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

   1 From 6275a8e0bacac9702350b6a003470a9ce67c9139 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 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 ---
  11  drivers/of/of_pci.c    | 25 +++++++++++++++++++++++++
  12  include/linux/of_pci.h |  1 +
  13  2 files changed, 26 insertions(+)
  14
  15 diff --git a/drivers/of/of_pci.c b/drivers/of/of_pci.c
  16 index 4dd7b9b..42c687a 100644
  17 --- a/drivers/of/of_pci.c
  18 +++ b/drivers/of/of_pci.c
  19 @@ -64,3 +64,28 @@ int of_pci_get_devfn(struct device_node *np)
  20         return (be32_to_cpup(reg) >> 8) & 0xff;
  21  }
  22  EXPORT_SYMBOL_GPL(of_pci_get_devfn);
  23 +
  24 +/**
  25 + * of_pci_parse_bus_range() - parse the bus-range property of a PCI device
  26 + * @node: device node
  27 + * @res: address to a struct resource to return the bus-range
  28 + *
  29 + * Returns 0 on success or a negative error-code on failure.
  30 + */
  31 +int of_pci_parse_bus_range(struct device_node *node, struct resource *res)
  32 +{
  33 +       const __be32 *values;
  34 +       int len;
  35 +
  36 +       values = of_get_property(node, "bus-range", &len);
  37 +       if (!values || len < sizeof(*values) * 2)
  38 +               return -EINVAL;
  39 +
  40 +       res->name = node->name;
  41 +       res->start = be32_to_cpup(values++);
  42 +       res->end = be32_to_cpup(values);
  43 +       res->flags = IORESOURCE_BUS;
  44 +
  45 +       return 0;
  46 +}
  47 +EXPORT_SYMBOL_GPL(of_pci_parse_bus_range);
  48 diff --git a/include/linux/of_pci.h b/include/linux/of_pci.h
  49 index 91ec484..7a04826 100644
  50 --- a/include/linux/of_pci.h
  51 +++ b/include/linux/of_pci.h
  52 @@ -11,5 +11,6 @@ struct device_node;
  53  struct device_node *of_pci_find_child_device(struct device_node *parent,
  54                                              unsigned int devfn);
  55  int of_pci_get_devfn(struct device_node *np);
  56 +int of_pci_parse_bus_range(struct device_node *node, struct resource *res);
  57
  58  #endif
  59 --
  60 1.8.4.rc1
  61