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);