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authorGrant Likely <grant.likely@secretlab.ca>2010-06-08 07:48:09 -0600
committerGrant Likely <grant.likely@secretlab.ca>2010-07-05 16:14:26 -0600
commit6b884a8d50a6eea2fb3dad7befe748f67193073b (patch)
tree85756fbd09ebaebdeb9a7ab56806bcbc5e793532 /drivers/of/address.c
parenta7c194b007ec40a130207e9ace9cecf598fc6ac5 (diff)
of/address: merge of_iomap()
Merge common code between Microblaze and PowerPC. This patch creates new of_address.h and address.c files to containing address translation and mapping routines. First routine to be moved it of_iomap() Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> CC: Michal Simek <monstr@monstr.eu> CC: Stephen Rothwell <sfr@canb.auug.org.au>
Diffstat (limited to 'drivers/of/address.c')
-rw-r--r--drivers/of/address.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/of/address.c b/drivers/of/address.c
new file mode 100644
index 000000000000..258528d6c4fe
--- /dev/null
+++ b/drivers/of/address.c
@@ -0,0 +1,22 @@
+
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/of_address.h>
+
+/**
+ * of_iomap - Maps the memory mapped IO for a given device_node
+ * @device: the device whose io range will be mapped
+ * @index: index of the io range
+ *
+ * Returns a pointer to the mapped memory
+ */
+void __iomem *of_iomap(struct device_node *np, int index)
+{
+ struct resource res;
+
+ if (of_address_to_resource(np, index, &res))
+ return NULL;
+
+ return ioremap(res.start, 1 + res.end - res.start);
+}
+EXPORT_SYMBOL(of_iomap);