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

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

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Thomas Gleixner 2006-06-29 02:24:55 -07:00 committed by Linus Torvalds
parent 7a55713ab4
commit ba9a2331ba
2 changed files with 35 additions and 0 deletions
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14
include/linux/interrupt.h
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@ -36,6 +36,20 @@ extern void free_irq(unsigned int, void *);
extern void disable_irq_nosync(unsigned int irq); extern void disable_irq_nosync(unsigned int irq);
extern void disable_irq(unsigned int irq); extern void disable_irq(unsigned int irq);
extern void enable_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 #endif
#ifndef __ARCH_SET_SOFTIRQ_PENDING #ifndef __ARCH_SET_SOFTIRQ_PENDING

21
kernel/irq/manage.c
View File

@ -133,6 +133,27 @@ void enable_irq(unsigned int irq)
} }
EXPORT_SYMBOL(enable_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 * Internal function that tells the architecture code whether a
* particular irq has been exclusively allocated or is available * particular irq has been exclusively allocated or is available