+
+#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);