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[POWERPC] add of_iomap function

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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: Christian Krafft <krafft@de.ibm.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
This commit is contained in:
Christian Krafft
2007-04-23 21:35:45 +02:00
committed by Arnd Bergmann
parent 4a065f9418
commit 6bf05fd776
2 changed files with 13 additions and 17 deletions
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11
include/asm-powerpc/prom.h
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@@ -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 */