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| author | Thomas Gleixner <tglx@linutronix.de> | 2006-06-29 02:24:55 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-29 10:26:24 -0700 |
| commit | ba9a2331bae5da8f65be3722b9e2d210f1987857 (patch) | |
| tree | ca7cf6a1cfcab2fc4423eb38832236cfb627eaf2 | |
| parent | 7a55713ab456d267815fd5ca3c3d0fd14301f306 (diff) | |
| download | op-kernel-dev-ba9a2331bae5da8f65be3722b9e2d210f1987857.zip op-kernel-dev-ba9a2331bae5da8f65be3722b9e2d210f1987857.tar.gz | |
[PATCH] genirq: add irq-wake (power-management) support
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>
| -rw-r--r-- | include/linux/interrupt.h | 14 | ||||
| -rw-r--r-- | kernel/irq/manage.c | 21 |
2 files changed, 35 insertions, 0 deletions
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h index 70741e1..db2a63a 100644 --- a/include/linux/interrupt.h +++ b/include/linux/interrupt.h @@ -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 diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index b61784e..3ed7aee 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -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 |
