arm: add set_handle_irq() to register the parent IRQ controller handl…

…er function In order to allow irqchip drivers to register their IRQ handling function as the parent IRQ controller handler function, we provide a convenience function. This will avoid poking directly into the global handle_arch_irq variable. Suggested by Arnd Bergmann. Signed-off-by: Thomas Petazzoni <[email protected]> [Rob Herring: remove warning. 1st one to initialize wins.] Signed-off-by: Rob Herring <[email protected]> Acked-by: Olof Johansson <[email protected]>
chewitt · Jan 10, 2013 · 73171d1 · 73171d1
1 parent f6e916b
commit 73171d1
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diff --git a/arch/arm/include/asm/mach/irq.h b/arch/arm/include/asm/mach/irq.h
@@ -22,6 +22,7 @@ extern int show_fiq_list(struct seq_file *, int);
 
 #ifdef CONFIG_MULTI_IRQ_HANDLER
 extern void (*handle_arch_irq)(struct pt_regs *);
+extern void set_handle_irq(void (*handle_irq)(struct pt_regs *));
 #endif
 
 /*

diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c
@@ -117,6 +117,16 @@ void __init init_IRQ(void)
 	machine_desc->init_irq();
 }
 
+#ifdef CONFIG_MULTI_IRQ_HANDLER
+void __init set_handle_irq(void (*handle_irq)(struct pt_regs *))
+{
+	if (handle_arch_irq)
+		return;
+
+	handle_arch_irq = handle_irq;
+}
+#endif
+
 #ifdef CONFIG_SPARSE_IRQ
 int __init arch_probe_nr_irqs(void)
 {