From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753844Ab3BKIWa (ORCPT ); Mon, 11 Feb 2013 03:22:30 -0500 Received: from moutng.kundenserver.de ([212.227.17.10]:55722 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753095Ab3BKIW2 (ORCPT ); Mon, 11 Feb 2013 03:22:28 -0500 From: Thierry Reding To: Grant Likely Cc: Rob Herring , Andrew Murray , Thomas Petazzoni , devicetree-discuss@lists.ozlabs.org, linux-kernel@vger.kernel.org Subject: [PATCH 4/4] of/pci: Add of_pci_parse_bus_range() function Date: Mon, 11 Feb 2013 09:22:20 +0100 Message-Id: <1360570940-17086-5-git-send-email-thierry.reding@avionic-design.de> X-Mailer: git-send-email 1.8.1.2 In-Reply-To: <1360570940-17086-1-git-send-email-thierry.reding@avionic-design.de> References: <1360570940-17086-1-git-send-email-thierry.reding@avionic-design.de> X-Provags-ID: V02:K0:Ed9neIwyaO/wtSBN7UeP0d5W8cvz1MsHviRGlZn7u3C EIP7lKqXATTBIcXomur05s67jIdt4+Ac1co5CxuJ5v5AGTzmX4 Cre2ZyweAlzq5qb96HwOAH9o6sdTSPLOHz6ynVjeIBsqPwlgJz ldWv0hYodVvS3pw7vKiQrzxE/Su1nOkegEfBzs7l048MPmuELy DzP0P2Xslv0WJvfyoaMs7Ay9QMaQgoVucSzUlpvM1u3Q2Hf88a bQMkAr15nQmuVOoQMeM5d4zXx+NGularoBT/mpj8wabqezm/ue Nai0DIjbTassfW7424POQTCGBQRf6TapRH2gD6o+saheGmvyLZ XzbkKhD1Ee7xl2aQFTHRPQHAanWvg2wt1K5LVV/+oI79Xen4E9 ZkWSOD3grRJayfJxTFcl1mrDsMC9O+83aozzGKxVkmby50Ce0t 4xSUI Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 d6e6de5..fb92ded 100644 --- a/drivers/of/of_pci.c +++ b/drivers/of/of_pci.c @@ -85,3 +85,28 @@ 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 9118321..fb6e95e 100644 --- a/include/linux/of_pci.h +++ b/include/linux/of_pci.h @@ -12,5 +12,6 @@ struct device_node *of_pci_find_child_device(struct device_node *parent, unsigned int devfn); int of_pci_get_bus(struct device_node *np); int of_pci_get_devfn(struct device_node *np); +int of_pci_parse_bus_range(struct device_node *node, struct resource *res); #endif -- 1.8.1.2