ARM: at91: at91 based machines specify their own irq handler at run time

[deliverable/linux.git] / arch / arm / mach-at91 / irq.c

diff --git a/arch/arm/mach-at91/irq.c b/arch/arm/mach-at91/irq.c
index db8e14112edaf5fa4007762a3c4d4421fd656b7e..390d4df21ef66a42e18d696f06c6959bbac2a8ad 100644 (file)
--- a/arch/arm/mach-at91/irq.c
+++ b/arch/arm/mach-at91/irq.c
@@ -36,6 +36,7 @@
 #include <asm/irq.h>
 #include <asm/setup.h>
 
+#include <asm/exception.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/irq.h>
 #include <asm/mach/map.h>
@@ -45,6 +46,24 @@ static struct irq_domain *at91_aic_domain;
 static struct device_node *at91_aic_np;
 static unsigned int *at91_aic_irq_priorities;
 
+asmlinkage void __exception_irq_entry at91_aic_handle_irq(struct pt_regs *regs)
+{
+       u32 irqnr;
+       u32 irqstat;
+
+       irqnr = at91_aic_read(AT91_AIC_IVR);
+       irqstat = at91_aic_read(AT91_AIC_ISR);
+
+       /*
+        * ISR value is 0 when there is no current interrupt or when there is
+        * a spurious interrupt
+        */
+       if (!irqstat)
+               at91_aic_write(AT91_AIC_EOICR, 0);
+       else
+               handle_IRQ(irqnr, regs);
+}
+
 static void at91_aic_mask_irq(struct irq_data *d)
 {
        /* Disable interrupt on AIC */