From patchwork Thu May 16 15:55:19 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Petazzoni X-Patchwork-Id: 2578891 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: patchwork-linux-pci@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork1.kernel.org (Postfix) with ESMTP id 2D90340D27 for ; Thu, 16 May 2013 15:58:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754766Ab3EPP54 (ORCPT ); Thu, 16 May 2013 11:57:56 -0400 Received: from mail.free-electrons.com ([94.23.35.102]:60179 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754748Ab3EPP5w (ORCPT ); Thu, 16 May 2013 11:57:52 -0400 Received: by mail.free-electrons.com (Postfix, from userid 106) id B12151027; Thu, 16 May 2013 17:57:51 +0200 (CEST) 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 (col31-4-88-188-83-94.fbx.proxad.net [88.188.83.94]) by mail.free-electrons.com (Postfix) with ESMTPSA id 2076D789; Thu, 16 May 2013 17:55:32 +0200 (CEST) From: Thomas Petazzoni To: Jason Cooper , Andrew Lunn , Gregory Clement Cc: linux-arm-kernel@lists.infradead.org, Arnd Bergmann , Olof Johansson , Bjorn Helgaas , Grant Likely , Lior Amsalem , Maen Suleiman , Tawfik Bayouk , Jason Gunthorpe , linux-pci@vger.kernel.org, Thierry Reding , Rob Herring , Ezequiel Garcia , devicetree-discuss@lists.ozlabs.org Subject: [PATCHv10 4/9] of/pci: Add of_pci_parse_bus_range() function Date: Thu, 16 May 2013 17:55:19 +0200 Message-Id: <1368719725-21265-5-git-send-email-thomas.petazzoni@free-electrons.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1368719725-21265-1-git-send-email-thomas.petazzoni@free-electrons.com> References: <1368719725-21265-1-git-send-email-thomas.petazzoni@free-electrons.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.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