mirror of https://github.com/hak5/openwrt-owl.git
56 lines
1.7 KiB
Diff
56 lines
1.7 KiB
Diff
From 389637f9e7f523934acf26c247e4722d761ad966 Mon Sep 17 00:00:00 2001
|
|
From: Thierry Reding <thierry.reding@avionic-design.de>
|
|
Date: Thu, 16 May 2013 17:55:19 +0200
|
|
Subject: [PATCH 03/29] of/pci: Add of_pci_parse_bus_range() function
|
|
|
|
This function can be used to parse a bus-range property as specified by
|
|
device nodes representing PCI bridges.
|
|
|
|
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
|
|
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
|
|
---
|
|
drivers/of/of_pci.c | 25 +++++++++++++++++++++++++
|
|
include/linux/of_pci.h | 1 +
|
|
2 files changed, 26 insertions(+)
|
|
|
|
--- a/drivers/of/of_pci.c
|
|
+++ b/drivers/of/of_pci.c
|
|
@@ -64,3 +64,28 @@ int of_pci_get_devfn(struct device_node
|
|
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);
|
|
--- 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
|