[ARM] Add basic support for enable/disable_irq_wake.

arch/arm/kernel/armksyms.c

@@ -127,7 +127,8 @@ EXPORT_SYMBOL(enable_irq);
 EXPORT_SYMBOL(disable_irq);
 EXPORT_SYMBOL(probe_irq_mask);
 EXPORT_SYMBOL(set_irq_type);
-EXPORT_SYMBOL(set_irq_wake);
+EXPORT_SYMBOL(enable_irq_wake);
+EXPORT_SYMBOL(disable_irq_wake);
 EXPORT_SYMBOL(pm_idle);
 EXPORT_SYMBOL(pm_power_off);
 EXPORT_SYMBOL(fp_init);

arch/arm/kernel/irq.c

@@ -129,6 +129,31 @@ void enable_irq(unsigned int irq)
 	spin_unlock_irqrestore(&irq_controller_lock, flags);
 }
 
+/*
+ * Enable wake on selected irq
+ */
+void enable_irq_wake(unsigned int irq)
+{
+	struct irqdesc *desc = irq_desc + irq;
+	unsigned long flags;
+
+	spin_lock_irqsave(&irq_controller_lock, flags);
+	if (desc->chip->wake)
+		desc->chip->wake(irq, 1);
+	spin_unlock_irqrestore(&irq_controller_lock, flags);
+}
+
+void disable_irq_wake(unsigned int irq)
+{
+	struct irqdesc *desc = irq_desc + irq;
+	unsigned long flags;
+
+	spin_lock_irqsave(&irq_controller_lock, flags);
+	if (desc->chip->wake)
+		desc->chip->wake(irq, 0);
+	spin_unlock_irqrestore(&irq_controller_lock, flags);
+}
+
 int show_interrupts(struct seq_file *p, void *v)
 {
 	int i;

include/asm-arm/irq.h

@@ -40,7 +40,8 @@ extern void enable_irq(unsigned int);
 #define IRQT_PROBE	(1 << 4)
 
 int set_irq_type(unsigned int irq, unsigned int type);
-
+void disable_irq_wake(unsigned int irq);
+void enable_irq_wake(unsigned int irq);
 int setup_irq(unsigned int, struct irqaction *);
 
 #endif

include/asm-arm/mach/irq.h

@@ -40,6 +40,10 @@ struct irqchip {
 	 * Set the type of the IRQ.
 	 */
 	int (*type)(unsigned int, unsigned int);
+	/*
+	 * Set wakeup-enable on the selected IRQ
+	 */
+	int (*wake)(unsigned int, unsigned int);
 };
 
 struct irqdesc {