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Commit 6bf05fd7 authored by Christian Krafft's avatar Christian Krafft Committed by Arnd Bergmann
Browse files

[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: default avatarChristian Krafft <krafft@de.ibm.com>
Signed-off-by: default avatarArnd Bergmann <arnd.bergmann@de.ibm.com>
parent 4a065f94

arch/powerpc/sysdev/pmi.c

+2 −17
Original line number Diff line number Diff line
@@ -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

+11 −0
Original line number Diff line number Diff line
@@ -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 */