[POWERPC] add of_iomap function

The of_iomap function maps memory for a given
device_node and returns a pointer to that memory.
This is used at some places, so it makes sense to
a seperate function.
Signed-off-by: NChristian Krafft <krafft@de.ibm.com>
Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>

arch/powerpc/sysdev/pmi.c

@@ -33,7 +33,7 @@
 #include <asm/of_platform.h>
 #include <asm/io.h>
 #include <asm/pmi.h>
-
+#include <asm/prom.h>
 
 struct pmi_data {
 	struct list_head	handler;
@@ -49,21 +49,6 @@ struct pmi_data {
 };
 
 
-
-static void __iomem *of_iomap(struct device_node *np)
-{
-	struct resource res;
-
-	if (of_address_to_resource(np, 0, &res))
-		return NULL;
-
-	pr_debug("Resource start: 0x%lx\n", res.start);
-	pr_debug("Resource end: 0x%lx\n", res.end);
-
-	return ioremap(res.start, 1 + res.end - res.start);
-}
-
-
 static int pmi_irq_handler(int irq, void *dev_id)
 {
 	struct pmi_data *data;
@@ -154,7 +139,7 @@ static int pmi_of_probe(struct of_device *dev,
 		goto out;
 	}
 
-	data->pmi_reg = of_iomap(np);
+	data->pmi_reg = of_iomap(np, 0);
 	if (!data->pmi_reg) {
 		printk(KERN_ERR "pmi: invalid register address.\n");
 		rc = -EFAULT;

include/asm-powerpc/prom.h

@@ -20,6 +20,7 @@
 #include <linux/platform_device.h>
 #include <asm/irq.h>
 #include <asm/atomic.h>
+#include <asm/io.h>
 
 /* Definitions used by the flattened device tree */
 #define OF_DT_HEADER		0xd00dfeed	/* marker */
@@ -355,6 +356,16 @@ static inline int of_irq_to_resource(struct device_node *dev, int index, struct
 	return irq;
 }
 
+static inline 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);
+}
+
 
 #endif /* __KERNEL__ */
 #endif /* _POWERPC_PROM_H */