target/linux/kirkwood/patches-3.10/0003-of-pci-Add-of_pci_parse_bus_range-function.patch

   1 From 389637f9e7f523934acf26c247e4722d761ad966 Mon Sep 17 00:00:00 2001
   2 From: Thierry Reding <thierry.reding@avionic-design.de>
   3 Date: Thu, 16 May 2013 17:55:19 +0200
   4 Subject: [PATCH 03/29] of/pci: Add of_pci_parse_bus_range() function
   5
   6 This function can be used to parse a bus-range property as specified by
   7 device nodes representing PCI bridges.
   8
   9 Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
  10 Signed-off-by: Jason Cooper <jason@lakedaemon.net>
  11 ---
  12  drivers/of/of_pci.c    | 25 +++++++++++++++++++++++++
  13  include/linux/of_pci.h |  1 +
  14  2 files changed, 26 insertions(+)
  15
  16 --- a/drivers/of/of_pci.c
  17 +++ b/drivers/of/of_pci.c
  18 @@ -64,3 +64,28 @@ int of_pci_get_devfn(struct device_node
  19         return (be32_to_cpup(reg) >> 8) & 0xff;
  20  }
  21  EXPORT_SYMBOL_GPL(of_pci_get_devfn);
  22 +
  23 +/**
  24 + * of_pci_parse_bus_range() - parse the bus-range property of a PCI device
  25 + * @node: device node
  26 + * @res: address to a struct resource to return the bus-range
  27 + *
  28 + * Returns 0 on success or a negative error-code on failure.
  29 + */
  30 +int of_pci_parse_bus_range(struct device_node *node, struct resource *res)
  31 +{
  32 +       const __be32 *values;
  33 +       int len;
  34 +
  35 +       values = of_get_property(node, "bus-range", &len);
  36 +       if (!values || len < sizeof(*values) * 2)
  37 +               return -EINVAL;
  38 +
  39 +       res->name = node->name;
  40 +       res->start = be32_to_cpup(values++);
  41 +       res->end = be32_to_cpup(values);
  42 +       res->flags = IORESOURCE_BUS;
  43 +
  44 +       return 0;
  45 +}
  46 +EXPORT_SYMBOL_GPL(of_pci_parse_bus_range);
  47 --- a/include/linux/of_pci.h
  48 +++ b/include/linux/of_pci.h
  49 @@ -11,5 +11,6 @@ struct device_node;
  50  struct device_node *of_pci_find_child_device(struct device_node *parent,
  51                                              unsigned int devfn);
  52  int of_pci_get_devfn(struct device_node *np);
  53 +int of_pci_parse_bus_range(struct device_node *node, struct resource *res);
  54
  55  #endif