Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761853Ab3DCOqH (ORCPT ); Wed, 3 Apr 2013 10:46:07 -0400 Received: from moutng.kundenserver.de ([212.227.17.8]:63043 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758844Ab3DCOpy (ORCPT ); Wed, 3 Apr 2013 10:45:54 -0400 From: Thierry Reding To: Grant Likely , Rob Herring , Stephen Warren , Bjorn Helgaas Cc: Russell King , Andrew Murray , Jason Gunthorpe , Arnd Bergmann , Thomas Petazzoni , devicetree-discuss@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-tegra@vger.kernel.org, linux-pci@vger.kernel.org Subject: [PATCH v3 03/12] of/pci: Add of_pci_parse_bus_range() function Date: Wed, 3 Apr 2013 16:45:09 +0200 Message-Id: <1365000318-28256-4-git-send-email-thierry.reding@avionic-design.de> X-Mailer: git-send-email 1.8.2 In-Reply-To: <1365000318-28256-1-git-send-email-thierry.reding@avionic-design.de> References: <1365000318-28256-1-git-send-email-thierry.reding@avionic-design.de> X-Provags-ID: V02:K0:NMZjLb00773EoV79SNxpiFMIOXAvCykZPtwfpvzIML3 +hOxiIUWNtPoUpJbaRJ2JLLelbrDps0OCmcZ8J+zzCuhsGeAcc qEHjokUWxRA0lSZdt0U0i0+gVpXGFIVfywBM32052SmaxxM/aj P6rYfr6T63L3oBvzvMsFz23kl/YmSmsG1PNS49Ghi80QK6lHA2 L84hZhAo5UUHxHULietVsoxmARijBDigg4+BtobNfRQDkIVPNK cvABcRXAybk3iekg/eAIy/MIMHmyNrkg2Jq0NYk44HW8+5q/Rs 3hc1U7oA/JDXpoIx+hJTYawze9jwkyZxMhaWx9ULoIvPCNfwkp 1mu0FB/f4jS7e6BK+bDG87ovR+pSRm30/QJ05hMfLOBgWIAS4I HmBlxDGWhkyDTWSCWM+y+yvZ7f3RKmBAmnnJBT8sixy3oLRZ/s TeajF Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1936 Lines: 61 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 -- 1.8.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/