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Commit bd00860e authored by Sudeep Holla's avatar Sudeep Holla
Browse files

of/device: add helper to get cpu device node from logical cpu index 



Multiple drivers need to get the cpu device node from the cpu logical
index and then access the of_node.

This patch adds helper function to fetch the device node directly.

Acked-by: default avatarRob Herring <rob.herring@calxeda.com>
Signed-off-by: default avatarSudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>
parent f86e4718

include/linux/of_device.h

+15 −0
Original line number Diff line number Diff line 
#ifndef _LINUX_OF_DEVICE_H

#define _LINUX_OF_DEVICE_H



#include <linux/cpu.h>

#include <linux/platform_device.h>

#include <linux/of_platform.h> /* temporary until merge */
@@ -43,6 +44,15 @@ static inline void of_device_node_put(struct device *dev) 
	of_node_put(dev->of_node);

}



static inline struct device_node *of_cpu_device_node_get(int cpu)

{

	struct device *cpu_dev;

	cpu_dev = get_cpu_device(cpu);

	if (!cpu_dev)

		return NULL;

	return of_node_get(cpu_dev->of_node);

}



#else /* CONFIG_OF */



static inline int of_driver_match_device(struct device *dev,
@@ -67,6 +77,11 @@ static inline const struct of_device_id *of_match_device( 
{

	return NULL;

}



static inline struct device_node *of_cpu_device_node_get(int cpu)

{

	return NULL;

}

#endif /* CONFIG_OF */



#endif /* _LINUX_OF_DEVICE_H */