[ARM] pxa: initialize default interrupt priority and use ICHP for IRQ handling

Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/arch/arm/mach-pxa/irq.c b/arch/arm/mach-pxa/irq.c
index f6e0300e4f64..d694ce289668 100644
--- a/arch/arm/mach-pxa/irq.c
+++ b/arch/arm/mach-pxa/irq.c
@@ -120,7 +120,7 @@ static void __init pxa_init_low_gpio_irq(set_wake_t fn)
 
 void __init pxa_init_irq(int irq_nr, set_wake_t fn)
 {
-        int irq;
+        int irq, i;
 
         pxa_internal_irq_nr = irq_nr;
 
@@ -129,6 +129,12 @@ void __init pxa_init_irq(int irq_nr, set_wake_t fn)
                 _ICLR(irq) = 0; /* all IRQs are IRQ, not FIQ */
         }
 
+        /* initialize interrupt priority */
+        if (cpu_is_pxa27x() || cpu_is_pxa3xx()) {
+                for (i = 0; i < irq_nr; i++)
+                        IPR(i) = i | (1 << 31);
+        }
+
         /* only unmasked interrupts kick us out of idle */
         ICCR = 1;