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Commit ba9a2331 authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Linus Torvalds
Browse files

[PATCH] genirq: add irq-wake (power-management) support 



Enable platforms to set the irq-wake (power-management) properties of an IRQ.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 7a55713a

include/linux/interrupt.h

+14 −0
Original line number Diff line number Diff line
@@ -36,6 +36,20 @@ extern void free_irq(unsigned int, void *); 
extern void disable_irq_nosync(unsigned int irq);

extern void disable_irq(unsigned int irq);

extern void enable_irq(unsigned int irq);



/* IRQ wakeup (PM) control: */

extern int set_irq_wake(unsigned int irq, unsigned int on);



static inline int enable_irq_wake(unsigned int irq)

{

	return set_irq_wake(irq, 1);

}



static inline int disable_irq_wake(unsigned int irq)

{

	return set_irq_wake(irq, 0);

}



#endif



#ifndef __ARCH_SET_SOFTIRQ_PENDING

kernel/irq/manage.c

+21 −0
Original line number Diff line number Diff line
@@ -133,6 +133,27 @@ void enable_irq(unsigned int irq) 
}

EXPORT_SYMBOL(enable_irq);



/**

 *	set_irq_wake - control irq power management wakeup

 *	@irq:	interrupt to control

 *	@on:	enable/disable power management wakeup

 *

 *	Enable/disable power management wakeup mode

 */

int set_irq_wake(unsigned int irq, unsigned int on)

{

	struct irq_desc *desc = irq_desc + irq;

	unsigned long flags;

	int ret = -ENXIO;



	spin_lock_irqsave(&desc->lock, flags);

	if (desc->chip->set_wake)

		ret = desc->chip->set_wake(irq, on);

	spin_unlock_irqrestore(&desc->lock, flags);

	return ret;

}

EXPORT_SYMBOL(set_irq_wake);



/*

 * Internal function that tells the architecture code whether a

 * particular irq has been exclusively allocated or is available