From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jingoo Han Subject: [PATCH 2/6] of/pci: Add of_pci_parse_bus_range() function Date: Sat, 23 Mar 2013 13:05:56 +0900 Message-ID: <00c101ce277b$b8835b00$298a1100$%han@samsung.com> References: <00c001ce277b$92b26ab0$b8174010$%han@samsung.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-reply-to: <00c001ce277b$92b26ab0$b8174010$%han-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org> Content-language: ko List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: devicetree-discuss-bounces+gldd-devicetree-discuss=m.gmane.org-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org Sender: "devicetree-discuss" To: 'Kukjin Kim' , 'Bjorn Helgaas' Cc: 'Jason Gunthorpe' , linux-samsung-soc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, 'Siva Reddy Kallam' , linux-pci-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, 'Surendranath Gurivireddy Balla' , 'Jingoo Han' , 'Andrew Murray' , linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org List-Id: devicetree@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 Signed-off-by: Jingoo Han --- drivers/of/of_pci.c | 25 +++++++++++++++++++++++++ include/linux/of_pci.h | 1 + 2 files changed, 26 insertions(+), 0 deletions(-) diff --git a/drivers/of/of_pci.c b/drivers/of/of_pci.c index 13e37e2..4ca7837 100644 --- a/drivers/of/of_pci.c +++ b/drivers/of/of_pci.c @@ -40,3 +40,28 @@ struct device_node *of_pci_find_child_device(struct device_node *parent, return NULL; } EXPORT_SYMBOL_GPL(of_pci_find_child_device); + +/** + * 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 bb115de..178a5cc 100644 --- a/include/linux/of_pci.h +++ b/include/linux/of_pci.h @@ -10,5 +10,6 @@ int of_irq_map_pci(const struct pci_dev *pdev, struct of_irq *out_irq); struct device_node; struct device_node *of_pci_find_child_device(struct device_node *parent, unsigned int devfn); +int of_pci_parse_bus_range(struct device_node *node, struct resource *res); #endif -- 1.7.2.5