From: Ingo Molnar <mingo@elte.hu>
To: linux-kernel@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Russell King <rmk@arm.linux.org.uk>,
Andrew Morton <akpm@osdl.org>,
Christoph Hellwig <hch@infradead.org>,
linux-arm-kernel@lists.arm.linux.org.uk
Subject: [patch 23/50] genirq: add irq-wake (power-management) support
Date: Wed, 17 May 2006 02:17:01 +0200 [thread overview]
Message-ID: <20060517001701.GX12877@elte.hu> (raw)
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
reply other threads:[~2006-05-17 0:26 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
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