown [88.188.83.94]) by mail.free-electrons.com (Postfix) with ESMTPSA id 63A707D2; Thu, 21 Mar 2013 18:30:37 +0100 (CET) From: Thomas Petazzoni To: Bjorn Helgaas , Grant Likely , Russell King Subject: [PATCH v5 03/17] of/pci: Add of_pci_parse_bus_range() function Date: Thu, 21 Mar 2013 18:30:11 +0100 Message-Id: <1363887025-19931-4-git-send-email-thomas.petazzoni@free-electrons.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1363887025-19931-1-git-send-email-thomas.petazzoni@free-electrons.com> References: <1363887025-19931-1-git-send-email-thomas.petazzoni@free-electrons.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130321_133038_846748_C534AFBD X-CRM114-Status: GOOD ( 12.10 ) X-Spam-Score: -4.4 (----) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-4.4 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 SPF_PASS SPF: sender matches SPF record -2.5 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: Lior Amsalem , Andrew Lunn , Jason Cooper , Arnd Bergmann , Olof Johansson , linux-pci@vger.kernel.org, devicetree-discuss@lists.ozlabs.org, Thierry Reding , Jason Gunthorpe , Maen Suleiman , Ezequiel Garcia , Gregory Clement , Andrew Murray , Tawfik Bayouk , linux-arm-kernel@lists.infradead.org, Mitch Bradley X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org From: Thierry Reding This function can be used to parse a bus-range property as specified by device nodes representing PCI bridges. Signed-off-by: Thierry Reding --- drivers/of/of_pci.c | 25 +++++++++++++++++++++++++ include/linux/of_pci.h | 1 + 2 files changed, 26 insertions(+) diff --git a/drivers/of/of_pci.c b/drivers/of/of_pci.c index 4dd7b9b..42c687a 100644 --- a/drivers/of/of_pci.c +++ b/drivers/of/of_pci.c @@ -64,3 +64,28 @@ int of_pci_get_devfn(struct device_node *np) return (be32_to_cpup(reg) >> 8) & 0xff; } EXPORT_SYMBOL_GPL(of_pci_get_devfn); + +/** + * of_pci_parse_bus_range() - parse the bus-range property of a PCI device + * @node: device node + * @res: address to a struct resource to return the bus-range + * + * Returns 0 on success or a negative error-code on failure. + */ +int of_pci_parse_bus_range(struct device_node *node, struct resource *res) +{ + const __be32 *values; + int len; + + values = of_get_property(node, "bus-range", &len); + if (!values || len < sizeof(*values) * 2) + return -EINVAL; + + res->name = node->name; + res->start = be32_to_cpup(values++); + res->end = be32_to_cpup(values); + res->flags = IORESOURCE_BUS; + + return 0; +} +EXPORT_SYMBOL_GPL(of_pci_parse_bus_range); diff --git a/include/linux/of_pci.h b/include/linux/of_pci.h index 91ec484..7a04826 100644 --- a/include/linux/of_pci.h +++ b/include/linux/of_pci.h @@ -11,5 +11,6 @@ struct device_node; struct device_node *of_pci_find_child_device(struct device_node *parent, unsigned int devfn); int of_pci_get_devfn(struct device_node *np); +int of_pci_parse_bus_range(struct device_node *node, struct resource *res); #endif