Messages in this thread Patch in this message | | | Date | Wed, 17 May 2006 02:17:01 +0200 | From | Ingo Molnar <> | Subject | [patch 23/50] genirq: add irq-wake (power-management) support |
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From: Thomas Gleixner <tglx@linutronix.de>
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> --- include/linux/interrupt.h | 14 ++++++++++++++ kernel/irq/manage.c | 21 +++++++++++++++++++++ 2 files changed, 35 insertions(+)
Index: linux-genirq.q/include/linux/interrupt.h =================================================================== --- linux-genirq.q.orig/include/linux/interrupt.h +++ linux-genirq.q/include/linux/interrupt.h @@ -56,6 +56,20 @@ 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 Index: linux-genirq.q/kernel/irq/manage.c =================================================================== --- linux-genirq.q.orig/kernel/irq/manage.c +++ linux-genirq.q/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->handler->set_wake) + ret = desc->handler->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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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