1 From 3f368ae1994efc17b59ffd34307c76b1f642527e Mon Sep 17 00:00:00 2001
2 From: Thierry Reding <thierry.reding@avionic-design.de>
3 Date: Mon, 11 Feb 2013 09:22:20 +0100
4 Subject: [PATCH 006/203] of/pci: Add of_pci_parse_bus_range() function
6 This function can be used to parse a bus-range property as specified by
7 device nodes representing PCI bridges.
9 Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
11 drivers/of/of_pci.c | 25 +++++++++++++++++++++++++
12 include/linux/of_pci.h | 1 +
13 2 files changed, 26 insertions(+)
15 --- a/drivers/of/of_pci.c
16 +++ b/drivers/of/of_pci.c
17 @@ -64,3 +64,28 @@ int of_pci_get_devfn(struct device_node
18 return (be32_to_cpup(reg) >> 8) & 0xff;
20 EXPORT_SYMBOL_GPL(of_pci_get_devfn);
23 + * of_pci_parse_bus_range() - parse the bus-range property of a PCI device
24 + * @node: device node
25 + * @res: address to a struct resource to return the bus-range
27 + * Returns 0 on success or a negative error-code on failure.
29 +int of_pci_parse_bus_range(struct device_node *node, struct resource *res)
31 + const __be32 *values;
34 + values = of_get_property(node, "bus-range", &len);
35 + if (!values || len < sizeof(*values) * 2)
38 + res->name = node->name;
39 + res->start = be32_to_cpup(values++);
40 + res->end = be32_to_cpup(values);
41 + res->flags = IORESOURCE_BUS;
45 +EXPORT_SYMBOL_GPL(of_pci_parse_bus_range);
46 --- a/include/linux/of_pci.h
47 +++ b/include/linux/of_pci.h
48 @@ -11,5 +11,6 @@ struct device_node;
49 struct device_node *of_pci_find_child_device(struct device_node *parent,
51 int of_pci_get_devfn(struct device_node *np);
52 +int of_pci_parse_bus_range(struct device_node *node, struct resource *res);